Evaluation the Effectiveness of Calcium Sulphate in Bone Grafting after External Sinus Lifting within Dental Implantation (Radiological Study)

Abstract

Background & Aim: Placing implants in the posterior maxillary area is complicated by a lack of bone volume as a result of the maxillary sinus pneumatization which occurs because of alveolar bone resorption after tooth extraction, therefore, various methods and techniques were applied by researchers to avoid these difficulties, such as horizontal and vertical bone grafting. The alloplastic bone grafts are considered as an important material in external sinus lifting because it is easily used and plentiful, and they also don’t require an additional surgical procedure which is applied in autogenous bone grafting.

This research aim to Evaluate Calcium Sulphate as a bone graft through the assessment of bone dimensions' changes (Bone gain and bone reduction), when Calcium Sulphate mixed with A-PRF is applied in external sinus lifting in delayed implantation.

Materials and methods: Bone dimensions' radiological changes (Bone gain and bone reduction) were evaluated to 9 patients (9 maxillary sinuses) by performing 3 CBCT images for each patient in three stages (before surgery, immediately after surgery and 6 months after surgery).

These 9 patients were undergone an external sinus lifting using Calcium Sulphate bone graft mixed with A-PRF.

Results: The mean of bone gain was (7.961 ± 2.781) mm and the mean of bone reduction was (2.351± 1.832) mm, a statistical significant difference was found between the study stages of the graft, where the P value was < 0.05 between each two stages of the study, including the comparison between the preoperative stage and six months after surgery, which refers to the effectiveness of using calcium sulfate bone graft mixed with APRF in external sinus lifting in delayed implantation.

Conclusion: The application of calcium sulfate bone graft mixed with APRF is safe and easy to use in grafting procedures and doesn’t cause immune reactions, and it also provides sufficient bone gain for implantation. The bone reduction didn’t significantly affect the amount of bone gain.