Retreatment of endodontic fillings

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<jats:p><jats:bold>Abstract—</jats:bold> Effects of endodontic retreatment on quality of seal and periapical healing were assessed among 660 previously root‐filled roots. The roots were divided into either of two groups according to presence or absence of pathologic alterations in the periapical area. The retreatments, which were carried out by dental students, involved a thorough chemomechanical debridement of the root‐canal system aiming to control infection. Following a 2‐year observation period 556 roots were reexamined clinically and radiographically. The results showed that root‐fillings with technical shortcomings could, following retreatment, be markedly improved as regards effectiveness of seal and distance to the apex. A large number of lumina discernible apical to root‐filling could also be treated and filled. Seventy‐eight percent of the cases with pathologic lesion present periapically prior to retreatment either completely healed or displayed an obvious size‐reduction of the process Retreatments carried out because of technical inadequacies alone were successful in 94% of the cases. It was concluded that renewed endodontic treatment whenever possible is the method of choice when treating defective endodontic fillings complicated with pathologic processes periapically. Apical surgery may be attempted if no signs of healing are apparent following observation.</jats:p>

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