Does Low Gonial Angle Affect the Amount of Bone Loss Around Implant inThe Posterior Mandible?

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Selcuk Dental Journal, vol.8, no.3, pp.644-647, 2021 (Peer-Reviewed Journal) identifier

  • Publication Type: Article / Article
  • Volume: 8 Issue: 3
  • Publication Date: 2021
  • Doi Number: 10.15311/selcukdentj.743119
  • Journal Name: Selcuk Dental Journal
  • Journal Indexes: TR DİZİN (ULAKBİM)
  • Page Numbers: pp.644-647
  • Istanbul Medipol University Affiliated: Yes


Background: The purpose of this study was to investigatewhether there is a role of the low gonial angle on marginal boneresorption around the implants placed in the posterior mandible. Methods: This retrospective study, including 20 patients with 46implants followed 36 months were inserted in the mandibularedentulous posterior area. Patients without systemic diseasewere included in this study. The gonial angle was measured on apanoramic x-ray; Patients with a gonial angle of more than1250were classified as high gonial angle, and those with lessthan 1200 were classified as a low gonial angle group. Mesialand distal marginal bone resorption and implant angulation withthe occlusal plane were measured via Image J software (National Institutes of Health; version 1.5i, USA). Independent samples t test was used to compare measured variables between high andlow gonial angle groups. Results: The mean marginal bone resorption (MBL) was0.27±0.16 mm for the mesial side and 0.27±0.13mm for thedistal side in the LGA group. In the HGA group, MBL was0.77±0.28mm for the mesial side and 0.71±0.27mm for thedistal side. There was no statistical significance between HGAand LGA groups regarding marginal bone resorption. However,implant angulation with the occlusal plane was correlated withmarginal bone resorption in the HGA group. Conclusion: The result of this study is that a low gonial angle isnot directly a risk factor for marginal bone resorption around thedental implant. However, implants should be placedperpendicular to the occlusal plane as possible in the HGAgroup.