Efficacy of incisive nerve block for pulp anaesthesia in the mandible

INTERVENTION: This is a randomised, double‐blind, cross‐over study. Each volunteer will receive 2 incisive nerve block injections in the mouth, one with and one without massage of the injection site, in random order over 2 visits (one injection per visit). All injections will be given by an experienced dentist. The digital massage of the injection site will be done after the injection for 60 seconds. Incisive nerve block injection: 2% lidocaine + 1:80,000 epinephrine CONDITION: Anaesthesia in the mandible ; Oral Health ; N/A PRIMARY OUTCOME: Numbness of lower teeth (back teeth) following local anaesthetic injection. This will be assessed by electric pulp testing every 2 minutes after injection for the first 10 minutes then every 5 minutes until 45 minutes. SECONDARY OUTCOME: 1. Injection discomfort, assessed with a visual analogue scale at each visit; 2. Duration of numbness after injection INCLUSION CRITERIA: 1. Healthy adult volunteers 2. Staff or students at the Newcastle University