Abstract
Implant surgery with surgical guide has been introduced with a concept of position improvement. The surgery might be considered as easy even for inexperienced clinician because of step simplicity. However, there are residual risks, resulting in postoperative complications. The aim of this study was to assess the accuracy of implant surgery with surgical guide by inexperienced clinicians in in vitro. After preoperative computed tomographies (CTs) of five artificial models of unilateral free‐end edentulism with scan templates, five surgical guides were established from templates. Following virtual planning, 10 implants were placed in the 45 and 47 regions by five residents without any placement experiences. All drillings and placements were performed using surgical guides. After postoperative CTs, inaccurate verifications between virtual and actual positions of implants were carried out, by overlaying of pre/postoperative CT data. The angle displacement of implant axis in the 47 region was significantly larger than that in the 45 region (P = 0.031). The 3D offset of implant base in the 47 region was significantly larger than that in the 45 region (P = 0.002). For distal/apical directions, displacements of base in the 47 region were significantly larger than those in the 45 region (P = 0.004 and P = 0.003, respectively). The 3D offset of implant tip in the 47 region was significantly larger than that in the 45 region (P = 0.003). For distal/apical directions, displacements of tip in the 47 region were significantly larger than those in the 45 region (P = 0.002 and P = 0.003, respectively). Within limitations of this in vitro study, data for accuracy of implant surgery with surgical guide would be informative for further studies, because in vitro studies should be substantially made to avoid unnecessary burden of patients, in advance of retro/prospective studies. A comparison of the accuracy in this in vitro model between by inexperienced and well‐experienced operators should be necessary for clinicians intending to use surgical guide for placement.
Highlights
Implant surgery with surgical guide gains more and more importance in implant dentistry (Ewers et al 2005; Hammerle et al 2009)
A comparison of the accuracy of implant surgery with surgical guide in this in vitro model between the inexperienced and well-experienced operators should be necessary for clinicians who would intend to use surgical guide for implant placement
The results of this study show that the accuracy of the actual position of placed implant in the 47 region was significantly worse than that in the 45 region in artificial mandible models of unilateral free-end edentulism
Summary
Implant surgery with surgical guide gains more and more importance in implant dentistry (Ewers et al 2005; Hammerle et al 2009). It is a key goal of the surgery with the guide to obtain a maximum accuracy by transferring the virtual implant position into the clinical situation (Arisan et al 2010). The surgery requires several steps as follows; fabrication of a radiographic template, computed tomography (CT) acquisition with the template in position, computer-assisted planning of implant placement and ending in fabrication, and the use of surgical guide for drilling and implant placement.
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