CD Test Flashcards
Fovea palatini in relation to vibrating line?
- Anterior
- Posterior
- Along the vibrating line
- Doesn’t exist
Posterior
Which doesn’t exist in House Classification?
- Hysterical
- Indifferent
- Philosophical
- Hostile
Hostile
What is the diameter of the sphere of Monson?
4 inches
8 inches
4 cm
8 cm
8 inches
Which one is not a stage?
Dough-like
Sandy
Stringy
Sticky
Sticky
What is the space between the dorsal surface of the tongue and the palate, at rest position?
Space of Donders
Masticatory space
Space of bolus
Space of Bonwill
Space of Donders
What is the ratio of the loss of height of maxilla to mandible, over 7 years without denture?
1:4
1:3
3:1
4:1
1:4
Mandible resorption compared with maxilla. Over 25 years with denture?
2x
4x
6x
8x
2x
What are the suprahyoid muscles that limit the lingual denture flange?
Geniohyoid and mylohyoid
Which muscle is not attached to the retromolar pad?
Buccinator
Temporalis
Masseter
superior constrictor muscle
Masseter
Denture stomatitis what medicine?
Miconazole
Hydrocortisone
Augmentin
Miconazole
What is the name of the curve from tip of lower canine passing through cusp tips of posterior teeth and arcs through condyle?
Compensating Curve
Curve of Spee
Curve of Monson
Curve of Spee
Which is true?
Decreased curve of spee = Shorter cusp height
Decreased curve of spee = Taller cusp height
Decreased curve of spee = fossa of mandible and ridge orientates more mesially
Decreased curve of spee = fossa of mandible and ridge orientates more distally
Decreased curve of spee= Shorter cusp height
Most severe and adverse effect of denture adhesives?
Zinc neurotoxicity
Xerostomia
Denture stomatitis
Tissue inflammation
Zinc neurotoxicity
What is the most common cause of allergic reaction to denture base?
Excess monomer
Polymethyl methacrylate
Candida
Excess monomer (Methyl methacrylate)
Most common cause of food trap at the lower buccal vestibule?
Thickness of flange
Border moulding
Slope of flange
Festooning of flange
Slope of flange
Buccal shelf - What’s true?
Bound externally by the external oblique line and internally by the slope of the ridge
Secondary stress-bearing area
Anatomical guide for the lateral border of flange
Bound externally by the external oblique line and internally by the slope of the ridge
Loss of vertical dimension will cause the mandible to?
Move backwards in relation to maxilla
Move forward in relation to maxilla
No effect
Irregular movement
Move forward in relation to maxilla
Which impression technique for sharp ridge?
Selective pressure
Extra pressure
Minimal pressure
All of the above
Minimal pressure
What’s the importance of Heberden’s nodes?
Makes it difficult for the patient to insert and clean denture
Difficult to take final impression for mandibular arch
Increase chance of ulceration of mandibular residual ridge
Makes it difficult for the patient to insert and clean denture
Torus must be surgically removed when?
The patient is cancerphobic and psychologically scared of it
Extends too palatally until it impinges on the posterior palatal seal
Has undercuts
All of the above
All of the above
How much of normal function does complete dentures give?
10%
30%
80%
50%
30%
Which one doesn’t affect balanced articulation?
Cusp length
Inter-condylar guidance
Inclination of occlusal plane
Compensating curve
Inter-condylar guidance
Why is balanced occlusion needed?
It isn’t
Facilitate eccentric movements
Reseats the denture when unilateral force is removed
Aesthetics
Facilitate eccentric movements
What is the main retention force of maxillary complete denture?
Peripheral Seal
Adhesion
Cohesion
Atmospheric pressure
Peripheral Seal
Position of lateral border of tongue at rest position?
Slightly below occlusal plane
Well above occlusal plane
Just above occlusal plane
In line with occlusal plane
Just above occlusal plane
Most compressible mandibular area in your opinion?
Buccal shelves
Alveolar ridge
Retromolar pad
Premylohyoid region
Retromolar pad
Which palatal throat form is favourable for a maxillary denture?
Class I
Class II
Class III
Does not affect retention
Class I
Whistle syndrome
Change palatal contour to block airway
Smoothen the palatal slopes
Move anterior teeth down
Move posterior teeth lingually
Smoothen the palatal slopes
What should be the relationship of teeth and tongue in producing the ‘t’ and ‘d’ sound?
Tip of the tongue touches the lingual surface of incisor and anterior palate
Which of the following is true about maxillary incisor exposure?
Increases with age
Decreases with age
Remains the same
Decreases with age
Which letter pronunciation is most important in complete dentures?
s
t
v
p
s
Which anatomical feature determines the posterior extension of mandibular denture?
Bone
Muscle
Ligament
Soft tissues
Soft tissues (2/3 Retromolar pad)
Denture mandibular movement compared to natural teeth?
Same
Very different from natural
More irregular than natural
Less irregular than natural
Same
Patient with loose denture and soreness. What is the most important thing to do?
Check occlusion
Use denture adhesive
Trim soreness spots on denture
Retake impression
Check occlusion
Why ‘s’ sound like ‘sh’?
Too large a space between the tongue and palate
Too narrow space between tongue and palate
Obstructed space
Too narrow space between tongue and palate
How to minimise denture processing errors?
Remount and adjust occlusion intraorally
Remount and wait one week before adjusting
Remount and wait one week before adjusting
What makes denture teeth look bigger and brighter?
Using a lighter shade
Set up more buccally
Set up more lingually
Using a lighter shade
How to adjust the maxillary occlusal rim on an articulator?
Arbitrarily
Incisal pin
Facebow
Facebow
Which one is for recording CR?
Gothic arc tracing
Wax
Facebow
Gothic arc tracing
Patient’s head position when recording RVD?
Supine
Upright and unsupported
Upright and supported by a headrest
Doesn’t matter
Upright and unsupported by a headrest
What is the most important retentive force for maxillary complete denture?
Adhesion
Cohesion
Undercuts
Border seal
Border seal
Someone set up posterior teeth edge to edge. What happens?
No answer lol
Tipping of denture in function?
What are the 8 components of the Prosthodontic Diagnostic Index for edentulous patients?
- Residual ridge height
Class III: 11-15mm
- Residual ridge morphology
Class III: Minimum influence to resist horizontal and vertical forces
- Muscle attachments in the mandible
Class III: Moderate influence of denture stability and retention
- MMR (Class I,II,III)
- Conditions requiring pre-prosthetic surgery
- Limited inter-arch space (18-20mm)
- Tongue anatomy
- Modifiers
TMD symptoms present or Hyperactive gag reflex
According to Keng et al, distance of maxillary incisor from incisive papilla?
7.52mm
8.52mm
9.52mm
10.52mm
8.52mm
Patient present with:
- Reduced lower facial height, with the appearance of over-closure
- Marked circumoral activity during swallowing
- Acute labiodental groove, low Frankfort mandibular plane angle
- Square gonial angle and prominent zygoma
Class I
Class II div 1
Class II div 2
Class III
Class II div 2
Adhesion is?
Chemical attraction
Physical attraction between like molecules
Physical attraction between unlike molecules
Physical attraction between UNLIKE molecules
Define posterior palatal seal
The soft tissue area at or beyond the junction of the hard and soft palates on which pressure within physiologic limits can be applied by a removable complete denture to aid in its retention.
Functions of Posterior Palatal Seal
- Achieving an airtight seal between the denture and the hard and soft palate tissues.
- Enhance the retention of the denture by utilizing atmospheric pressure, preventing dislodgment during functional activities like eating and speaking.
- Contributes to the even distribution of forces across the denture-bearing area, improving comfort and reducing tissue irritation.
Explain the problems with overextension of the posterior palatal seal.
Impaired Seal and Retention: Overextension of the seal can disrupt the proper sealing effect and compromise retention.
Tissue Irritation: Overextension of the posterior palatal seal can cause irritation and discomfort to the soft palate and the surrounding tissues, making it difficult for the patient to wear the denture comfortably.
Difficulty in Speech and Swallowing: Overextension can interfere with normal movements of the soft palate during speech and swallowing, leading to difficulties in pronunciation and impaired swallowing function. The patient may experience gagging or choking sensations.
Three philosophies of impression taking technique
- Mucostatic Technique:
Aims to record the soft tissue structures in a relaxed or undisturbed state
Procedure:
- The impression material is carefully loaded into the tray and placed in the mouth without putting pressure on the tissues.
Purpose:
- Captures the soft tissue structures in their natural, at-rest position.
- Provides an accurate representation of the mucosal tissues at rest.
- Mucodisplacement Technique: Involves displacing the soft tissues to create space for the impression material to capture an accurate impression of the underlying structures.
Procedure:
- Pressure is applied to displace the soft tissues and create a larger space for the impression material to flow and record the tissue details effectively.
- Displacement may be achieved using specific trays or special tray designs that apply pressure to displace tissues.
Purpose:
- Allows for more precise capture of tissue details by displacing soft tissues that may impede accurate impressions.
- Selective Pressure Technique:
Involves applying pressure selectively to specific areas of the tray to influence the displacement of soft tissues
Procedure:
- Pressure is applied selectively to specific areas of the tray to displace tissues in a controlled and strategic manner.
- The pressure points are carefully determined based on the individual patient’s anatomical and functional considerations.
Purpose:
- Provides a controlled displacement of tissues, optimizing the impression accuracy in critical areas.
- Helps achieve improved adaptation and retention of the prosthesis.
