68 - Cantilever bridge restorations.

section

• cantilever bridge

• parts of cantilever fpd

• equation for occlusal pressure \equation for chewing force

• general considerations for cantilever bridge

• complications

• cantilever bridge

• has an abutment or abutments at one end only, with the other end of the pontic remains unattached.

• This is a potentially destructive design due to the lever arm created by the pontic.

• Type of simple fixed partial dental prosthesis called fixed-free. (Fixed = abutment tooth, free = replaced tooth)

section

• cantilever bridge

• parts of cantilever fpd

• equation for occlusal pressure \equation for chewing force

• general considerations for cantilever bridge

• complications

• cantilever bridge

• has an abutment or abutments at one end only, with the other end of the pontic remains unattached.

• This is a potentially destructive design due to the lever arm created by the pontic.

• Type of simple fixed partial dental prosthesis called fixed-free. (Fixed = abutment tooth, free = replaced tooth)

• parts of cantilever fpd

• Retainer: part that seats on abutment tooth.

• Pontic: suspended member of the FPD that replaces missing tooth.

• Connector: provides connection between the retainer and the Pontic.

• Abutment tooth: tooth that provides support for retainer.

• equation for occlusal pressure

periodontal pressure is constant = k

OCCLUSAL PRESSUREW/PERIDODNTAL PRESSURE = k

2OCCLUSAL PRESSURE/PERIDONATL PRESSURE = K

OCCLUSAL PRESSURE/1/2 PERIDONTAL PRESSURE = K

• general considerations for cantilever bridge

1. Cantilever should replace only one tooth and have two abutments (but not always!)

2. Pontic should be on medial side (but not always!)

3. Length of the lever should be shorter than the support.

• complications

Complications include periodontal abscess!