Formulation development and stability studies of aqueous metronidazole benzoate suspensions containing various suspending agents.

Metronidazole is a synthetic antibacterial and antiprotozoan agent. Crystallization occurs in aqueous metronidazole benzoate suspensions caused by an anhydrate to monohydrate conversion. This study aimed to develop an aqueous metronidazole benzoate suspension that does not exhibit this hydration and the accompanying crystal growth.

Palatal finger springs in removable orthodontic appliances--an in vitro study.

Palatal finger springs are often used in removable orthodontic appliances to tip teeth in a mesiodistal direction. There is general consensus that a force of 30-50 g is required to tip a single-rooted tooth, with an activation of about 3 mm for a spring with a load/deflection rate (LDR) of 15 g/mm. The purpose of this report is to establish the magnitude of forces for finger springs made from different types of wires (i.

The epidemiology of malocclusion in Zambian urban school children.

This survey was undertaken to determine the occlusal status of a selected group of urban Zambian Black 9-12 year old children at 5 different schools in the same geographical area in order to determine their need for orthodontic treatment. The examination criteria of the Occlusal Index of Summers (1966) were used. Six hundred and one children who had not previously received orthodontic treatment were examined.

A profile of South African orthodontists: NOHS 1988/89.

The response by orthodontists to a 1988/89 National Oral Health Survey questionnaire is reported. The 54 predominantly white male respondents reflected a balanced age distribution. The majority were in solo private practice.

Spatial variation of fluorosis and fluoride content of water in an endemic area in Bophuthatswana.

The prevalence and severity of fluorosis were examined in 5 villages in one endemic area. The fluorosis indices of Thylstrup and Fejerskov and of Dean were used. 3,103 children were examined and the drinking water sources of each of the 1,635 fluorosis cases established.