Implant Dentistry

Skip Navigation LinksHome > June 2013 - Volume 22 - Issue 3 > Accuracy of Definitive Casts Using 4 Implant-Level Impressio...
Implant Dentistry:
doi: 10.1097/ID.0b013e3182920dc5
Basic and Clinical Research

Accuracy of Definitive Casts Using 4 Implant-Level Impression Techniques in a Scenario of Multi-Implant System With Different Implant Angulations and Subgingival Alignment Levels

Martínez-Rus, Francisco DDS, PhD*; García, Carmen DDS, PhD; Santamaría, Andrea DDS, PhD; Özcan, Mutlu DDS, Dr Med Dent, PhD; Pradíes, Guillermo DDS, PhD§

Collapse Box


Purpose: To evaluate the effect of various implant-level impression techniques on the accuracy of definitive casts for a multiple internal connection implant system with different implant angulations and subgingival depths.

Material and Methods: Six tapered Screw-Vent implants were placed in a reference model with different angles (0, 15, and 30 degrees) and subgingival positions (0, 1, and 3 mm). Twenty medium-consistency polyether impressions of this model were made with 4 techniques (n = 5 per group): (1) indirect technique, (2) unsplinted direct technique, (3) acrylic resin-splinted direct technique, and (4) metal-splinted direct technique. Impressions were poured with type IV dental stone. The interimplant distances were measured for casts using a coordinate measuring machine and the deviations compared with the reference model were calculated. Data were analyzed using intraclass correlation coefficient, ANOVA and Bonferroni test (α = 0.05).

Results: Four impression procedures showed significant differences (P = 0.0001). Only group 4 casts showed no significant differences in comparison with the reference model (P = 0.666) (ANOVA repeated measures).

Conclusions: The impression procedure affected the accuracy of definitive casts. The metal-splinted direct technique produced the most accurate casts, followed by acrylic resin-splinted direct, indirect, and unsplinted direct techniques.

© 2013 by Lippincott Williams & Wilkins, Inc.


Article Tools


Article Level Metrics

Search for Similar Articles
You may search for similar articles that contain these same keywords or you may modify the keyword list to augment your search.