![]() ![]() Stress analysis in edentulous mandibular bone supporting implant-retained 1-piece or multiple superstructures. Yokoyama S, Wakabayashi N, Shiota M, Ohyama T. Evaluation of the effect of implant angulations and impression techniques on implant cast accuracy - An in vitro study. ![]() accuracy, dimensional stability, and ease of manipulation. It is used extensively for crown and bridge procedures because of its. ![]() Polyvinylsiloxane: A very accurate addition silicone elastomer impression. 10.1111/j.Īrora A, Upadhyaya V, Parashar KR, Malik D. Polyether: It is the stiffest of a rubberbase impression material. Long-term evaluation of Astra Tech and Brånemark implants in patients treated with full-arch bridges. Ravald N, Dahlgren S, Teiwik A, Gröndahl K. 10-year survival and success rates of 511 titanium implants with a sandblasted and acid-etched surface: a retrospective study in 303 partially edentulous patients. The casts fabricated from VPS or PVS impression materials provide similar dimensional accuracy regardless of the implant splinting method.ĭimensional accuracy Vinyl polyether silicone Dental implants Direct impressions Polyvinyl siloxane.īuser D, Janner SF, Wittneben JG, Brägger U, Ramseier CA, Salvi GE. Similarly, the differences between the splinted and non-splinted groups among the VPES and PVS materials were not statistically significant. The differences in the distortion values between the VPES and PVS impression materials were not statistically significant. The dimensional accuracies of the casts were measured in three different axes using a computerized coordinate measuring machine (CMM), and were statistically compared. Seventy-two cast samples were divided into four groups based on the impression techniques and materials used. The acrylic resin splinted and non-splinted direct impressions were obtained for both VPES and PVS materials. The present study compared the dimensional accuracy of vinyl polyether silicone (VPES) and polyvinyl siloxane (PVS) impression materials used for non-splinted (NS) and splinted (S) direct open-tray impression techniques for multiple implants inserted in simulated edentulous mandibles.Ī mandibular stainless steel model with eight internal connections for implant analogs was fabricated to simulate a clinical scenario. ![]()
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