dentures.01 edentulous ridges & tx planning Flashcards
Is the horizontal portion of the palate a primary or secondary stress bearing area?
Primary stress bearing
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
The hamular notches go by what more anatomical name?
Pterygomaxillary notch
Where is the pterygomaxillary notch located?
Junction of the maxilla and the pterygoid hamulus of the sphenoid bone
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)
Lesions at the commissures of the lips that show erythema and fissuring are likely to be what kind of lesion?
Angular cheilitis
Denture stomatitis is a form of what broader genre of infection?
Erythematous candidiasis
What infection/lesion is caused by the continuous wearing of a removable prosthesis with poor oral hygiene habits?
Denture stomatitis
A reactive tissue growth that usually develops on the hard palate beneath a denture base, showing erythematous, papillary (pebbly) mucosa is:
Inflammatory papillary hyperplasia
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
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)
With respect to retention, the maxillary denture especially relies on what?
Atmospheric seal
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)
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
The maxillary arch has 2 different sources of support, what are they?
- Horizontal portion of the hard palate
2. Crest of the edentulous ridge
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
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
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”
(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
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
Generally, the most labially prominent portion of a prosthetic maxillary canine is the \_\_\_\_\_\_\_\_ cingulum cusp tip cervical third middle third
cervical third
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
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
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
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
