الفهرس | Only 14 pages are availabe for public view |
Abstract Aim: The aim of this study was to compare the accuracy of implant placement when using tooth supported surgical guide with different distributions of support manufactured by DLP (Digital Light Processing) technique. Methodology: Twenty four replica implants were inserted in twelve partially edentulous maxillary resin casts. implant placement was done using static DLP printed surgical guides. Three designs of surgical guides were designed representing different number and distribution of support (unilateral tooth support), (bilateral tooth support), and (full arch tooth support). After implant placement; accuracy measurements were done using (blue sky bio software) by superimposing the actually placed implants with the virtually planned implants. The deviations between placed and planned implants were then measured according to the following definitions: The global deviation which was divided into vertical (depth deviation), and lateral deviations according to the longitudinal axis of the planned implants. Moreover, the lateral deviation was further divided into mesio-distal and bucco-lingual deviations and angular deviation. Results: In the present study the most accurate group was bilateral tooth supported group as bilateral distribution of support was found to offer similar accuracy that achieved by full-arch guides but for unilateral tooth supported group not considered the best support for surgical. The study also showed the effect of added fixation screw in the edentulous area which directly express the effect of reducing bending of the unsupported part of the surgical guides. Conclusion 1-Using bilateral tooth support offer same accuracy of full arch guides. On the other hand using unilateral tooth support not considered to offer the best support for surgical guides compared to similar number of support in free end saddle cases. 2-Regarding single tooth replacement in distal extension cases, using unilateral support resulted in higher significant deviation value which considered the maximum limit of the permitted errors. Keywords: Surgical guide, CAD\CAM, Implant, Accuracy, 3D printing. |