Observational studyEuropean endodontic journal2025
Periapical Healing Following Root Canal Treatment with Narrow (0.04) Or Wide (0.07) Preparation Tapers in Private Practice: A Retrospective Observational Cohort Study.
Observational study in European endodontic journal, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
1 citing paper in PubMed.
- Three-Year Apical Outcomes in Teeth with Apical Periodontitis Following Primary Endodontic Treatment or Nonsurgical Retreatment: A Retrospective Clinical Study.Journal of clinical medicine · 2026Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectiveThe optimal root canal preparation taper remains a subject of debate; smaller sizes putatively favoring fracture resistance and larger, better disinfection. This study evaluated the periapical healing outcome following narrow (0.04) tapered root canal preparation compared with wider tapered preparations (0.07) during non-surgical root canal treatment (NSRCT).
methodsClinical and radiographic records of NSRCT completed by a single operator in an endodontic specialist practice were retrospectively reviewed. Two-hundred-and-eighty-nine teeth prepared with either a 0.04 (n=157) or 0.07 (n=132) taper, as guided by pre-operative canal size, met the inclusion criteria and were reviewed for 2 years. Loose (healed and healing) criteria was used to determine the outcome of periapical healing. Logistic regression and stratified outcome analyses were used to investigate the effect of taper and other covariates on periapical healing; the covariates analysed were sex, age, tooth type, size of radiolucency, sinus tract, periodontal defects, cracks, mishaps, number of visits, patency, quality of root filling, quality of restoration, and access cavity design—traditional or non-traditional/minimally invasive. Potential confounders were addressed using a multivariable model (odds ratios [ORs] with 95% confidence intervals [CIs]; p<0.05).
resultsThe periapical healing rates of teeth treated with 0.04 (95.5%) and 0.07 (93.9%) tapers were comparable (p=0.5). The presence of iatrogenic errors (n=8) had a significant negative effect on the success rate (p=0.03).
conclusionIn this cohort study, comparable healing rates were observed between 0.04 tapered canal preparations and wider (0.07) tapers in teeth with narrow canals. (EEJ-2025-06-094).
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