Flexion characteristics of four-unit fixed partial denture frameworks using holographic interferometry.
Flexion of a metal/ceramic fixed partial denture (FPD) framework under function can cause fracture of the porcelain or deterioration of the cement seal. This study evaluated the flexion under compressive load of a four-unit mandibular FPD replacing the second premolar and the first molar. Testing was accomplished with elapsed time holographic interferometry, using 39 porcelain fused-to-metal frameworks cast with a silver-palladium alloy. The results demonstrated that solder joints at the junction of the premolar and molar pontics flexed under a reduced compressive load and exhibited a higher failure rate than other connector designs.
Division of Restorative and Prosthodontic Sciences, Kriser Dental Center, Division of Restorative and Prosthodontic Sciences, New York University, N.Y.
G R
GR
Goldstein
A
A
Wesson
K
K
Schweitzer
B
B
Cutler
D000704:Analysis of Variance; D000044:Dental Abutments; D003776:Dental Porcelain / Q000737:chemistry*; D012994:Dental Soldering; D003799:Dental Stress Analysis; D003830:Denture, Partial, Fixed; D004548:Elasticity; D006696:Holography; D007368:Interferometry; D008422:Materials Testing; D016876:Metal Ceramic Alloys / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry; D010781:Photography; D012834:Silver / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties
D016876:Metal Ceramic Alloys; D003776:Dental Porcelain; D012834:Silver; D010165:Palladium