Biomedical subjects
Publications and source records attributed to R Podesta.
Reports of bonding failures with resin-bonded fixed partial dentures (commonly called the "Maryland Bridge") are common. Failures are due to individual tooth mobility as much as they are to bonding inadequacy. The incorporation of stress relievers in the design of resin-bonded fixed partial dentures has created a dramatic reversal in bonding failures.
The potential for disease transmission has increased the importance of infection control in the dental laboratory. Impressions must be disinfected without altering their accuracy. The purpose of this study was to determine the dimensional stability of three impression materials: irreversible hydrocolloid, reversible hydrocolloid, and poly(vinyl siloxane). Thirty-six impressions were made with each material and divided into control, 10-minute, and 30-minute immersion groups using an iodophor as the disinfectant. A microscope was used to measure dimensional changes in the stone casts made from each group of impressions, and the percent change was analyzed using a two-way ANOVA. All dimensional changes after iodophor disinfection were small and within established limits.