Dimensional Accuracy of Conventional Impression Materials on Full-Arch Implant Impression

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Koyu T., Coşkun A., Ülgey M., Görler O.

Süleyman Demirel Üniversitesi Sağlık Bilimleri Dergisi, cilt.17, sa.1, ss.1-6, 2026 (TRDizin)

Özet

Objective: The purpose of this in vitro study was to compare conventional impression materials for close tray implant impressions of maxillary full arch with 5 implants. Material and Method: The edentulous maxilla model and custom impression trays were fabricated from auto-polymerizing acrylic resin. 5 implant analogs (Moment Dental Implant Systems, Turkey) representing implants were placed in the midline on the edentulous maxilla model, on both sides canine and first molar region. The study consisted of 4 groups(n=10). Study groups were as follows: group C1 polyvinyl siloxane (Elite HD+ Tray Material; Zhermack Italy); C2 polyvinyl siloxane (HydroriseImplant Heavy&Light NS; Zhermack, Italy); C3 condensation silicone (ZetaplusPutty and Oranwash L; Zhermack, Italy) and C4 polyether (3M ESPE (Soft) Monophase, USA). Conventional impressions were performed with custom-made close trays and casts were made by type IV dental stone. Casts were scanned with the laboratory-type scanner. Whether the data of four separate groups showed a normal distribution was analyzed at the significance level (p = 0.05) using one-way ANOVA analysis using the SPSS 27 program. Results: As a result of the ANOVA analysis, a statistically significant difference was found between the groups (p<0.05). According to the Tukey HSD multiple comparison test results, a statistically significant difference was found between the C4 group and the other groups. The dimensional stability of the Polyether material constituting the C4 group was found to be higher than that of the other groups. Conclusion: Polyvinyl siloxane impression material provides reliable results for impressions of implant-supported prostheses. Rigidity and polymerization shrinkage are thought to reduce the accuracy of polyether impression material.