Anesthetic effect on mandibular permanent molar by periodontal ligament injection using single tooth anesthetic delivery system
Objective To assess the anesthetic effect on mandibular permanent molar by periodontal ligament(PDL) injection using single tooth anesthetic(STA) delivery system.Methods 120 mandibular permanent molars diagnosised as deep caries,chronic pulpitis and acute pulpitis were randomly divided into two groups.Using STA system,60 teeth received PDL injection by standard technique,60 teeth received PDL injection by improved technique.After anesthetic injection,cavity filling treatment or root canal therapy was performed.Anesthetic effectiveness according to pain sense during treatment period was recorded.Results The anesthetic effect rate on mandibular permanet molars was 92.5%.In deep caries group,the anesthetic effect rate was 100.0%.In chronic pulpitis group,the anesthetic effective rate was 90%.In acute pulpitis group,the anesthetic effect rate was 85% injected by standard technique and 90% injected by improved technique respectively.There was no significant statistic difference between standard and improved technique(χ2=9.445,P=0.49).Conclusion It is a satisfied approach to use either standard or improved technique in PDL injection with STA system in mandibular permanent molar anesthesia.