Journal of the Korean Association of Oral and Maxillofacial Surgeons

The Korean Association of Oral and Maxillofacial Surgeons (대한구강악안면외과학회)
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Relationship between mandibular condyle and angle fractures and the presence of mandibular third molars

  • Mah, Deuk-Hyun (Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University) ;
  • Kim, Su-Gwan (Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University) ;
  • Moon, Seong-Yong (Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University) ;
  • Oh, Ji-Su (Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University) ;
  • You, Jae-Seek (Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University)
  • Received : 2014.08.07
  • Accepted : 2014.09.29
  • Published : 2015.02.28
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Abstract

Objectives: We retrospectively evaluated the impact of mandibular third molars on the occurrence of angle and condyle fractures. Materials and Methods: This was a retrospective investigation using patient records and radiographs. The sample set consisted of 440 patients with mandibular fractures. Eruption space, depth and angulation of the third molar were measured. Results: Of the 144 angle fracture patients, 130 patients had third molars and 14 patients did not. The ratio of angle fractures when a third molar was present (1.26 : 1) was greater than when no third molar was present (0.19 : 1; odds ratio, 6.58; P<0.001). Of the 141 condyle fractures patients, the third molar was present in 84 patients and absent in 57 patients. The ratio of condyle fractures when a third molar was present (0.56 : 1) was lower than when no third molar was present (1.90 : 1; odds ratio, 0.30; P<0.001). Conclusion: The increased ratio of angle fractures with third molars and the ratio of condyle fractures without a third molar were statistically significant. The occurrence of angle and condyle fractures was more affected by the continuity of the cortical bone at the angle than by the depth of a third molar. These results demonstrate that a third molar can be a determining factor in angle and condyle fractures.

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References

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