TY - JOUR
T1 - Do mandibular third molars play a role in fractures of the mandibular angle and condyle?
AU - Nogami, Shinnosuke
AU - Yamauchi, Kensuke
AU - Bottini, Gian Battista
AU - Kouketsu, Atsumu
AU - Otake, Yoshio
AU - Sai, Yuko
AU - Kataoka, Yoshihiro
AU - Miyashita, Hitoshi
AU - Takahashi, Tetsu
PY - 2018/1/1
Y1 - 2018/1/1
N2 - Introduction: The relationship between impacted mandibular third molars with angle and condylar fractures is subject of many publications, yet their conclusions differ widely, hence the authors wanted to investigate this topic in their patients. Methods: The authors designed a retrospective study including 241 patients who presented with angle and/or mandibular condyle fractures over a 13-year period at the authors’ institution. The study variable was the presence/absence of third molars. The authors used the Pell and Gregory system to classify their position, whereas the angulation was classified using Archer classification. The outcome variables were the presence of angle and condylar fractures. Other study variables included fracture etiology. Results: Assaults were the most frequent cause of angle fractures (62.7%), whereas falls were mostly responsible for condylar fractures (79.6%). Angle fractures were mostly isolated (66.3%), whereas condylar fractures were mostly associated with other fractures (62.6%). The majority of the angle fractures occurred in patients with third molars (63.6%), on the contrary the majority of the condylar fractures occurred in patients without mandibular third molars (78.3%). Angle fractures were mostly associated with fully erupted or superficially impacted third molars (90,9%). Finally in the presence of mesioangulated third molars, condylar fractures did not happen in 83.8% of patients. Conclusions: According to the authors’ findings, fully erupted or superficially impacted mandibular third molars are a risk factor for angle fractures but at the same time a protective factor for the condyle. On the contrary, the absence of mandibular third molars ‘‘strengthens’’ the angle and represents a risk factor for condylar fractures.
AB - Introduction: The relationship between impacted mandibular third molars with angle and condylar fractures is subject of many publications, yet their conclusions differ widely, hence the authors wanted to investigate this topic in their patients. Methods: The authors designed a retrospective study including 241 patients who presented with angle and/or mandibular condyle fractures over a 13-year period at the authors’ institution. The study variable was the presence/absence of third molars. The authors used the Pell and Gregory system to classify their position, whereas the angulation was classified using Archer classification. The outcome variables were the presence of angle and condylar fractures. Other study variables included fracture etiology. Results: Assaults were the most frequent cause of angle fractures (62.7%), whereas falls were mostly responsible for condylar fractures (79.6%). Angle fractures were mostly isolated (66.3%), whereas condylar fractures were mostly associated with other fractures (62.6%). The majority of the angle fractures occurred in patients with third molars (63.6%), on the contrary the majority of the condylar fractures occurred in patients without mandibular third molars (78.3%). Angle fractures were mostly associated with fully erupted or superficially impacted third molars (90,9%). Finally in the presence of mesioangulated third molars, condylar fractures did not happen in 83.8% of patients. Conclusions: According to the authors’ findings, fully erupted or superficially impacted mandibular third molars are a risk factor for angle fractures but at the same time a protective factor for the condyle. On the contrary, the absence of mandibular third molars ‘‘strengthens’’ the angle and represents a risk factor for condylar fractures.
KW - Mandible angle fractures
KW - Mandibular condyle fractures
KW - Mandibular third molars
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U2 - 10.1097/SCS.0000000000004961
DO - 10.1097/SCS.0000000000004961
M3 - Article
C2 - 30192292
AN - SCOPUS:85054462491
VL - 29
SP - e713-e717
JO - Journal of Craniofacial Surgery
JF - Journal of Craniofacial Surgery
SN - 1049-2275
IS - 7
ER -