ABSTRACT
Many patients suffer from mild, moderate or severe pain during or after root canal therapy. The purpose of this study was to evaluate the efficacy of supraperiosteal injection of dexamethasone into the periapical tissues to prevent postoperative pain associated with inflammation. In a double-blind, placebo-controlled clinical trial, 100 patients with moderate or severe pain who were referred to dental school of Tehran Islamic Azad University participated in this study. All patients had a tooth with clinical diagnosis of irreversible pulpitis. After administration of local anaesthesia, access cavity was prepared. Then, the root canals were instrumented to a minimum of a No. 25 K-file. One millilitre dexamethasone (8 mg 2 mL(-1)) or placebo was injected around the tooth. The severity of pain was assessed with regard to a modified visual analogue scale after 6, 12, 24 and 48 h. The data was analysed statistically with chi-square test. Dexamethasone was considerably effective on controlling the severity of pain during the first 24 h; in contrast, there was no difference between dexamethasone and placebo groups 48 h after the first appointment. A single dose of dexamethasone infiltrated around the apex of a tooth with irreversible pulpitis could be effective in reduction or prevention of postoperative endodontic pain during the first 24 h.
Subject(s)
Anti-Inflammatory Agents/administration & dosage , Dexamethasone/administration & dosage , Pain, Postoperative/prevention & control , Pulpitis/therapy , Root Canal Preparation , Adult , Double-Blind Method , Female , Humans , Injections , Male , Middle Aged , Pain Measurement , Pain, Postoperative/etiology , Periosteum , Root Canal Preparation/adverse effectsABSTRACT
This study is designed as an in vivo study to evaluate the impression of the preflaring method on working length determination in curved canals.
Subject(s)
Dental Pulp Cavity/pathology , Root Canal Preparation/methods , Dental Pulp Cavity/diagnostic imaging , Humans , Odontometry , Radiography , Root Canal Preparation/instrumentation , Tooth Apex/diagnostic imaging , Tooth Apex/pathology , Tooth Root/diagnostic imaging , Tooth Root/pathologyABSTRACT
INTRODUCTION: We aimed to compare apical canal transportation of extracted teeth and two types of simulated resin blocks. MATERIALS AND METHODS: Mesiobuccal root of extracted maxillary molars, high hardness simulated resin blocks (Knoop hardness=40) and low hardness simulated resin blocks (Knoop hardness=22) were prepared with K-files using step-back technique (n=15 canals in each group). Double exposure radiographic technique was used for extracted teeth. Simulated resin blocks were stabilized and scanned before and after preparation. Pre and post-preparation pictures were superimposed and apical transportation was measured. The data were analyzed statistically using ANOVA and Tukey HSD tests. RESULTS: There was no significant difference in apical canal transportation between extracted teeth and high hardness resin blocks (P>0.05). Low hardness resin blocks showed more apical transportation than the other groups (P<0.05). CONCLUSION: Under the conditions of this study, apical canal transportation for extracted teeth and high hardness simulated resin blocks were similar.
