Abstract
The purpose of this study was to evaluate, with an electric pulp tester, the anesthetic efficacy of the periodontal ligament injection in human maxillary and mandibular teeth. The success rate of profound pulpal anesthesia was highest in the molar (75 to 79%) and premolar (58 to 63%) teeth, and lowest in the mandibular lateral incisors (18%). The duration of anesthesia was approximately 4 to 10 min. Distal teeth were anesthetized more successfully than mesial teeth. Initial needle penetration on the mesial was mildy to moderately discomforting; distal needle insertion and injection of solution were only mildy discomforting (the maxillary lateral incisors had significantly higher discomfort ratings). No increase in mobility was observed 45 min following the injections. Postinjection discomfort was experienced by 86% of the subjects and 36% reported that their teeth felt high in occlusion. No clinically observable pulpal or periodontal damage was seen 4 wk postinjection, except in one maxillary molar.
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