Key result
Tooth eruption disorders were associated with increased periostin expression and a decreased RANKL/OPG ratio, and removing coronal resistance allowed for normal tooth eruption.
Why the study?
The study aimed to explore the etiology and treatment selection for tooth eruption disorders from the perspective of extracellular matrix effects on dental follicle osteoclast differentiation.
Case Report (n=2)
No
Tooth eruption disorders may involve abnormal periostin remodeling affecting osteoclast differentiation, but normal eruption can often be achieved by removing coronal resistance.
Answers are grounded in this paper and cite their sources.
May implicate periostin dysregulation in eruption disorders; hypothesis-generating and should not alter practice without prospective validation.
BACKGROUND: This study analyzed the dental follicle and alveolar bone of two patients with tooth eruption disorders, aiming to provide some reference for exploring the etiology and selecting treatment plans of this disease from the perspective of the influence of extracellular matrix on osteoclasts differentiation in dental follicle. CASE SUMMARY: Collect dental follicle and alveolar bone tissue from one patient with single tooth eruption disorder and one patient with full permanent tooth eruption disorder, respectively. Simultaneously collect the dental follicle and alveolar bone tissue of obstructed teeth that need to be extracted due to orthodontic treatment as the control group. Hematoxylin and eosin (HE) staining was used to observe the morphology of dental follicle cells. Immunohistochemical staining was used to observe the expression of periostin, receptor activator of nuclear factor kappa B ligand (RANKL), and osteoprotegerin (OPG) protein in dental follicle and alveolar bone tissue. And observe the eruption of teeth after removing resistance from the crown of the permanent tooth germ. CONCLUSION: HE staining of two cases of dental follicle tissues showed that the volume of dental follicle cells decreased, the nuclei were condensed, and there seemed to be cellular fibrosis. The immunohistochemical staining showed that both the dental follicle and alveolar bone tissue exhibited increased expression of periostin, decreased expression of RANKL and OPG proteins, and decreased RANKL/OPG ratio. After removing resistance, the permanent tooth germ often appears to have normal eruption. Tooth eruption disorders may be accompanied by abnormal remodeling of periostin, which affects the differentiation function of osteoclasts in the dental follicle and leads to metabolic imbalance of alveolar bone, resulting in tooth eruption disorders. Whether it is a single or full permanent tooth eruption disorder, once the coronal resistance is removed, the teeth can often erupt normally.
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Cai et al. (2025) conducted a case report in Tooth eruption disorders (n=2). Removal of coronal resistance vs. Normal dental follicle tissue (control group) was evaluated on Expression of periostin, RANKL, and OPG in dental follicle and alveolar bone, and subsequent tooth eruption. Tooth eruption disorders were associated with increased periostin expression and a decreased RANKL/OPG ratio, and removing coronal resistance allowed for normal tooth eruption.
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