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- W2372102417 abstract "Objective:To investigate the effect of the retreatment of maxillary second molar root canals using endodontic microscope and ultrasound equipment.Method:Choose 80 maxillary second molar cases with initial treatment failure,use endodontic microscope and ultrasound technique during canal negotiation,use crown-down technique with NickelTitanium file during preparation of root canal system,use lateral and vertical compaction techniques during root canal obturation,record the success rate of retreatment by taking X-ray films.Result:Among 80 cases with retreatment,there are 71 successful root canal obturation cases,which success rate is 88.7 %.Success rate of six months follow-up is 88.2 %.Conclusion:Because there are factors of fusion,variation and excessive curve in maxillary second molar root canals,it is easily to cause initial treatment failure by canals unfinding,ledge forming,instrument fracturing,root canal-side wearing and calcification.Satisfactory results can be obtained by using endodontic microscope and ultrasound technique in retreatment.But we should use ultrasound equipment correctly to avoid root canal-side wearing." @default.
- W2372102417 created "2016-06-24" @default.
- W2372102417 creator A5032886820 @default.
- W2372102417 date "2010-01-01" @default.
- W2372102417 modified "2023-09-26" @default.
- W2372102417 title "The retreatment of maxillary second molar root canals under endodontic microscope" @default.
- W2372102417 hasPublicationYear "2010" @default.
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