Managing Endodontic Failure in Practice (Quintessentials of Dental Practice, Volume 23; Endodontics, Volume 2)
Bun San Chong
Format: PDF / Kindle (mobi) / ePub
This book provides practitioners with a concise, practical overview of biological principles and techniques for handling endodontic failures.
classification and clinical indications. Int Endod J 1999;32:257–282. Hülsmann M, Heckendorff M, Lennon A. Chelating agents in root canal treatment: mode of action and indications for their use. Int Endod J 2003;36:810–830. Pinheiro ET, Gomes BPFA, Ferraz CCR, et al. Microorganisms from canals of root-filled teeth with periapical lesions. Int Endod J 2003;36:1–11. Siqueira Jr JF, Lopes HP. Mechanisms of antimicrobial activity of calcium hydroxide: a critical review. Int Endod J 1999;32:361–369.
screwdriver used to unscrew the post. Fig 5-22 If the head of a screw post is damaged (a) cotton wool may be placed into the hollow hand 146 wrench to prevent slippage so that (b) the screw post can then be removed. Fig 5-23 Removal of a screw post with a damaged head. (a) Pre-op radiograph. (b) Top of screw post uncovered. (c) Screw post removed using a pair of fine-beaked forceps. Care should always be exercised when attempting screw post removal, non-turning screws should not be forced.
non-surgical retreatment. Outcome At the end of this chapter, the practitioner should be conversant with techniques available for safe removal of different root filling materials such as silver points, gutta percha and paste/cement. Introduction A key difference between root canal retreatment and initial root canal treatment is the need to remove existing root canal fillings during canal negotiation. Only when radicular access is achieved, and the root canals have become negotiable, can the
our judgements and decision-making • operator bias; if the assessor was responsible for the treatment, it may be difficult to be objective and decisions are likely to be especially loaded. Equally those seeking to intervene may be too condemning in their desire to get on and treat. Studies have shown that there is relatively poor agreement amongst operators when interpreting radiographs. Although problems with radiological evaluation of treatment outcome cannot be completely eliminated, they can
may prove useful. If a crack is present, the light transmission will be altered, rendering the crack visible. Magnification, if available, may further help crack detection. 60 Fig 3-3 Crack detection by transillumination. Radiographic Assessment Good-quality radiographs are an essential part of the assessment of previously root treated teeth. Guidelines on quality assurance in dental radiology should be followed to optimise diagnostic information whilst limiting the radiation doses to as low