An Accuracy Study of Computer-Planned Implant Placement in the Augmented Maxilla Using Mucosa-Supported Surgical Templates (original) (raw)
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Accuracy of Computer-aided oral implant surgery: a clinical and radiographic study
Purpose: Computer-aided oral implant surgery offers several advantages over the traditional approach. Th e purpose of this study was to evaluate the in vivo accuracy of computer-aided, template-guided oral implant surgery by comparing the three-dimensional positions of planned and placed implants. Materials and Methods: Oral implant therapy was performed in two treatment centers on eligible patients using computerized tomography (CT)–based software planning and computer-aided design/computer-assisted manufacture stereolithographic templates. A second CT scan was obtained after surgery. Preoperative and postoperative CT images were compared (planned vs actual implant positions), and the accuracy of this type of image-guided therapy was assessed. Results: Twenty-five adult patients were included in this retrospective study; 17 (11 partially and eight fully edentulous arches) were treated in center 1, and eight (six partially and two fully edentulous arches) in center 2. Of the 104 implants inserted with the computer-aided method, 100 integrated, giving a cumulative survival rate of 96% (mean follow-up, 36 months). There were no major surgical complications. With re ga rd to accuracy, 89 implants were available for comparison; mean lateral deviations at the coronal and apical ends of the implants were 1.4 mm and 1.6 mm, respectively. Mean depth deviation was 1.1 mm and mean angular deviation was 7.9 degrees. There was a statistically significant correlation in the accuracy of any implants placed with the same guide. There was no difference in accuracy data fro m the two private centers; nor could a learning curve be demonstrated. Conclusions: Based upon this clinical study of 25 patients, the following observations were made: (1) computer-aided oral implant surgery used in two treatment centers provided a high likelihood (96%) of implant survival, and (2) deviations from planned implant positions existed in the coronal and apical portions of the implants as well as with implant angulation. Mean deviations were less than 2 mm in any direction and less than 8 degrees. INT J ORAL MAXILLOFAC IMPLANTS 2009;24:234–242
The Journal of prosthetic dentistry, 2014
The accuracy of mental navigation is thought to depend on the clinician's spatial ability. Mental navigation, therefore, is associated with deviations between the mental plan and the definitive implant position. To learn more about the deviation that might occur, it is important to evaluate the accuracy of mental navigation during placement of implants. The purpose of the study was to compare accuracy outcomes between virtually planned and conventionally placed implants, and among surgeons with varying experience. Five completely edentulous sets of maxillae and mandibles from human cadaver heads were scanned by computed tomography. Five surgeons planned and placed 60 implants into these jaws, and accuracy was analyzed for 4 parameters: coronal and apical positions, angulation, and depth. The preoperative and postoperative computed tomographies were aligned in voxel-based registration software, which allowed comparison between virtually planned implant positions and actual implan...
Ain Shams Dental Journal, 2021
Statement of problem: The proper implant placement requires a proper and adequate planning for the anatomic limitations and achievement of the best restorative results. The Cone Beam C.T can properly diagnose implant positioning, but transfer of the preplanned position to the surgical field was missed. From there it became mandatory to perform surgical guide to transfer the preplanned position of implants to the surgical field to ensure accuracy of implant placement. Purpose: The interest from this study was to evaluate the accuracy of implant placement using different surgical guides; the surgical guides with closed sleeve versus the surgical guides with open sleeve. After placement of the implants via the surgical guides investigate if there was any deviation of the preplanned implant position with the actual placed implant positioning to evaluate the accuracy of implant placement. Many radiographic techniques had been used to diagnose implant placement positioning, computed tomog...
Accuracy of computer-aided template-guided oral implant placement: a prospective clinical study
Journal of periodontal & implant science, 2014
The aim of the present study was to evaluate the in vivo accuracy of flapless, computer-aided implant placement by comparing the three-dimensional (3D) position of planned and placed implants through an analysis of linear and angular deviations. Implant position was virtually planned using 3D planning software based on the functional and aesthetic requirements of the final restorations. Computer-aided design/computer-assisted manufacture technology was used to transfer the virtual plan to the surgical environment. The 3D position of the planned and placed implants, in terms of the linear deviations of the implant head and apex and the angular deviations of the implant axis, was compared by overlapping the pre- and postoperative computed tomography scans using dedicated software. The comparison of 14 implants showed a mean linear deviation of the implant head of 0.56 mm (standard deviation [SD], 0.23), a mean linear deviation of the implant apex of 0.64 mm (SD, 0.29), and a mean angu...
Evaluation of dental implant placement site in anterior maxilla
International Journal of Applied Dental Sciences, 2021
Background: Successful implant treatment depends on precise planning. Information on the height, width, morphology, and density of alveolar bone surrounding the proposed implant site is very critical for determination of the size of the implant and angle of placement. The present study was conducted to assess anterior maxilla for dental implant placement. Materials & Methods: 45 patients of both genders requiring dental implant in maxillary anterior teeth underwent CBCT scan of anterior maxilla was done with Planmica CBCT machine. Parameters such as bone height, bone width, buccal undercut location and buccal undercut depth was measured. Results: The mean bone height in central incisor region was 18.26 mm, in lateral incisor region was 18.02 mm and in canine region was 23.14 mm. The mean bone width in central incisor region was 9.30 mm, in lateral incisor was 8.45 mm and in canine region was 9.81 mm. The mean buccal undercut location at central incisor was 5.72 mm, at lateral incisor was 3.42 mm and at canine was 5.14 mm. Buccal undercut depth at central incisor was 0.72 mm, at lateral incisor was 0.80 mm and at canine region was 0.71 mm. The difference was significant (P<0.05). Conclusion: Canine region showed maximum bone height and bone width. Maximum buccal undercut was seen in central incisor region.
Accuracy of Implant Placement Using a CAD/CAM Surgical Guide: An In Vitro Study
2011
To determine and compare the accuracy of an advanced surgical template based on computer-aided design/computer-assisted manufacture (CAD/CAM) with the conventional surgical template in different respects such as entry point, length, and osteotomy angle. Materials and Methods: Computed tomography (CT) scanning of a dentate epoxy mandible was performed and its three-dimensional computerized model was simulated. Sixteen rapid-prototyped models were fabricated and divided into two groups. In the first group, a radiographic template was fabricated and placed on the model during CT scanning and then was modified to the conventional surgical template form. In the second group, a coordinate measuring machine was used to reformat a nonanatomic radiographic template fabricated by a stereolithographic machine, and four implants were planned and then placed in the jaw. The differences between planned and actual mesiodistal and buccolingual entry points, lengths, and angles of the implants were measured. Statistical analysis was performed with the Mann-Whitney and Friedman tests to detect differences between groups. Results: The average differences between the planned and actual entry points in the mesiodistal and buccolingual directions, lengths, and angles of the implants and the osteotomy showed a considerable reduction in the CAD/CAM group versus the conventional group (P < .005). Conclusion: The accuracy of implant placement was improved using an innovative CAD/CAM surgical template.