Abstract
Accuracy of the implant impression technique is one of the key factor determining the strain free fit of the prosthesis fabricated which influences the treatment success. Two implant impression techniques namely the closed tray technique with transfer coping and open tray technique were evaluated for accuracy with stone casts obtained from them. Casts were evaluated using a custom constructed bar on strain gage (SYSCOM) and abutment coordinates using Coordinate Measuring Machine (TESA micro-HITE). The statistical analysis with one way ANOVA and Mann–Whitney tests show that the casts obtained with open tray technique were accurate than the casts of closed tray technique (significance P < 0.001). Direct transfer impression technique with less number of components ensures the high accuracy of transfer of implant positions from master cast to the laboratory cast compared to the indirect transfer impression technique.
Similar content being viewed by others
References
Waskewicz GA et al (1994) Photoelastic analysis of stress distribution transmitted from a fixed prosthesis attached to osseointegrated implants. Int J Oral Maxillofac Implants 9(4):405–411
Humphries RM, Bloem TJ (1990) The accuracy of implant master casts fabricated for transfer impressions. Int J Oral Maxillofac Implants 5:331–336
Herbst D et al (2000) Evaluation of impression accuracy for osseointegrated implant supported superstructures. J Prosthet Dent 83:555–561
Assif D et al (1996) Accuracy of implant impression techniques. Int J Oral Maxillofac Implants 11(2):216–222
Carr AB (1991) A comparison of impression techniques for a five-implant mandibular model. Int J Oral Maxillofac Implants 6(4):448–455
Conrad HJ et al (2007) Accuracy of two impression techniques with angulated implants. J Prosthet Dent 97:349–356
Burns J et al (2003) Accuracy of open tray implant impressions: an in vitro comparison of stock versus custom trays. J Prosthet Dent 89:250–255
Wee AG (2000) Comparison of impression materials for direct multi-implant impressions. J Prosthet Dent 83:323–331
Vigolo P, Majzoub Z, Cordioli G (2003) Evaluation of the accuracy of three techniques used for multiple implant abutment impressions. J Prosthet Dent 89:186–192
Riedy SJ et al (1997) Fit of implant frameworks fabricated by different techniques. J Prosthet Dent 78:596–604
Akça K, Cehreli MC et al (1999) Accuracy of two impression techniques for ITI implants. Int J Oral Maxillofac Implants 14:885–888
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
BalaMurugan, T., Manimaran, P. Evaluation of Accuracy of Direct Transfer Snapon Impression Coping Closed Tray Impression Technique and Direct Transfer Open Tray Impression Technique: An In Vitro Study. J Indian Prosthodont Soc 13, 226–232 (2013). https://doi.org/10.1007/s13191-012-0141-x
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s13191-012-0141-x