Comparison of buccal bone plate resorption between different extraction socket preservation techniques- use of allograft, xenograft and PRGF

Abstract

Background : The successful osteointegration and longevity of implants depends on the quality and quantity of residual bone at the time of implant placement. The resorption of alveolar bone rapidly begins after tooth ex traction during the firs t year and continues for years. Different studies revealed that alveolar bone loss during 12 mo nths af ter ex traction is 11–22% of alveolar bone height and 29–63% of width, while two- thirds of bone is lost during first 3 months after tooth extraction. Aim/Hypothesis : To evaluate buccal bone plate resorption rate after extraction socket preservation using different bone graft materials- allograft, xenograft and PRGF. Histological analysis of bone graft newly formed bone connective tissue ratio. Material and Methods : • Selection of patients with sufficient extraction sockets for socket preservation. • Following local anesthesia, the teeth should be gently extracted. • Preparation of PRGF. • Six different extraction socket preservation techniques will be divided into six groups-Group I – tooth extraction socket filled with blood clot, Group II – tooth extraction socket filled with Cerabone® and resorbable natural soft tissue membrane Jason®, Group III – tooth ex- traction socket filled with Maxgraft® and resorbable natural soft tissue membrane Jason®, Group IV – tooth extraction socket filled with Cerabone® and Plasma Rich in Growth Factors (PRGF®) Group V – tooth extraction socket filled with Maxgraft® and PRGF®, Group VI – tooth extraction socket filled with PRGF®. • After extraction and after 12 weeks CBCT analysis is done. • Histomorphometric analysis of regenerated bone considering bone graft newly formed bone connective tissue ratio. Results : (i) Extraction sockets filled with xenograft and Plasma Rich in Growth Factors (PRGF®) seemed the most effective considering al- veolar ridge resorption. (ii) Sockets filled with PRGF [...].