Does crown/implant ratio influence the survival and marginal bone level of short single implants in the mandibular molar? A preliminary investigation consisting of 12 patients

作者：Ghariani L; Segaan L; Rayyan M M; Galli S; Jimbo R; Ibrahim A

来源：Journal of Oral Rehabilitation, 2016, 43(2): 127-135.

DOI：10.1111/joor.12342

• dental implants
• single tooth
• mandible
• prostheses and implants
• bone resorption
• treatment outcome

Crown/implant (C/I) ratio has been proven to not affect the survival of the implants; however, it is also a fact that no evidence exists with regard to the use of single short implants in the mandibular molar. The aim of this study was to determine whether the crown/implant ratios of single implant-supported fixed restorations on implants of 6-8mm in the mandibular molar have an impact on the implant survival and marginal bone maintenance. Twelve short dental implants (6-8mm) were installed and restored with single crowns, loaded after 3months of healing. The restorations were divided according to crown-to-implant ratio into two groups: Group 1: C/I<20 and Group 2: C/I20. Alveolar bone loss was measured using CBCT scan, taken at the implant placement and after 12months follow-up from loading. Reduced implant/crown ratio shown no statistic significant differences on implant survival and the alveolar bone level compared with recommended implant/crown ratio. Within the limitation of this study, it can be concluded that reduced C/I ratio could be used as a substitute for recommended C/I ratio in severely mandibular atrophic residual alveolar ridges.

• 出版日期2016-2