OWN - Quintessenz Verlags-GmbH CI - Copyright Quintessenz Verlags-GmbH OCI - Copyright Quintessenz Verlags-GmbH TA - Int J Prosthodont JT - The International Journal of Prosthodontics IS - 1942-4426 (Electronic) IS - 0893-2174 (Print) IP - 6 VI - 8 PST - ppublish DP - 1995 PG - 572-579 LA - en TI - Influence of Reinforcement Design on the Loss of Marginal Seal of Provisional Fixed Partial Dentures FAU - Hazelton AU - Hazelton FAU - Nicholls AU - Nicholls FAU - Brudvik AU - Brudvik FAU - Daly AU - Daly CN - AB - Loss of marginal cement seal, initial fracture, and stiffness of three four-unit provisional restorations were Loss of marginal cement seal was monitored using strain gauges located occlusogingivally at the distal of the second molar abutment and the mesial of the first premolar abutment of a four-unit posterior fixed provisional restoration with two pontics. The provisional restorations were then placed in an Instron testing machine and loaded to initial fracture. Stiffness was calculated from the Instron recordings. The provisional designs were permachrome band-reinforced, wire-reinforced, and a nonreinforced control. Analysis showed: (1) the band-reinforced design withstood a significantly greater load before loss of cement seal (P AID - 847964