Alex Lvovsky1, Shir Bachrach2, Hyeon-Cheol Kim3, Ajinkya Pawar4, Oleg Levinzon2, Joe Ben Itzhak5, Michael Solomonov5. 1. Department of Endodontics, Medical Corps, Israeli Defense Forces, Ramat Gan, Israel. Electronic address: lvovsky.alex@gmail.com. 2. Private Practice, Ramat Gan, Israel. 3. Department of Conservative Dentistry, School of Dentistry, Dental Research Institute, Pusan National University, Yangsan, Korea. 4. Department of Conservative Dentistry and Endodontics, Government Dental College and Hospital, Mumbai, India. 5. Department of Endodontics, Medical Corps, Israeli Defense Forces, Ramat Gan, Israel; Private Practice, Ramat Gan, Israel.
Abstract
INTRODUCTION: This study aimed to investigate the difference in the location of the inferior alveolar nerve (IAN) in relation to the apices of mandibular molars in 3 different populations using cone-beam computed tomographic (CBCT) imaging and to assess the proportion of teeth in close proximity (a distance of 1 mm or less) to the IAN. METHODS: Random CBCT images (N = 1224, Israel = 408, South Korea = 416, and India = 400) were examined. The shortest distance to the mandibular canal was measured by imaging software. RESULTS: The mean distance was 4.81 ± 2.15 mm. The mean distances for Israel, South Korea, and India were 4.60 ± 2.37 mm, 5.45 ± 2.13 mm, and 4.35 ± 1.76 mm, respectively. The distance in samples obtained from South Korea was significantly larger than the distance in samples obtained from Israel and India (P < .05). Samples from Israel exhibited close proximity in 6.6% of samples versus 3% in samples from India and 0.7% of samples from South Korea, a statistically significant difference (P < .05). CONCLUSIONS: Although variation in tooth morphology in different populations was widely researched, the variation in the location of the IAN in relation to tooth apices of different populations was not addressed in the literature. Our study reveals that a difference in the distance of the apices to the IAN exists between populations as well as a difference in the proportion of teeth in close proximity to the IAN.
INTRODUCTION: This study aimed to investigate the difference in the location of the inferior alveolar nerve (IAN) in relation to the apices of mandibular molars in 3 different populations using cone-beam computed tomographic (CBCT) imaging and to assess the proportion of teeth in close proximity (a distance of 1 mm or less) to the IAN. METHODS: Random CBCT images (N = 1224, Israel = 408, South Korea = 416, and India = 400) were examined. The shortest distance to the mandibular canal was measured by imaging software. RESULTS: The mean distance was 4.81 ± 2.15 mm. The mean distances for Israel, South Korea, and India were 4.60 ± 2.37 mm, 5.45 ± 2.13 mm, and 4.35 ± 1.76 mm, respectively. The distance in samples obtained from South Korea was significantly larger than the distance in samples obtained from Israel and India (P < .05). Samples from Israel exhibited close proximity in 6.6% of samples versus 3% in samples from India and 0.7% of samples from South Korea, a statistically significant difference (P < .05). CONCLUSIONS: Although variation in tooth morphology in different populations was widely researched, the variation in the location of the IAN in relation to tooth apices of different populations was not addressed in the literature. Our study reveals that a difference in the distance of the apices to the IAN exists between populations as well as a difference in the proportion of teeth in close proximity to the IAN.