J Adv Prosthodont.  2011 Dec;3(4):177-185. 10.4047/jap.2011.3.4.177.

Accuracy of five implant impression technique: effect of splinting materials and methods

Affiliations
  • 1Lee Yeon Hab Dental Clinic, Daegu, Korea. leeddsms@hotmail.com
  • 2Plant Dental Clinic, Changwon, Korea.

Abstract

PURPOSE
The aim of this study was to evaluate the effect of dimensional stability of splinting material on the accuracy of master casts.
MATERIALS AND METHODS
A stainless steel metal model with 6 implants embedded was used as a master model. Implant level impressions were made after square impression copings were splinted using 5 different techniques as follows. (1) Splinted with autopolymerizing resin and sectioned, reconnected to compensate polymerization shrinkage before the impression procedure. (2) Splinted with autopolymerizing resin just before impression procedure. (3) Primary impression made with impression plaster and secondary impression were made over with polyether impression material. (4) Splinted with impression plaster. (5) Splinted with VPS bite registration material. From master model, 5 impressions and 5 experimental casts, total 25 casts were made for each of 5 splinting methods. The distortion values of each splinting methods were measured using coordinate measuring machine, capable of recordings in the x-, y-, z-axes. A one-way analysis of variance (ANOVA) at a confidence level of 95% was used to evaluate the data and Tukey's studentized range test was used to determine significant differences between the groups.
RESULTS
Group 1 showed best accuracy followed by Group 3 & 4. Group 2 and 5 showed relatively larger distortion value than other groups. No significant difference was found between group 3, 4, 5 in x-axis, group 2, 3, 4 in y-axis and group 1, 3, 4, 5 in z-axis (P<.0001).
CONCLUSION
Both Splinting impression copings with autopolymerizing resin following compensation of polymerization shrinkage and splinting method with impression plaster can enhance the accuracy of master cast and impression plaster can be used simple and effective splinting material for implant impression procedure.

Keyword

Passive fit; Splinting; Autopolymerizing resin; Impression plaster; VPS bite registration material

MeSH Terms

Compensation and Redress
Humans
Jaw Relation Record
Polymerization
Polymers
Splints
Stainless Steel
Polymers
Stainless Steel
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