Are Sleeves Necessary in Static Computer-Assisted Implant Surgery? A Comparative In Vitro Analysis

Document Type

Article

Publication Date

10-2024

Publisher

Wiley

Source Publication

Clinical Oral Implants Research

Source ISSN

0905-7161

Original Item ID

DOI: 10.1111/clr.14368

Abstract

Objectives

This study aims to examine differences in trueness and precision between surgical guides with (S) and without sleeves (SL). A secondary aim was to assess the impact of the sleeve-to-bone distance.

Materials and Methods

Mandible replicas (n = 120) were printed from an STL file obtained from a clinical CBCT. The mandibles were divided into sleeved (S, n = 60) and sleeveless (SL, n = 60) groups, each further divided into three categories (n = 20 each) with different heights from the guide to the implant platform: 2 mm (H2), 4 mm (H4), or 6 mm (H6). Digital planning and surgical guide design were done for a 4.1 × 10 mm implant for site #30. Post-op positions were captured using a scan body and lab scanner. Angular deviation was the primary outcome, with 3D and 2D deviations as secondary parameters. Statistical analysis included two-sample t-tests, and one-way and two-way ANOVA.

Results

Group S (2.41 ± 1.41°) had significantly greater angular deviation than Group SL (1.65 ± 0.93°; p = 0.0001). Angular deviation increased with sleeve-to-bone distance. H2 deviations were 1.48 ± 0.80° (S) vs. 1.02 ± 0.45° (SL; p <  0.05), H4: 2.36 ± 1.04° (S) vs. 1.48 ± 0.79° (SL; p <  0.05), H6: 3.37 ± 0.67° (S) vs. 2.46 ± 0.89° (SL; p <  0.05). 3D deviation at the implant platform was 0.36 ± 0.17 mm (S) vs. 0.30 ± 0.15 mm (SL; p <  0.05) and at the apex 0.74 ± 0.34 mm (S) vs. 0.53 ± 0.31 mm (SL; p <  0.01). Group SL at H2 had the smallest inter-implant distance (0.53 ± 0.37°), while Group S at H4 had the largest (1.20 ± 0.84°; p <  0.05).

Conclusions

Sleeveless guides are more accurate than sleeved guides, and angular deviation is influenced by the distance from the guide to the implant platform.

Comments

Clinical Oral Implants Research, Vol. 36, No. 1 (2024, October): 117-126. DOI.

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