BLOCK GRAFTING APPROACH: A CASE REPORT K.AMINE, M. EL FAROUKI, G. HASSAR, J. KISSA Department of periodontology - Dental school - Casablanca - Morocco Soft and hard tissue defects create an anatomically less favorable foundation for ideal implant placement. Reconstruction of the alveolar bone through a variety of regenerative surgical procedures has become predictable. It may be necessary prior to implant placement or simultaneously at the time of implant surgery, to provide a restoration with a good long term prognosis. Introduction Hamza . Z, male, 21 ans years old, good general health, Tobacoo ---- Diagnosis : localized bone résorption CL IV at the upper righit lateral incisor’s place (Cawood & Howell 1988) Case report Clinicals aspects: pretreatment intraoral views Pre operative tomography scan Extraction of the lateral incisor leads to severe horizontal ridge defect Horizontal bone resorption BONE GRAFT SURGERY Donnor and Recipient site 6 Months healing Vestibular incision The mental nerves are identified and protected Haverst of block graft from the symphysis Sutures of the donnor site: Deep plan sutures and superficial plan sutures Radiological and Clinical aspect of the bone augmentation at the time of the implant surgery Bone fixation, Particulate autogenous bone has been placed Post operative view of bone graft site with good ridge contour Pre operative view of the site with ridge defect Hermetics sutures of the recipient site CLIV resoption Catwood and Howell Discussion A variety of onlay bone graft techniques has been used for severely resorbed ridges. The success of the reconstructive procedures is influenced by the span of the edentulous ridge and the amount of attachment on the neighboring teeth. Although, autologous onlay bone graft techniques have been considered as gold standard, for horizontal augmentation (Matsumoto et coll 2002). Donor sites ,morbidity ,associated with block grafts has turned attention to the use of allogenic graft materials. Many different techniques exist for effective bone augmentation. Further comparatives studies are warranted to evaluate the best approaches.   Brugnami F, Caiazzo A, Leone C. Local intraoral autologous bone harvesting for dental implant treatment : alternative sources and criteria of choice. Keio J Med 58(1) :24-28, March 2009 Cawood J. I, Howell R. A. " Reconstructive preprosthetic surgery. I. Anatomical considerations. Int. J. Oral Maxillofac. Surg. 1991; 20." 75-82. Matsumoto MA, Filho HN,Francischone E, Consolaro A. Microscopic analysis of reconstructed maxillary alveolar ridges using autogenous bone grafts from the chin and illiac crest. Int. J. Oral Maxillofac. implant. 2002; 17 :507-516 Mcallister B and Haghighat K. Bone augmentation techniques. J Periodontol 2007 ; 78 :377-396. Miron RJ, Hedbom E, Saulacic,N, Zhang Y, Sculean A, Bosshardt D.D and Buser D. osteogenic potential of autogenous bone grafts haversted with four different surgical techniques J DENT RES 2011 90:1428 References