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Κυριακή 18 Σεπτεμβρίου 2022

Effectiveness of root canal treatment for vital pulps compared with necrotic pulps in the presence or absence of signs of periradicular pathosis: a systematic review and meta‐analysis

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Abstract

Background

Pre-operative pulpal status may influence the outcomes of root canal treatment (RCTx) according to various measures used.

Objectives

To compare effectiveness of RCTx of teeth with a vital pulp versus a necrotic pulp using a range of clinical and patient-related outcomes, for the development of S3-Level clinical practice guidelines.

Methods

A search was conducted in the PubMed-MEDLINE, Scopus, EMBASE, Google scholar databases and available repositories, followed by hand searches, until 29 March 2022. Clinical studies published in English language comparing the stipulated outcomes of RCTx of teeth with vital versus necrotic pulp were included. The Newcastle-Ottawa Scale was adapted to assess study quality. Effects of pulpal status were estimated and expressed as risk ratio (RR) using fixed- and random-effect meta-analyses. The quality of evidence was assessed through the Grading of Recommendations Assessment, Development, and Evaluation tool.

Results

Twenty-eight studies published between 1961 and 2021 were included. Five studies have investigated the 'tooth survival' outcome, four reported pulpal status was not a significant predictor, consistent with meta-analysis finding (RR: 1.00; 95% CI: 1.00, 1.00; n=3). Seven studies reported pulpal status had no significant influence on post-operative pain, regardless of duration after treatment. Sixteen studies have analysed 'periapical health', eleven revealed pulpal status had no significant influence. Meta-analyses revealed the influence was not significant if pre-operative periapical radiolucency was absent (RR: 0.95; 95% CI: 0.90, 1.00; n=9) but significant if it was present (RR: 1.12; 95% CI: 1.05, 1.19; n=11). Most studies were classified as 'some concerns' (n=16) to 'low' (n=10) risk of bias (RoB).

Discussion

Evidence is limited and only available for three outcomes when comparing the effectiveness of RCTx in permanent teeth with vital pulp versus pulp necrosis. Nevertheless, the quality of available evidence was moderate to high. The 'periapical health' data heterogeneity could be explained by pre-operative radiolucency, thus RCTx was found more effective for prevention than resolution of apical periodontitis.

Conclusions

There was no significant difference in the 'tooth survival', 'post-operative pain' and 'evidence of apical radiolucency' outcomes of RCTx in teeth with vital or necrotic pulps.

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