The influence of mandibular skeletal characteristics on inferior alveolar nerve block anesthesia.
10.17245/jdapm.2015.15.3.113
- Author:
Tae Min YOU
1
;
Kee Deog KIM
;
Jisun HUH
;
Eun Jung WOO
;
Wonse PARK
Author Information
1. Department of Advanced General Dentistry, College of Dentistry, Dankook University, Cheonan, Korea.
- Publication Type:Original Article
- Keywords:
Condyle-coronoid ratio;
Inferior alveolar nerve block;
Skeletal characteristics
- MeSH:
Anesthesia*;
Dentistry;
Mandible;
Mandibular Nerve*;
Molar, Third;
Skeleton
- From:Journal of Dental Anesthesia and Pain Medicine
2015;15(3):113-119
- CountryRepublic of Korea
- Language:English
-
Abstract:
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.
