Histologic Investigation of Root Canal–treated Teeth with Apical Periodontitis: A Retrospective Study from Twenty-four Patients

Ricucci, Domenico; Siqueira, José F.; Bate, A. L.; Ford, T. R. Pitt

doi:10.1016/j.joen.2008.12.014

Cited by 330 publications

(289 citation statements)

References 34 publications

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“…The complete removal of root canal filling material is of primary importance during retreatment procedures, because residual filling material negatively affects the activity of antimicrobial agents on the infected dentin, and damages the sealing of the root canal filling 19) . This study evaluated the amount of residual filling material after reinstrumentation with TF Adaptive, ProTaper UR, Reciproc, and hand files by using CBCT.…”

Section: Discussionmentioning

confidence: 99%

Efficacy of Twisted File Adaptive, Reciproc and ProTaper Universal Retreatment instruments for root-canal-filling removal: A cone-beam computed tomography study

et al. 2016

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The aim of this study was to evaluate the efficacy of Twisted File (TF) Adaptive, Reciproc, and ProTaper Universal Retreatment (UR) System instruments for removing root-canal-filling. Sixty single rooted teeth were decoronated, instrumented and obturated. Preoperative CBCT scans were taken and the teeth were retreated with TF Adaptive, Reciproc, ProTaper UR, or hand files (n=15). Then, the teeth were rescanned, and the percentage volume of the residual root-canal-filling material was established. The total time for retreatment was recorded, and the data was statistically analyzed. The statistical ranking of the residual filling material volume was as follows: hand file=TF Adaptive>ProTaper UR=Reciproc. The ProTaper UR and Reciproc systems required shorter periods of time for retreatment. Root canal filling was more efficiently removed by using Reciproc and ProTaper UR instruments than TF Adaptive instruments and hand files. The TF Adaptive system was advantageous over hand files with regard to operating time.

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Section: Discussionmentioning

confidence: 99%

Efficacy of Twisted File Adaptive, Reciproc and ProTaper Universal Retreatment instruments for root-canal-filling removal: A cone-beam computed tomography study

et al. 2016

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“…Although chemomechanical procedures are highly effective in reducing bacterial populations within the main root canal (2,3), bacteria located in some areas of the root canal system, such as untouched canal walls, dentin tubules, isthmuses, lateral canals and apical ramifications, may still remain unaffected by instruments and irrigants and then jeopardize the treatment outcome (4). This is a result of the physical limitations of endodontic instruments and the short time irrigants remain in the root canal during instrumentation/ irrigation procedures.…”

Section: Introductionmentioning

confidence: 99%

Influence of serum and necrotic soft tissue on the antimicrobial effects of intracanal medicaments

et al. 2010

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The purpose of this study was to investigate the influence of serum and necrotic soft tissue on the antimicrobial activity of intracanal medicaments. The medicaments tested were: calcium hydroxyde/glycerin paste, calcium hydroxide/chlorhexidine paste, calcium hydroxide/camphorated paramonochlorophenol/glycerin paste, and chlorhexidine/zinc oxide paste. Survival of Enterococcus faecalis and Candida albicans exposed to the medicaments tested in the presence or absence of serum or necrotic tissue was monitored in three in vitro experiments where samples for culturing were taken at different time periods. The overall results demonstrated that the antimicrobial activity of all intracanal medicaments tested was slowed down in the presence of necrotic tissue. Calcium hydroxide pastes in glycerin or chlorhexidine were significantly affected by serum. Of the medicaments tested in this study, the least affected was the calcium hydroxide/camphorated paramonochlorophenol/glycerin paste.

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“…1 The main reason for the failure of root canal treatment is the inadequate removal of pulp tissue and microorganisms from the root canal system. 2 Therefore, it is imperative that the clinician must have a thorough knowledge of root canal morphology and its possible variations to achieve a high level of success. The root canal system has anatomic complexities in the form of additional canals, intercanal communications, lateral canals, and multiple foramina.…”

Section: Introductionmentioning

confidence: 99%

Middle Mesial and Middle Distal Canals in Mandibular First Molar

Jabali

2018

The Journal of Contemporary Dental Practice

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Background: Root canal anatomy is a complex entity. The main objective of root canal treatment is to get rid of the infection and have a good apical and coronal seal with an appropriate filling. Inability to achieve thorough cleaning and shaping followed by three-dimensional obturation of the root canal system usually causes root canal treatment failure. For this reason, clinicians should be aware of these anatomical variations to achieve successful treatment. Aim:The aim of this article is to report on the successful treatment and follow-up of mandibular first molar with additional middle mesial (MM) and middle distal (MD) canals.Case report: A 29-year-old white male patient reported with a complaint of pain in relation with tooth #19. On clinical examination, diagnosis of symptomatic irreversible pulpitis with symptomatic apical periodontitis and condensing osteitis was made and nonsurgical root canal treatment was planned. Initially, two mesial and two distal canals were located, and the patient was planned for the obturation in the second visit. The complaint of mild persistent symptoms gave a possibility of additional canals. Under the dental operating microscope and selective troughing on the floor of the pulp chamber with ultrasonic tips, additional canals were located as MM and MD canals. Conclusion:Leaving some area of the root canal system untreated is found to be one of the main reasons for root canal treatment failure. Dentists should take advantage of new tools, such as dental operating microscope and ultrasonic tips to be able to locate and treat the hidden and unusual anatomy.Clinical significance: Mandibular first molar with six canals is very rare to encounter. Clinician should have a thorough knowledge of these unusual anatomy to avoid treatment failure due to incomplete disinfection of the root canal system.

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Histologic Investigation of Root Canal–treated Teeth with Apical Periodontitis: A Retrospective Study from Twenty-four Patients

Cited by 330 publications

References 34 publications

Efficacy of Twisted File Adaptive, Reciproc and ProTaper Universal Retreatment instruments for root-canal-filling removal: A cone-beam computed tomography study

Efficacy of Twisted File Adaptive, Reciproc and ProTaper Universal Retreatment instruments for root-canal-filling removal: A cone-beam computed tomography study

Influence of serum and necrotic soft tissue on the antimicrobial effects of intracanal medicaments

Middle Mesial and Middle Distal Canals in Mandibular First Molar

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