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

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...

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Detalles Bibliográficos
Autores principales: You, Tae Min, Kim, Kee-Deog, Huh, Jisun, Woo, Eun-Jung, Park, Wonse
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Korean Dental Society of Anesthsiology 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5564166/
https://www.ncbi.nlm.nih.gov/pubmed/28879267
http://dx.doi.org/10.17245/jdapm.2015.15.3.113
Descripción
Sumario: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.