Archive for the ‘ Partial Denture ’ Category

Resin Retained Bridge

Resin Retained Bridge is a fixed dental prosthesis that is luted to tooth structures, primarily enamel, which has been etched to provide mechanical retention for the resin cement.

Early design incorporated perforations on the lingual plate (Rochette Bridge) through which the resin bonded material passed to achieve a mechanical lock; subsequently, use of acid etching of the metal plate (Maryland Bridge) eliminated the need for perforations.

Resin Retained Fixed Partial Denture on master cast - denturesguide.com

Resin Retained Fixed Partial Denture on master cast – denturesguide.com

For more information on the best possible Prosthodontic Treatment for your case, please consult your Dentist. “There is no online material nor website that can substitute for professional advice.”

Reference
[1] Resin Retained Bridge – http://www.denturesguide.com/rrb/

Cantilever Bridge – Cantilever Fixed Partial Denture

Metal ceramic cantilever fixed partial denture

Metal ceramic cantilever fixed partial denture restoring the upper left lateral lateral incisor (tooth number 22, FDI).

Cantilever Bridge is a dental prosthesis where the artificial tooth is supported on one side only by one or more abutment teeth. It is indicated where the abutment tooth can carry the occlusal load of the artificial tooth and where the occlusion is protected against potentially damaging rotational forces.

Other indications of cantilever bridgework:
1 . the teeth on either side of the proposed pontic that might ordinarily be used as abutments for fixed bridgework are unsuitable by reason of morphology, periodontal pathology or unfavorable angulation.
2. Cosmetic needs cannot be met by conventional fixed bridgework.
3. The need to avoid unnecessary involvement of sound teeth is an overriding factor on grounds of pulpal risk, cosmetic implications or the temperament of the patient.

The said type of bridge is generally the most conservative design in terms of tooth preparation. There is no expected problem of paralleling abutment teeth during tooth reduction.

The safe size of the pontic is limited to one unit as leverage forces on the neighboring abutments can be damaging. If a contact point from the pontic to the adjacent tooth is not placed, the rotational forces could be destructive to the abutment tooth/teeth.

Advantages
1. It is the most conservative type of bridge when one abutment is needed (ie restoration of a missing lateral incisor).
2. If one tooth is used as abutment, there is no problem of paralelling abutment teeth during preparation.
3. There is no unnecessary involvement of other sound teeth as abutment, thus, pulpal risk and cosmetic implications are prevented.

Disadvantages
1. When double abutting, the force is concentrated on the most terminal abutment thus compromising the said tooth.
2. If a contact point from the pontic to the adjacent tooth is not placed, the rotational forces could be destructive to the abutment tooth.
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All Ceramic Bridge with CAD CAM Milled Zirconia Framework

All Ceramic Bridge with CAD CAM Milled Zirconia Framework

All Ceramic Bridge with CAD CAM Milled Zirconia Framework

In milled-porcelain core bridge, computer controlled technology is used to mill the framework instead of using the casting or the lost wax technique. Block of porcelain (zirconia) is cut by computer aided design/computer aided manufacturing system to produce the prosthodontic framework. The outer surface is made from compatible conventional porcelain. The fit is almost always accurate.

Compatible conventional ceramic (coefficient of thermal expansion) is overlaid onto the Zirconia core which is responsible for the improved translucency.

Advantages
1. Excellent esthetics.
2. Metal free without losing strength.
3. Good shade stability.
4. Less laboratory time for the construction of zirconia framework.
5. Excellent adaptation to the prepared abutment.
6. Avoids the hand made aspects of convention FPDs.
7. All ceramics are essentially noncorrosive by nature.
8. All ceramic materials have low affinity to plaque.
9. Very low temperature conduction.

Disadvantages
1. Expensive equipment.
2. Special training for the technician.
3. Obtaining the Chameleon effect is difficult because of stark white color of zirconium dioxide ceramic framework.
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Fixed-fixed Partial Denture – Fixed-fixed Bridge

Metal ceramic fixed-fixed partial denture

Fixed-Fixed Partial Denture is a dental prosthesis where the artificial tooth (pontic) or teeth (pontics) is supported rigidly on either side by one or more abutment teeth. It is indicated where missing teeth are bound by abutment teeth which are capable of supporting the functional load of the missing teeth. This design of Fixed Partial Denture has a minimum of three units that can be cemented in one piece. The preparation of abutments should be parallel to each other (parallel taper).

Advantages
1. Fixed-fixed partial denture is a robust design with maximum retention and strength.
2. Abutment teeth are splinted together which may be an advantage for teeth that are mobile.
3. This design of fixed prosthesis is the most practical for larger fixed partial dentures particularly when there has been periodontal disease.
4. The construction of the fixed-fixed partial denture in the dental laboratory is simple.

Disadvantages
1. Fixed-fixed partial denture requires preparation to be parallel. This results to more tooth reduction which may endanger the pulp.
2. The tooth preparation is sometimes slow because the parallelism should always be checked.
3. It requires extensive tooth preparations.
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Endo-crown – Endocrown

All Ceramic Endo-crown

All Ceramic Endo-crown is a restoration that reproduces the entire surface anatomy of the clinical crown and other lost structure of an endodontically treated tooth. It is milled from a ceramic block via CAD CAM system as a core build up and crown restoration in one piece. Endocrown is desirable in the case of root canal treated tooth with thin walls of coronal structure and substantial loss of tooth tissue. It is esthetically pleasing.

Advantages
1. Superior strength.
2. Esthetically pleasing.
3. Conservation of remaining tooth structure.
4. If retreatment is necessary, the removal of endo-crown is easy.

Disadvantages
1. Long term clinical results are needed.
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