Prosth INBDE Exam 2025 Questions
and Answers
What teeth should not be used as abutments for a bridge? - ANSWER✔✔-Endo treated
and compromised perio teeth
Ideal crown to root ratio - ANSWER✔✔-ideal=1:2
optimum=1:1.5
minimum=1:1
POOR: 2:1
What law describes the PDL surface area of the abutment teeth should be equal to or
greater than imaginary PDL surface area of the missing teeth - ANSWER✔✔-Ante's law
In the pic blue surface area = red SA
If blue SA < Red SA then not good indication for bridge
When replacing a canine what two teeth should be splinted together to prevent lateral
drifting of the bridge? - ANSWER✔✔-Central and lateral should be splinted together
,What forces does splinting distribute? - ANSWER✔✔-Occlusal forces
T/F: divergent, multiple, curved, and broad roots are preferred over single, conical, and
round roots for a bridge abutments - ANSWER✔✔-TRUE
What syndrome contraindicates full max denture when only mand anterior teeth are
present? - ANSWER✔✔-Combination syndrome
For an *overdenture* in the mandible you should ideally have ________ implants; and
for an overdenture in the maxilla you should ideally have _________________ implants.
- ANSWER✔✔-Mandible = 2
Maxilla = 4
Excess cement in cement retained crown can cause _______________? - ANSWER✔✔-
Peri-implantitis
T/F: Screw retained crown allows for crown removal and good maintenance -
ANSWER✔✔-TRUE
What is an irreversible hydrocolloid? - ANSWER✔✔-Alginate
what substance adds strength to alginate? - ANSWER✔✔-Diatomaceous earth
BQ* what controls the setting rate of alginate? - ANSWER✔✔-Trisodium phosphate
, Positions in which condyles articulate w/ the thinnest portion of respective discs in the
most anterior-superior position against the articular eminences is known as ______? -
ANSWER✔✔-Centric relation (CR)
is CR independent OR dependent of tooth contact - ANSWER✔✔-INDEPENDENT
Complete interdigitation of TEETH
Independent of condylar position - ANSWER✔✔-Maximum intercuspation (also known
as centric occlusion)
T/F: casts are ALWAYS mounted in MI - ANSWER✔✔-FALSE - only when MI can be
maintained (single fixed procedure like a crown)
T/F: Casts are mounted in CR when MI is impossible to maintain - ANSWER✔✔-TRUE
- such as in complete dentures or multiple missing teeth being restored
____________ is used to duplicate on the articulator the relationship of maxillary arch to
the skull and the mandible to the rotational center of the TMJ - ANSWER✔✔-Facebow
condylar guidance - ANSWER✔✔-Slope of articular eminence
Represented by HCI on articulator
Posterior determinant of occlusion
and Answers
What teeth should not be used as abutments for a bridge? - ANSWER✔✔-Endo treated
and compromised perio teeth
Ideal crown to root ratio - ANSWER✔✔-ideal=1:2
optimum=1:1.5
minimum=1:1
POOR: 2:1
What law describes the PDL surface area of the abutment teeth should be equal to or
greater than imaginary PDL surface area of the missing teeth - ANSWER✔✔-Ante's law
In the pic blue surface area = red SA
If blue SA < Red SA then not good indication for bridge
When replacing a canine what two teeth should be splinted together to prevent lateral
drifting of the bridge? - ANSWER✔✔-Central and lateral should be splinted together
,What forces does splinting distribute? - ANSWER✔✔-Occlusal forces
T/F: divergent, multiple, curved, and broad roots are preferred over single, conical, and
round roots for a bridge abutments - ANSWER✔✔-TRUE
What syndrome contraindicates full max denture when only mand anterior teeth are
present? - ANSWER✔✔-Combination syndrome
For an *overdenture* in the mandible you should ideally have ________ implants; and
for an overdenture in the maxilla you should ideally have _________________ implants.
- ANSWER✔✔-Mandible = 2
Maxilla = 4
Excess cement in cement retained crown can cause _______________? - ANSWER✔✔-
Peri-implantitis
T/F: Screw retained crown allows for crown removal and good maintenance -
ANSWER✔✔-TRUE
What is an irreversible hydrocolloid? - ANSWER✔✔-Alginate
what substance adds strength to alginate? - ANSWER✔✔-Diatomaceous earth
BQ* what controls the setting rate of alginate? - ANSWER✔✔-Trisodium phosphate
, Positions in which condyles articulate w/ the thinnest portion of respective discs in the
most anterior-superior position against the articular eminences is known as ______? -
ANSWER✔✔-Centric relation (CR)
is CR independent OR dependent of tooth contact - ANSWER✔✔-INDEPENDENT
Complete interdigitation of TEETH
Independent of condylar position - ANSWER✔✔-Maximum intercuspation (also known
as centric occlusion)
T/F: casts are ALWAYS mounted in MI - ANSWER✔✔-FALSE - only when MI can be
maintained (single fixed procedure like a crown)
T/F: Casts are mounted in CR when MI is impossible to maintain - ANSWER✔✔-TRUE
- such as in complete dentures or multiple missing teeth being restored
____________ is used to duplicate on the articulator the relationship of maxillary arch to
the skull and the mandible to the rotational center of the TMJ - ANSWER✔✔-Facebow
condylar guidance - ANSWER✔✔-Slope of articular eminence
Represented by HCI on articulator
Posterior determinant of occlusion
