Factors Associated with the Need for a Primary Endodontic Treatment after Single-Unit Crown Cementation: A Retrospective Case-Control Study
Bibliographic record
Abstract
INTRODUCTION: This case-control study aimed to identify factors associated with an increased risk for endodontic treatment after single-unit crown cementation and to describe the timeline of such events. METHODS: After evaluating the electronic records of all single-unit crowns placed on nonendodontically treated teeth between 1999 and 2019 and excluding teeth with preexisting questionable or confirmed endodontic disease, "cases" were identified as teeth requiring primary endodontic treatment after crown cementation. This was not examined in the current study because the cases and controls were matched by tooth type. RESULTS: Overall, 69 teeth without any suspected or confirmed past endodontic disease required an endodontic intervention after crown cementation. The mean number ± standard deviation of restorations in a tooth before crown cementation was significantly higher among the cases than the matched controls (2.16 ± 0.99 vs 0.78 ± 0.78, P < .05). Teeth with ≥2 and ≥3 previous restorations had an almost 4 (odds ratio = 3.81; 95% confidence interval, 1.56-9.29; P < .05) and almost 6 (odds ratio = 5.97; 95% confidence interval, 1.230-28.95; P < .05) times higher risk, respectively, for endodontic treatment after crown cementation compared with teeth with ≤1 restoration present before crown cementation. The majority (65%, n = 45) of teeth in the cases group required endodontic treatment during the first 3 years after crown cementation. CONCLUSIONS: The presence of multiple restorations at the time of crown cementation was identified as a significant predictive factor for the need for endodontic treatment after crown cementation in teeth with no preexisting questionable or confirmed endodontic disease. Therefore, clinicians should be aware and inform patients about the increased risk of primary endodontic treatment in teeth with a history of more than 1 restoration, especially during the first 3 years after permanent crown cementation.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.003 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".