Abstract
Summary. Periodontal ligament anaesthesia is in wide clinical use in dentistry today. A variety of specialized high pressure syringes have been developed to administer periodontal ligament anaesthesia more efficiently. A clinical study was carried out using the lower first molar teeth on both sides of the mouth of the same patient, providing a test and control tooth, for administration of periodontal ligament anaesthesia. Periodontal ligament injection (PDL‐I) was administered to the test tooth, and conventional inferior alveolar block anaesthesia to the control tooth. The oral hygiene index, gingival index, tooth mobility, tooth vitality and probing depths were measured prior to injection 48 hours postoperatively, and 4 weeks postoperatively. Subjective and objective clinical impressions of depth of anaesthesia, postoperative pain and nature of any postoperative pain were noted at the same time intervals. Observation and measurements were subjected to statistical analysis. The PDL‐I produced no observed or measured changes in either the tooth or the periodontium within the scale of time which was chosen. Acceptance of the technique by patients was mainly favourable, although a few subjects experienced severe postoperative pain.
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