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[Morphological basis on periodontal Ruffini endings]

T Maeda1, H Ohshima

  • 1Department of Oral Anatomy, Niigata University School of Dentistry, Japan.

Kaibogaku Zasshi. Journal of Anatomy
|June 9, 1998
PubMed
Summary

Periodontal Ruffini endings are key mechanoreceptors in the periodontal ligament, crucial for mastication. These specialized nerve endings exhibit significant neuroplasticity and are vital for sensing tooth deformation.

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Area of Science:

  • Neuroscience
  • Oral Biology
  • Histology

Context:

  • The periodontal ligament (PDL) provides sensory feedback essential for mastication.
  • PDL contains nociceptors and low-threshold mechanoreceptors, including Ruffini endings.

Purpose:

  • To detail the ultrastructure, histochemical markers, and neuroplasticity of periodontal Ruffini endings.
  • To explore the role of mechanical stimuli in the development of these mechanoreceptors.

Summary:

  • Periodontal Ruffini endings, classified as low-threshold slowly adapting type II (SA II) mechanoreceptors, are vital for mastication.
  • Ultrastructurally, they feature expanded axon terminals with axonal spines and are identified by specific enzyme activities.
  • These endings demonstrate high neuroplasticity, indicated by p75-NGFR and GAP-43 immunoreactivity, suggesting mechanical stimuli are crucial for their maturation.

Impact:

  • Provides a detailed understanding of mechanoreceptor function in the PDL.
  • Highlights the neuroplastic potential of periodontal Ruffini endings.
  • Suggests avenues for future research into the development and regeneration of these sensory receptors.

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