Risk Assessment of Jawbone Fracture by Mandibular Cortical Bone Width Using Computed Tomography

抄録

Maxillofacial trauma is a serious health problem because of the significant negative impact on an individual of the physical and psychological health. There are few studies reported that risk assessment of jawbone fracture by mandibular cortical bone width. The purpose of this study was to evaluate the mandibular cortical bone width using CT and to assess of the risk of jawbone fracture. This study included 381 patients (181 women and 200 men; 20-95 years of age, mean age 50.5 years) with suspected jawbone fractures due to falling who underwent CT at our hospital from April 2008 to March 2015. Mandibular cortical bone width was measured from distal to the mental foramen on both sides of the mandible using CT coronal images. All images were independently evaluated by two of oral radiologists. Each of the two groups were then compared about average of mandibular cortical bone width. Of the 381 patients, jawbone fractures were seen in 243 patients (63.8 %). The average mandibular cortical bone width in patients with jawbone fractures was 2.40±0.64 mm. In contrast, the average mandibular cortical bone width in patients without jawbone fracture was 2.76±0.61 mm (p < 0.01). The interobserver agreement for MCW was good (ICC=.795). The present study found that the MCW with fracture group was significant thinner than without fracture group. Our results suggested that the MCW on CT provide a risk assessment of jawbone fractures.