Related Experiment Video
Updated: Jan 9, 2026
A Postoperative Evaluation Guideline for Computer-Assisted Reconstruction of the Mandible
Published on: January 28, 2020
The accuracy of static computer-aided implant surgery in four central incisor post-extraction morphologies: An in
Dhafer Saleh Alqahtani1, Vinicius Dutra2, Waldemar D Polido3
1Department of Prosthodontics, Indiana University School of Dentistry, Indianapolis, Indiana, USA.
Purpose:
To evaluate the accuracy of guided surgery in a healed ridge and various maxillary anterior extraction sockets.
Materials And Methods:
Forty radiopaque urethane resin bone models simulating the maxillary right central incisor were fabricated and divided into four groups (n = 10 each). Group H (healed ridge), Group L (socket adjacent to labial cortex), Group C (centralized socket), and Group P (socket adjacent to palatal cortex). Models were scanned using a TRIOS 4 intraoral scanner, and CBCT scans were acquired. Implant planning was performed using software (Codiagnostix), and implants were placed with a fully guided static computer-aided implant surgery (s-CAIS) protocol. Deviations between planned and actual implant positions were measured in global, bucco-lingual, and mesio-distal deviations at the crest and apex.
Results:
Group C showed the greatest global deviation at both the crest (0.83 ± 0.34 mm) and apex (0.98 ± 0.29 mm), whereas Group L showed the lowest global deviations at the crest (0.38 ± 0.17 mm) and apex (0.49 ± 0.26 mm). Angular deviation was highest in Group H (2.91° ± 1.37°) and lowest in Group C (1.87° ± 1.11°). Depth deviations were not statistically different. One-way ANOVA revealed socket morphology significantly influenced global, labial-palatal, and mesial-distal deviations at both crest and apex levels (p < 0.05), with Group L showing superior apical accuracy (p < 0.001).
Conclusions:
Socket morphology significantly affects s-CAIS accuracy. Centralized sockets showed greater positional deviations, particularly at the crest. Socket morphology should be carefully considered during virtual treatment planning for immediate implant placement.
