Computer Planned Implantology: Analysis of a Case Series
Authors: Matteo Danza, Ilaria Zollino, Riccardo Guidi and Francesco Carinci
Abstract: Purpose: In the last decade, computer software programs and 3D radiographic techniques, have been developed to provide the practitioner with precise implant placement planning. In addition the use of a three-dimensional parallelometer (able to transfer the implant position from the virtual project to the master model) guarantees the precision of the surgical template and the reaching of the prosthetic rehabilitation goal plan. To verify the effectiveness of this system, we planned a retrospective study on a series of fixtures inserted with this computer planned and master model transferred system. Methods: Sixty six fixtures inserted with computer planning, flapless surgery and immediately loaded were analyzed. Several variables related to patient, anatomic site, implant, and surgery were investigated. Implantí failure and peri-implant bone resorption were considered as predictor of clinical outcome. Kaplan-Meier algorithm and Cox regression were then performed to detect those variables statistically associated with the clinical outcome. Results: Sixty six fixtures were inserted in 8 patients. Implant length and diameter ranged from 10 to 16 mm and from 3.75 to 5.0 mm, respectively. Implants were inserted to replace 18 incisors, 14 cuspids, 25 premolars and 9 molars. The mean follow-up was 14 months. No implant was lost and no differences were detected among the studied variables. On the contrary, crestal bone resorption correlates with implantís sites with a better outcome for incisors and cuspids. Computer-planned and cast model transferred implantology is a useful technology, successfully tested in routine clinical application, that can substantially contribute to an increase in quality and intraoperative safety for the insertion of implant.