[Time effect of sinusoidal electromagnetic field on enhancing the maturation and mineralization of osteoblasts in vitro].
This in vitro study exposed newborn rat calvarial osteoblasts to 50 Hz sinusoidal electromagnetic fields at 1.8 mT for different daily exposure times (0.5–3.0 h). The authors report inhibited osteoblast proliferation at longer exposure times, alongside increased differentiation markers (ALP activity) and mineralization (calcified nodules) in certain exposure-time groups. Overall, the findings are mixed, suggesting reduced proliferation but enhanced maturation/mineralization under some exposure durations, with 1.5 h reported as most active for maturation/mineralization.
Key points
- The experiment tested time-dependent effects of 50 Hz, 1.8 mT sinusoidal electromagnetic fields on osteoblast cultures.
- Cell proliferation assessed by MTT at 48 h was reported as inhibited in the 2.0–3.0 h exposure groups versus control.
- ALP activity was reported as increased in several shorter-to-moderate exposure-time groups at multiple measurement days.
- At 9 days, ALP activity was reported higher in the 1.0 h, 1.5 h, and 2.0 h groups compared with control and other groups.
- Mineralization assessed by Alizarin Bordeaux staining showed more calcified nodules in the 1.0–2.0 h groups than control.
- Cells exposed to the field were described as showing a spiral-like arrangement after 8 days.
- The authors conclude SEMF exposure inhibits proliferation but enhances osteoblast maturation and mineralization, with 1.5 h described as strongest.
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AI-generated summaries may be incomplete or incorrect. This content is for informational purposes only and is not medical advice.
AI-generated summaries may be incomplete or incorrect. This content is for informational purposes only and is not medical advice.
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