Abstract
The purpose of this case report / case series was to analyze the pattern of alveolar bone repair after extraction with the use of a collagen membrane associated or not with lyophilized bovine bone (Bio-Oss). The sample consisted of six adult patients, aged from 40 to 60 years, with indication of extraction of the upper incisors and subsequent rehabilitation with dental implants, three participants were randomly distributed in the following groups: Test - Bio-Oss associated with collagen membrane absorbable; Control - blood clot associated with an absorbable collagen membrane. Alveoli with significant bone loss, probe greater than 4 mm, uncontrolled systemic changes and smoker were excluded. The less traumatic extractions, followed by anti-inflammatory and antibiotic protocol. Computed tomography images from the preoperative time (T0) and after 4 months (T1) were used to measure bone filling. The data were compared using the T test, considering a 5% significance level. Less resorption was observed in the test group (p = 0.002). The technique of preserving the alveolar ridge with Bio-Oss and absorbable membrane was satisfactory to prevent changes in the contour of the tissue.
Highlights
Série de Casos Uso de Membranas con o sin Bio-Oss Para la Conservación del Alveolo de Extracción: Una Serie de Casos
There are several biomaterials that can be used as a graft to preserve the alveolus, such as autogenous bone, allografts, xenografts, and alloplastic materials (Wood & Mealey, 2012)
The alveolar bone volume must be preserved during extraction, to minimize resorption, improving the aesthetic profile, and to make possible to install the dental implant in the appropriate diameter, position and desired angle (Nevins, et al, 2014)
Summary
The aesthetic success of implant-supported rehabilitation can be influenced by several clinical factors, especially in anterior maxillary area, where the aesthetic result is a challenge (Kan, et al, 2011) Among these factors, the implant placement, soft tissue management, adequate prosthetic procedures and maintenance of the alveolar ridge after extraction can be highlighted (Kan, et al, 2011). Lyophilized bovine bone (Bio Oss®; Geistlich - Wolhusen, Switzerland) is widely used to keep the alveolar process due to its osteoconductive property, working as a support for bone neoformation and enabling the colonization of osteoblasts (Chackartchi, et al, 2011) It helps maintain architecture edge (Gregori, et al, 1996), and can be used at the moment of implant placement, but the absorption is slow (Gregori, et al, 1996), and its use at the time of extraction is more indicated.
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