The Effects of Distribution of Image Matched Fiducial Markers on Accuracy of Computer-Guided Implant Surgery.

PURPOSE Image registration of the optical intraoral scan to computed tomography image is essential for computer-guided implant surgery. The remaining teeth, which are considered to be congruent structures observed in the scan and radiographic images, are used to perform the image registration. The purpose of this study was to evaluate the effects of the distribution of matching fiducial points on the accuracy of the image registration. MATERIALS AND METHODS A partially edentulous model that has three anterior remaining teeth was prepared. Two mini dental implants were inserted in the posterior edentulous areas on both sides, and computed tomography and surface scan data were obtained. Three groups were set according to the distribution of the image matching points used: localized distribution, unilateral distribution, and bilateral distribution. Fifteen graduate students performed the registration process in each group using the same image matching method. The accuracy of image registration was evaluated by measuring the geometric discrepancies between the radiographic and registered scan images in the anterior, middle, and posterior regions. One-way and two-way analysis of variance with the Tukey HSD post hoc test were used for statistical analysis (α = 0.05) RESULTS: In general, the registration discrepancy was lowest in the bilateral distribution group, followed by the unilateral distribution and localized distribution groups (p<0.001). In the regional analysis, the registration error tended to increase as the measurement region moved farther from the matching points. The distribution of the matching points and measurement regions had a statistical interaction in the accuracy of image registration. CONCLUSION The accuracy of image registration of the surface scan to the computed tomography is affected by the matching point distribution that can be improved by placing artificial markers in the edentulous areas. This article is protected by copyright. All rights reserved.

[1]  Daniel Amaral Alves Marlière,et al.  Accuracy of computer-guided surgery for dental implant placement in fully edentulous patients: A systematic review , 2018, European Journal of Dentistry.

[2]  Paul J. Besl,et al.  A Method for Registration of 3-D Shapes , 1992, IEEE Trans. Pattern Anal. Mach. Intell..

[3]  Diego Antonio Sigcho López,et al.  Potential Deviation Factors Affecting Stereolithographic Surgical Guides: A Systematic Review , 2019, Implant dentistry.

[4]  Byung-Ho Choi,et al.  Digital Workflow for Computer-Guided Implant Surgery in Edentulous Patients: A Case Report. , 2017, Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons.

[5]  Du-Hyeong Lee,et al.  Non‐Radiological Method for Fabrication of a Screw‐Channel Drilling Guide in Cement‐Retained Implant Restorations Using Intraoral Digital Scanning and Imaging Superimposition: A Clinical Report , 2017, Journal of prosthodontics : official journal of the American College of Prosthodontists.

[6]  A. Greenberg.  Digital technologies for dental implant treatment planning and guided surgery. , 2015, Oral and maxillofacial surgery clinics of North America.

[7]  P. Mozzo,et al.  A new volumetric CT machine for dental imaging based on the cone-beam technique: preliminary results , 1998, European Radiology.

[8]  J. D'haese,et al.  Accuracy and complications using computer-designed stereolithographic surgical guides for oral rehabilitation by means of dental implants: a review of the literature. , 2012, Clinical implant dentistry and related research.

[9]  S. Bergé,et al.  Validation of 3D documentation of palatal soft tissue shape, color, and irregularity with intraoral scanning , 2017, Clinical Oral Investigations.

[10]  R. Tallents,et al.  Surgical templates for prosthetically guided implant placement. , 2004, The Journal of prosthetic dentistry (Print).

[11]  Nikolaus Behneke,et al.  Factors influencing transfer accuracy of cone beam CT-derived template-based implant placement. , 2012, Clinical oral implants research.

[12]  Bassam Hassan,et al.  Registration of cone beam computed tomography data and intraoral surface scans – A prerequisite for guided implant surgery with CAD/CAM drilling guides , 2016, Clinical oral implants research.

[13]  Tabea V Flügge,et al.  The accuracy of computer guided implant surgery with tooth supported, digitally designed drill guides based on CBCT and intraoral scanning. A prospective cohort study. , 2019, Clinical oral implants research.

[14]  N. Van Assche,et al.  Accuracy assessment of computer-assisted flapless implant placement in partial edentulism. , 2010, Journal of clinical periodontology.

[15]  Ignace Naert,et al.  Guided surgery: accuracy and efficacy. , 2014, Periodontology 2000.

[16]  C. Monaco,et al.  Implant Digital Impression in the Esthetic Area. , 2018, Journal of prosthodontics : official journal of the American College of Prosthodontists.

[17]  Rainer Schmelzeisen,et al.  Three-dimensional plotting and printing of an implant drilling guide: simplifying guided implant surgery. , 2013, Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons.

[18]  Hom-lay Wang,et al.  Accuracy of flapless immediate implant placement in anterior maxilla using computer‐assisted versus freehand surgery: A cadaver study , 2018, Clinical oral implants research.

[19]  J. Cosyn,et al.  A randomized controlled study on the accuracy of free‐handed, pilot‐drill guided and fully guided implant surgery in partially edentulous patients , 2018, Journal of clinical periodontology.

[20]  June-Sung Shim,et al.  Accuracy of intraoral digital impressions using an artificial landmark , 2017, The Journal of prosthetic dentistry.

[21]  Carlos Lopez-Suarez,et al.  Combined Stereophotogrammetry and Laser-Sintered, Computer-Aided Milling Framework for an Implant-Supported Mandibular Prosthesis: A Case History Report. , 2018, The International journal of prosthodontics.

[22]  Xiuyin Zhang,et al.  Factors that Influence Direction Deviation in Freehand Implant Placement. , 2019, Journal of prosthodontics : official journal of the American College of Prosthodontists.

[23]  S. Heo,et al.  A survey of the satisfaction of patients who have undergone implant surgery with and without employing a computer-guided implant surgical template , 2014, The journal of advanced prosthodontics.

[24]  Byung-Ho Choi,et al.  Digital Workflow for Computer-Guided Implant Surgery in Edentulous Patients with an Intraoral Scanner and Old Complete Denture. , 2019, Journal of prosthodontics : official journal of the American College of Prosthodontists.

[25]  Predrag Sukovic,et al.  Accuracy of implant placement with a stereolithographic surgical guide. , 2003, The International journal of oral & maxillofacial implants.

[26]  Markus B Blatz,et al.  Precision for computer-guided implant placement: using 3D planning software and fixed intraoral reference points. , 2007, Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons.

[27]  Sompop Bencharit,et al.  In-office fabrication of dental implant surgical guides using desktop stereolithographic printing and implant treatment planning software: A clinical report. , 2017, The Journal of prosthetic dentistry.