Osteotome Sinus Floor Elevation With CGF Simultaneous Implantation:A Clinical Study Of 1-5 Years

Objective:In this study,we observed the implant clinical indexes of osteotome sinus floor elevation with concentrate growth factors(CGF)simultaneous implantation in residual bone high(RBH)<4mm and RBH4-7mm..To evaluate the shortterm and medium-term efficacy of this technique,and to provide the basis for clinical practice.Methods: A total of 61 patients in the department of stomatology from Zhangzhou Affiliated Hospital of Fujian Medical University were selected for osteotome sinus floor elevation with CGF and 76 implants were implanted at the same time from January2014 to December 2018.If the sinus membrane was perforated,CGF was placed into the sinus cavity alone.If the sinus membrane was judged to be intact,the bone graft was filled.According to RBH,the patients were divided into RBH < 4mm group(22 patients;27 implants)and RBH 4-7mm group(37 patients;49 implants).CBCT imaging and specialty examination data were collected during 1-5 years follow-up(mean 2.82±1.61 years)for clinical evaluation.Specific evaluation indicators were as follows: implant cumulative survival rate,postoperative pain,common complications,implant protrusion length,endo-sinus bone gain,vertical bone resorption and marginal bone loss,etc.Results: The cumulative survival rate of implants was 96.30% in the RBH<4mm group and 95.92% in the RBH4-7mm group.The sinus membrane perforation rates were 13.64% and 7.69% in two groups,respectively.All the perforated sinus membrane were transplanted with CGF alone and all the implants were successful during the follow-up period.In the RBH<4mm group,the preoperative RBH was 3.37± 0.44 mm,the implant protrusion length was 5.62±0.75 mm.In the RBH4-7mm group,the preoperative RBHwas5.55±0.87 mm,the implant protrusion length was4.44±1.17 mm.The endo-sinus bone gain in the RBH<4mm group was 7.81±1.14 mm immediately after surgery,and 6.45±1.15 mm in the 5th year.The endo-sinus bone gain in the RBH4-7mm group was 7.79±1.07 mm immediately after surgery,and 5.65±0.63 mm in the 5th year.In the RBH<4mm group,the marginal bone loss was 0.82±0.19 mm 1 year after the surgery,and 1.26±0.14 mm 5 years after the surgery.In the RBH4-7mm group,the marginal bone loss was 0.84±0.15 mm 1 year after the surgery,and 1.26±0.15 mm 5years after the surgery.There was no significant difference between the two groups in the marginal bone loss,vertical bone resorption and postoperative pain.Conclusion: Under the condition of reasonable indications,the simultaneous implant technique of osteotome sinus floor elevation with CGFin the patients with RBH deficiency in the maxillary posterior region can obtain a good short-term and mediumtermclinical effect,which is worthy of clinical application.