| Objective: A retrospective study was conducted to analyze the differences in bone resorption at the neck margin of the implants under different bone density and surgical methods,with the aim of providing a new and feasible implant scheme for patients with missing teeth and missing dentition.Methods:186 implants(168 patients)implanted in our hospital from September 2019 to March2022 were selected,and all indicators met the inclusion criteria.The implantation sites were divided into three groups according to the differences in bone density: high density,medium density,and low density.Each density group was implanted using different surgical methods(digital non flap implant method is surgical method A,and conventional flap implant method is surgical method B).A total of 66 implants were used in the high-density group,of which 33 were treated with A-type surgery and 33 with B-type surgery;In the medium density group,there were60 implants,of which 30 were treated with A operation and 30 with B operation;In the low density group,there were 60 implants,of which 30 were treated with A and 30 with B.To observe the differences in marginal bone loss(MBL)of the implant neck in different bone density groups 6 and 12 months after using A and B procedures.Results: 1.In the high-density group(unloaded)6 months after surgery,the MBL of type A was0.19±0.02 mm;the MBL of type B was 0.19±0.02 mm.In the medium density group,the MBL of type A was 0.25±0.02 mm;the MBL of type B was 0.35±0.04 mm.In the low density group,the MBL of type A was 0.37±0.09 mm;the MBL of type B was 0.47±0.09 mm.In the high-density group(loaded)12 months after surgery,the MBL of type A was 0.22±0.03 mm;the MBL of type B was 0.33±0.03 mm.In the medium density group,the MBL of type A was0.28±0.08 mm;the MBL of type B was 0.40±0.08 mm.In the low density group,the MBL of type A was 0.5±0.10 mm;the MBL of type B was 0.59±0.12 mm.Conclusion: 1.At any density implant location,using A-type surgery can reduce the amount of marginal bone absorption,which is more conducive to maintaining the stability of the bone level at the margin of the implants.2.When using A or B surgical implantation,the marginal bone resorption at the high-density implant site is less,and bone density is negatively correlated with the marginal bone resorption.Therefore,the operator should pay attention to preoperative bone density measurement and evaluation,timely avoid risks,reduce the incidence of postoperative complications and related adverse events,and ensure long-term results. |
