Short-term therapeutic evaluation on bone augmentation technology without applying membrane in slight posterior buccal bone substitute implantation
2019, 17 (3):
PURPOSE: To investigate the clinical effects of the technology without covering collagen membrane after bone grafting on posterior-region implant with small buccal bone substitute. METHODS: Patients who were subjected to posterior region implant surgery at Department of Implant, Affiliated Hospital of Qingdao University from February, 2017 to July, 2018 were selected. The implants were not exposed, and the distances from the buccal sides to the adjacent alveolar ridge were more than 1 mm. The patients were randomly divided into bone-grafting without membrane group (alloplastic bone substitute group, 30 cases) and bone-grafting with membrane covering group (GBR group, 30 cases). The horizontal bone mass variations of buccal alveolar ridge were obtained by comparing values in immediate post-surgery and 6 months after surgery through cone-beam CT (CBCT), from 0, 3 and 6 mm apical to implant platforms respectively, where were set as T1, T2 and T3, respectively. The evaluations on horizontal bone mass variations of alveolar ridge, peri-implant soft tissues and satisfaction degrees of the patients in two groups were compared and analyzed using SPSS 22.0 software package. RESULTS: According to the horizontal bone mass variations of alveolar ridge, the T1, T2 and T3 values of the alloplastic bone substitute group were (-0.48±0.73) mm, (-0.64±0.95) mm and (-0.30±0.84) mm, respectively; while the T1, T2 and T3 values of the GBR group were (-0.35±0.66) mm, (-0.49±0.74) mm and (-0.30±0.84) mm, respectively. The horizontal bone mass variations of alveolar ridge of two groups had no significant difference (P>0.05). Through reexamination 6 months after surgery, it was shown that all the peri-implant soft tissues in two groups were healthy. In addition, all the patients had high satisfaction degrees. CONCLUSIONS: For posterior implant with small buccal bone defects, the clinical effect is the same to GBR surgery simply through bone grafting, and healthy and stable soft tissues and high satisfaction degree can be obtained.
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