Epigenetic Connections in Malocclusion

Area of Science:

• Genetics and Developmental Biology
• Orthodontics and Dental Research
• Epigenetics

Background:

• Malocclusion results from genetic, environmental, and developmental factors.
• Epigenetic mechanisms (DNA methylation, histone modifications, non-coding RNAs) are implicated in craniofacial growth and dentoalveolar remodeling.
• Existing evidence is largely indirect, derived from in vitro studies, animal models, and related craniofacial processes.

Purpose of the Study:

• To critically evaluate the current evidence on the role of epigenetic regulation in malocclusion development.
• To assess the role of epigenetics in orthodontic tooth movement.
• To identify gaps in research and guide future clinical translation.

Main Methods:

• Structured narrative review.
• Qualitative appraisal framework considering study design, methodological rigor, and evidence directness.
• Analysis of experimental findings on epigenetic regulation by mechanical forces.

Main Results:

• Epigenetic mechanisms are dynamically regulated by mechanical forces, influencing key cellular processes like osteogenesis and chondrogenesis.
• Individual variability in orthodontic response may be linked to epigenetic factors.
• Robust causal studies directly linking specific epigenetic modifications to human malocclusion phenotypes are lacking.

Conclusions:

• While biologically plausible, a significant gap exists between current mechanistic insights into epigenetics and their clinical application in orthodontics.
• The clinical utility of epigenetic markers for diagnosing, treating, or predicting malocclusion outcomes is currently limited.
• Future research requires well-designed longitudinal human studies correlating epigenetic profiles with defined malocclusion phenotypes to establish causality and enable clinical relevance.