Evaluation of the Effectiveness of APRF and TriCalcium Phosphate Compound in Bone Grafting after External Sinus Lifting. (Radiological Study)

Abstract

Background & Aim: Maxillary sinus grafting is the most common surgical technique to secure sufficient bone height in order to place dental implants in the posterior region of the maxilla, the procedure is done through two basic techniques, either by making a window in the lateral wall of the maxillary sinus (external sinus lift) or through the alveolar entrance technique by alveolar osteotomes (internal sinus lift).

The external sinus lift can be done, either by one stage (grafting and implanting) or through two stages (grafting, then placing the implants in a second stage), depending on the quality and volume of the remaining bone.

This research aim To evaluate the bone gain and reduction after applying Tri-Calcium Phosphate mixed with A-PRF in external sinus lifting operations within delayed dental implantation.

Materials and methods: This research sample consisted of 9 maxillary sinuses in 9 patients, where maxillary sinus lifting was performed, then the area was grafted with Tri-Calcium Phosphate graft mixed with A-PRF. Bone gain and bone reduction that occurred in the area were evaluated by CBCT for each patient in three stages (before procedure, immediately after procedure, and finally 6 months after procedure).

Results: The average bone height before surgery was (3.859±1.728) mm, and the gain in height immediately after surgery (both bone and bone graft) was (14,185±3.025) mm, where it changed, six months after surgery to (11,391±0.934) mm, and in the statistical study, a statistical significant difference was found between the study stages for the graft, where P value was <0.05 between each two stages of the study. Including the comparison between the pre-surgical stage and six months after surgery, where the average difference was (7.352±1.148) mm and was statistically significant, which indicates the effectiveness of applying Tri-Calcium Phosphate mixed with A-PRF in external sinus lifting operations.

Conclusion: Using Calcium Phosphate mixed with A-PRF provided sufficient bone gain for dental implantation, when it is used in external sinus lifting operations and delayed implantation.