Impact of Crown-Implant Ratio of Single Restorations Supported by 6-mm Implants: A Short-Term Case Series Study

Gulje, F. L., Raghoebar, G. M., Erkens, W. A. L. & Meijer, H. J. A., Jun-2016, In : International Journal of Oral & Maxillofacial Implants. 31, 3, p. 672-675 4 p.

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  • Impact of Crown-Implant Ratio of Single Restorations Supported by 6-mm Implants

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PURPOSE: High crown-implant ratios might affect the biologic and technical performance of a reconstruction. The aim of this study was to assess whether a higher crown-implant ratio of single restorations on 6-mm implants resulted in more peri-implant bone loss and more prosthetic complications during a 1-year followup period.

MATERIALS AND METHODS: A group of 37 patients were provided with 47 single-implant-supported restorations on 6-mm implants. Implants were placed in the posterior mandible or maxilla, where limited bone height was available. The clinical crown-implant ratio was determined on digitized casts. Peri-implant bone changes were analyzed on intraoral radiographs. Prosthetic complications were scored throughout the evaluation period.

RESULTS: The mean crown-implant ratio was 2.14 ± 0.42. The mean peri-implant bone loss was 0.13 ± 0.36 mm. No complications occurred.

CONCLUSION: High crown-implant ratios are not accompanied by increased peri-implant bone changes or prosthetic complications during a 1-year follow-up period.

Original languageEnglish
Pages (from-to)672-675
Number of pages4
JournalInternational Journal of Oral & Maxillofacial Implants
Issue number3
Publication statusPublished - Jun-2016


  • alveolar bone loss, crown-implant ratio, dental implants, fixed dental prosthesis, prospective study, single-tooth, RANDOMIZED CONTROLLED-TRIAL, POSTERIOR REGION, DENTAL IMPLANTS, CLINICAL-TRIAL, BONE LEVELS, METAANALYSIS, MAXILLA, RATES, COMPLICATIONS, SURVIVAL

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