Assessment of the accuracy of computer generated surgical guide stent for implant placement using the all on four concept /
تقييم دقة استخدام الاستعاضة التوجيهية المولدة من خلال الحاسوب لغرس زرعات اسنان بمبدأ - طقم كامل على اربع زرعات
Hesham Osama Ragueh Saleh Morsi ; Supervised Dalia Abdel Khalek Radwan , Mohamed Ahmed Farid Shehab , Amr Hussny Elkahdem
- Cairo : Hesham Osama Ragueh Saleh Morsi , 2014
- 155 P. : facsimiles ; 25cm
Thesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Oral and Maxillofacial Surgery
Objective:The aim of the current study is to evaluate accuracy of computer and image guided implant placement using 3D printed Surgical Guiding Template for the all on four treatment option configuration concept. Patients and methods:six patients with completely edentulous mandibles were scanned with Cone-beam computed tomography (CBCT). Data was used for virtual placement, and production of surgical guiding template (SGT) with rapid prototyping for transfer of virtual plan to surgical field. Each patient received four implants each, making a total of 24 implants. Immediate post-operative CBCT was taken for all patients and the acquired image data set of each patient was merged with the pre-operative set to evaluate amount of error/deviation between virtual and post-operative implants. Results:The overall amount of error deviation showed a median of 2.05 mm in linear measurements. Axial error deviation showed a median of 3.79. Height discrepancies from linear measurements showed a median and range of 0.99 mm and 0.33 2.99 mm. Anterior-posterior displacement showed a Median (Range) of 0.81 mm (0.27 1.17 mm). The median of linear values of error deviation in the anterior implants measured in mm was 2.05 mm and those of the posterior implants was 1.69 mm which is statistically significant with a Pvalue = 0.05. The same was interpreted from observing the 3D changes of error deviation with a P-value 0.019 when comparing anterior and posterior 3D measurements. Height difference showed no statistical significant difference when comparing anterior and posterior data, having a median of 1.25 mm and 0.78 mm respectively with a P-value = 0.316.