Glass-ionomer cements: a 12-month evaluation.
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Adult↗
Biomedical subjects
H Ngo
Publications and source records attributed to H Ngo.
[Choice of the 3d portion of the jejunum for reconstruction of the pharynx in circular pharyngolaryngectomies. Indications and advantages].
Many procedures are used for reconstruction of a pharyngeal gutter after circular pharyngolaryngectomy, interrupter of digestive continuity. The operation chosen was used of third part of jejunum for reconstruction, and its indications and limitations are described. The choice was based on anatomic data from dissection of 100 cadavers and values for different measurements performed (length of transplant, height of mesentery, caliber and length of vessels), and more particularly on constancy and reliability of vascularization of this digestive segment. To these advantages are added bacteriologic, technical, histologic and physiologic reasons. Results are analyzed of 11 operations carried out in the same department, from among a larger group comprising now 45 cases. Postoperative course was usually uncomplicated with rapid restoration of deglutition (a mean of 11.77 days in 9 of the 11 cases). Preoperative radiotherapy is not a contraindication and postoperative radiotherapy should be given routinely as a complement to surgery. It is usually well tolerated and transplant necrosis is not provoked. Nevertheless, the seriousness of this type of lesion is underlined by the high incidence of carcinologic failures, with an elevated risk of local and regional recurrence and of distant metastases.
Aged↗
Evidence for nonrandom regression of dendrites of Purkinje neurons during aging.
This study examined dendritic networks of Purkinje neurons for randomness of age-related changes in cerebella from Fischer 344 rats at three ages. Terminal dendritic segments were studied in relation to their distance from the neuronal soma (path length). The data indicated that the terminal dendritic segments furthest from the cell body were preferentially affected during aging and there was a redistribution of the remaining terminal segments in cells from rats of the intermediate age group. The data also suggested that dendritic regrowth occurred in proximal regions of networks from rats in the oldest group.
Age Factors↗
Rice as a vehicle for dietary fluoride uptake.
The objective of this study was to analyze aspects of the metabolism and bio-availability of fluoride after consumption of a sample of polished white rice containing 5.6 ppm fluoride ion. Up to 400 g of fluoridated rice was consumed by three volunteer adult subjects over specific time periods on two separate occasions. Saliva concentrations were elevated immediately and remained so 90 minutes following ingestion, among other indications. It was concluded that polished rice has the potential to be a useful vehicle for dietary fluoride transport.
Adult↗