Quiz 2
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MCQ
- What happens when the occlusal plane is too high
- the patient will have difficulty moving the food bolus and excessive tongue movements will disolage the dentures
Quiz 3
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[l6_saq_02] The occlusal plane is defined as the imaginary plane established by the incisal and occlusal surfaces of the teeth. The two major anatomical lines used to orient the occlusal plane are the Interpupillary Line and Camper’s Line. At least three factors that affect the attainment of Bilateral Balanced Occlusion are: Incisal Guide Angle, Condylar Guidance, Compensating curves (antero-posterior & transverse), Orientation of occlusal plane, Cuspal Inclination. The primary function of introducing compensating curves into the occlusion is that they compensate for the space (known as Christensen’s Phenomenon) formed between the posterior occlusal surfaces during eccentric (translatory) mandibular movements.
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[l4_mmr_saq_03] The key relationships are:
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Vertical Jaw Relationships: Rest Vertical Dimension (RVD) and Occlusal Vertical Dimension (OVD), which are used to determine the Interocclusal Clearance (Freeway Space).
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Horizontal Jaw Relationships: Retruded Contact Position (RCP), Intercuspal Position (ICP), and Eccentric Jaw Relations (Protrusive, Left & Right).
These are important because they are critical for the functional and aesthetic success of the dentures, have biological and biomechanical implications, and are necessary to mount casts and program an articulator to simulate the patient’s mandibular movements.
Quiz 4
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Quiz 5
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MCQ:
- During a trial insertion, the clinician checks phonetics by having the patient make ‘f’, ‘v’, and ‘ph’ sounds. This is an excellent test for determining the:
A. Correct Occlusal Vertical Dimension (OVD).
B. ==Proper plane of occlusion and placement of the upper anterior teeth.
C. Adequacy of the posterior palatal seal.
D. Correct channel space between the tongue and palate for ‘s’ sounds.
Correction
A comprehensive summary on sounds on anki!
- Gerbered tapered baseline = incisal edge contour
- A pronounced, sharp curvature
**To Correct: have to heavily review anterior Tooth Selection! ** The same problem exists for SAQ 1 “What factors regarding form proportion and contour”
SAQ
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What factors are considered for anterior tooth mould selection, specifically regarding form, proportion, and contour Anterior Tooth Selection REVIEW
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- I think that went well, not to horrible, there are some differences to reveiw Though!
- went very well but I need to figure out what the 3 different methods are!
Quiz 6
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SAQ
What are all the occlusal schemes and which ones are recommended The sources list the following complete denture occlusal schemes:
- Bilateral Balanced
- Lingualised
- Canine Guidance
- Group Function
- Monoplane
Details on Occlusal Schemes
The different schemes are described based on the contacts they establish, particularly in eccentric movements:
1. Bilateral Balanced
This scheme involves the bilateral, simultaneous posterior occlusal contact of teeth in the maximal intercuspal position and during eccentric positions. This type of balanced occlusion is considered unique to complete dentures, as it does not naturally occur with natural teeth.
Factors that affect achieving a balanced occlusion include:
- Incisal Guide Angle.
- Condylar Guidance.
- Compensating curves (both antero-posterior and transverse).
- Orientation of the occlusal plane.
- Cuspal Inclination.
A steep condylar path necessitates a steep compensating curve for occlusal balance. Furthermore, a steep incisal guidance requires posterior teeth with steep cuspal inclines, a steep occlusal plane, and a steep compensating curve to achieve occlusal balance.
Bilateral balanced schemes are particularly needed for patients who present with loss of stability and retention (categorised as PDI III and IV).
2. Lingualised
This form of denture occlusion articulates the maxillary lingual cusps with the mandibular occlusal surfaces in centric occlusion, as well as in working and nonworking mandibular positions.
3. Canine Guidance
Also described as a form of mutually protected articulation, canine guidance ensures that the vertical and horizontal overlap of the canine teeth disclude the posterior teeth during excursive movements of the mandible.
4. Group Function
This scheme involves multiple contact relations between the maxillary and mandibular teeth in lateral movements on the working-side. In this arrangement, simultaneous contact of several teeth acts as a group to distribute occlusal forces.
5. Monoplane
In a monoplane occlusal arrangement, the posterior teeth have masticatory surfaces that lack any cuspal height. In terms of cuspal inclination, these are referred to as Non-anatomical (0°) teeth.
General Considerations
While there are multiple schemes, the average denture patient who has good residual ridges and no neuromuscular problems will function adequately with a properly fabricated complete denture, regardless of the occlusal scheme used. However, some support exists for increased alveolar bone loss when complete dentures have a non-balanced occlusion. There is no strong evidence either supporting or opposing bilateral occlusal schemes regarding patient satisfaction, chewing ability, or preference.
SAQ: Descrbe the impact of edentulism on masticatory function and bite strength Edentulism leads to impaired mastication by reducing bite strength and masticatory force to about one-fifth to one-quarter of that of a dentate individual. Consequently, complete denture wearers require seven times more chewing strokes to process food, and the condition is also associated with muscular atrophy.