Mental Dental-Prosthodontics UPDATED ACTUAL
Questions and CORRECT Answers
Cement that: Resin Cement
Most compressive strength
Bonds to dentin
->Comes in light cure, chemical cure, or dual
cure varieties
Cement that: Zinc polycarboxylate cement
Chelation to calcium (aka a weak bond to ->chemically bonds to tooth
the tooth)
Minimal pulpal irritation
Cement that: Zinc oxide eugenol
Soothes the pulp (Also seen in GP and Periodontal pack)
contraindicated with composite (inhibits
polymerization of resin) DM:
*NEED to remove all the material before Eugenol "oil of cloves" provides soothing relief to hyperemic
permanently cementing crown pulp.
Boards/DM
Certain situations carrying a poor prognosis 1. Half or less bone support
for a Bridge: 2. Single retainer CANTILEVER
3. Multiple splinted abutment teeth
4. NON-RIGID CONNECTORS
5. Intermediate abutments= PIER->It's an abutment tooth used
to support a bridge all by itself (no teeth around it and
supporting 9t)
,What teeth should never be used for a 1. Endo tx teeth (The removed dentin makes them weaker)
bridge? 2. Compromised periodontal teeth
Ideal crown to root ration 1:2 Ideal
(1 part crown/ 2 parts imbedded into bone)
Poor crown to root ratio 2:1 (NOT used for abutments)
Ante's Law -states that the periodontal membrane area of the abutment
teeth for a fixed partial denture must be equal to or greater
than the periodontal membrane area of the teeth being
replaced.
Splinting teeth distributes ______ forces Occlusal
When is splinting teeth recommended? Where the periodontal surface of an abutment tooth is not
sufficient to support the bridge (Failure of Ante's law)
When replacing a _____ , the central and Canine
lateral should be splinted together to
prevent lateral drifting of the bridge. Boards
Preferred root shape Divergent, multiple, curved, and broad roots
(over single, conical, and round roots)
When are partial dentures recommended? 1. Long span of missing teeth (bridge no viable)
2. Distal extension
3. BONE LOSS around potential abutments
4. Bridge or implant is too expensive
When are Complete dentures In UPPER when only the MAND ANT teeth are present bc
contraindicated? severe damage to opposing premaxilla occurs
(COMBINATION SYNDROME)
Overdenture 2 implants placed in mandible
4 implants in maxilla
, Cement retained implant More economical
Allows minor angle correction
Easier to use in small teeth
->Requires more chair time and has the same chances of
loosening as screw retained
EXCESS CEMENT-> can cause peri-implantitis
-Loose bone
Screw retained implant -Retrievability allows for crown removal and good
maintenance (cleaning is easier)
-Access hole is through occlusal of posterior and lingual of
anterior
-Screw may loosen during function
What property of Alginate (Irreversible Trisodium phosphate
hydrocolloid) controls the setting rate?B
Centric Relation (CR) BOARDS Position in which CONDYLES articulate with the thinnest
avascular portion of their respective discs in the most
anterior=superior position against the articular eminences
->independent of teeth (teeth aren't important)
Maximum intercuspation (MI) BOARDS Complete interdigitation of TEETH
also referred to as Centric occlusion (CO) ->Independent of condylar position (condyles don't mean
anything here)
When should casts be mounted in CR? When MI is impossible to maintain (For pts who need
complete dentures, or multiple teeth being restored or
know replaced)
->because teeth might not lock together in a particular
position or they have no teeth
When should MI be used? For a single crown or bridge
->Interlocking of teeth can be done before or after a
procedure
Questions and CORRECT Answers
Cement that: Resin Cement
Most compressive strength
Bonds to dentin
->Comes in light cure, chemical cure, or dual
cure varieties
Cement that: Zinc polycarboxylate cement
Chelation to calcium (aka a weak bond to ->chemically bonds to tooth
the tooth)
Minimal pulpal irritation
Cement that: Zinc oxide eugenol
Soothes the pulp (Also seen in GP and Periodontal pack)
contraindicated with composite (inhibits
polymerization of resin) DM:
*NEED to remove all the material before Eugenol "oil of cloves" provides soothing relief to hyperemic
permanently cementing crown pulp.
Boards/DM
Certain situations carrying a poor prognosis 1. Half or less bone support
for a Bridge: 2. Single retainer CANTILEVER
3. Multiple splinted abutment teeth
4. NON-RIGID CONNECTORS
5. Intermediate abutments= PIER->It's an abutment tooth used
to support a bridge all by itself (no teeth around it and
supporting 9t)
,What teeth should never be used for a 1. Endo tx teeth (The removed dentin makes them weaker)
bridge? 2. Compromised periodontal teeth
Ideal crown to root ration 1:2 Ideal
(1 part crown/ 2 parts imbedded into bone)
Poor crown to root ratio 2:1 (NOT used for abutments)
Ante's Law -states that the periodontal membrane area of the abutment
teeth for a fixed partial denture must be equal to or greater
than the periodontal membrane area of the teeth being
replaced.
Splinting teeth distributes ______ forces Occlusal
When is splinting teeth recommended? Where the periodontal surface of an abutment tooth is not
sufficient to support the bridge (Failure of Ante's law)
When replacing a _____ , the central and Canine
lateral should be splinted together to
prevent lateral drifting of the bridge. Boards
Preferred root shape Divergent, multiple, curved, and broad roots
(over single, conical, and round roots)
When are partial dentures recommended? 1. Long span of missing teeth (bridge no viable)
2. Distal extension
3. BONE LOSS around potential abutments
4. Bridge or implant is too expensive
When are Complete dentures In UPPER when only the MAND ANT teeth are present bc
contraindicated? severe damage to opposing premaxilla occurs
(COMBINATION SYNDROME)
Overdenture 2 implants placed in mandible
4 implants in maxilla
, Cement retained implant More economical
Allows minor angle correction
Easier to use in small teeth
->Requires more chair time and has the same chances of
loosening as screw retained
EXCESS CEMENT-> can cause peri-implantitis
-Loose bone
Screw retained implant -Retrievability allows for crown removal and good
maintenance (cleaning is easier)
-Access hole is through occlusal of posterior and lingual of
anterior
-Screw may loosen during function
What property of Alginate (Irreversible Trisodium phosphate
hydrocolloid) controls the setting rate?B
Centric Relation (CR) BOARDS Position in which CONDYLES articulate with the thinnest
avascular portion of their respective discs in the most
anterior=superior position against the articular eminences
->independent of teeth (teeth aren't important)
Maximum intercuspation (MI) BOARDS Complete interdigitation of TEETH
also referred to as Centric occlusion (CO) ->Independent of condylar position (condyles don't mean
anything here)
When should casts be mounted in CR? When MI is impossible to maintain (For pts who need
complete dentures, or multiple teeth being restored or
know replaced)
->because teeth might not lock together in a particular
position or they have no teeth
When should MI be used? For a single crown or bridge
->Interlocking of teeth can be done before or after a
procedure
