Effect of the temperature of lidocaine 2% with epinephrine 1:80,000 on pain from injection and onset of action in blocking the inferior alveolar nerve

Juan Eche Herrera; César Franco Quino; Víctor Chumpitaz Cerrate; Yuri Castro Rodríguez

2015, Number 5

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Rev ADM 2015; 72 (5)

Effect of the temperature of lidocaine 2% with epinephrine 1:80,000 on pain from injection and onset of action in blocking the inferior alveolar nerve

Eche HJ, Franco QC, Chumpitaz CV, Castro RY

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Language: Spanish
References: 18
Page: 236-242
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ABSTRACT

The placement of local anesthesia causes pain in patients due to the fact that before the anesthetic takes effect, it first enters the mucosa at a temperature that is below body temperature, which results in a pain stimulus. The aim of this study was to determine the extent to which the temperature of lidocaine 2% with epinephrine 1:80,000 affects the pain caused by an injection and the onset of action. Material and methods: We performed a blind study involving 38 patients who received two applications of lidocaine 2% with epinephrine 1:80,000, one at 37 °C and the other at room temperature. Results: Based on the visual analog scale, administering anesthesia at 37 °C produced values of 6.63 ± 5.037 mm, and at room temperature, values of 12.870 ± 12.001 mm (p ‹ 0.05). On the verbal response scale, administering anesthesia at 37 °C resulted in 100% expressing «less than expected» pain, while the administration at room temperature resulted in only 61% expressing «less than expected» pain (p ‹ 0.05). In terms of time to onset of action, it was found that administering anesthesia at 37 °C produced a value of 201.66 ± 85.336 seconds, whereas at room temperature, the value was 286.66 ± 84.292 seconds (p ‹ 0.05). Conclusion: Administering the local anesthetic at 37 °C produces a lower pain intensity and shorter onset of action compared to doing so at room temperature.

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