Effect Of The Combined Application Of DBBM In Socket Shield Technique In Maxillary Anterior Region

Objective:The purpose of this retrospective study was to evaluate the clinical effect of using deproteinized bovine bone in socket shield technique on buccal alveolar bone preservation through short-term clinical data,and then to investigate the necessity of bone grafting in socket shield technique,with the aim of providing a clinical reference for future studies of socket shield technique.Materials and Methods:(1)Cases of premanillary teeth treated by socket shield technique combined with immediate implant treatment due to fracture or other reasons that could not be preserved within Xiangya Stomatological Hospital of Central South University between 09,2018 and 05,2021 were collected.A total of 20 implants met the inclusion criteria,and 10 implants in the study group had deproteinized bovine bone filling in the jump gap,while the 10 implants without placement were the control group.(2)The roots are separated proximally and distally with a drilling needle,the lingual root was extracted,and the implant was placed lingually in the usual immediate implant placement manner.Deproteinized bovine bone were filled when the jump gap exceeded 1 mm.If the jump gap is less than 1 mm,the implant is not filled with deproteinized bovine bone.CBCT was taken in the immediate postoperative period and in the second stage of restoration.(3)Implant success rate was evaluated clinically,and CBCT images were used to analyze the changes in buccal alveolar bone thickness and buccal alveolar bone height between postoperative and second stage of restoration using image software.The difference of data between the two groups was statistically analyzed using statistical software.The confidence level of the statistic was set at 99%,and the difference was statistically significant at P<0.01.Results:(1)The implant survival rate was 100%in both groups.(2)The mean buccal alveolar bone thickness change was 0.11 mm in the study group and 0.38 mm in the control group,and the difference was statistically significant(P<0.01).(3)The mean buccal alveolar bone height change was 0.00 mm in the study group and 0.25 mm in the control group,and the difference was not statistically significant(P>0.01).Conclusion:(1)The placement of deproteinized bovine bone does not affect the success rate of implantation in the short-term clinical practice of socket shield technique.(2)The application of deproteinized bovine bone in socket shield technique can significantly reduce the buccolingual loss of buccal alveolar bone.(3)Deproteinized bovine bone should be filled in the jump gap during socket shield technique.