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Volume 32 , Issue 1
January/February 2017

Pages 147155

Association Between Peri-implant Bone Morphology and Marginal Bone Loss: A Retrospective Study on Implant-Supported Mandibular Overdentures

Qian Ding, PhD(c)/Lei Zhang, PhD/Wil Geraets, PhD/Wuqing Wu, PhD/Yongsheng Zhou, PhD/Daniel Wismeijer, PhD/Qiufei Xie, PhD

PMID: 27835706
DOI: 10.11607/jomi.4922

Purpose: The present study aimed to explore the association between marginal bone loss and type of peri-implant bony defect determined using a new peri-implant bony defect classification system. Materials and Methods: A total of 110 patients with implant-supported mandibular overdentures were involved. Clinical information was collected, including gender, age, smoking habit, and the overdenture attachment system used. Peri-implant bony defect types and marginal distances (ie, distance between the marginal bone level and the top of the implant shoulder) of all sites were identified on panoramic radiographs by a single experienced observer. The associations between marginal distance and peri-implant bony defect type, gender, age, smoking habit, attachment system, and time after implantation were investigated using marginal generalized linear models and regression analysis. Results: A total of 83 participants were included in the final sample with a total of 224 implants involving 3,124 implant sites. The mean observation time was 10.7 years. All peri-implant bony defect types except Type 5 (slit-like) were significantly related to marginal distance in all models (P < .01). Smoking and time after implantation were significantly related to marginal distance while gender, age, and the overdenture attachment system used were not. Conclusions: The periimplant bony defect type, determined using the new classification system, is associated with the extent of marginal bone loss.

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