dentures.01 edentulous ridges & tx planning Flashcards by Mark Whatcott

Is the horizontal portion of the palate a primary or secondary stress bearing area?

Primary stress bearing

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What term defines the portion of the mandibular vestibule from the crest of the ridge, laterally to the oblique line and anteriorly to the buccal frenum?

Also, what kind of bone is this segment made of?

Buccal shelves

This portion is made of dense cortical horizontal bone, making it more suited to stress bearing

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The hamular notches go by what more anatomical name?

Pterygomaxillary notch

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Where is the pterygomaxillary notch located?

Junction of the maxilla and the pterygoid hamulus of the sphenoid bone

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Angular cheilitis:
Where does it form?
What is it characterized by clinically?
What are the majority of these lesions caused by?
It is often caused by a reduced ________.

It forms at the commissures of the lips.
It is characterized by erythema, fissuring, and scaling.
The majority are caused by Candida albicans and Staphylococcus aureus.
It is often caused by a reduced Occlusal Vertical Dimension (OVD)

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Lesions at the commissures of the lips that show erythema and fissuring are likely to be what kind of lesion?

Angular cheilitis

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Denture stomatitis is a form of what broader genre of infection?

Erythematous candidiasis

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What infection/lesion is caused by the continuous wearing of a removable prosthesis with poor oral hygiene habits?

Denture stomatitis

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A reactive tissue growth that usually develops on the hard palate beneath a denture base, showing erythematous, papillary (pebbly) mucosa is:

Inflammatory papillary hyperplasia

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What hyperplasia is commonly associated with overextended denture flanges and appears as a single or multiple folds of hyperplastic tissue in the alveolar vestibule?

Inflammatory fibrous hyperplasia

a.k.a. epulis fissuratum

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What three concepts define the “Complete Denture Triad”? What does each term describe?

Retention (resistance to vertical displacement)
Stability (resistance to lateral displacement)
Support (resistance to vertical forces of occlusion)

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With respect to retention, the maxillary denture especially relies on what?

Atmospheric seal

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What is the most important factor in denture stability?

Complete denture flange length
(the longer it is, the more stable it is, so long as it isn’t too long which would lead to Epulis fissuratum or inflammatory fibrous hyperplasia)

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The mandibular arch has 3 different sources of support, what are they?
Lateral stops = ?
Distal stops = ?
Anterior stops = ?

Lateral stops = buccal shelves (dense cortical bone)
Distal stops = retromolar pads
Anterior stops = mental prominences

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The maxillary arch has 2 different sources of support, what are they?

Horizontal portion of the hard palate

2. Crest of the edentulous ridge

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T/F x 2:
As with all types of dental prostheses, complete denture occlusal schemes aim to mimic the occlusal relationships found in natural dentition because these naturally-occurring occlusal schemes offer the best prognosis for removable complete prostheses.

False, false

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Place the following in the correct chronological order of the compression-molded complete denture processing technique.

packing
boil out
investing
curing 
finishing
de-flasking

investing
boil out
packing
curing
de-flasking
finishing

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At what stages of a 5-appointment complete denture fabrication process is it appropriate to outline the extent of your post-palatal seal? (select all that apply)
appt #1
appt #2    
appt #3
appt #4
appt #5

Appt #2, 3, & 4
The post palatal seal can be obtained anytime after making final impressions and before processing, Appt #4 is a try in after the teeth have been set and before excursive movements have been balanced, it would seem that this choice would be correct as well. - Eddie
Appointment 2, 3 and 4. I don’t think Appointment 1 is a correct answer bc you haven’t made the final impressions yet. -Danielle
I agree - Hannah K “You can transfer the outline to your master cast using your final impression or record base, anytime after making the final impressions and before processing the prostheses”

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(1) A steep horizontal condylar guidance increases the separation of posterior teeth during certain eccentric movements. (2) The value of the guidance is under the dentist’s control.
Statement 1 is false. statement 2 is true
both the statements are false
both statements are true
statement 1 is true. statement 2 is false

Statement 1 is true, statement 2 is false

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The purpose of “v” shaped notches on the occlusal surface of the wax rims is to _______ (select all that apply)

a. provide a physical reference for setting the posterior teeth
b. minimize bulk of wax on rims, thereby reducing distortion
c. allow more accurate repositioning of the centric relation record
d. provide a physical reference for the selectio nof adequate prosthetic teeth

c. allow more accurate repositioning of the centric relation record

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Generally, the most labially prominent portion of a prosthetic maxillary canine is the \_\_\_\_\_\_\_\_
cingulum
cusp tip
cervical third
middle third

cervical third

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Which theory of impression making is defined as an impression and denture base that are accurate negatives of the ridge tissues in their normal passive form? (short answer)

Mucostatic

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In the following image of a protrusive movement with record bases and wax occlusion rims, which phenomenon is observed in the posterior region?
[picture of lateral view of skull with bulging structure on the chin]

Christiansen’s phenomenon
Raynaud’s phenomenon
Ivanhoe’s phenomenon

Christiansen’s phenomenon

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Match the name of the instrument to its description:
Water bath - Facebow - Trubyte metal occlusal plane - Mounting plate
a. Tempers the modeling compound prior to insertion and border molding:
b. Allows the attachment of a cast to an articulator:
c. Allows the visualization and setting of prosthetic teeth on a flat plane:
d. Relates the maxillary master cast to a horizontal plane of reference:

a. Tempers the modeling compound prior to insertion and border molding: Water bath
b. Allows the attachment of a cast to an articulator: Mounting plate
c. Allows the visualization and setting of prosthetic teeth on a flat plane: Trubyte metal occlusal plane
d. Relates the maxillary master cast to a horizontal plane of reference: Facebow

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``` Prior to making complete denture final impressions, it is necessary for the patient not to wear any dental prostheses for a minimum of _________. 24 hours 72 hours 48 hours 2 hours 4 hours ```

24 hours

T/F x 2: Maxillary and mandibular anterior prosthetic teeth for complete dentures are arranged so as not to contact each other. The rationale behind that is to maintain a steep incisal guide angle. The statement is false, and the reason is true The statement is true, and the reason is true The statement is true, and the reason is false The statement is false, and the reason is false

The statement is true, and the reason is false

Which of the following factors more greatly influences the amount of pressure generated during impression-making? Placement of vent holes in the custom impression trays Application of wax relief Viscosity of the impression material None of the above

Viscosity of the impression material

``` The polished surface of the lingual flanges of the mandibular complete denture should be _______. concavo-convex convex concave straight ```

concave

``` What type of bone underlies the buccal shelves? sclerotic bone alveolar bone trabecular bone cancellous bone cortical bone ```

Cortical bone

Word bank: 3mm, lingual cusp incline, buccal cusp incline, 1mm, marginal ridge, central fossa, buccal cusp tip, palatal cusp tip In a lingualized balanced occlusal scheme, a working contact is defined as a contact between a maxillary __________ and the opposite mandibular __________ during an excursive movement of up to __________.

In a lingualized balanced occlusal scheme, a working contact is defined as a contact between a maxillary palatal cusp tip and the opposite mandibular lingual cusp incline during an excursive movement of up to 3mm.

``` You are fabricating your first set of complete dentures on a patient. Prior to receiving the processed prostheses from the laboratory, you decide to destroy your remount jig. What additional step must you now perform during appointment #5? make a facebow record make a centric relation record make a new tooth arrangement make a protrusive record ```

make a facebow record

Word bank: 0, 1, 2, 3, 4, 5 In a lingualized balanced occlusal scheme, a minimum of __ centric, __ working and __ balancing contacts are required.

In a lingualized balanced occlusal scheme, a minimum of 4 centric, 3 working and 2 balancing contacts are required.

``` The presence of angular cheilitis on a patient wearing complete dentures is an indicator of a(n) _____________. incorrect anterior tooth arrangement overestimated OVD absence of balanced occlusion underestimated OVD ```

underestimated OVD

A retracted tongue position provides a more favorable prognosis for a mandibular complete denture. True False

False

Name the type of chemical reaction that the acrylic resin undergoes during heat-processing using the compression-molded technique. (short answer)

Polymerization

``` The constant posterior functional element in a lingualized balanced occlusal scheme is the ________ maxillary buccal cusp maxillary palatal cusp mandibular lingual cusp incline maxillary central fossa mandibular central fossa mandibular buccal cusp incline ```

maxillary palatal cusp

``` Based on a five-appointment sequence for fabricating complete dentures, adjusting the wax occlusion rims is performed during clinical appointment number four two one five three ```

three

``` The prosthetic teeth used in DENT2103 are made from _______ polymethyl methacrylate resin feldspathic porcelain monolithic zirconia nanohybrid composite resin ```

polymethyl methacrylate resin

T/F: (1) Increasing the vertical overlap of anterior prosthetic teeth will increase the incisal guide angle. (2) whereas increasing the horizontal overlap of said teeth will decrease the incisal guide angle. both statements are false statement 1 is false, statement 2 is true statement 1 is false, statement 2 is false both statement are true

both statements are true

``` Which of the following materials is an elastomer? modeling compound polyether alginate disclosing wax ```

polyether

``` When carving the post-palatal seal, its deepest portion will have a depth of _________ 0.5mm-1mm 2mm-2.5mm 1.5mm-2mm 1mm-1.5mm ```

1mm-1.5mm

Arrange the following steps in their correct chronological order: ``` Unmount the master casts Perform selective grinding Mount the master casts Fabricate a remount jig Make a facebow record Fabricate remount casts ```

``` Make a facebow record Mount the master casts Fabricate a remount jig Unmount the master casts Fabricate remount casts Perform selective grinding ```

Proper lip support for a complete denture patient should ultimately be established by the ________ (select all that apply). Facial surface of the anterior teeth A preset 20 degree labial inclination of the anterior teeth A preset 10 degree palatal inclination of the anterior teeth Convex surface of the labial flange

Facial surface of the anterior teeth

``` Triad TruTray custom tray material is a(n) _______________ Select one. Resin composite Acrylic resin Wax compound Thermoplastic compound ```

Acrylic resin

An increased horizontal overlap is acceptable in a patient with a Class II ridge relationship. True False

True

``` Which of the following represent a non-balanced occlusal scheme? Bilateral balanced occlusion Mutually-protected occlusion Group function Lingualized occlusion ```

Mutually-protected occlusion

``` Select the correct answer plane of reference for the Whipmix Quickmount facebow Nasion + 23mm Ala-tragus line Nasion - 23mm Camper’s plane Fox’s plane Ala-philthrum line ```

Nasion - 23mm

The position assumed by the mandible when the attached muscles are in a state of tonic equilibrium is called the __________.

rest position

``` Inflammatory fibrous hyperplasia is mainly caused by ________________ Concave prosthesis surfaces Ill-fitting prosthesis intaglio underextended prosthesis borders overextended prosthesis borders ```

overextended prosthesis borders

``` Which maxillo-mandibular relation allows us to set the horizontal condylar guidance? protrusive record centric relation record verification jig laterotrusive record ```

protrusive record

Word Bank: head of the condyle, laterotrusive, anterior extension, height, slope, centric relation, glenoid fossa, concave, incisal guidance, protrusive, linear portion A __________ record registers the __________ of the __________ of the __________.

A _protrusive_ record registers the _slope_ of the _linear portion_ of the _glenoid fossa_

``` At appointment #5, complete denture borders should be checked for overextension using _______ Select one: Pressure indicating paste Rope (extension) wax Blockout wax Disclosing wax ```

Disclosing wax

Word bank: incisal guidance, retromolar pad, canine guidance, lateral condylar guidance, horizontal condylar guidance, vibrating line The posterior end guidance of jaw movement is determined by the __________, whereas the anterior end guidance apparatus is determined by the __________.

The posterior end guidance of jaw movement is determined by the horizontal condylar guidance, whereas the anterior end guidance apparatus is determined by the incisal guidance.

From a frontal view, all of the following are characteristics of aesthetic anterior tooth arrangement, except __________ Select one: the cusp tips of the maxillary canines are at the level of the plane of occlusion the cervical neck of the maxillary lateral incisors is slightly palatally depressed the zenith of the maxillary central incisors is slightly distalized the disto-labial aspect of the maxillary canines is prominently visible

the disto-labial aspect of the maxillary canines is prominently visible

The following is an image of a _________ spatula. [picture of a pointy end of a big spatula] ``` #31 #17 Spear #23 ```

#31

The central groove of the posterior teeth should be arranged following ________- A line extending from the tip of the canine to the medial portion of the retromolar pad a line extending from the tip of the canine to ⅔ the height of the retromolar pad a line extending over the crest of the edentulous ridge None of the above

a line extending over the crest of the edentulous ridge

Select the landmarks and measurement that are partially or entirely based on observed statistical averages in the human population. Select one or more: a. level of the plane of occlusion b. anterior height of the maxillary wax occlusion rim c. physiologic rest position d. occlusal vertical dimension e. interocclusal rest space

a. level of the plane of occlusion b. anterior height of the maxillary wax occlusion rim c. physiologic rest position d. occlusal vertical dimension e. interocclusal rest space The only answers should be A, B and E. -Danielle and Shawn ^ Are you guys sure about B? I thought on that slide (21 on Record Bases and Occlusal Rims) it was just referring to the 2/3s height of retromolar pads -Tyrome

Define crest of the alveolar ridge:

Highest continuous surface of the residual ridge; not necessarily coincident with the center of the ridge

As a general guideline for the position of the labial aspect of maxillary central incisors, the distance between lines a and b should range from _______ 10mm to 12mm 8mm to 10mm 6mm to 8mm 4mm to 6mm

8mm to 10mm

The posterior extent of maxillary record bases for complete dentures should be 2-3mm less than that of the definitive prosthesis. This helps produce accurate records and minimizes any gagging reflex during maxillo-mandibular relation and tooth try-in. The statement is true, the reason is true The statement is false, the reason is true The statement is false, the reason is false The statement is true, the reason is false

The statement is false, the reason is false

``` What is the cuspal inclination of the Ivoclar Vivadent Ortholingual prosthetic teeth used in DENT2103? 0 degrees 33 degrees 15 degrees 30 degrees 10 degrees ```

15 degrees

``` Select the materials that are malleable at room temperature (select all that apply) Red boxing wax Extra-hard baseplate wax Red modeling compound Disclosing wax Green-modeling compound ```

Red boxing wax | Disclosing wax

The length of the maxillary bicuspids should be selected to be similar in cervico-occlusal height as the adjacent canines. Why? To make it possible to balance the occlusion All of the above To ensure masticatory efficiency To avoid displaying the pink denture base when smiling

To avoid displaying the pink denture base when smiling

Statement 1: The posterior extension of the maxillary denture base is the function of the patient’s vibrating line. Statement 2: The laboratory technician can independently determine that extension. Statement 1 is true. Statement 2 is false Both statements are false Both Statement are true Statement 1 is false. Statement 2 is true

Statement 1 is true. Statement 2 is false

``` A centric relation record using the processed prosthesis is made during a ___________ Initial maxillo-mandibular relation clinical remount tooth arrangement try-in protrusive record ```

clinical remount

Arrange the following steps in the correct chronological order Arrangement of mandibular anterior teeth Arrangement of maxillary posterior teeth Arrangement of mandibular posterior teeth Setting of adjustable incisal guide table Arrangement of maxillary anterior teeth

Arrangement of maxillary anterior teeth Arrangement of mandibular anterior teeth Setting of adjustable incisal guide table Arrangement of mandibular posterior teeth Arrangement of maxillary posterior teeth

Arrange the following border molding steps in the correct chronological sequence. ``` Border mold in patient’s mouth Chill modeling compound in ice water Heat modeling compound Apply modeling compound on custom impression tray Dry custom impression tray Temper in water bath Trim excess modeling compound ```

``` Dry custom impression tray Heat modeling compound Apply modeling compound on custom impression tray Temper in water bath Border mold in patient’s mouth Chill modeling compound in ice water Trim excess modeling compound ```

Word bank: acrylic resin, shrinkage, provide a space, setting, VLC resin, final impression, compensate, festooning, clinical remount, processing, expansion, dental stone, master cast A postpalatal seal is designed to __________ for the __________ of the __________ during __________.

A postpalatal seal is designed to _compensate_ for the _shrinkage_ of the _acrylic resin_ during _processing_.

``` Select the correct answers regarding the atmospheric seal around complete dentures Select one or more: The mandibular seal is dynamic the maxillary seal is dynamic the mandibular seal is static the maxillary seal is static ```

The mandibular seal is dynamic | The maxillary seal is static

Word bank: buccal cusp incline, buccal cusp, palatal cusp, lingual cusp, central fossa In a reverse articulation occlusal relationship, the __________ of the maxillary first molar occlude with the __________ of the mandibular first molar.

In a reverse articulation occlusal relationship, the _buccal cusp_ of the maxillary first molar occlude with the _central fossa_ of the mandibular first molar.

``` A conventional final impression for a complete denture captures the contours of ________ (select all that apply) the intaglio surface the post-palatal seal none of the above the cameo surface ```

the intaglio surface

``` Which of the listed anatomical locations generally exhibits more keratinized attached mucosa? Select one: posterior portion of the mandibular arch maxillary soft palate posterior portion of the maxillary arch anterior portion of mandibular arch ```

posterior portion of the maxillary arch

``` How many muscle attachments underlie a retromolar pad? Select one: 3 2 4 1 5 ```

3 - Buccinator, deep temporal tendon, pharyngeal constrictor (slide 40, 2nd PPT)

``` From a frontal view, the cusp tips of the prosthetic maxillary canines should be arranged ________ Select one: parallel to the internostril line parallel to the Frankfort plane perpendicular to the interpupillary line parallel to Camper’s plane parallel to the interpupillary line ```

parallel to the interpupillary line

Match the mandibular anatomical structure with its stress-bearing classifications: non-stress breaking area ** secondary stress bearing area ** primary stress bearing area Ridge slope: Ridge crest: Retromolar pad: Buccal shelf:

Ridge slope: Secondary stress-bearing area Ridge crest: Non-stress-bearing area Retromolar pad: Secondary stress-bearing area Buccal shelf: Primary stress-bearing area

Successful complete denture treatment depends on a positive communication and detailed patient education at the time the prostheses are delivered True False

False

``` What are the anatomical boundaries of the buccal shelf? (select all that apply) Select one or more: external oblique ridge crest of the residual ridge hamular notch coronoid process buccal frenulum masseter muscle pterygomandibular raphe ```

``` external oblique ridge (lateral) crest of the residual ridge (medial) buccal frenulum (mesial) masseter muscle (distal) ```

The black circular knob on the top of the Triad curing unit serves to ___________. Raise or lower the carousel’s platform Lock or unlock the unit’s door set the polymerization timer access and replace the light bulb

Raise or lower the carousel's platform

``` Match the maxillary anatomical structure with its stress-bearing classification. Non-stress-bearing ** Secondary stress-bearing ** Primary stress-bearing Rugae: Midpalatine raphe: Ridge slope: Incisive papillae: Hard palate (horizontal portion): Maxillary tuberosities: Ridge crest: ```

Rugae: Non-stress-bearing Midpalatine raphe: Non-stress bearing Ridge slope: Secondary stress-bearing Incisive papillae: Non-stress-bearing Hard palate (horizontal portion): Primary stress-bearing Maxillary tuberosities: Primary stress-bearing Ridge crest: Secondary Stress-bearing

Name the specific occlusal scheme used in the laboratory portion of this course.

Lingualized occlusion

Word bank: denture base, junction of the hard and soft palate, occlusion rim, posterior, foveae palatini, curve, hamular notches, buccal, vibrating line, line The __________ extension of the maxillary __________ is determined by a __________ that connects the __________ along the __________.

The _posterior_ extension of the maxillary _denture base_ is determined by a _line_ that connects the _hamular notches_ along the _vibrating line_.

Heat processing of complete dentures using compression modeling must be performed for 9 hours at 165 degrees F. True False

False This question is worded a little tricky. Heat curing dentures for 9 hours at 165 degrees F is completely acceptable, but is not the ONLY acceptable way to do it. Can cure at 165 degrees for 1.5 hrs and then at 212 degrees for another half hour. Can also bench set for a half hour and heat cure for a half hour at 212 degrees. I would say the answer is still false, because of the use of the word “must;” however, 9 hrs @ 165 degrees F is an accepted technique. - Eddie I totally agree Eddie. I just came to that exact same conclusion - Alan; Same - Han

The following cross-sectional image represents a correct and desirable mandibular tooth arrangement relative to the plane of occlusion (dotted line) following a lingualized balanced occlusal scheme. [picture of mand. molars inclined lingually, with the buccal cusps on the dotted line and the lingual cusps set below it] True False

False

``` all of the following structures should exhibit centric relation contact in a lingualized balanced occlusal scheme, except __________. the maxillary palatal cusp the maxillary buccal cusp the mandibular central fossa none of the above all of the above ```

the maxillary buccal cusp

This is an all or nothing multiple answer question: In a natural dentition, the shade of the maxillary canines is generally select one or more: similar to the maxillary central incisors lighter than the maxillary central incisors lighter than the mandibular central incisors similar to the mandibular central incisors darker than the maxillary central incisors darker than the mandibular central incisors

darker than the maxillary central incisors | darker than the mandibular central incisors

``` The fovea palatini are generally located within _________ of the vibrating line. 4mm 3mm 2mm 5mm ```

2mm

dentures.01 edentulous ridges & tx planning Flashcards

(86 cards)