Posts Tagged ‘ fpd ’
Fixed Partial Denture for Equipoise
Causes of Injury in Tooth Prep
Considerable heat is generated by friction between a rotary instrument and the surface being prepared. Excessive pressure, higher rotational speeds, and the type, shape and condition of cutting instrument. Feather light touch and water spray should be used.
Chemical Action
The chemical action of some dental materials (bases, restorative resins, solvents and luting agents) can caused pulpal damage.
Bacterial Action
Pulpal damage under restorations has been attributed to bacteria that either were left behind or gained access to the dentin because of microleakage. Antimicrobial agent after tooth preparation and before cementation should be used.
Tooth preparation for endodontically treated teeth for Fixed Partial Denture
Preop Periapical X Ray Showing Endo Treated Central and Lateral Incisor
Root canal
Remove only minimal tooth structure. Overenlargement can perforate or weaken the root. The thickness of the remaining dentin is the prime variable in fracture resistance of the root.
Coronal
As much of the coronal tooth structure should be conserved as possible.
Provisional Dental Crowns
Procedure
Tooth preparation for endodontically treated teeth is a 3 stage operation
1. Removal of the root canal filling material to the appropriate depth.
2. Enlargement of the canal.
3. Preparation of the coronal tooth structure.
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Temporary / Provisional Dental Crown is usually made of acrylic resin. It is cemented on tooth 11 (upper right central incisor), after tooth preparation to protect the tooth while the final / permanent dental crown is being fabricated. The final restoration for this case is all-ceramic dental crown.
Provisional Crown for Tooth 11
All Porcelain Fixed Partial Denture to replace two missing Central Incisors. This is a 4 unit Alumina Crown and Bridge fabricated for a 21 year old female patient.
All Ceramic Fixed Partial Denture
Clinical management and laboratory procedures in Fixed Partial Denture
1. Mouth examination
Diagnosis and treatment planning
2. Selection of stock trays
Preliminary impression
Post placement and core build-up
3. Tooth preparation
a. Incisal / occlusal reduction
b. Proximal reduction
c. Facial reduction
d. Lingual reduction
e. Gingival margins
f. Rounding up of sharp corners and line angles
g. Finishing and parallelism
4. Tissue management
Final impression
centric jaw relation record
5. Provisional restoration
6. Mounting of casts
7. Wax pattern for retainers casting
8. Fitting of metal retainer
9. Wax pattern for facing and pontic
10. Fitting of Fixed Partial Denture
11. Cementation of Fixed Partial Denture