Quartz 4

Pediatric Dentistry LOs

29 min read

How to read this sheet

Each objective is a broad competency statement followed on the same line by an italicised split: High-yield = the specific facts, numbers, and named classifications most likely tested in exams or critical in clinic; Lower = background, niche, or contextual detail. Bold inside a High-yield list flags the single highest-yield point of that objective.

Pediatric Dentistry — Learning Objectives

L1: The Paediatric Clinical Examination

  • Compare and contrast the paediatric versus adult clinical examination, accounting for child-specific anatomy and behaviour. High-yield: clinical time limited to 30–40 minutes max; pulp proportionally larger so pulp horns sit closer to the surface; teeth smaller, access more limited; the defining difference is the child did not request treatment and often does not understand why they are there. Lower: limited prior experience of noise/taste/smells/paraesthesia, may not be confident with strangers, cannot sit still.
  • Construct a comprehensive paediatric history from the parent/guardian in a logical, systematic, regularly-updated manner. High-yield: document the presenting complaint in the parent’s own words (quotation marks); urgency variables = does pain affect ability to sleep, eat, or drink. Lower: reason for visit (referral/routine/recall/pain), family and social history (siblings, schooling, hobbies), recording the parent’s separate concerns.
  • Explain the medical and pregnancy history components and their dental relevance. High-yield: pregnancy/delivery complications (prematurity, perinatal problems) correlate with enamel developmental defects as teeth are calcifying then; cardiovascular focus matters because children have higher cardiac output and basal metabolic rate. Lower: systematic system-by-system review (CVS, CNS/seizures, endocrine, GIT, respiratory, bleeding, urogenital, allergies); Apgar scores, birth weight, type of delivery; use age-appropriate language (“tablets every morning”).
  • Apply developmental milestone assessment to inform behaviour management. High-yield: motor skills and socialisation level (Piaget’s stages) guide behaviour management strategy; Frankl behaviour scale used to record how the child coped with prior treatment. Lower: speech/language development, dental history of previous preventive treatment and pain control methods.
  • Describe the extra-oral examination sequence and findings. High-yield: profile assessment — frontal (round/tapering/square/symmetrical/asymmetrical), lateral (straight/convex/concave), skeletal pattern Class I/II/III, lips (competent/incompetent/lip trap). Lower: general appraisal, gait, height/weight; TMJ opening/closing observation (deep palpation usually unnecessary unless symptomatic); lymph node and skin/eye checks; lesions suggesting chickenpox/measles/hand-foot-and-mouth.
  • Recognise the structured intra-oral soft-tissue examination and lesion description. High-yield: examine soft tissues FIRST — do not look at the teeth immediately; describe lesions systematically (location, colour, size, texture, history, onset). Lower: paediatric abscesses often small/subtle rather than fluctuant; post-LA lip biting presents as a large ulcer; enlarged tonsils (snoring/sleep) and bifid uvula (submucous cleft indicator).
  • Classify occlusal and orthodontic relationships in the developing dentition. High-yield: primary molar terminal plane relationships — flush terminal plane, mesial step, distal step; Angle’s classification for permanent teeth; canine relationship, overjet, overbite, crossbite. Lower: midline, rotations, spacing/crowding/arch deformity; eruption normal vs abnormal; habits (digit sucking, mouth breathing, tongue thrusting).
  • Describe paediatric dental anomalies and developmental defects detected on charting. High-yield: count the teeth to detect supernumerary or congenitally missing teeth; differentiate caries from Molar Incisor Hypomineralisation (MIH) and Turner’s tooth (premolar enamel defect from infection of the preceding primary tooth). Lower: tooth identification, dental charting and caries/restoration recording.
  • Interpret the tooth-numbering systems used in dentistry. High-yield: the three systems — FDI/International (two-digit), Universal/ADA, and Palmer notation. Lower: see Dental charting systems for quadrant-coding detail.
  • Apply radiographic and special-test selection in children. High-yield: bitewing is the gold standard for caries detection (Size 0 for young children) and is preferred over PAs in primary dentition because it captures the furcation area where paediatric infection manifests; pulp sensibility tests are unreliable/subjective in children — use only if other findings inconclusive. Lower: maxillary occlusal good for growth/supernumeraries and better tolerated than a PA; panoramic useful in mixed dentition (ages 9–12) for canine checks; mobility testing for trauma follow-up (ankylosis); photographs especially important in trauma.
  • Apply caries risk assessment to drive a holistic, sequenced treatment plan. High-yield: risk banding — moderate = 1–2 new lesions/year, high = 3 or more new lesions/year; goal is to move the child out of the “restorative spiral” via prevention. Lower: CAMBRA framework; treatment plan should be personalised, holistic (“treat a child not a tooth”), flexible, sequenced (prophy/sealants first, small before large, upper before lower), forward-thinking and realistic; confirm legal guardian for consent; consider GA referral (CORGA/DEGA) if treatment risks long-term phobia.

L2: Dental Anomalies — Part 1

  • Describe the stages of tooth development (initiation→bud→cap→bell→eruption) and map each anomaly to the stage where it arises. High-yield: bud/initiation → tooth number (supernumerary, hypodontia); bell/morphodifferentiation → tooth size & shape (macro-/microdontia); apposition → enamel hypoplasia; calcification → amelogenesis/dentinogenesis imperfecta; maturation → hypomineralisation; eruption → impacted teeth. Lower: tooth development is an ectodermal process (neural crest migration + ectomesenchyme condensation); cap/proliferation → odontogenic cysts; histodifferentiation → regional odontodysplasia.
  • Explain the distinction between an anomaly and a trait. High-yield: anomaly = variant occurring rarely in a population; trait = variant common enough to characterise a population’s dentition. Lower: trait examples — incisor shovelling, cusp of Carabelli, protostylid (extra buccal molar cusp).
  • Define hyperdontia and supernumerary teeth, including aetiology. High-yield: any tooth/structure in excess of the usual number for a region of the arch; “structure” used because they may be poorly organised; hyperdontia and supernumerary are the preferred terms. Lower: dichotomy/hyperactive dental lamina/multifactorial theories; “structure” wording reflects disorganised forms.
  • Describe the prevalence and demographic pattern of hyperdontia. High-yield: permanent (0.5–3.5%) > primary (0.2–0.8%); M > F (~1.18:1); maxillary incisor region most common site (> mandibular premolar > maxillary molar). Lower: true prevalence may reach 10% (many unerupted/undiagnosed); some studies cite a 2:1 male ratio.
  • Classify supernumerary teeth and recognise the mesiodens. High-yield: by morphology — conical (peg), tuberculate, supplemental, odontome; tuberculate often inhibits eruption; mesiodens = most common supernumerary, anterior maxillary midline, usually conical, may be inverted. Lower: also classified by location (mesiodens/paramolar/distomolar/parapremolar), orientation (vertical/inverted/horizontal), and position (buccal/palatal/transverse); odontomes are hamartomas (complex = haphazard mass, compound = tooth-like denticles).
  • Recognise the clinical signs, complications, and management of hyperdontia. High-yield: signs — midline diastema, failure/delay of adjacent (esp. upper incisor) eruption, displacement, retained primaries; ~10% risk of dentigerous cyst (3rd–4th decade); treatment guided by type/position (monitor vs surgical removal). Lower: associated syndromes — cleidocranial dysplasia, Gardner (FAP), cleft lip/palate; removal before age 7 may benefit successors (Omer, 2010); rare nasal eruption/root resorption.
  • Define and classify hypodontia/oligodontia/anodontia by number of missing teeth. High-yield: developmental absence of ≥1 tooth excluding 3rd molars; hypodontia <6, oligodontia ≥6 missing, anodontia = none; severity mild 1–2, moderate 3–5, severe ≥6; WA referral to PCH requires ≥10 missing permanent teeth. Lower: “agenesis” used when syndromic; oligodontia = severe category synonym.
  • Describe the prevalence and tooth-type distribution of hypodontia. High-yield: most common congenital malformation; permanent 4–6% (primary uncommon, 0.1–4.1%); F > M (~3:2); mandibular 2nd premolar most commonly missing overall (~30%), then maxillary lateral incisor (~24%). Lower: maxilla (53%) slightly > mandible; Butler’s Field Theory — most distal tooth in each field is missing (3rd molars, 2nd premolars, lateral incisors); Polder sequence P2ᵢ > I2ₛ > P2ₛ.
  • Explain the aetiology, syndromic associations, and clinical features of hypodontia. High-yield: genetic + environmental; key genes MSX1, PAX9, AXIN2; >50 syndromes — esp. hypohidrotic ectodermal dysplasia (hair/sweat/teeth, often conical); features include retained/infraoccluded primaries, microdontia of remaining teeth. Lower: SMMCI as a midline-defect red flag; environmental triggers (thalidomide, radio/chemotherapy, trauma, rubella); associated lip protrusion, increased overbite, ectopic canines.
  • Define microdontia and macrodontia and classify each, with management. High-yield: teeth smaller/larger than usual limits of variation; macrodontia practically = ≥1 mm larger than the antimere/mean; both classified true generalised / relative generalised / localised(isolated); peg laterals = localised microdontia of maxillary lateral incisor (tapered crown, short roots), F > M, maxillary > mandibular. Lower: “microdont lateral” preferred over “peg lateral”; macrodontia M > F (1.1–3.6% permanent), syndromes (KBG, pituitary gigantism, hemifacial hyperplasia); conservative treatment first (composite/veneers ± ortho), macrodont stripping ± extraction/implant.

L4: Dental Anomalies — Part 2

  • Explain how morphological anomalies correlate with the developmental stage at which odontogenesis is disrupted (crown- vs root-stage defects). High-yield: gemination arises in the cap stage (lecture quiz); fusion, gemination and evaginatus originate during crown formation; embryological timing predicts clinical presentation and complications. Lower: distinction between early vs late odontogenesis in fusion (early = near-normal size, late = up to double size or bifid crown).
  • Apply the general diagnostic principles for detecting dental anomalies (systematic radiographic reading, anomaly clustering, umbrella terminology). High-yield: examine radiographs methodically (condyle → ramus → mandibular body → sinuses/septum/palate → count teeth → assess pulp spaces); if one anomaly is found, suspect others — primary-dentition anomalies predict permanent-dentition anomalies (e.g. missing successors). Lower: rationale for umbrella terms (e.g. “double tooth” before fusion/gemination; “developmental defect of enamel” before MIH).
  • Define double tooth and distinguish fusion from gemination clinically and radiographically. High-yield: double tooth = two or more elements, incisal notching + labial grooving clinically and pulpal bifurcation radiographically (Winter, 1969); gemination = normal tooth count in quadrant (one common pulp chamber, from same follicle, macrodont in permanent dentition); fusion = reduced tooth count (one or two pulp chambers); lecture quiz — 20 teeth but 21 crowns = gemination. Lower: alternative terms (connate, schizodontia, dichotomy); M = F; predominantly incisor/canine region and maxilla.
  • Describe the prevalence, etiology and clinical problems of double teeth, including implications for the permanent successor. High-yield: primary dentition 0.1–3.0%, permanent 0.1–0.8%; bilateral primary double teeth and primary fusion predict aplasia/anomaly of the permanent successor — mandates OPG; extraction risk (assuming one root when two exist → fracture). Lower: etiology (fusion of two buds, splitting of one bud, crowding/trauma — Milano 1999); other problems (groove caries, periodontal extension, diastema, delayed exfoliation, malocclusion); management (sealants, flowable composite, hemisection, reshaping if single canal).
  • Define concrescence and explain why it is managed differently from fusion/gemination. High-yield: union at the cementum/root level only — enamel and CEJ remain separate; mandatory radiographic evaluation (PA, OPG or CBCT) before extraction or endodontics. Lower: rarity; deposition occurs after root formation.
  • Classify talon cusp and recognise its complications and clinical significance. High-yield: cusp-like palatal projection on an anterior tooth extending ≥ half the distance from CEJ to incisal edge (Davis & Brook, 1985 / Type 1 Hattab); Type 2 semi-talon = ≥ 1 mm but < half distance; Type 3 = trace/enlarged cingulum; pulp tissue frequently extends into the cusp → reduce over 2–3 visits for tertiary dentine; radiographically a V-shaped radio-opacity superimposed on the crown. Lower: maxillary anterior predominance, M > F (1.9 : 1); permanent 1–2.5%, primary 0.5–0.6%; posterior equivalent = dens evaginatus; syndromic links (Rubinstein-Taybi, Sturge-Weber, Ellis-van Creveld); primary lateral talon → 78.3% odontogenic abnormality in successors (Lee 2007).
  • Describe dens evaginatus and explain why it is a critical differential for “perfect teeth” presenting with infection. High-yield: enamel-covered tubercle on the occlusal surface of a premolar that fractures/wears → pulp necrosis and periapical pathology in caries-free teeth; mandibular predominance, usually bilateral, presents age 10–13 as premolars erupt; wide/superficial pulp horns = highest fracture-exposure risk; manage with composite reinforcement / sequential grinding before full occlusion. Lower: prevalence 0.1–4.7%; Oehlers pulp-content classification (wide 34%, narrow 22%, isolated 20%, constricted 14%, none 10%); population links (Asian/Inuit/Native American, rare in Whites); Cvek pulpotomy / revascularisation / CBCT.
  • Define dens invaginatus and apply Oehlers’ classification to prognosis. High-yield: infolding of enamel and dentine toward the pulp (“tooth within a tooth”); responsible for more adverse events in children than any other dental anomaly; Oehlers (1957) Type 1 = within crown, Type 2 = past CEJ but not periapex, Type 3 = perforates (3a lateral foramen, 3b apical foramen → periapical involvement, often extraction); creates a bacterial conduit → early pulp necrosis and periapical abscess. Lower: inverse of evaginatus; Focal proliferation theory (Rushton 1937) is the EXAM answer / most accepted; permanent 0.2–10.0% (maxillary lateral incisors most common), primary 0.1%; Rushton coronal vs radicular forms; management — early prophylactic sealing, autotransplantation, CBCT-guided endodontics.

L5: Molar Incisor Hypomineralisation & HSPM

  • Define MIH and contrast it with related enamel defects (qualitative vs quantitative). High-yield: MIH = hypomineralisation of systemic origin affecting one to four first permanent molars, with or without permanent incisors; it is a qualitative defect (altered translucency/opacity) vs hypoplasia which is quantitative (thin/missing enamel — pits, grooves); presents as demarcated opacities (borders traceable) vs fluorosis which is diffuse (borders hard to trace); Weerheijm et al. 2001/2003. Lower: incisor-only hypomineralisation exists as a subset; extended scope now recognises second primary molars and permanent/primary canine tips; mixed defects can coexist in one mouth.
  • Explain the proposed aetiology of MIH and why HSPM aetiology is considered more perplexing. High-yield: exact cause unknown but systemic origin — in exams acknowledge specific associations rather than saying “unknown”; prenatal (pregnancy complications, febrile illness, maternal hypertension), perinatal (foetal distress, hypoxia, low/high birth weight, prematurity), postnatal (antibiotics, otitis media, febrile childhood illness, asthma/respiratory disease); genetic SCUBE1 association. Lower: HSPM perplexing because primary teeth calcify ~4th fetal month yet predominantly only second primary molars are affected; twin studies implicate maternal smoking, socioeconomic status, vitamin D.
  • Recall the prevalence of MIH and HSPM and the correct age for accurate assessment. High-yield: MIH pooled global prevalence ~14.2% (≈1 in 7, Zhao et al. 2018), worldwide range 2.4–40.2%, Australia 22–44%; assess at 6–7 years when FPMs and incisors have erupted (earlier = underestimation); HSPM ~10% globally (Australia 14%, Owen et al. 2017). Lower: no male–female difference (14.3% vs 14.4%); higher in children ≤10 yrs (15.1% vs 12.1%); regional highs Spain 21.1%, South America 18.0%; NZ 14.9–18.8%.
  • Apply the EAPD/Weerheijm judgement criteria to diagnose MIH and exclude differentials. High-yield: five criteria — demarcated opacity (normal-thickness enamel, smooth surface, white/yellow/brown), post-eruptive breakdown (PEB), atypical restoration, extracted molar due to MIH, and unerupted; record colour, PEB presence, and sensitivity (not vague “hypo”/“caries”); exclude amelogenesis imperfecta, hypoplasia, fluorosis/diffuse opacities, tetracycline staining, white-spot caries, erosion, normal cuspal/ridge opacities. Lower: large caries with demarcated border opacities should be judged MIH; radiographic diagnosis is difficult unless obvious PEB; diagnose holistically with medical history.
  • Describe the clinical features distinguishing demarcated opacities from post-eruptive breakdown and the asymmetry of distribution. High-yield: opacities are demarcated, asymmetrical, colour white → cream → yellow → brown; enamel thickness normal at eruption but porous/weak → PEB under masticatory forces creating irregular surfaces, plaque retention and secondary caries (developmental breakdown, not primary caries); breakdown occurs in atypical sites (cuspal, buccal smooth, proximal). Lower: maxillary incisors more involved than mandibular; atypical restorations extending to buccal/palatal surfaces flag underlying MIH; HSPM in Es predicts MIH.
  • Explain the basis of hypersensitivity, caries susceptibility and compromised bonding in MIH enamel. High-yield: affected teeth hypersensitive to thermal/mechanical stimuli and hard to anaesthetise (subclinical pulpal inflammation); TRPV1 heat-receptor expression and innervation density raised in MIH pulps (Rodd et al. 2007); bacteria penetrate intact-looking porous enamel into dentinal tubules (Fagrell et al. 2008). Lower: brown enamel = lowest mineral density, ~15–21× protein (albumin, α-1-antitrypsin, antithrombin III), white ~8×; sensitivity → brushing avoidance → caries risk; bonding weak due to protein/porosity, NaOCl deproteinisation may help, maintain sound enamel margins.
  • Classify MIH/HSPM by severity and link colour to tooth mineral density (TMD). High-yield: mild = opacities (white/yellow), intact enamel, no/slight sensitivity, no caries; moderate/severe = brown opacities, PEB, atypical restorations, sensitivity, secondary caries, aesthetic problems; Micro-CT TMD (2017) — brown 1.79, yellow/creamy 2.21, white 2.43, unaffected 2.46 g/cm³ (brown/yellow significantly lower; white statistically similar to normal). Lower: brown/yellow TMD rises outer→inner third, white/unaffected falls; darker = less mineral, more carbon/organic content.
  • Apply a graded management approach for sensitivity, prevention and restoration across dental age. High-yield: prevention/desensitisation first — fluoride (1000 ppm toothpaste, varnish, mouthwash), CPP-ACP, fissure sealants (GIC if partially erupted, resin composite if fully erupted with isolation); restore with composite or full-coverage stainless steel/preformed metal crowns for severe molars; mild incisors → microabrasion/resin infiltration (white) or etch-bleach-seal (yellow-brown); refer severe cases to specialist ideally before 8 years. Lower: avoid multi-surface GICs; avoid triplex cold air on brown/yellow opacities without warning; delay porcelain veneers to adulthood; Lygidakis 2010 dental-age table.
  • Evaluate the indications, timing and contraindications for extraction of MIH-affected molars. High-yield: three timing strategies — immediate (infective/severely broken down), delayed/intermediate (extract when 7s are erupting / bifurcation of the 7 developing so they migrate into the FPM space), and orthodontic (planned ortho treatment); indications include extent of defect, PEB, severe sensitivity, child cooperation, developing malocclusion, third-molar status. Lower: contraindications — Class II, deep bite, lip trap, brachyfacial type, existing spacing; a filling commits the child to a 50–60-year restorative cycle so timely extraction may be preferable; ortho consult prevents cases going awry.
  • Describe HSPM, its diagnostic overlap with MIH, and its predictive value for MIH. High-yield: HSPM = demarcated qualitative enamel defects of one to four second primary molars, clinically identical to MIH; strong predictor of MIH — odds ratio 4.66 (up to ~6×), co-occurrence ~20% (Garot et al. 2018); a single HSPM should prompt close monitoring of erupting FPMs. Lower: managed like MIH (fluoride, CPP-ACP, sealants, GIC interim, composite, PMCs); associated hypomineralised primary canines; chronic infection of an HSPM can disrupt the permanent successor’s amelogenesis (Turner tooth); behaviour management problems and higher DMFT persist (Jälevik & Klingberg 2012), though dental anxiety normalises by adulthood.

L6: Antibiotics, LA & Analgesics

  • Apply legal and clinical prescription-writing standards for paediatric patients. High-yield: patient weight is mandatory for dosing; full generic drug name (Metronidazole, not Flagyl), drug strength, form, suspension concentration in mg/mL, route (“Orally”), and “for dental treatment only”; dentists cannot prescribe repeats. Lower: PBS database use, half-hour-before-meals/bedtime compliance trick, Therapeutic Guidelines (v3) chapters as reference.
  • Explain principles of antibiotic stewardship in paediatric dentistry. High-yield: narrow-spectrum preferred over broad-spectrum to spare gut flora; target the specific infection; know when to extract versus prescribe (source is the cause). Lower: case of repeated I&D and three antibiotic courses without addressing the source; sessile abscess identification via soft tissue retraction.
  • Describe first-line antibiotic selection and weight-based dosing for odontogenic infections. High-yield: Phenoxymethylpenicillin (Pen V) is first choice — 12.5 mg/kg up to 500 mg, 6-hourly for 5 days; Amoxycillin 12.5 mg/kg up to 500 mg, 8-hourly for 5 days (food-independent, fewer doses). Lower: Pen V activity vs Actinomyces/Strep/Fusobacterium, beta-lactamase inactivation, fewer GI effects than amoxycillin; preparations 125/150/250 mg per 5 mL.
  • Compare alternative and adjunctive antibiotics and their indications. High-yield: Clindamycin is first choice in penicillin allergy — 7.5 mg/kg up to 300 mg, 8-hourly, 5 days; Cephalexin 12.5 mg/kg up to 500 mg, 8-hourly, 5 days; Metronidazole 10 mg/kg up to 400 mg, 12-hourly, 5 days as an add-on for spreading/anaerobic infections. Lower: cephalexin contraindicated with recent/long-term penicillin and caution in acute rheumatic fever history; amoxicillin+clavulanate covers anaerobes so needs no metronidazole; metronidazole avoid alcohol 24 h, interacts with warfarin.
  • Apply a structured approach to penicillin allergy and beta-lactam cross-reactivity. High-yield: severe allergy (anaphylaxis, bronchospasm, urticaria, angioedema) → avoid ALL beta-lactams; non-severe (mild rash) → cephalosporins/carbapenems with caution; cross-reactivity driven by similar/identical R1 side chains. Lower: childhood rashes usually viral not true allergy (rechallenge under specialist to avoid unnecessary clindamycin); immediate IgE vs delayed T-cell reactions; documentation of allergy alerts.
  • Describe paediatric analgesic selection and weight-based dosing. High-yield: Paracetamol 15 mg/kg, 4–6-hourly, max 4 g/day (120 mg/5 mL); Ibuprofen 5–10 mg/kg, 6–8-hourly, max 2400 mg/day (100 mg/5 mL), lowest effective dose ≤3 days without review. Lower: paracetamol contraindicated in renal/hepatic impairment; ibuprofen contraindicated in asthma/rhinitis/urticaria, renal/cardiac impairment, GI pathology, bleeding disorders, anticoagulants/corticosteroids (NSAID COX inhibition → bleeding and gastric irritation).
  • Explain why codeine and aspirin are contraindicated in children. High-yield: codeine is contraindicated in children — CYP2D6 converts it to morphine, with fatal respiratory depression in ultra-rapid metabolisers; not under 12 yrs, not 12–18 yrs post-tonsillectomy/adenoidectomy; aspirin banned under 16 yrs due to Reye syndrome. Lower: OSA children at particular opioid risk; codeine rescheduled to Schedule 4 (1 Feb 2018); Painstop combinations are historical reference only.
  • Calculate maximum local anaesthetic doses and identify agents by potency. High-yield: 2% Lignocaine + 1:80,000 adrenaline and 4% Articaine + 1:100,000 both 7 mg/kg; 0.5% Bupivacaine + 1:200,000 = 2 mg/kg; 2% lignocaine = 20 mg/mL, so a 25 kg child: 7 × 25 = 175 mg ÷ 20 = 8.75 mL ÷ 2.2 mL ≈ 3.9 carpules. Lower: formula method [mg/kg × (kg/10) × 1/concentration = mL]; carpule content 2.2 mL = 44 mg, 1.8 mL = 36 mg, 1.7 mL = 34 mg; amides (lignocaine/articaine/prilocaine) common, esters mainly topical; Australian 2.2 mL carpule vs international 1.8/1.7 mL.
  • Explain paediatric LA toxicity risk, physiology, and clinical safety practice. High-yield: immature liver enzymes slow LA detoxification and immature CNS/CVS increase toxicity susceptibility at lower doses; avoid long-acting bupivacaine in children (9–12 h soft-tissue anaesthesia → self-inflicted lip/cheek ulceration); strictly adhere to calculated max doses. Lower: high cardiac output/perfusion and high metabolic rate; toxicity signs (CNS depression/sleepiness, reduced cardiac contractility/output, respiratory arrest); document agent, total mg, vasoconstrictor, technique, weight; use staged half-carpule injection.
  • Describe injection techniques and behavioural/delivery adjuncts in children. High-yield: Articaine infiltration is preferred over IANB for most routine paediatric restorative work; IANB has the lowest success rate of major nerve blocks (Malamed). Lower: paediatric ramus is shorter and narrower A-P, short 27–30 gauge needle, ~20 mm to bony contact, landmarks (coronoid notch, pterygomandibular raphe); STA/“The WAND” computer-regulated and PDL-capable delivery; Dental Vibe (gate theory, conflicting evidence) and camouflage syringes.

L7: Orofacial Infections

  • Apply a structured diagnostic sieve to categorise the cause of a paediatric orofacial lesion before committing to a diagnosis. High-yield: VITAMIND IC mnemonic (Vascular, Inflammatory, Traumatic, Autoimmune, Metabolic, Infection, Neoplastic, Degenerative, Idiopathic, Congenital); Infection is the focus but neoplastic/vascular must be excluded. Lower: per-letter exemplars such as port-wine stain/Sturge–Weber (congenital) and idiopathic root resorption.
  • Classify paediatric orofacial infections into their three aetiological groups and place named conditions in the correct group. High-yield: bacterial (odontogenic — caries, periodontal), viral, and fungal (candidosis); the lecture’s primary emphasis is on viral conditions. Lower: less common bacterial entities — scarlet fever, TB, atypical mycobacteria, actinomycosis, syphilis, impetigo, osteomyelitis.
  • Explain the management principle for localised bacterial/odontogenic infection versus when antibiotics are indicated. High-yield: first-line is source removal (extraction/pulpotomy); antibiotics are reserved for systemic involvement. Lower: the full bacterial differential list as background context for source-control reasoning.
  • Describe primary herpetic gingivostomatitis — its agent, demographics, and the danger sign that drives management. High-yield: HSV-1; peak incidence 12–18 months (often coincides with lower incisor eruption); febrile illness 37.8–38.9 °C, diffuse erythematous shiny gingiva, intraepithelial vesicles, and painful eating/drinking causing dehydration risk; ~60% of population infected but only ~1% show acute primary symptoms. Lower: HSV-2 in occasional cases (genital herpes/sexual abuse), no gender predilection.
  • Recognise the autoinoculation and latency hazards of HSV and the self-limiting disease course. High-yield: discourage child from touching mouth then eyes → herpetic keratoconjunctivitis; ulcers heal without scarring in 10–14 days; virus becomes latent in the trigeminal ganglion. Lower: 3–5 day incubation with 48-hour prodrome (irritability, pyrexia, malaise); transmission via direct lesion contact and infected oral secretions.
  • Apply the pharmacological and supportive management protocol for primary herpetic gingivostomatitis, including dosing and age-specific contraindications. High-yield: aciclovir most effective within 72–96 hours / prodromal phase — PO 20 mg/kg 5× daily, IV 10 mg/kg; paracetamol 15 mg/kg every 4–6 h; avoid 2% viscous lidocaine (overdose risk, child cannot spit) and benzocaine gel under 6 years (methaemoglobinaemia). Lower: chlorhexidine 0.2% regimens, Difflam C combination, tetracycline/minocycline rinses (>12 y); limited evidence under 2 years; Tzanck cells and exfoliative cytology for diagnosis.
  • Compare herpangina and hand-foot-and-mouth disease, which share an enterovirus aetiology but differ in lesion distribution. High-yield: both Coxsackie (HFMD also enterovirus 71), affect children up to ~10 y; herpangina = posterior oropharynx/soft palate, lesions do NOT coalesce; HFMD = more numerous, anterior intraoral involvement PLUS vesicles on palms/soles and fingers/toes. Lower: faecal-oral spread, herpangina incubation 4–7 days, onychomadesis/Beau’s lines weeks post-HFMD, documented outbreaks (Coxsackie A6/A10).
  • Describe the presentation and diagnosis of EBV infectious mononucleosis with its dental-relevant oral signs. High-yield: Epstein–Barr virus (HHV-4); palatal petechiae, oral ulcers/NUG, tonsillopharyngitis, posterior cervical lymphadenopathy; Downey cells (atypical lymphocytes) and heterophile antibody tests (Monospot, Paul–Bunnell). Lower: lifelong persistence, splenic rupture and other complications, link to Burkitt lymphoma via B-cell infection, 1964 EBV discovery history.
  • Recognise varicella (chickenpox) presentation, transmission, and immunisation status as a modifier of severity. High-yield: VZV (HHV-3); “dewdrop on a rose petal” vesicles with lesions in multiple simultaneous stages; oral ulcers on vermilion/palate; immunised children have low/no fever and milder course. Lower: 10–21 day incubation, MMRV at 18 months (Oka/Merck strain), aciclovir/valaciclovir within 24 h of rash, complications (encephalitis, pneumonia, necrotising fasciitis, secondary Group A strep).
  • Recognise the rare but serious systemic complications shared across paediatric viral orofacial infections that warrant escalation. High-yield: HSV → aseptic meningitis/encephalitis; enteroviral (herpangina/HFMD) → meningitis, encephalitis, cerebellar ataxia; triage decision = ED referral vs specialist consult. Lower: herpangina carditis/pulmonary oedema/acute flaccid paralysis, EBV myocarditis/haemolytic anaemia, varicella septicaemia/toxic shock.

L8: Dental Trauma in the Primary Dentition

  • Explain why traumatic dental injuries are common in the primary dentition and why luxation injuries predominate over fractures. High-yield: concussion, subluxation, and luxation account for ~80% of primary tooth injuries because the softer, more pliable alveolar bone in young children lets teeth displace rather than fracture; luxation (displacement) injuries are far more common than fractures. Lower: head/facial injuries = 40% of preschool somatic injuries (Glendor 1996); toddlers fall ~17 times/hour; 30% sustain primary-tooth injuries and 46% have any traumatic dental history (Andreasen & Ravn 1972).
  • Describe a systematic trauma assessment, including history, the key diagnostic questions, and clinical examination steps. High-yield: ask where/why/how/when the injury occurred (timing is critical for avulsion storage and treatment decisions), screen for loss of consciousness/nausea/vomiting (head injury → ED referral), and check for bite disturbance (“step defect” suggests alveolar/jaw fracture). Lower: calm the environment, clean the face with warm water/saline (vascular gingiva makes injuries look worse), chin-point trauma correlating with molar/condyle fractures, degloving injuries, and electrometric pulp testing.
  • Apply the appropriate radiographic protocol (“trauma series”) for the traumatised incisor region. High-yield: the trauma series = one steep occlusal exposure plus three periapical bisecting-angle exposures; steep occlusal (size 2 film, ~65° angulation) best detects lateral luxations and apical/mid-root and alveolar fractures. Lower: 2D periapical views miss fractures from angulation; size 4 ideal but size 2 works horizontally for toddlers; lateral view to assess buccal-plate perforation; Tell-Show-Do with a teddy bear; incidental mesiodens detection.
  • Classify the traumatic injuries affecting primary teeth by tissue involved and mechanism. High-yield: distinguish fractures (infraction, enamel, enamel–dentin, enamel–dentin–pulp/complicated, crown–root, root, alveolar) from luxations; uncomplicated = no pulp exposure, complicated = pulp involved. Lower: precise definitions of infraction (crack, no structure loss) and horizontal vs vertical root fracture.
  • Define and differentiate the luxation injuries by direction and degree of displacement. High-yield: concussion (no mobility/displacement, tender to touch), subluxation (increased mobility, no displacement, crevicular bleeding), extrusion, lateral luxation, intrusion, and avulsion; concussion/subluxation are the most common primary injuries. Lower: lateral luxation often accompanied by alveolar bone fracture; intrusion = displacement deeper into bone, extrusion = partial displacement out of the socket.
  • Explain the guiding principle that primary-tooth management prioritises the developing permanent successor, including why specific interventions are avoided. High-yield: management protects the permanent germ — do NOT replant avulsed primary teeth, and repositioning is discouraged in intrusion because forcing the root or an inflammatory clot toward the follicle causes permanent developmental damage; palatal displacement (toward the follicle) carries high risk while buccal displacement has a better prognosis. Lower: the two general treatment paths (conservative monitoring vs extraction) per Andersson et al. 2012.
  • Apply conservative management to concussion, subluxation, and intrusion injuries with appropriate recall scheduling. High-yield: concussion/subluxation → soft diet, analgesia, hygiene/chlorhexidine, monitoring (<10% complication risk; recall 1 week, 1, 3, 6, 12 months); intruded primary teeth → wait-and-see, with ~80% spontaneously re-erupting even at 100% intrusion. Lower: ~1/3 of intrusions develop complications (infection/ankylosis); intrusion monitoring at 1 week, 1, 3, 6, 9, 12 months; lowest pulp-necrosis risk under age 2; complications more likely over age 4 (Lauridsen 2017).
  • Determine the indications for extraction versus conservative care across luxation and fracture types. High-yield: extract for severe displacement, occlusal interference preventing closure, direct pulpal exposure, degloving injuries, and complicated (pulp-involved) crown fractures; uncomplicated crown fractures → smooth edges or composite restoration. Lower: root fractures usually extracted if the coronal fragment is highly mobile; extrusion 15–43% and lateral luxation 20–40% complication rates with higher risk over age 4 or with concomitant crown fracture; referral to a paediatric dentist for tooth-preserving options.
  • Describe the post-traumatic sequelae to the injured primary tooth and to the permanent successor. High-yield: primary-tooth sequelae include pulp necrosis (~25%), discolouration (~52%), pulp canal obliteration (yellowing), ankylosis (infra-occlusion), and resorption — discolouration does NOT always mean necrosis; permanent-successor damage includes enamel hypoplasia/defects, Turner’s tooth, crown dilaceration/discolouration, and eruption disturbance. Lower: Borum & Andreasen complication patterns (color change highest in extrusion 80%/lateral luxation; PN highest in intrusion 37.6%; PCO highest in extrusion 70%; permanent displacement mainly in intrusion 17.6%); most complications occur within the first 12 months.

W1: ICDAS & Introduction to Caries

  • Explain dental caries as a dynamic, multifactorial disease of demineralization–remineralization cycles and justify why early (pre-cavitation) detection matters. High-yield: caries is a continuous demineralization–remineralization process, not just cavitation — so detection should capture the whole spectrum, not only frank cavities. Lower: criteria for an ideal diagnostic tool (earliest-stage detection, valid across age groups, assesses lesion activity, allows monitoring); no method meets all criteria.
  • Describe the limitations of traditional qualitative caries diagnosis and the rationale for a validated scoring system. High-yield: subjective descriptors (“soft and sticky,” “brown spot,” “watch”) are poorly reproducible and drive over-/under-treatment; need for standardization. Lower: “watch” notations are ambiguous and should be replaced with a specific lesion type/score.
  • Score coronal caries using the ICDAS lesion codes 0–6 and state the visual criterion defining each. High-yield: 0 sound; 1 first visual change (only after drying, or confined to pit/fissure); 2 distinct visual change (visible when wet); 3 localised enamel breakdown/microcavitation, no dentine; 4 underlying dark dentine shadow ± enamel breakdown; 5 distinct cavity with visible dentine, <half surface; 6 extensive cavity with visible dentine, >half surface. Lower: ICDAS = International Caries Detection and Assessment System, a validated evidence-based visual system.
  • Apply ICDAS code-1 vs code-2 decision rules across surface types and the “if in doubt, score lower” principle. High-yield: smooth surface — code 1 = visible only after drying, code 2 = visible when wet; pit/fissure — code 1 = confined to pits/fissures, code 2 = extends beyond; when uncertain choose the lower code (minimal-intervention ethos). Lower: white-spot appearance arises from porosity altering light refraction; clean and dry teeth before assessment as plaque masks lesions.
  • Explain the two-digit ICDAS code structure and link lesion codes to treatment thresholds. High-yield: first digit = restoration/tooth status, second digit = lesion severity (0–6); codes 0–4 favour preventive/microinvasive management, codes 5–6 indicate operative treatment. Lower: ICDAS enables monitoring of progression/regression over time.
  • Compare visual examination with radiographic detection and define when each is most accurate. High-yield: bitewings are highly accurate for proximal lesions, especially past the DEJ, but poor for occlusal lesions (only ~33% detected) — radiographs are an adjunct. Lower: record both tooth-level and surface-level findings; clean teeth (prophy/brush/water + gauze) and dry before scoring.
  • Distinguish carious white/brown spots from non-carious opacities by pattern, location, and demarcation. High-yield: carious spot = localised, plaque-associated; fluorosis = diffuse, symmetrical, generalised; MIH = well-demarcated opacities on first permanent molars/incisors; Turner’s tooth = localised single-tooth defect from prior trauma/infection to the primary predecessor. Lower: distribution across the dentition and tooth location (cervical, incisal third, palatal cusp, cusp tip) are key clinical clues; do not confuse attrition/abrasion (tooth surface loss) with caries.
  • Define MIH and HSPM and list their EAPD-style diagnostic features. High-yield: MIH = systemic hypomineralization of ≥1 first permanent molars ± incisors; HSPM = same affecting second primary molars; diagnostic features = well-demarcated opacities (white→yellow→brown), post-eruptive enamel breakdown (PEB), atypical restorations, atypical caries/extractions. Lower: prevalence ~1 in 7 (MIH) and ~1 in 10 (HSPM); yellow/brown opacities indicate poorer mineralization and higher PEB risk.
  • Classify and record developmental enamel defects, distinguishing MIH/HSPM from other (non-MIH/HSPM) categories. High-yield: non-MIH/HSPM categories = diffuse opacities (fluorosis), hypoplasia/chronological defects (quantitative enamel loss), amelogenesis imperfecta (hereditary, whole dentition), localised hypomineralization (Turner’s tooth). Lower: for opacities record the most severe colour (brown > yellow > white); record both PEB and the relevant ICDAS code (often 5 or 6) when cavitation coexists.
  • Apply practical recording rules for scoring in clinical and field/epidemiological settings. High-yield: in field surveys focus on ICDAS 3+ because codes 1–2 require reliable cleaning and drying; do not score exfoliated teeth, non-rateable surfaces, or non-carious tooth surface loss. Lower: score both tooth and surface; PEB occurs in low-caries-risk sites (cusps, palatal surfaces) with rough irregular margins; calibration via case-based scoring exercises.

W2: Caries Risk, Spread & Prediction

  • Describe the contiguous (adjacent-surface) spread of proximal caries in the primary dentition and its clinical implication. High-yield: 69% of primary teeth with proximal caries developed caries on the adjacent proximal surface — assume at least a “white spot” lesion on the contacting neighbour until proven otherwise. Lower: Dean et al. 1997, “Progression of interproximal caries in the primary dentition,” J Clin Pediatr Dent.
  • Explain cross-quadrant progression of proximal caries and why one lesion mandates examining the whole mouth. High-yield: 89% of patients with a proximal carious lesion on a primary tooth in one quadrant developed another primary molar proximal lesion in a different quadrant — assume proximal caries seen in one quadrant is occurring elsewhere. Lower: Dean et al. 1997.
  • Predict permanent-dentition caries risk from primary-dentition caries experience. High-yield: children with primary-tooth caries were ~3× more likely to develop permanent caries (RR 2.6, 95% CI 1.4–4.7); primary molars carried the highest predictive value at 85.4%, making molar caries a stronger predictor than incisor caries. Lower: Li & Wang 2002, 8-year cohort of 362 children.
  • Apply the second-primary-molar → first-permanent-molar relationship to preventive decision-making. High-yield: distal caries on a second primary molar raises caries risk on the mesial of the first permanent molar by 15× — manage actively with restoration or SDF to protect the erupting/erupted 6. Lower: case-based discussion material.
  • Interpret the MIH–caries association and quantify the increased caries risk. High-yield: children with MIH are 5.89× more likely to have a DMFT > 0 (95% CI 2.69–12.88, P < 0.05), with groups balanced for age, gender, and primary caries experience. Lower: Americano et al. 2016, case-control study, ages 7–11.
  • Identify the false MIH risk statement commonly tested. High-yield: the “8× more likely to develop caries” claim is FALSE; the correct, evidence-based figure is 5.89× for DMFT > 0. Lower: distractor item Q39, statement 4.
  • Explain why MIH teeth are intrinsically caries-prone and how to manage them as high caries risk. High-yield: porous enamel with post-eruptive breakdown creates plaque-retention factors and sensitivity (poor brushing) — treat all MIH children as high caries risk with high-strength fluoride toothpaste, fissure sealants, and possibly mouth rinses. Lower: a unilateral plaque/calculus pattern often flags a painful tooth on the avoided side.

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