Effect of interproximal undercut on the dimensional accuracy of impression.
10.4047/jkap.2015.53.4.330
- Author:
Ju Ri LEE
1
;
Seok Gyu KIM
Author Information
1. Department of Prosthodontics, Samsung Medical Center, College of Medicine, Sungkyunkwan University, Seoul, Republic of Korea. seokgyu_k@hanmail.net
- Publication Type:Original Article
- Keywords:
Dental impression materials;
Alginates;
Silicone elastomers
- MeSH:
Alginates;
Dental Impression Materials;
Silicone Elastomers
- From:The Journal of Korean Academy of Prosthodontics
2015;53(4):330-336
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: This study evaluated the effect of loss of interproximal papilla, creating an undercut, on the accuracy of impression materials. MATERIALS AND METHODS: Two addition type silicone impression materials (Extrude(R) Wash, Imprint(TM) II Quick Step Light Body) and one alginate impression material (Cavex Impressional) were used to make impressions of a maxillary master model simulating clinical conditions with or without interproximal papilla. Stone was poured in the impressions and working casts were fabricated. A total of 6 groups with 6 working casts in each group were scanned using 3-dimensional optical scanner. The accuracy of the impressions was assessed by measuring the dimensional changes (DeltaI (%)) of 6 distances on working casts compared to a master model with a 3-dimensional digitizing and inspection software. The data were analyzed by two-way ANOVA (P<.05). RESULTS: Three of 6 distances showed statistically significant differences among the impression materials. Only 1 of 6 distances in alginate impression showed a statistically significant difference between casts with and without interproximal papilla (P=.047). CONCLUSION: The presence of undercut due to loss of interproximal papilla did not significantly influence the dimensional accuracy of addition type silicone and alginate impression materials.
