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The influence of vinegars on exposure of dentinal tubules:a SEM evaluation
Dentin sensitivity Diet Smear layer
2009/10/20
Dentin hypersensitivity is a common painful condition observed in clinics. Dietary habits have been much associated with its development and persistence during and following periodontal treatment. The...
Diffusion ability of endotoxin through dentinal tubules
Endotoxins Tooth permeability Dentin Root canal
2009/10/19
The aim of this study was to evaluate the ability of endotoxin to diffuse through dentinal tubules towards the cement and to observe the period of time needed for it to reach the external root surface...
Evaluation of the diffusion capacity of calcium hydroxide pastes through the dentinal tubules
Chlorhexidine Calcium hydroxide Dentin
2009/10/16
This study aimed to evaluate the diffusion capacity of calcium hydroxide pastes with different vehicles through dentinal tubules. The study was conducted on 60 extracted single-rooted human teeth whos...
Diverticula of human seminiferous tubules in the normal and pathologic testis
human seminiferous tubules pathologic testis
2009/2/23
The occurrence of diverticula in human seminiferous tubules was investigated in the adult human testis in normal as well as physiologic (aging) and pathologic (germ cell depletion, obstruction of ma...
Numerous groups of small tubules were observed in the semen of two infertile patients. These structures were about 80 nm in diameter and could be observed within larger concentric tubules. They did ...
Age-related variation in seminiferous tubules in men. A stereologic evaluation
Age-related variation seminiferous tubules men
2009/2/23
Tubular boundary tissue and seminiferous epithelia were evaluated stereologically in testes from 28 men aged 20 to 48 years and 28 men aged 50 to 90 years. Testes obtained at autopsy within 15 hours...
Organ culture of rat caput epididymal tubules in a perifusion chamber
Organ culture rat caput epididymal tubules perifusion chamber
2009/2/20
We have been able to culture caput epididymal tubules from rats by modifying an organ culture system (Orgebin-Crist et al, 1980) which was used to culture rabbit corpus epididymal tubule segments. T...
The effect of estrogen administration in vivo on the elemental composition of the intraluminal fluids of the seminiferous tubules, rete testis, and epididymis of the rat
epididymis spermatozoa estrogen elements
2009/2/19
The maturation of spermatozoa in the epididymis is dependent upon the presence of androgens. This study examined the effects of androgen suppression by estradiol valerate on the elemental compositio...
Endogenous Steroids in the Rat Seminiferous Tubules. Comparison of the Stages of the Epithelial Cycle Isolated by Transillumination-Assisted Microdissection
androgens seminiferous tubules rats stages of spermatogenesis transillumination
2009/2/19
A microdissection procedure is described that allows the isolation of segments of rat seminiferous tubules in different stages of the epithelial cycle. This procedure is based on spermatogenic sta...
The Effects of Experimental Cryptorchidism on the Entry of [3H]-Inulin and [3H]-Horseradish Peroxidase into the Lumen of the Rat Seminiferous Tubules
cryptorchidism blood-testis barrier rat testicle seminiferous tubule
2009/2/19
The objective of this research was to determine if experimental cryptorchidism causes significant changes in the rat blood-testis barrier. Micropuncture of the seminiferous tubules of normal, sham...
Turnover of Monocytoid Cells Within the Limiting Membrane of Rat Seminiferous Tubules
testis seminiferous tubules limiting membrane mononuclear leukocyte cell renewal
2009/2/19
The mode of renewal of mononuclear leukocytes found between the myoid cells forming the limiting membrane of rat seminiferous tubules was investigated by histometric methods. The average number of...
Focal Changes in the Seminiferous Tubules of Vasectomized Hamsters
vasectomy testis seminiferous tubules hamster
2009/2/19
The hamster testis was studied by light and electron microscopy at intervals of two weeks, five months, and one year after vasectomy. No changes were detected at two weeks, but most testes showed mi...
Is Leydig cell steroidogenic function affected by the germ cell content of the seminiferous tubules?
Leydig cell steroidogenesis
2009/2/17
The effect of testicular germ cell content on Leydig cell steroidogenic function in vivo in adult rats was examined. Three experimental paradigms were used to effect germ cell changes. First, a vita...
Ultrastructural observations of spermatogenesis following transplantation of rat testis cells into mouse seminiferous tubules
Testis spermatogenesis transplant rat mouse
2009/2/17
The testes of busulfan-treated immunodeficient mice receiving seminiferous tubule injections of testis cells from rats were examined by light and electron microscopy. The presence of active rat sper...
Testosterone and spermatogenesis: evidence that androgens regulate cellular secretory mechanisms in stage VI-VIII seminiferous tubules from adult rats
Testosterone spermatogenesis androgens regulate cellular secretory mechanisms adult rats
2009/2/13
The aim of this study was to investigate the effect of testosterone manipulation on the quantitative synthesis and secretion of a number of specific proteins produced by seminiferous tubules (ST) ...