China Journal of Oral and Maxillofacial Surgery ›› 2019, Vol. 17 ›› Issue (2): 117-122.doi: 10.19438/j.cjoms.2019.02.004

• Original Articles • Previous Articles     Next Articles

Resonance frequency analysis of implants placed with osteotome sinus floor elevation in posterior maxillae in canine

QIAO Shi-chong, MO Jia-ji, ZHANG Xiao, ZHU Yu, ZHANG Xiao-meng, SHI Jun-yu, QIAN Shu-jiao, LAI Hong-chang   

  1. Department of Implant Dentistry, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine; National Clinical Research Center for Oral Diseases; Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology. Shanghai 200011, China
  • Received:2018-12-21 Revised:2019-01-17 Online:2019-03-20 Published:2019-04-12

Abstract: PURPOSE: The aim of this study was to evaluate the validity and reliability of implant stability quotient(ISQ)used for assessing of the condition of bone-to-implant interface and to evaluate the influence of residual bone height on ISQ values in canine models. METHODS: Six Labrador dogs with bilateral sinus lift procedure and simultaneous implant placement were served as animal models. ISQ measurement was applied at 0, 4, 8, 12 weeks postoperatively. Radiographic assessment,histomorphology and clinical analysis were used to evaluate the correlation between ISQ value and bone-to-implant contact,and the validity and reliability of RFA technique in atrophic posterior maxillae. Statistical analysis was carried out using SAS 9.4 for Pearson's correlation analysis. RESULTS: All implants were successfully osseointergrated. The mean ISQ value measured immediately after implant placement was 65. At 4, 8, 12 weeks after operation,the mean ISQ value reached a higher level of 67. During the whole study period, there was no implant failure. The change of implants stability pattern was similar among different groups, no significant difference in bone-to-implant contact was observed. There was no significant correlation between ISQ value and residual bone height(RBH) value. CONCLUSIONS: Within the limitation of the study, it may be implied that ISQ values are not suitable for assessing the condition of bone-to-implant interface and the role of single RFA measurement in determining loading protocol is questionable.

Key words: Sinus floor elevation, Animal model study, Resonance frequency analysis, Dogs

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