Authors : K. Seyedan , H. Sazegara , M. Kalalipour and K. Alavi
Abstract: Passive fit is one of the most important requirements for successful implant supported prosthesis. Failure to achieve passive fit can result in complications. Present study evaluated dimensional accuracy of polyether and poly vinyl siloxane impression materials, used with different impression techniques in splinted and nonsplinted implants. Ten samples were made for each group. The model was fabricated to obtain 4 implants by the diameter of 4 mm. Forty trays were fabricated with metacrylate composite resin. Four groups of impression materials (poly vinyl siloxane and polyether) and procedures (splinted vs. nonsplinted) were used. Implant abutments were placed on implant analogues after impression techniques were completed and ball tops were also seated on the abutments. Abutment distances were measured by Coordinate Measuring Machine (CMM) machine by an automatic probe measuring the center of ball tops from each other and also a reference point. The records were analyzed by descriptive statistics, one way and 2 way analysis of variances. We did not observe any statistically significant difference between x and y values of the 2nd and 3rd implants comparing to the 1st implant. In the 4th implant, the difference in length of splinted group was less than nonsplinted group. Within the limitations of the present study, 2 impression materials exhibited no error differences. But, splinted technique produced less error in the 4th implant compared to nonsplinted technique.
K. Seyedan , H. Sazegara , M. Kalalipour and K. Alavi , 2008. Dimensional Accuracy of Polyether and Poly Vinyl Siloxane Materials for Different Implant Impression Technique. Research Journal of Applied Sciences, 3: 257-263.