Abstract
A distal free-end situation could result in insufficient stability of the surgical guide, and could reduce accuracy of the static guided implant surgery (sGIS). The purpose of this study was to investigate the accuracy of sGIS using a combination tooth-and-bone supported stereolithographic (SLA) surgical guide in distal extension situation. Thirty dentists, each placed three implants at the Federal Dentaire Internationale (FDI) teeth positions #46, #47 (a distal extension situation), and #36 (a single tooth gap) via the surgical guide on a model fixed to a manikin. Pre- and post-operative computed tomography (CT) images of the models were superimposed, and the positional and angular deviations of the implants were measured with metrology software. An analysis of variance (ANOVA) test was performed to evaluate the intergroup differences. No significant differences were found for all the positional and angular deviations among the three implant sites, except the bucco-lingual deviation at the implant platform in the #47 position (0.43 ± 0.19 mm) that was significantly larger than the #46 (0.21 ± 0.14 mm) and #36 (0.24 ± 0.25 mm) positions (p < 0.0001). Within the limits of this study, we conclude that, in distal extension situation of missing mandibular molars, adding a bone-supported strut in the distal part of the surgical guide can be beneficial to the accuracy of the sGIS.
Highlights
The introduction of static guided implant surgery has been beneficial to optimize and facilitate the implant planning and positioning [1]
The purpose of the present study was to investigate the accuracy of computer-guided implant surgery in distal extension situation, using this combination tooth-and-bone supported stereolithographic (SLA) surgical guide
The results of this study revealed that, for mandibular partial edentulism of molars, placing dental implants in the first molar site by the combination tooth-and-bone supported surgical guide is as accurate as by a bilaterally tooth-supported surgical guide
Summary
The introduction of static guided implant surgery (sGIS) has been beneficial to optimize and facilitate the implant planning and positioning [1]. Using three-dimensional planning software, a virtual implant treatment plan can be made and transferred to the patient via surgical templates or surgical guides in implant surgery. The ideal implant position can be attained, and it helped to avoid damaging the surrounding anatomical structures [2]. Kuhl et al [5] reported that using printed templates for guided implant surgery could achieve a high accuracy in terms of implant positioning. Testori et al [7] suggested that a safe distance of at least 2 mm was needed between implants and anatomic structures when planning computer-guided implant surgery
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