Title : Long-term evaluation of soft tissue stability in class 1 defects treated with GBR technique
Abstract:
Resorption of the alveolar walls, particularly the buccal walls, has been observed after tooth extraction. Since the buccal bone wall is composed of bundle bone, resorption is greater in this area. In contrast, less resorption is found in the lingual walls, which are thicker and composed of lamellar bone1.
Since the immediate implant itself does not have the ability to prevent alveolar dimensions loss, treatment modalities focusing on preserving the alveolar ridge after immediate implant placement in the extraction socket have been studied. Recently, Araújo et al ( 2005) conducted a study using Bio-Oss collagen with immediate implants in the gap (Class 1 defects, characterized by a gap between the implant surface and intact bone walls) in dogs. It was demonstrated that the placement of Bio-Oss® Collagen modified the process of hard tissue healing, provided additional amounts of hard tissue at the entrance of the previous socket and improved the level of marginal bone-to-implant contact. Maintaining a well-preserved buccal bony wall can result in proper soft tissue contours around implants and consequently enhance the esthetic outcome of dental implant restoration.
However, specific studies for class 1 defects (with xenografts in the GAP) assessing the long-term soft tissue dimensional stability following immediate implant placement are scarce. In this presentation we will present long-term results in the gingival tissues of the sites that received immediate implants and bone in the gap in the anterior region of the maxilla. The results of the stability of the bone tissue in these sites have already been demonstrated at the 2024 meeting in Singapore and in this next meeting we will demonstrate the impact of maintaining the buccal bone wall on the stability of the gingival margins in this same cases. We will present several clinical cases with follow-up of more than 10 years.
