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Year : 2006  |  Volume : 6  |  Issue : 4  |  Page : 185-189

Comparative evaluation of accuracy of six different implant impression techniques: An in vitro study

Department of Prosthodntics, Meenakshi Ammal Dental College, Chennai, India

Correspondence Address:
Sanjna Nayar
Department of Prosthodontics, Meenakshi Ammal Dental College, Allapakkam Main Road, Chennai
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0972-4052.30693

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AIM: To identify the most accurate impression technique and the ideal impression material to transfer the intra-oral position of implant fixtures to the working cast. MATERIALS AND METHODS: About 30 impressions of the reference model were made using polyvinyl siloxane (Group I) and polyether (Group II) with 15 impressions each. Each group was subdivided into three subgroups based on the trays used; stock metal tray, closed custom tray, and open-window custom tray. Specific dimensions of the resultant casts were measured using coordinated measuring microscope. Mean actual cast error and subgroup's actual cast error was calculated and statistically analyzed using ANOVA. RESULTS: The subgroup's mean actual cast error observed in Group I - A, B, and C was 0.02825 0.0091, 0.01679 0.0055, and 0.08442 0.01516 mm, respectively. The subgroup's mean actual cast error observed in Group II - A, B, and C was 0.03035 0.0164, 0.01924 0.0051, and 0.0212 0.010 mm, respectively. There was no statistical significance between the observed differences. CONCLUSIONS: All the techniques studied showed some distortion and the difference had no statistical significance. The selection of impression technique and impression material can be based on clinical situation and according to the clinician's preference.

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