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Ultrastructure of cementogenesis as affected by growth hormone in the molar periodontium of the hypophysectomized rat.

Abstract：

:To document the effect of hypophysectomy and growth hormone replacement on the ultrastructure of cementogenesis in the developing rat third molar, 12 female Wistar rats were randomly allocated to normal control, hypophysectomized or hypophysectomized plus human growth hormone (for 10 days) treatment groups. The results of this study by electron and light microscopy and morphometry have shown that qualitative and quantitative changes occur in the organelles of cementoblasts forming cellular cementum as a result of hypophysectomy and growth hormone replacement. After hypophysectomy, the changes of less prominent nucleoli and nuclear pores, less prominent Golgi apparatuses and decreased endoplasmic reticulum can be interpreted as diminished cementum matrix biosynthesis--an interpretation that can be confirmed morphometrically by less cellular cementum formation. Growth hormone replacement for 10 days reactivates protein synthesis and cementogenesis as evidenced by ultrastructural changes in cementoblasts and a greater production of cementum.

journal_name

J Periodontal Res

journal_title

Journal of periodontal research

authors

Clayden AM,Young WG,Zhang CZ,Harbrow D,Romaniuk K,Waters MJ

doi

10.1111/j.1600-0765.1994.tb01221.x

subject

Has Abstract

pub_date

1994-07-01 00:00:00

pages

266-75

issue

4

eissn

0022-3484

issn

1600-0765

journal_volume

29

pub_type

杂志文章

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