Objective To investigate the effect of mucosal thickness around implants on marginal bone resorption.Methods A retrospective analysis was conducted on the clinical data of 75 patients who received single-tooth implant restorations at Shaoxing Stomatological Hospital from December 2020 to May 2022.The patients were divided into two groups based on mucosal thickness:the thin gingiva group(n=40)and the thick gingiva group(n=35).In the thin gingiva group,implants were placed 1.5 mm below the bone surface,while in the thick gingiva group,implants were placed at the bone surface.Implant survival rates,marginal bone resorption,bone remodeling,and the incidence of adverse reactions were compared between the two groups.Results The implant survival rate in the thin gingiva group was significantly lower than that in the thick gingiva group[75.00％(30/40)vs.94.29％(33/35),x2=5.17,P＜0.05].After 9 months of weight bearing,marginal bone resorption value in the thin gingiva group was significantly higher than that in the thick gingiva group[(0.16±0.04)vs.(0.14±0.02),t=2.83,P＜0.05].The bone remodeling value in the thin gingiva group was significantly lower than that in the thick gingiva group[(1.03±0.21)vs.(1.25±0.34),t=3.48,P＜0.05].The incidence of adverse reactions including infection,bleeding,occlusal weakness,and pain in the thin gingiva group was significantly higher than that in the thick gingiva group[25.00％(10/40)vs.5.72％(2/35),x2=5.17,P＜0.05].Conclusion A mucosal thickness of ≥ 3 mm is associated with a higher survival rate of implants placed below the bone surface,which better maintains bone tissue stability,reduces bone resorption,promotes bone remodeling,and decreases the incidence of adverse reactions.
Dental implants,single-toothGingivaProstheses and implantsBone resorptionRoot cause analysis
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