Crestal bone resorption during the healing period of guided bone regeneration with simultaneous implant placement in anterior aesthetic area: a prospective clinical study

doi:10.19438/j.cjoms.2017.05.008

Abstract

Abstract: PURPOSE: To investigate crestal bone resorption during the healing period of guided bone regeneration (GBR) with simultaneous implant placement in anterior aesthetic area. METHODS: From September 2015 to April 2016, patients received dental implants with simultaneous GBR were included in the study. Periapical film and cone-beam CT (CBCT) were acquired once the operation was finished and 6 months after surgery. Mucosal thickness (>2 mm or ≤2 mm), types of bone quality and different membrane used were also recorded. Mesial and distal marginal bone level in periapical film on the day of operation was recorded as MB1 and DB1. Bone level was recorded as MA1 and DA1　6 months after surgery. The difference of MB1/MA1 and DB1/DA1 was recorded as MD1 and DD1. MB2, DB2, MA2, DA2, MD2 and DD2 were identified on CBCT in the same way. Buccal and lingual alveolar bone loss was recorded as BD and LD. The data were analyzed using SPSS 21.0 software package. RESULTS: A total of 30 implants with GBR were analyzed. Mean MD1 and DD1 in periapical film were (1.61±1.03) mm and (1.39±0.91) mm, respectively. Median MD2, DD2, BD and LD in CBCT were 1.34 mm (0.00-2.25 mm), 0.90 mm (0.00-2.00 mm), 0.71 mm (0.00-1.41 mm), and 0.47 mm (0.00-1.49 mm), respectively. No significant correlation was observed in MB1/MB2 and DB1/DB2 (P>0.05). However, moderate correlation was observed in MA1/MA2 and DA1/DA2 (P<0.05). Results in different mucosal thickness, types of bone quality and membrane used were P=0.86, 0.02 and 0.83 in MD1 and P=0.74, 0.40 and 0.40 in DD1. CONCLUSIONS: Certain amount of peri-implant crestal bone loss was observed during the healing period of GBR with simultaneous implant placement in anterior aesthetic area. CBCT doesn't seem to be an accurate method to evaluate marginal bone level around implants. Different types of bone quality may have some impacts on crestal bone loss.

Key words: Crestal bone resorption, Guided bone regeneration, Dental implant, Periapical film, CBCT

CLC Number:

R782.1

ZHANG Chu-nan, MO Jia-ji, QIAO Shi-chong, NI Jie, WANG Bei, GU Ying-xin.. Crestal bone resorption during the healing period of guided bone regeneration with simultaneous implant placement in anterior aesthetic area: a prospective clinical study[J]. China Journal of Oral and Maxillofacial Surgery, 2017, 15(5): 416-421.

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