Positional accuracy during the sequence of static computer-assisted implant surgery in three alveolar ridge morphologies: an in vitro study.

Raabe, Clemens; Abou-Ayash, Samir; Yilmaz, Burak; Surbek, Fiona Jennifer; Chappuis, Vivianne; Couso Queiruga, Emilio (2023). Positional accuracy during the sequence of static computer-assisted implant surgery in three alveolar ridge morphologies: an in vitro study. (In Press). Journal of prosthodontics Wiley 10.1111/jopr.13798

Text Journal_of_Prosthodontics_-_2023_-_Raabe_-_Positional_accuracy_during_the_sequence_of_static_computer_assisted_implant.pdf - Accepted Version Restricted to registered users only until 13 November 2024. Available under License Publisher holds Copyright. Download (8MB)

PURPOSE

This in vitro study aimed to assess the positional accuracy during the sequence of static Computer-Assisted Implant Surgery (sCAIS) according to the anatomical characteristics of the alveolar ridge.

MATERIAL AND METHODS

Maxillary bone models with six single tooth gaps including clinical scenarios of healed alveolar ridge (HR), single-rooted (SRS), and three-rooted socket (TRS) morphologies were used in this study. Positional deviations during implant placement procedures were evaluated after the pilot osteotomy (PD), final osteotomy (FD), and implant placement with respect to the pre-planned implant position by using a software package. ANOVA and post hoc analyses were performed.

RESULTS

Ninety implants were included in this study. Higher mean angular, crestal, and apical deviations were found after the PD and FD (3.5 ±2.4°, 0.7 ±0.3mm, and 1.4 ±0.8mm versus 3.6 ±2.2°, 0.6 ±0.3mm, and 1.2 ±0.6mm) compared to IP (2.8 ±1.6°, 0.7 ±0.3mm, and 1.2 ±0.5mm, p≤0.004). Implants placed in TRS demonstrated higher mean angular, crestal, and apical deviations (4.0 ±1.7°, 0.8 ±0.3mm, and 1.6 ±0.5mm) compared to implants placed in SRS (2.5 ±1.2°, 0.7 ±0.3mm, and 1.1 ±0.4mm) or HR (2.0 ±0.9°, 0.5 ±0.3mm, and 0.8 ±0.4mm, p<0.001).

CONCLUSIONS

Positional deviations during sCAIS procedures are initiated with the first implant osteotomy and persist throughout the drilling sequence. However, deviations slightly decreased after implant placement. The alveolar ridge morphology is strongly associated with positional deviations. Higher deviations were observed in three-rooted and single-rooted sockets simulating an immediate approach compared to healed sites simulating a delayed protocol. This article is protected by copyright. All rights reserved.

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