A histological and ultrastructural study of the tidemark in human condylar cartilage / 中华口腔医学杂志
Chinese Journal of Stomatology
;
(12): 425-427, 2002.
Artículo
en Chino
| WPRIM
| ID: wpr-347336
ABSTRACT
<p><b>OBJECTIVE</b>To study the histology and ultrastructure of the tidemark in the adult condylar cartilage and their significance.</p><p><b>METHODS</b>After embedded in paraffin, 50 adult condyles were stained with HE, partly with Van-Gieson and histochemical methods, then observed by light microscope. 3 cases of the tidemark region were observed by transmission electron microscope, another 5 cases were studied by scanning electron microscope.</p><p><b>RESULTS</b>In the tidemark region, there had shown the presence of the AKP and calcium, absence of the proteoglycan, abundance of the membrane-bound matrix vesicles, crystals of hydroxyapatite and lipid nodule-like substances, which were often observed in the load-bearing areas. The collagen fibrils of the noncalcified cartilage crossed the tidemark gradiently and were continuous with those of the calcified cartilage; a band of horizontal fibrils surrounded the whole tidemark region, which was wider in the load-bearing areas than that in the nonload-bearing areas and which interweaved with the gradient fibrils so as to form a net. Digested with papain, the surface of the tidemark was highly undulating, and a lot of chondrocyte lacunae were seen on the surface, which were surrounded by calcified tissues.</p><p><b>CONCLUSIONS</b>In the region of the tidemark, physiological calcification takes place and is more active in the load-bearing areas; gradient and horizontal fibrils interweave with each other, which is correlated with the force on the articulation.</p>
Texto completo:
Disponible
Índice:
WPRIM (Pacífico Occidental)
Asunto principal:
Articulación Temporomandibular
/
Microscopía Electrónica
/
Microscopía Electrónica de Rastreo
/
Biología Celular
/
Histocitoquímica
/
Cóndilo Mandibular
/
Métodos
Límite:
Adulto
/
Femenino
/
Humanos
/
Masculino
Idioma:
Chino
Revista:
Chinese Journal of Stomatology
Año:
2002
Tipo del documento:
Artículo
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