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The influence of mandibular skeletal characteristics on inferior alveolar nerve block anesthesia

 Tae Min You  ;  Kee-Deog Kim  ;  Jisun Huh  ;  Eun-Jung Woo  ;  Wonse Park 
 Journal of Dental Anesthesia and Pain Medicine, Vol.15(3) : 113-119, 2015 
Journal Title
 Journal of Dental Anesthesia and Pain Medicine 
Issue Date
Background: The inferior alveolar nerve block (IANB) is the most common anesthetic techniques in dentistry; however, its success rate is low. The purpose of this study was to determine the correlation between IANB failure and mandibular skeletal characteristics Methods: In total, 693 cases of lower third molar extraction (n = 575 patients) were examined in this study. The ratio of the condylar and coronoid distances from the mandibular foramen (condyle-coronoid ratio [CC ratio]) was calculated, and the mandibular skeleton was then classified as normal, retrognathic, or prognathic. The correlation between IANB failure and sex, treatment side, and the CC ratio was assessed. Results: The IANB failure rates for normal, retrognathic, and prognathic mandibles were 7.3%, 14.5%, and 9.5%, respectively, and the failure rate was highest among those with a CC ratio < 0.8 (severe retrognathic mandible). The failure rate was significantly higher in the retrognathic group than in normal group (P = 0.019), and there was no statistically significant difference between the other two groups. Conclusions: IANB failure could be attributable, in part, to the skeletal characteristics of the mandible. In addition, the failure rate was found to be significantly higher in the retrognathic group.
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1. Journal Papers (연구논문) > 2. College of Dentistry (치과대학) > Dept. of Advanced General Dentistry (통합치의학과)
Yonsei Authors
김기덕(Kim, Kee Deog) ORCID logo https://orcid.org/0000-0003-3055-5130
박원서(Park, Wonse)
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