title: Periodontal ligament thickness as related to age and mesiocclusal drifting of teeth:a histometric study.
mesh_terms: D000367:Age Factors; D000818:Animals; D009811:Odontometry; D010513:Periodontal Ligament / Q000033:anatomy & histology / Q000502:physiology*; D051381:Rats; D013223:Statistics as Topic; D014085:Tooth Migration