Bone remodeling around implants placed after socket preservation: a 10-year retrospective radiological study

Crespi Roberto,Covani Ugo,Crespi Giovanni,Toti Paolo,Menchini-Fabris Giovanni-Battista,Brevi Bruno

doi:10.1186/s40729-021-00354-7

Abstract

BackgroundTo evaluate and compare the long-term clinical and radiological outcomes of post-extraction sockets after ridge preservation either with porcine xenograft or collagen alone. Patients underwent single-tooth extraction in the posterior mandible. Fresh extraction sockets were filled with pre-hydrated cortico-cancellous porcine bone or collagen sponge. Two or 3 months later, a ridge expansion technique with immediate implant positioning placement was performed. Primary (alveolar width changes) and secondary outcomes (adverse events and long-term maintenance of buccal plate covering the implant) were evaluated.ResultsThirty-four women and 20 men were selected: 30 implants (group A) placed into healed post-extraction sockets grafted with porcine bone and 24 (group B) into sockets filled with a collagen sponge. There was a significant loss in width in both groups from the first and second surgery (ranging between 2.7 mm and 4.5 mm). The ridge splitting with bone expansion resulted in significant long-term increases in width for both procedures and implant sites. Non-significant differences in alveolar width were registered between the groups at 10-year follow-up even if the analysis of the implant buccal bone coverage suggested that group A had significantly worst results.ConclusionsPorcine bone group had significantly better short-term outcomes with lower long-term maintenance of the buccal plate.

Highlights

To evaluate and compare the long-term clinical and radiological outcomes of post-extraction sockets after ridge preservation either with porcine xenograft or collagen alone
Considerable difficulties in positioning dental implants in fresh extraction sockets could be associated with gradual loss of height of the alveolar walls or damage of the buccal bone plate, especially in the anterior maxilla region where the maintenance of sufficient bone volume allowed for achieving the best results in
Patients matching the following criteria were included in the further data analysis: patients who signed an informed consent form (18 years old or older); single tooth extraction in the posterior area; alveolar ridge/socket preservation (ARP) in posterior extraction sites with either a cortico-cancellous porcine bone or a collagen sponge; delayed alveolar ridge-splitting/expansion (ARS) technique with

Summary

Introduction

To evaluate and compare the long-term clinical and radiological outcomes of post-extraction sockets after ridge preservation either with porcine xenograft or collagen alone. Considerable difficulties in positioning dental implants in fresh extraction sockets could be associated with gradual loss of height of the alveolar walls or damage of the buccal bone plate, especially in the anterior maxilla region where the maintenance of sufficient bone volume allowed for achieving the best results in Due to their excellent biocompatibility and bioactivity, anorganic animal bone particles were used as graft materials for both the ridge preservation and the maxillary sinus augmentation, so providing sufficient gain to Roberto et al International Journal of Implant Dentistry (2021) 7:74 achieve adequate bone volume and quality [10,11,12,13]. It was assessed the advance in increasing the bone mineral content of the buccal bone defects after filling with collagen alone [16]

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