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Changes in the Appendicular Skeleton with Age01:09

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The upper and lower limb initially develops as a small bulge called a limb bud, which appears on the lateral side of the early embryo. The upper limb bud appears near the end of the fourth week of development, with the lower limb bud appearing shortly after.
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
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Cephalometric changes during aging in subjects with normal occlusion.

Daniela Garib1, Gabriela Manami Natsumeda1, Camila Massaro1

  • 1Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Odontopediatria, Ortodontia e Saúde Coletiva, Bauru, SP, Brasil.

Journal of Applied Oral Science : Revista FOB
|October 13, 2021
PubMed
Summary
This summary is machine-generated.

Craniofacial structures undergo significant aging changes from early adulthood to old age, with distinct differences observed between males and females. Tooth loss can also influence these age-related craniofacial alterations.

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Area of Science:

  • Dentistry
  • Orthodontics
  • Human Anatomy

Background:

  • Craniofacial morphology evolves throughout the lifespan.
  • Understanding age-related changes is crucial for diagnosis and treatment planning.

Purpose of the Study:

  • To investigate craniofacial changes from early adulthood to the seventh decade.
  • To identify sex-specific differences in aging craniofacial development.
  • To assess the impact of tooth loss on these changes.

Main Methods:

  • Longitudinal cephalometric analysis of 21 individuals with normal occlusion.
  • Measurements taken at age 17 (T1) and 61 (T2).
  • Analysis included maxillomandibular relationships, dentoalveolar, and soft tissue changes.

Main Results:

  • Anterior displacement of the maxilla and mandible, increased facial and ramus height observed.
  • Vertical development of molars and mandibular incisors; mesial angulation of maxillary molars.
  • Soft tissue changes included lip retrusion and altered lip/chin thickness; sex differences in mandibular rotation noted.

Conclusions:

  • Significant aging-related dentoskeletal and soft tissue changes occur.
  • Sexual dimorphism exists in craniofacial aging patterns.
  • Tooth loss is associated with greater increases in posterior facial and ramus height.