Periodontal ligament injection primarily achieves complete anaesthesia in a tooth where regional block anaesthesia had previously failed to provide it.The PDL injection technique is employed as a supplemental injection technique for unsuccessful conventional techniques, particularly inferior alveolar nerve block for mandibular anaesthesia. The aim of this survey is to evaluate the knowledge of periodontal ligament injection technique among the dental student and to reinforce these in practice by giving additional education towards the outcome of improper treatment. The cross-sectional questionnaire survey was conducted amongst the dental students to determine their knowledge towards periodontal ligament injection. A total of 160 dental students from different dental colleges in Chennai, India were entered into the study. On analysis of the given data it was observed 87 out of 160 (54%) belong to internship categories, 34 were senior interns with 23 perusing post-graduation and the remaining 16 (10%) were private dental practitioners. The questions were individually subjected to chi square test. The chi-square statistic is 212.446. The p-value is .0001. The result is significant at p < .05 The present study concluded that majority of the dental students are aware about importance and complications of PDL injection. Even though most of the practitioners acquired more knowledge yet minor ignorance by few practitioners has been noted. Thus, the background of this survey is to evaluate the knowledge amongst practitioners and to reinforce additional education towards the outcome of improper treatment.

Keywords : PDL Injection, Anaesthesia, Supplementary Injection, Haemophilic Patients.