Cellular inhibition produced by dental curing lights is a heating artifact
Bibliographic record
Abstract
Dental curing lights deliver energy in the 380-520 nm wavelength range. It has been reported that irradiation in these wavelengths may have a negative effect on cell function. We examined the effect of three dental curing lights on the viability of mouse (NIH3T3, Balb/c3T3) and human (HGF-1) fibroblastic cells, and epithelial (HT-29) cells grown in culture. Cell inhibition was observed using the MTT assay of mitochondrial function and measures of DNA fragmentation and DNA synthesis. Analyzing the experimental method and careful measurement of the temperature adjacent to the cell monolayer during irradiation showed that damage to the cells was not due to cumulative light exposure, but instead occurred when the temperature of the culture medium rose above 42 degrees C. We conclude that dental curing lights do not cause cell damage as a direct result of the light irradiation. Instead it is caused by the local temperature increase in the cells.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.008 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.004 | 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 teacher head, 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".