Porcelain Fused to Metal Bridges
The porcelain in porcelain fused to metal bridges should be nearly of equal thickness to avoid the possibility of weakening through uneven stress concentration. To meet this requirement, there should be a continuous strip of exposed metal on the lingual surface.
Porcelain veneer on pontic is continuous with the veneer on the retainers. It covers incisal portion of the lingual, labial and entire area adjacent to or contacting the ridge.
The porcelain tissue contact allows for better esthetics thickness of porcelain covering the undersurface or gingival area of the pontic is about 0.5 mm. The metal underlying veneering area of pontic follows the same contours of porcelain.
Porcelain-metal junction must not be placed too close to the incisal edge. If it’s placed close to the incisal edge the incisal translucency will be destroyed and the chances of porcelain fracture will be increased because the porcelain is no longer supported by metal.
For more info about Metal Ceramic Restorations, please read the articles I wrote for these informative webpages:
Metal Ceramic Fixed Partial Denture – http://costdentures.com/fixed/fixed-partial-denture-metal-coping/
 Johnston J F et al: Modern practice in crown and bridge prosthodontics. WB Saunders Company
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.”
Jesus Lecitona+, DMD, MScD-Prosthodontics
Email your questions about Porcelain Fused to Metal Bridge to: jes[at]lecitona.com
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