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KMID : 0355220070320020177
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Journal of Korean Academy Oral Medicine
2007 Volume.32 No. 2 p.177 ~ p.185
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Effect of Inferior Alveolar Nerve Block Anesthesia on Taste Threshold
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Ahn Young-Joon
Kim Seung-Whan
Kim Mee-Eun
Kim Ki-Suk
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Abstract
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Iatrogenic injury following dental treatments and the use of local anesthetics may cause taste disorders. The aims of this study were to investigate quantitative and qualitative changes of taste due to unilateral inferior alveolar nerve block anesthesia and further to evaluate potential effects on taste function related to anesthesia or hypoesthesia of inferior alveolar nerve, possibly occurring after dental procedure.
30 healthy volunteers in their twenties participated in this study (male to female = 1:1, mean age of 24.0±1.8 years). Each subject received inferior alveolar nerve block anesthesia on his or her right side with 2% lidocaine HCl containing 1:100,000 epinephrine. Before and after anesthesia, electrogustometric test and chemical localized test for salty, sweet, sour and bitter tastes were performed on the eight sites in the oral cavity; right and left anterior and lateral tongue and circumvallate papilla of the tongue and soft palate.
Unilateral inferior alveolar nerve anesthesia produced elevation of electrical taste threshold and reduction of intensity ratings for all 4 tastes (salty, sweet, sour and bitter) over anterior and lateral tongue and circumvallate papilla on the ipsilateral side (p<0.05). Contralateral sides exhibited decreased intensity ratings for salty and sweet taste (p<0.05) on anterior and lateral tongue while there was no significant difference in electrogustometric testing.
Based on the results of this study, it is assumed that unilateral local anesthesia on inferior alveolar nerve can affect chorda tympani and glossopharyngeal nerves on the same side, leading to taste deficits. Taste intensity on the contralateral side may, in part, be deteriorated as well.
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KEYWORD
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Taste, Anesthesia, Inferior alveolar nerve, Electrogustometry, Chemical localized test
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