Date of Award
Spring 4-9-2026
Document Type
Thesis
Degree Name
Master of Science (MS)
Department
Dentistry
First Advisor
Arndt Guentsch
Second Advisor
Moawia Kassab
Third Advisor
Shengtong Han
Fourth Advisor
Vrisiis Kofina
Abstract
Objective: To examine trueness and precision of static computer-assisted implant surgery (sCAIS) across different implant sites, including bounded and unbounded spaces, in vitro. Methods: Stereolithographically printed maxillae and mandibles were fabricated from digitized typodont models and fitted for bone-replicas (sawbone) to create tooth-bounded and unbounded edentulous areas. Bone level tapered implants (4.1 x 10 mm) were digitally planned for sites 18,19 (mandible, posterior unbounded), 23,26 (mandible, anterior bounded) and 29,30 (mandible, posterior bounded) and 3,4 (maxilla posterior unbounded) and 8, 9, (maxilla, anterior bounded), and 13, 14, 15 (maxilla posterior unbounded). Models were mounted in a dental phantom with a face mask to simulate clinical access and operator positioning. Surgical guides were fabricated and implants were placed using a fully guided protocol. Postoperative implant positions were digitized and compared with the planned position (reference). Angular deviation was the primary outcome parameter. Statistical analysis included ANOVA and paired t-tests (α =0.05). Results: Angular deviation was greatest in maxilla posterior unbounded sites (2.52 ± 0.79°). Maxillary anterior bounded sites showed lower deviation (1.19 ± 0.62°) than posterior bounded sites (2.50 ± 1.06°, p<0.001). Similarly, in the mandible, posterior unbounded sites demonstrated greater angular deviation than posterior bounded sites (2.15 ± 1.01° vs 1.50 ± 0.69°, p=0.09) and anterior bounded spaces (1.47±0.59, p=0.07 and p=1.0). Conclusion: Implant site significantly affects sCAIS accuracy. In general, the accuracy was higher in the mandible in comparison to the corresponding spaces in the maxilla. Anterior bounded spaces demonstrate the highest accuracy, followed by posterior bounded spaces, with posterior unbounded sites showing the greatest deviation.