The research of dental surgical guide design using geometric conversion method
| Autor: | Yao-TePeng, 彭耀德 |
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| Rok vydání: | 2017 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 106 Dental implants are widely used in the restoration of missing teeth. Successful implant surgery not only considers osseointegration between implant and bone but also places considerable emphasis on the esthetic appearance of the restored tooth. A dental surgical guide is used to help the dentist place the dental implant quickly, accurately, and with minimal invasion. Through preoperative evaluation and virtual implant planning in the edentulous region, dentists can place an implant in the optimal position by following the guide holes in the surgical guide. The guide is generally fabricated through three-dimensional (3D) printing. However, the stability of a 3D-printed guide is sensitive to, and influenced by, the threshold value setting in the image process software and errors in the 3D printing procedure. Moreover, the cost of a 3D-printed guide for clinical applications is high. Thus, an accurate, fast, and low-cost method for producing surgical guides remains a clinical requirement. To this end, this study proposes a geometric conversion method (GCM) to measure the planned implant position in projection planes. Using this conversion information, the planned implant positions can be transformed into a surgical guide using a drilling machine. In vitro and in vivo tests were designed to validate the GCM guide. The in vitro test was applied to compare the accuracy of the GCM guide and the 3D-printed guide by employing edentulous models (implant sites: 32, 36, 45, and 47). The in vitro test revealed no significant differences (p 〉 0.05) in the planned and placed angulations between the GCM guide and the 3D-printed guide. In the GCM guide, the deviation between the planned and placed implants was 0.65 ± 0.39 mm in the implant head, 0.81 ± 0.33 mm in the implant apex, and 0.76° ± 0.51° in 3D angulation. In the 3D-printed guide, the deviation between the planned and placed implants was 0.44 ± 0.22 mm in the implant head, 0.66 ± 0.37 mm in the implant apex, and 0.58° ± 0.32° in 3D angulation. For the in vivo test, nine edentulous patients were selected to receive GCM-guided surgery. The results indicated that GCM guide could achieve the 3D offset deviations of 1.03±0.27mm and 1.17±0.24mm at the implant head and apex, respectively and 1.37°±0.21°for the 3D angulation. These results evidence the accuracy of the GCM, and it is therefore a feasible method for transforming a radiographic guide into a surgical guide. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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