Recorded Pulp Exposure Size and Haemostatic-Control Categories During Primary Molar Pulpotomy

Introduction and aims Variation in routinely recorded haemostatic control during primary molar pulpotomy is poorly characterized. This hypothesis-generating secondary analysis examined the association between recorded pulp exposure size and the recorded haemostatic-control category ≥1 minute. Methods This retrospective analysis included 81 iRoot BP Plus treatment records, representing 79 patient-tooth combinations in 65 children. Available time entries were classified as ≥1 vs <1 min, without implying a validated clinical threshold. The primary logistic model included recorded pulp exposure size as a continuous linear term, adjusted for age and molar type, and used finite-sample-corrected child-clustered robust inference. Sensitivity analyses and post hoc influence diagnostics examined dependence on analytical choices. Results The ≥1-minute category included 20/81 records (24.7%), comprising 4/51 at 1 mm and 12/24 at 2 mm. The model-specific adjusted odds ratio per 1-mm increase was 4.70 (95% confidence interval, 1.42-15.50). Only 6 observations exceeded 2 mm, upper-level observed proportions were non-monotonic, and restriction to 1-2 mm substantially changed the estimated magnitude. Conclusion Larger recorded pulp exposure size was associated with the recorded haemostatic-control category ≥1 minutes in this hypothesis-generating secondary analysis. The clinical significance remains uncertain because of measurement limitations, sparse upper-range observations, and residual procedural confounding. The findings do not establish a biological dose-response relationship, causality, diagnostic or prognostic utility, or a treatment threshold. Clinical Relevance The findings support standardized prospective recording of exposure dimensions and haemostasis time in future studies. They do not support using exposure size to diagnose pulpal status, select treatment, or predict outcome.