Quartz 4

Denture Review Appointment Reference

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Denture Review Appointment Reference

Rough draft

Rough overview assembled the night before a denture-fit review. Lecture- and reference-note derived; the McCracken chapters listed in Related Readings were not pulled into this draft (PDF reader failed locally) — verify the hygiene and reline detail against McCracken Ch 2, 21, 22 before relying on it clinically. Unfinished: true.

Overview

A chairside quick-reference for reviewing a patient’s existing denture. Three parts:

Scope: applies to both RPDs and complete dentures, with RPD-specific items called out. Confirm prosthesis type before applying section 2’s framework-specific checks.

1. Patient hygiene & care instructions

Verify against McCracken Ch 2 / Ch 21

Daily-care content below is standard-of-care synthesis, not yet cross-checked against the textbook. Check Form 24 (denture FAQs handout, kept in Clinic 1 per [[Denture Revision Session 2]]) for the OCHWA-issued patient version.

Daily cleaning

  • Brush after every meal (or at minimum morning + night) over a basin of water or folded towel so the denture won’t shatter if dropped.
  • Use a soft denture brush or soft toothbrush — never a hard-bristled brush.
  • Mild soap, dish soap, or denture-specific paste. Regular toothpaste is abrasive and scratches acrylic → bacterial retention sites.
  • Clean both fitting (tissue) surface and polished surface.
  • Don’t forget to brush the mouth too: residual ridge, palate, tongue, remaining teeth. Soft brush for edentulous areas.

Soaking

  • Soak daily in a denture-cleaning solution (alkaline peroxide tablets — e.g. Polident, Steradent) for the duration on the packet (usually 15 min or overnight).
  • For dentures with metal components (RPD framework, clasps): use products labelled safe for metal — straight hypochlorite/bleach corrodes CoCr.
  • Chlorhexidine 0.2 % soak if denture stomatitis suspected (with concurrent antifungal if Candida confirmed). Short-term; stains acrylic with prolonged use.
  • Rinse thoroughly before reinserting.

Overnight wear

  • Remove at night — the gold-standard advice. Tissue rest reduces denture stomatitis risk and gives mucosa recovery time.
  • Store in water or denture-soak solution (not dry — acrylic can warp/become brittle when dehydrated).
  • If patient sleeps with denture in (some can’t tolerate removing socially), still aim for a several-hour rest period each day.

Diet & break-in

  • Start with soft foods, cut small.
  • Chew bilaterally — distributes load and improves stability (especially Kennedy I/II mandibular RPDs).
  • Avoid very hot food/drink immediately — reduced thermal sensitivity through acrylic.
  • Avoid sticky/hard foods initially.

Mucosal care & warning signs

  • Inspect mucosa daily — redness, ulceration, white patches.
  • Denture stomatitis red flags: diffuse erythema under the fitting surface, often asymptomatic. Common causes: continuous wear, poor hygiene, Candida.
  • Come back if: persistent sore spot >48 h, denture loose, fractured tooth/clasp/base, ulcer not healing in 10–14 days, burning sensation.

Recall expectations

  • Post-insertion review: 24–48 h after a new denture or major adjustment.
  • Sore spots are normal for the first 1–2 weeks; significant pain is not.
  • Routine review: annually for fit/occlusion/oral cancer screen.
  • Relines typically considered at 1+ year of wear, sooner if extraction/resorption.

2. Assessing denture fit

See [[Summary Evaluating Denture Fit]] for the verbatim lecture-derived checklist. Below is the working sequence at the chair.

History first

  • Age of denture (years of wear → wear/resorption expectation).
  • Chief complaint — pain, looseness, food trapping, aesthetic, speech.
  • What changed recently? New medication (xerostomia drugs), weight loss, recent extraction.
  • When does the problem occur? Eating (occlusion/extension), all the time (retention/stability), specific food (occlusal interference).
  • Patient satisfaction and expectation realism.

Extraoral

  • Lip support, vertical dimension (closest-speaking-space check, freeway space ~3 mm).
  • Symmetry, commissure position, drooping (over-closed VDO).

Intraoral — denture out

  • Soft tissue: ridge inspection, mucosa, frena, tori, sulcus depth.
  • Look for denture stomatitis outline matching denture-bearing area.
  • Check denture itself: cracks, worn teeth, calculus, debris, broken clasps, distortion.

Intraoral — denture in

Retention (resistance to vertical displacement)

  • Maxillary: try to pull denture down from anterior. Check posterior palatal seal (“ah” line — vibrating line at hard/soft palate junction). Check buccal/labial flange seal.
  • Mandibular: lift from anterior. Confirm flanges aren’t over-extended into muscle attachments (mylohyoid, buccinator, mentalis displace the denture in function).
  • RPD: confirm clasp terminal-third engagement of the planned undercut.

Stability (resistance to horizontal/lateral force)

  • Apply A-P and lateral force to denture. Significant rocking or shift = unstable.
  • Press alternately on each side of the occlusal table — denture shouldn’t tip up on the opposite side.
  • RPD: press on a rest seat — opposite side should not lift (if it does, framework isn’t fully seating or there’s distortion).

Support (load distribution to tissues)

  • Pressure-indicating paste (PIP) or fit checker spray on the fitting surface:
    • Seat denture under firm finger pressure on rests (RPD) or under bite force (complete denture).
    • Areas where paste is wiped through to acrylic = high-pressure points → relieve with acrylic bur.
    • Even, light paste film = appropriate tissue contact.
  • Tissue blanching under load = excessive support pressure → relieve.

Extensions

  • Sulcus should be filled but flanges 1–2 mm clear of frena.
  • Posterior maxillary: confirm coverage to vibrating line, not past it (gagging).
  • Posterior mandibular: pterygomandibular raphe medially, retromolar pad coverage, mylohyoid muscle accommodation lingually.

Occlusion

  • Articulating paper in centric: bilateral simultaneous contact, no sliding.
  • Tap-tap-tap test — sliding pattern = premature contact on that tooth.
  • Lateral excursions: balanced occlusion ideal for complete dentures (working + balancing contact). RPDs: group function / mutually protected acceptable.
  • Protrusion: posterior contact during protrusion (Christensen’s phenomenon compensation).
  • Long streaks on articulating paper = interferences.

Phonetics

  • F / V / Ph: lower lip should contact maxillary incisal edges → confirms incisor position.
  • S sounds: assesses OVD and tongue space.
    • Whistle = teeth too close / tongue space insufficient.
    • Lisp = too much vertical/horizontal space between incisors.
  • M sounds: rest position check.

Aesthetics

  • Midline within ±2–4 mm of facial midline.
  • Incisal display: 2–4 mm at rest, full crown on smile.
  • Buccal corridor present (not too narrow → “denture look”; not too wide → unsupported lips).
  • Tooth shade, shape, position appropriate to age/face.

RPD-specific

  • Framework seating — all rests fully seated; no rocking on rest seats.
  • Clasp passivity — clasps don’t exert force in seated position; only engage on attempted dislodgement.
  • Reciprocation — reciprocal arm contacts tooth at the moment terminal third engages undercut.
  • Indirect retainers — seated when distal extension loaded? Lift test on free-end.
  • Guide planes — proximal plate contact along full length.
  • Major connector — no soft-tissue impingement, adequate relief over tori/raphe.

Summary table (from [[Summary Evaluating Denture Fit]])

CharacteristicMethodSuccess indicator
AgePatient historyKnowledge of wear/resorption timeline
StabilityApply horizontal/lateral forceMinimal denture movement
OcclusionArticulating paper, observe closureBilateral simultaneous contact
AestheticsVisual inspection lip support / midlineHarmony with face
RetentionVertical displacement attemptResistance to pulling
PhoneticsRepeat S / F soundsClear, no whistle / lisp
ExtensionsVisual check sulcus / frenaFull coverage without impingement

3. Common chairside procedures

3a. Clasp adjustments

When

  • Insufficient retention — clasp not engaging undercut, terminal third sprung open.
  • Excessive retention — patient struggles to remove; tipping abutment on removal.
  • Framework not seating fully — interference somewhere.
  • Rocking / tipping under load.

Tools

  • Wrought-wire clasp: three-prong pliers (Adams pliers) — bend incrementally.
  • Cast clasp (CoCr): small adjustments only, with contouring pliers. Cast clasps work-harden fast and fracture — minimise iterations.
  • High-speed cylindrical carbide bur for relieving framework metal where it interferes with seating.
  • PIP / fit-checker spray to identify interferences.

Adjustable vs untouchable areas

Terminal-third rule

The final 1/3 of the retentive arm (the tip below the height of contour) is the only part that retains. Grinding it destroys retention permanently and risks fracture. Never touch it with a bur. Bend it only with pliers, gently, to increase or reduce undercut engagement.

Adjustable with bur:

  • Minor connector
  • Reciprocal arm (entirely above height of contour)
  • Proximal 2/3 of the retentive arm (shoulder and midsection, above height of contour)

Bendable with pliers (wrought wire / very limited on cast):

  • Terminal third — small, controlled bends to alter undercut engagement

Undercut depth by material (don’t force a clasp into the wrong depth)

MaterialDesigned undercut
Cast Cr-Co0.25 mm
Cast gold0.50 mm
Wrought stainless steel wire0.75 mm

Forcing CoCr into a deeper undercut → plastic deformation → permanent retention loss.

Procedure

  1. Apply PIP/fit-checker to fitting surface.
  2. Seat framework with finger pressure on rests.
  3. Identify interferences (paste wiped through; perforations in light-body).
  4. Relieve interference with carbide bur — above height of contour only.
  5. Reseat and recheck.
  6. Once fully seated, assess retention/stability separately and adjust terminal third with pliers if needed.
  7. Stop iterating early — cold-working fractures clasps.

If interference is gross or framework distorted, new impression + framework rather than continued grinding.

3b. Relines

Indications

  • Poor tissue adaptation over alveolar ridge (gap, food trapping under base).
  • Ridge resorption — typically considered from ~1 year of wear, sooner post-extraction.
  • Distal-extension settling (Kennedy I and II) — classic indication; often signals altered-cast technique not used or has since needed updating.
  • Loss of retention attributable to tissue surface (not clasp).

Contraindications / when to remake instead

  • Denture <1 year old and no resorption — find the actual problem ([[Denture Revision Session]]: “you NEED to know the actual reason” — example: combination syndrome, overextension, tongue atrophy).
  • Occlusion is significantly off — relining preserves a bad occlusion. Remake or remount.
  • Framework distortion — reline won’t fix bent metal.
  • Severe resorption with grossly inadequate base extension — remake.

Hard reline (acrylic, replaces fitting surface)

  • Chairside: self-cure acrylic added to fitting surface in mouth. Faster, but heat/monomer exposure and less precise.
  • Lab: PVS or ZOE wash impression sent to lab; denture returned in 1–2 days with processed acrylic reline. Preferred for accuracy.

Soft reline (tissue conditioner — silicone or plasticised acrylic)

  • For inflamed, ulcerated mucosa that needs time to heal before a definitive impression.
  • Temporary — typically replaced every 1–2 weeks; deteriorates faster.
  • Also useful for patients with thin atrophic mucosa requiring permanent soft lining (lab-processed silicone).

Critical technique (from [[L9 Clinical Sequence]] and [[Removable Partial Dentures Overview]])

  • Material: PVS (preferred) or ZOE wash.
  • Finger pressure on rests only — never on the saddle. Pressing the saddle compresses tissue and falsifies the fit.
  • Functional movements: retract cheeks/tongue, patient tongue movements during set, to capture tissues in function (mimics altered-cast technique).
  • Bite registration BEFORE pickup impression — the denture often comes out with the pickup impression; without a separate bite record the relationship is lost.
  • Pickup impression: alginate in stock tray over the denture-in-wash, after the bite is recorded.

Chairside reline — step-by-step

Web-sourced content

The detail in this subsection (procedure steps, material handling, soft-reline product specifics) is drawn from web sources (manufacturer IFUs and general dental articles, listed at end of section) and not yet cross-checked against McCracken Ch 22 or a peer-reviewed source. Replace with comprehensive sources (McCracken, Carr & Brown; Phoenix’s Stewart’s Clinical Removable Partial Prosthodontics; product-specific IFUs from OCHWA inventory) before relying on it for clinical decisions.

Indications for chairside (vs lab) reline

  • Patient cannot be without their denture (single denture, no spare; social/occupational need).
  • Time-pressured fix; spare denture used as backup.
  • Minor adaptation issues where final dimensional accuracy is less critical.
  • Tissue conditioning needed before a definitive lab reline (soft chairside as an interim).

Indications for lab reline instead

  • Maximum longevity wanted; stable occlusion and VDO to preserve.
  • Hygiene-sensitive patient (lab-processed acrylic has a glossier intaglio → cleans better).
  • Significant ridge resorption requiring careful border moulding.
  • Avoiding intraoral exothermic/monomer exposure (sensitive mucosa, gag reflex).

Chairside hard reline — procedure (general protocol)

  1. Assess — confirm reline is the right answer; occlusion stable, framework not distorted, no remake indication.
  2. Pre-relieve the intaglio ~1 mm with an acrylic bur — gives reline material room to flow into a uniform layer (uneven thickness = uneven cure stress).
  3. Protect the cameo (polished) surfaces — silicone gel, petroleum lubricant, or medical tape over teeth and polished flanges to prevent reline material adhering where it shouldn’t.
  4. Apply primer / bonding agent to the prepared intaglio (supplied with the kit — monomer or organic solvent; swells the substrate resin to improve bond strength).
  5. Mix and apply the chairside reline material (auto-mix cartridge for many newer products) to the intaglio.
  6. Seat in the mouth — finger pressure on rests (RPD) / even bite force (complete denture). Border-mould with cheek/lip/tongue movements while material is still flowable.
  7. Allow set / cure intraorally for the manufacturer-specified time (typically 3–5 min). Remove and reseat once or twice during early set to prevent lock-in in undercuts.
  8. Remove, trim, and finish — gross excess with acrylic bur, then progressively finer for the periphery; polish where the new material meets cameo surface.
  9. Reseat and check retention, stability, occlusion, extensions. Articulating paper to confirm centric is unchanged.
  10. Patient instructions — leave in place 24 h if possible to allow full cure / settling; review 24–48 h.

Chairside soft reline — procedure (general protocol)

  • Same prep and intaglio relief.
  • Soft-reline materials are typically silicone-based (vinyl polysiloxane chemistry) and bond chemically to acrylic via a primer.
  • Indications:
    • Sharp residual ridges with thin overlying mucosa (cushioning).
    • Flabby ridges (compressible mucosa) — reduces transient pressure peaks.
    • Atrophic mucosa, knife-edge ridge.
    • Tissue support during implant healing.
    • Reducing pressure spots that can’t be relieved by adjustment alone.
  • Apply, seat, border-mould, allow set per product (typically 5–10 min).
  • Trim with sharp scalpel / silicone-trim bur — don’t try to polish silicone with acrylic burs.
  • Lifespan: chairside soft liners last weeks to ~18 months depending on product, hygiene, and parafunction. Plan for replacement.

Tissue conditioners (a special case of soft reline)

  • Plasticised acrylic resins (e.g. PMMA + ethanol + plasticiser).
  • Plastic flow for 24–36 h after mixing — actively adapts to changing tissue shape, useful for ulcerated / inflamed mucosa.
  • Truly temporary — days to a few weeks; replace at each review.
  • Use case: inflamed mucosa under an ill-fitting denture → tissue-condition for 1–2 weeks → re-evaluate → definitive reline (lab) or remake.

Hard vs soft chairside — when to pick which

SituationChoice
Stable mucosa, simple fit improvement, longevity wantedChairside hard (or refer for lab hard)
Sharp ridge / flabby ridge / atrophic mucosaChairside soft
Inflamed / ulcerated mucosa needing healingTissue conditioner first
Combo — bulk adaptation + cushioning over sharp areaHard-soft double reline (hard bulk + soft over the sensitive area)

Pitfalls of chairside relines (vs lab)

  • Voids / porosity in the cured acrylic — bond failure spots, plaque traps.
  • Colour mismatch with the original denture base — aesthetic compromise.
  • Intraoral exotherm — warn patient; cool with air spray; avoid for compromised mucosa.
  • Monomer exposure — taste, transient mucosal irritation; not for known acrylic-monomer allergy.
  • Inferior physical properties vs lab-processed — wears faster, more porous. Treat as interim where possible.

Web sources used for this subsection (replace later)

3c. Occlusal adjustments

InterferenceCorrection
Centric prematurityDeepen fossa or increase cusp incline — don’t grind cusp tip
Working-side interferenceGrind buccal upper cusp ridges + lingual lower cusp ridges
Non-working (balancing) interferenceSame surfaces as working, aiming for simultaneous contact
Protrusive interferenceReduce distal slopes of upper + mesial slopes of lower
Open bite in edentulous areaMinor → chairside; significant → pickup impression + lab remount
High OVD (anterior premature contact, open bite)Pickup impression + lab remount on articulator

Articulating paper as the diagnostic — long streaks = interferences.

Open questions / to refine later

  • Confirm whether the patient is RPD or complete denture; adjust framework-specific section accordingly.
  • Locate Form 24 (denture FAQs handout) in Clinic 1 — attach as a wikilink once filed.
  • Pull McCracken Ch 2 / Ch 21 / Ch 22 detail when the PDF reader is working — particularly PIP procedural detail and reline material selection criteria.
  • Replace web-sourced chairside reline subsection (section 3b → “Chairside reline — step-by-step”) with comprehensive sources — McCracken Ch 22, Stewart’s/Phoenix RPP, OCHWA-inventory product IFUs. Current content is general dental-web articles and manufacturer IFUs; adequate for orientation, not for clinical authority.
  • Add a section on denture adhesive advice (use, overuse warning) — not covered here.
  • Pediatric / special-needs considerations — out of scope for this draft.
  • Photo references for clasp anatomy thirds (S/M/T) — see [[L4 Clasp Assembly]].

Graph View