Papers by Keyword: Sinus Lift

Abstract: Sinus floor augmentation operations with calcium phosphate materials are performed when natural maxillary bone quality and quantity fail to be able to support titanium dental implants. Sinus floor augmentation can be done in one step operation when titanium implant is inserted at the same time when calcium phosphate materials. This type surgery can be done if there is enough maxillary alveolar bone height to stabilize the implant. If there is not enough bone then two step maxillary floor augmentation is performed when dental implant is placed after few months. Calcium phosphate materials are often used for maxillary sinus augmentation. These materials cause remineralization of residual maxillary alveolar bone [1]. That can be observed histologically [2,3]. However histological evaluation often means interference. Radiological investigation can be used to examine postoperatively augmented area. Nowadays cone beam computed tomography (CBCT) is the radiological method of choice for maxillofacial region due to low radiation and high quality images. There was no date found in literature on maxillary bone remineralization measured in voxel grey value density (VV) on CBCT. Rotation movement of CBCT cause beam hardening artifacts [4,5] that can alter correct measurements of bone and augmentation zone radiodensity. The aim of this study was to calculate remineralization of maxillary alveolar bone after augmentation with calcium phosphate materials radiologically and degree of artifacts created by titanium dental implant in CBCT images.

Abstract: Platelet-rich fibrin (PRF) is platelet concentration that contains growth factors and acts as a biodegradable scaffold. The aims of this study were to determinethe quantity ofentrappedgrowth factors (Platelet derived growth factor BB, PDGF-BB) in the PRF and radiographically assess the stability of the fibrin in maintaining the lifted sinus space in minipigs. From the in vitro study, PRF was found slowly releasing thegrowth factor, PDGF-BB, during the ex-vivo period of 60 minutes, and the amount (1,963.93±380.17 pg/ml) was comparable to the total amount from immediate extraction either by physical (2,492.2±199.78 pg/ml) or chemical lysis (2,227.32±566.59 pg/ml).In vivo study, PRF wasable to be retained in the sinus of minipigs with minimal collapse during the first 2 weeks after application. PRF has been proven to be a source for growth factors and is able to be retained in the body during the initial period of wound healing.

Abstract: The development of implantology requires enough bone support, sufficient bone architecture. The use of autograft remains the gold standard; however the surgeons use cortical bone coming from mandibular part or craniofacial site, involving severe anaesthetic bone loss. The strategy of bone substitutes in place of autograft can be an efficient method. Several patients having a sinus lift augmentation using MBCP, and BioOss have been performed in human, and bone biopsies were realized during the preparation of the site for dental implantation. Biopsies were analyzed in classical histology without decalcification and by 3D reconstruction using micro CT. Both techniques revealed bone ingrowth and MBCP resorption. For BioOss, no bone ingrtowth and resorption process were observed in spite of stability of the implant and clinical efficiency. These case reports confirm the performance of bone substitutes for Sinus Lift augmentation.