Residual monomer release dynamics in heat- and cold-cured dental polymethyl methacrylates: a pilot study
Bibliographic record
Abstract
Residual methyl methacrylate (MMA) in polymethyl methacrylate (PMMA) is a risk factor in removable prostheses due to its potential cytotoxicity. Objective. To assess the release dynamics of MMA from domestically produced heat- and cold-cured PMMA samples during the first 10 days post-polymerization. Materials and methods. Standardized specimens (10×10×4 mm) were fabricated from heat-cured PMMA and cold-cured PMMA. Samples were stored in deionized water at 37°C, and the MMA concentration in the eluates was measured on days 1, 3, 6, and 10 by micellar electrokinetic capillary chromatography. Results. In the heat-cured group, the mean MMA concentration ranged from 0.237 to 0.641 µg/mL (p=0.480), while in the cold-cured group it ranged from 0.796 to 5.443 µg/mL (p=0.109). No statistically significant changes in MMA levels were observed over the monitoring period (p> 0.05). Conclusions. Under the conditions tested—storage in deionized water for up to 10 days—the storage duration does not affect the residual monomer content in PMMA. These findings are important for developing PMMA post-curing protocols prior to clinical application.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
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".