تغيرات الكثافة الشعاعية التالية لاخذ الطعم العظمي من الذقن لاغراض الزرع السني بواسطة السنابل المنشارية الكبيرة

Background & Objective: Chin area is considered as a suitable donor site for autogenous bone grafts for alveolar ridge reconstruction before dental implantation, using large trephine bur(10mm) considers one of several ways which appeared for bone graft harvesting. The aim of this search is to study radiographic density changes following chin bone harvesting for dental implantology by using large trephine bur depending on digital panoramic radiographs Material & Methods: 14 chin bone grafts for 12 patients (2 males ,10 females ,mean age 39 years)suffering of rogressive resorption in the posterior mandible were harvested by 10mm diameter trephine bur through buccal incision between canines . Radiological study was performed on digital panoramic radiographs acquired preoperatively, directly, and(3,6,9)months postoperatively . Mean Radiographic density in (ROI) Region of Interest was calculated by (Digora for Windows Version 2.7 software)after processing radiographs by Adobe Photoshop Eliments 9 software. Student’s t-test was used at the level of significance P < 0.05 for statistical analysis. Results: Our study revealed no significant differences between Mean Radiographic density directly and 3months postoperative. Radiographic density increased between 3 and 9 months postoperatively but clearly during period between 3 and 6 months. Radiographic density measurements preoperative and 9 months postoperative were almost the same. Conclusions: When using 10mm trephine bur for chin bone harvesting, radiographic density in bone harvesting region (chin) in digital panoramic radiographs comes again after 9 months to be almost the same as preoperative