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Biomedical subjects

S Haynes

Publications and source records attributed to S Haynes.

At least 55 records · Page 3Linked to original sources
PubMed1986

A cephalometric study of mandibular changes in modified function regulator (Fränkel) treatment.

A cephalometric study is reported of changes in mandibular dimensions occurring in treatment with a modified function regulator derived from the Fränkel (FR1) appliance; the findings are compared with those observed in a similar group of untreated control children. Both groups consisted of 16 boys and 13 girls with Angle Class II, Division 1 malocclusions. The mean age and age range of the groups were similar (114 months and 98 to 132 months, respectively), and the mean period of observation or treatment was 3 years (range 20 to 65 months in control children, 20 to 72 months in those receiving treatment). Statistically highly significant differences (P less than 0.005) were found in the treatment group for dimensions articulare-B point and articulare-1, gonion-B point and gonion-1, occlusal plane length, and posterior border-mandibular incisor distance. Smaller statistically significant differences were observed for the dimension articulare-pogonion, and between the Bolton plane and inferior border of the mandible. The changes appear to affect the relative distances between the anterior structures of the mandible, and articulare and gonion, respectively. The increases observed were between 2 and 3 mm (2.66% to 4.65%); although these values are small in relation to the overall dimensions of the variables investigated, they may significantly affect the clinical result. The most stable dimensions were found to be the posterior border of the mandible, width of the ascending ramus, and the oblique cross section of the mandibular body; these changes varied between 0.19 and 0.43 mm (0.62% to 1.5%).

Activator Appliances↗
PubMed1986

Profile changes in modified functional regulator therapy.

Comparison of lateral cephalometric radiographs of treatment and control groups finds the changes achieved with a modified functional regulator are limited to improvement in dental and lip relations. No effects are found on mandibular growth or position in relation to the profile.

Activator Appliances↗
PubMed1986

Food choices among white adolescents: the Lipid Research Clinics Prevalence Study.

Food groups have been widely used in nutrition education but relatively few studies have employed food groups to interpret dietary intake. The 24-h dietary recalls of 534 male and 476 female adolescents, aged 10-19 yr, were analyzed using a food grouping scheme. Foods were grouped with emphasis placed on fats and carbohydrates. Frequency of use and contribution of food groups to the macronutrients were determined. When nutrient intake was analyzed as a percentage of total calories, both males and females were found to have similar profiles. More than 60% of each macronutrient was contributed by combinations of three major food groups. The meat/fish/poultry, milk/cheese/yogurt, and bread/cereal products food groups contributed 81.2% of the protein; milk/cheese/yogurt, bread/cereal products and sweets accounted for 63.0% of the carbohydrate intake; and 74.3% of the dietary fat consumption was attributable to the meat/fish/poultry, milk/cheese/yogurt, and fats food groups. There were no notable differences in the food groups used by males and females. However, differences between the sexes emerged when nutrient intakes as a percentage of calories were stratified and food group usage was investigated. Food groups associated with macronutrients that are believed to affect health status have been identified.

Adolescent↗
PubMed1978

The relationship between the rate of gastric emptying and the dumping syndrome.

Following an oral hypertonic glucose challenge, gastric emptying and changes in plasma volume were measured in 15 subjects before and in 36 subjects after a truncal or selective vagotomy with a drainage procedure. The symptoms experienced during the test were noted, and the postoperative patients divided into two groups, (a) 20 patients who experienced dumping symptoms during the test and (b) 16 patients who did not. Gastric emptying was significantly faster and the fall in plasma volume significantly greater in those patients who experienced symptoms after the ingestion of hypertonic glucose than in those who did not, clearly demonstrating that the dumping syndrome is associated with an increased rate of gastric emptying. In addition, there was a significant positive correlation between the rate of gastric emptying and the fall in plasma volume.

Dumping Syndrome↗
PubMed1977

Prevalence of upper lip posture and incisor overjet.

1,159 children (612 girls and 547 boys) aged 11-12 years were examined to determine the range and mean overjet values in four defined upper lip-maxillary central incisor relationships. No clinically significant differences were found on comparison of the data relative to each upper lip position. The findings suggest that upper lip posture is adaptive to the maxillary central incisor angulation and that the upper lip musculature is unlikely to influence the development of the incisor occlusion.

Child↗
PubMed1976

Meckel's diverticulitis due to Schistosomiasis mansoni.

An unusual case of schistosomal Meckel's diverticulitis is presented. Parasites were subsequently found in either stool or rectal biopsies of three siblings. The possibility of serious sequels makes the early diagnosis of Schistosomiasis mansoni often by simple stool and rectal biopsy examination particularly valuable.

Biopsy↗