Histological and tomographic evaluation of xenogeneous block grafting for maxillary sinus filling

Vol. 10 – Number 40 – 2019 IMPLANT DENTISTRY NOTEBOOK Original article / Original article Page 61-66 Histological and tomographic evaluation of xenogeneous block grafting for maxillary sinus filling Luis Eduardo Marques Padovan1 Marcelo Pedroso Pinto Ferraz2 Guilherme Oliveira3 Marcela Claudino4 Silvia Helena Marques Padovan Alves Meira5 Vanessa Helena Jamcoski2 Summary The aim of this study was to evaluate the behavior of deproteinized bovine bone grafts in maxillary sinus floor elevation surgeries by means of tomographic and histological examination. The sample consisted of 7 female patients who required the installation of osseointegrated implants for rehabilitation of the posterior edentulous or partial posterior edge of the maxilla and presented pneumatization of the maxillary sinus requiring vertical augmentation using grafting techniques. The patients underwent maxillary sinus floor elevation surgery, and the sinus cavity was filled with deproteinized bovine graft in the form of a block that was kept fixed inside the maxillary sinus by means of a graft fixation screw. Six months after the surgical procedure, a tomographic evaluation was performed to verify the increased availability of bone tissue and the histometric analysis of biopsies to evaluate the composition of the repaired tissue. The height of the alveolar ridge was increased. Before the surgical procedure it was 4.10 ± 2.03 mm and at the time of implant installation it was 19.04 ± 2.45 mm. In terms of the composition of the grafted tissue, the presence of 15.66% of bone tissue, 28.83% of biomaterial and 55.49% of soft tissue was observed. Thus, it was concluded that the use of deproteinized bovine bone blocks in maxillary sinus elevation surgeries was efficient in increasing bone availability, which allowed the installation of implants. Keywords: Bone transplantation, dental implants, maxillary sinus, bone substitutes. 1 Implant Dentistry Professor – ILAPEO. 2 Me. in Implant Dentistry – ILAPEO. 3 Me. and Dr. in Periodontics – FOAR – Unesp, Adj. Prof. of the disciplines of Periodontics/Implantology – FOUFU. 4 Prof. of Periodontics – UEPG. 5 Professor of the disciplines of Integrated Prosthesis/Clinic – UNIMAR/SP.