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Effects of Implant Angulation and Impression Coping Type on the Dimensional Accuracy of Impressions.

Shim, Ji Suk; Ryu, Jae Jun; Shin, Sang Wan; Lee, Jeong Yol.
Implant Dent; 24(6): 726-9, 2015 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-26384100

PURPOSE:

To analyze the accuracy of impressions in relation to implant angulation and type of impression coping.

MATERIALS AND METHODS:

Three metal master models with 2 implants of 3 different angulations (parallel, mesiodistal, and buccolingual) were fabricated. Nine groups of experimental models were fabricated to duplicate the 3 master models using 3 types of impression copings: transfer, pick-up, and hybrid. The distance between the analogs for each model was measured using a video measuring system. The influence of angulation and type of impression coping was analyzed by a two-way ANOVA (P < 0.05).

RESULTS:

There were significant differences in error rates in relation to implant angulation and type of impression coping (P < 0.05). Impressions of buccolingually divergent implants with transfer copings showed statistically higher error rates than other groups (P < 0.05).

CONCLUSIONS:

Buccolingual divergence can be a variable that influences the impression accuracy of transfer copings compared with pick-up and hybrid copings. Hybrid copings demonstrate reasonable reproducibility similar to that of pick-up copings.