Retratamento endodôntico a propósito de casos clínicos

Abstract

Despite all the efforts implemented to improve endodontic treatments and develop new techniques, failure is expected in about 23% of cases. Strindberg considers failures as treatments of teeth with periapical bony rarefactions that increase, remain unchanged, decrease in size or only appear after endodontic treatment. These cases are due to the failure of inicial endodontic treatment, making it necessary to correctfaulty procedures or eradicate persistent organisms. Howevwe, there is, mong professionals, a broad range of opinions regarding the realization of retreatment and obturation techniques to use. Endodontic failure has a multifactorial etiology and the causes of treatment failure can be divided into apical leakage, surgical errors and errors in the selection of cases. Generally, the major cause of failure is the survival of microorganisms in the apical portion of the tooth, particularly Enterococcus faecalis, which is resistant to calcium hydroxide. Each clinical case must be assessed individually and treatment plan should be appropriate to the cause of failure of each one and to a variety of pre operative factors that will dictate the type and feasibility of endodontic retreatment. Various techniques have been developed for the root canal desobturation procedure, and its use is dependent on preference and subjectivity of each operator. The completion of this monograph was indeed to draw a parallel between literature and clinical side and follow the clinical course of each case, obtaining conclusions of each one.

Date of Award	17 Sept 2012
Original language	Portuguese
Awarding Institution	Universidade Católica Portuguesa
Supervisor	Manuel F. Paulo (Supervisor) & Miguel André Duarte Martins (Co-Supervisor)