Is frequently contoured labial to the ridge in the anterior region

Is frequently contoured lingual to the ridge in the anterior region

Is frequently contoured labial to the ridge in the premolar region

Is frequently contoured lingual to the ridge in the premolar region

Is slightly labial to the residual ridge in the molar region

Is usually parallel to the interpupillary line

Is at height that accommodates the length of the natural tooth plus the amount of bone reduction

Is usually parallel to the upper lip contour

The pattern of bony reduction is ignored

Doesn’t take into account the interpupillary line

The incisive papilla:

Appear to occupy a stable locale on the palate

Clinical and anthropometric measures indicate that the incisal edges of the maxillary central incisors are 8- 10 mm anterior to the center of the incisive papilla

Clinical and anthropometric measures indicate that the incisal edges of the maxillary central incisors are 4- 5 mm anterior to the center of the incisive papilla

Doesn’ t have a stable position on the palate

The papilla location is not used for central incisor positioning

*Tooth loss will have a pronounced effect on the appearance of the lips and adjacent tissues:

There is a noticeable shortening/ thinning of the lips

There is a noticeable lengthening of the lips

The lower part of the face is not affected

The effect of the degenerative changes in the skin are not obvious

In some approaches to occlusal plane determination:

The starting point for establishing the occlusal plane is the maxillary occlusion rim

The occlusal plane, posteriorly, is made to parallel the ala-tragus line

The incisal plane is parallel to the lower lip line

The incisal plane is parallel to the ala- tragus line

The occlusal plane, posteriorly, is parallel to the interpupillary line

The most frequently used tests in establishing the correct VDO by means of occlusion rims are:

Visual observation of the space between the rims when mandible is in physiological rest position

Phonetic test that include the “S” sound enunciated accurately and repeatedly

Judgement of the denture stability

Judgement of the support- bearing areas

The “ free- way space” :

Is the difference between the mandible physiological rest position dimension and the VDO

Is usually 2- 4 mm when observed at the position of the first premolars

Is usually 6- 8 mm when observed at the position of the first premolars

Is usually 2- 4 mm when observed at the position of the central incisors

The mandible physiological rest position coincides with the VDO

Phonetic tests of the vertical dimensions:

When correctly placed, the lower incisors should move forward to a position nearly directly under and almost touching the upper incisors

If the anterior teeth touch when “ch”, “s” sounds are made, the VDO is too great

If the anterior teeth touch when “ch”, “s” sounds are made, the VDO is too small

If the teeth click together during speech, the VDO is too small

When correctly placed, the lower incisors should move backward

Parallelism of the ridges:

The removal of the teeth tends to leave the residual alveolar ridges nearly parallel to each other

Due to teeth lost at different times, the residual ridges are no longer parallel

Ridge parallelism is unfavorable

Ridge parallelism is causing the dentures to slide anteriorly or posteriorly

*The preliminary centric relation record:

Will be transferred to an articulator

Is made prior the height of the mandibular occlusion plane has been determined

Is made prior the occlusion rims have been contoured

Is made prior the preferred interocclusal space has been established

Is made prior the final impression

The materials used for the static interocclusal records of centric relations in complete denture:

The consistency of the material must not offer resistance during mandibular closure

The material must not inadvertently guide the path of the mandible

The materials do not harden to provide a “ check- bite” record

The material must not support the models during the mounting process

The material must not retain the relationship between the occlusion rims

The simple hinge articulator in complete dentures:

Can be relied on to preserve the centric relation position precisely

Occlusal contacts in centric relation can be perfected

The instrument itself is not rigid

Can be used to relate the occlusal surfaces in excursive movements

Refining non- working side contacts for balanced occlusion is possible

Stock trays can be used for final impressions when obtaining a removable partial denture if:

The selected tray has suitable clearance from oral tissues for the selected impression material

The selected tray has sufficient coverage of the impression area

The selected tray does not require customization by border molding

The denture is constructed without any mouth preparations

When taking a final impression for removable partial denture one can use the following types of trays:

Custom tray made of self-curing acrylic

Custom tray made of light-curing urethane dimethacrylate

Advantages of custom trays:

hey are rigid and dimensionally stable

They are tailored to the impression area

The clearance between the tray and the tissues can be adjusted prior to fabrication

They are flexible and dimensionally stable

They can be used in conjunction with adhesive agents

The single tray functional impression technique for removable partial denture:

Is a relatively complicated technique

The altered cast technique for obtaining a removable partial denture:

Starts with a conventional impression

All the denture parts are made on the same cast

The laboratory work is complicated

Does not involve cutting the initial cast

When taking the impression for removable partial denture:

The tray should be positioned with mild finger pressure

The tray should be kept still with fingers on the premolar area

Lips should be pulled to cover the impression tray

When removed, the tray should be pulled perpendicular to the long axis of teeth

Cleaning and disinfection is not mandatory

For removable partial dentures, the alginate material:

Is an acceptable choice for final impression

Cannot be use for final impression

Doesn’t need to be poured immediately

The altered cast technique for obtaining a removable partial denture:

The metal framework is used to make the impression of the free-end edentulous spaces

The acrylic saddles are used as individual trays

The acrylic saddles require border molding

Pressure should be applied on the saddles

Pressure should not be applied on the metal framework

*The characteristics of the major connector for removable partial denture include:

Interference with movable tissue

Use of marginal gingiva for support

Lingual bar of a removable partial denture:

Has a triangular shape in cross section

Can be used in every clinical situation

Indirect retainers for removable partial dentures:

Need to be positioned perpendicular to the fulcrum line

Can be incisal or cingulum rests

Prevent displacement of the denture away from the tissues

Need to be positioned close to the fulcrum line

Are required in Kennedy Class I, Class II dentures

An occlusal rest used in removable partial denture:

The shape of the rest should be spoon shaped from the sagittal view

The recommended size is 1/3 to ½ the mesiodistal diameter of the abutment

Does need a preparation on the lingual side of the canine

The recommended size is ¼ the buccolingual width of the tooth

The angle between the floor of the rest and the minor connector should be greater than 90°

Rest are used in removable partial denture to:

Transmit occlusal forces from the prosthesis to an abutment along the long axis of the tooth

Resist the denture base movement toward the gingival tissue

Maintain clasps in the desired positions

Favor extrusion of unopposed abutment teeth

REMOVABLE PROSTHODONTICS

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40 questions

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MULTIPLE SELECT QUESTION

30 sec • 1 pt

Factors that influence the form and the size of the supporting bone include the following:

The severity of the periodontal disease

Quantity of saliva

The relative length of time different parts of the jaws have been edentulous

The compliance of the patient

Quality of life

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Mandibular stress- bearing areas are:

Firm tuberosities

Buccal shelves

Retromolar pads

Rugae

Hard palate

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

*To make an ideal impression, the following concepts should be adhered to:

The tissue of the mouth must not be healthy

Proper space for the selected impression material should not be provided within an impression tray

The impression should extend to include the entire basal seat

Border modeling procedure is not necessary

Correct positioning of the impression tray in the mouth doesn’t need a guiding mechanism

MULTIPLE SELECT QUESTION

30 sec • 1 pt

The posterior palatal seal:

Create a border seal to decrease the risk of dislodgement of the denture upon speaking and mastication

Is created at the anterior periphery of the denture

A class I palate is the most favorable for denture retention

The tissue can be displaced several millimeters anterior to the vibrating line

A class III palate is the most favorable for denture retention

MULTIPLE SELECT QUESTION

30 sec • 1 pt

The neutral zone:

Is recorded in the final impression phase

Occupies a position of equilibrium among the groups of tongue, cheek and lip muscle

Is first established in the wax occlusion rim

It is not a guide for prosthetic teeth position

It is not a guide for the location of a planned denture’s polished surface

MULTIPLE SELECT QUESTION

30 sec • 1 pt

The dentist uses occlusion rims to:

Determine the supporting areas

Determine the posterior palatal seal

Determine all potential denture- bearing tissues

Determine the neutral zone

Establish the level of the occlusal plane

MULTIPLE SELECT QUESTION

30 sec • 1 pt

A complete denture:

Has five surfaces

Has an impression /intaglio surface

Has a polished surface

The impression surfaces make contact during functional activities

The occlusal surfaces don’t contact during functional activities

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REMOVABLE PROSTHODONTICS

Factors that influence the form and the size of the supporting bone include the following:

Mandibular stress- bearing areas are:

*To make an ideal impression, the following concepts should be adhered to:

The posterior palatal seal:

The neutral zone:

The dentist uses occlusion rims to:

A complete denture:

*The occlusion rim:

The maxillary rim:

The incisive papilla:

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