Risk factors for labial bone resorption and marginal bone resorption after implantation accompanied by guided bone regeneration
Objective:To analyze the factors influencing labial bone resorption six months after delayed implant placement with simultaneous guided bone regeneration(GBR)in the anterior maxillary region.To explore the impact of the labial bone width at the time of second-stage surgery on marginal bone loss,1 year after final restoration.Methods:The retrospective cohort study included 57 patients with 94 implants and with a follow-up of 1 year after final restoration.Cone beam CT(CBCT)was used to measure the labial horizontal bone width and vertical bone height of implants immediately after surgery(T1)and six months later(T2).Generalized linear mixed models were employed to analyze the factors affecting horizontal and vertical bone resorption.Implants were categorized into three groups based on labial bone width measured by CBCT six months postoperatively:0 mm bone wall group,<2 mm bone wall group,and≥2 mm bone wall group respectively.The impact of labial bone width on marginal bone resorption was explored through one-year follow-up after prosthetic loading.Results:Non-contained defects and implant connection with healing abutments were correlated with less horizontal and vertical bone resorption.Results from the one-year follow-up revealed that there was no significant difference among the three groups.Soft tissue augmentation at implant sites were significantly associated with less marginal bone loss.Conclusion:Six months after GBR,the use of healing abutments and contained defects intraoperatively favored the preservation of horizontal and vertical bone volume.Soft tissue augmentation at implant sites contributed to maintaining stable marginal bone level.
guided bone regenerationbone resorptiondefect morphologyimplant connectionsoft tissue augmentation
国家科技期刊平台
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