Comparison of Dental Surface Image Registration and Fiducial Marker Registration: An In Vivo Accuracy Study of Static Computer-Assisted Implant Surgery.

Yen-Ting Han,Fang-Yu Fan,Chih-Long Chen,Wei-Chun Lin,Hsin-Chung Cheng,Hsin-Chung Cheng,Chia-Cheng Lin

doi:10.3390/jcm10184183

Abstract

This study compared the accuracy of static computer-assisted implant surgery (sCAIS) planned through dental surface image registration and fiducial marker registration. Stone models of 30 patients were converted into digital dental casts by using a desktop scanner. Cone-beam computed tomography (CBCT) was performed and superimposed to the digital dental casts with two methods: matching the dental surface images or matching the fiducial markers on a stereolithographic radiographic template. Following the implant planning, stereolithographic surgical guides were fabricated, and 56 fully guided implants were inserted by the same doctor. Deviations between planned and inserted implants were measured and compared using postoperative CBCT images. After adjustment for other potential influencing factors, compared with the fiducial marker registration group, significantly larger mean lateral deviations were noted in the dental surface registration group at both the implant platform and apex (p = 0.0188 and 0.0371, respectively). However, the mean lateral deviations for the dental surface registration (0.83 ± 0.51 mm at implant platform and 1.24 ± 0.68 mm at implant apex) were comparable to the literature. In conclusion, our findings indicate that although sCAIS planned using dental surface image registration was not statistically as accurate as that using fiducial marker registration, its accuracy was satisfactory for clinical use.

Highlights

Dental implants have been extensively used for both functional and esthetic rehabilitation in dentistry, and a correct three-dimensional (3D) implant position is essential for an optimal esthetic outcome and long-term functional success of implant reconstruction [1]
The null hypothesis was that static computer-assisted implant surgery (sCAIS) planned through dental and compared sCAIS accuracy planning with dental surface registration and fiducial surface registration is as accurate as that planned through fiducial marker registration
With regard to the planning procedure of matching the digital dental cast and cone-beam computed tomography (CBCT) image, 22 patients were based on dental surface registration, and 8 were based on fiducial marker registration (4 partially edentulous and 4 fully edentulous patients)

Summary

Introduction

Dental implants have been extensively used for both functional and esthetic rehabilitation in dentistry, and a correct three-dimensional (3D) implant position is essential for an optimal esthetic outcome and long-term functional success of implant reconstruction [1]. To achieve this goal, an appropriate implant position and angulation in relation to the surrounding bone and remaining teeth is critical. Computer-assisted implant surgery allows optimal prosthetic and surgical treatment planning and accurate implant placement according to the patient’s anatomic condition [6] It helps in identifying anatomically sensitive structures and avoiding surgical complications such as sinus perforation and mandibular nerve injury [5]

Results

Discussion

Conclusion