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.
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 6-8 mm in the mandibular molar have an impact on the implant survival and marginal bone maintenance. Twelve short dental implants (6-8 mm) were installed and restored with single crowns, loaded after 3 months of healing. The restorations were divided according to crown-to-implant ratio into two groups: Group 1: C/I < 2.0 and Group 2: C/I ≧ 2.0. Alveolar bone loss was measured using CBCT scan, taken at the implant placement and after 12 months 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.
Department of Oral Surgical Sciences, Faculty of Dentistry, Beirut Arab University, Beirut, Lebanon.
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L
Ghariani
Department of Oral Rehabilitation Sciences, Faculty of Dentistry, Beirut Arab University, Beirut, Lebanon.
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L
Segaan
Department of Oral Surgical Sciences, Faculty of Dentistry, Beirut Arab University, Beirut, Lebanon.|Department of Fixed Prosthodontics, Faculty of dentistry, Misr University for Science and Technology, Giza Governorate, Giza, Egypt.
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MM
Rayyan
Department of Prosthodontics, Faculty of Odontology, Malmö University, Malmö, Sweden.
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S
Galli
Department of Prosthodontics, Faculty of Odontology, Malmö University, Malmö, Sweden.
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http://orcid.org/0000-0003-1945-1074
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Jimbo
Public Health Service (Folktandvården), Gefle, Sweden.
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A
Ibrahim
D016301:Alveolar Bone Loss / Q000473:pathology*; D003442:Crowns; D003758:Dental Implantation, Endosseous; D019250:Dental Implants, Single-Tooth; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D019232:Dental Restoration Failure; D006801:Humans; D007576:Jaw, Edentulous, Partially / Q000534:rehabilitation*; D008334:Mandible; D008963:Molar; D016896:Treatment Outcome
bone resorption; dental implants; mandible; prostheses and implants; single tooth; treatment outcome