[Expression of hypoxia inducible factor-1alpha during mouse mandibular first molar eruption and its significance].

Purpose: To investigate the expression of hypoxia inducible factor-1alpha (HIF-1α) during the eruption of mouse lower first molar, and to explore the correlation between its expression and the activity of osteoclasts.

Methods: Mouse mandibles were dissected from mice at day 1.5 to 14.5 after birth. They were then serially sectioned and stained respectively using hemotoxylin, tartrate-resistant acid phosphatase (TRAP) staining, and immunohistochemical staining. SPSS 25.0 software package was used for data analysis.

Results: During the eruption of mouse lower first molar, the thickness of the crown alveolar bone gradually decreased, so did the number of osteoclasts and the expression of HIF-1α.

Conclusions: During the eruption of mouse lower first molar, the less expression of HIF-1α, the fewer osteoclasts there were. HIF-1α may be involved in the eruption of mouse lower first molar by regulating the activity of osteoclasts.