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Biomedical subjects

E Morrison

Publications and source records attributed to E Morrison.

89 records · Page 5Linked to original sources
PubMed1980

Comparison of results following three modalities of periodontal therapy related to tooth type and initial pocket depth.

Results following three modalities of periodontal therapy (subgingival curettage, modified Widman flap surgery, and pocket elimination or reduction surgery) in 78 patients over 8 years were compared for variations in pocket depth and clinical attachment level related to tooth types (maxillary molars, mandibular molars, maxillary biscupids, mandibular biscupids, maxillary anterior teeth, mandibular anterior teeth). The analysis was based on a classification of three severity groups according to initial crevice or pocket depth (Class I, 1-3 mm; Class II, 4-6 mm; and Class III, 7-12 mm) and with patient's means of measurements being the experimental units for the statistical analysis. Reduction in pocket depth and gain of clinical attachment for pockets 4 mm or deeper occurred following all three methods of treatment, and was well sustained over 8 years. No one modality of treatment was consistently superior to any of the other two with regards to sustained reduction of pocket depth and gain of clinical attachment. Surgical pocket elimination or reduction did not enhance the prognosis for maintenance of periodontal support in either moderate or advanced periodontal lesions anywhere in the mouth compared with more conservative modalities of treatment. In spite of prophylaxis and instruction in home care every 3 months, there was a slight progressive loss of attachment over time in areas of shallow crevices (1-3 mm).

Bicuspid↗
PubMed1978

Dietary protein and lead retention.

The effects of dietary protein content on lead retention were studied in young rats. In experiments lasting between 3 and 6 weeks, rats given diets containing lead and 20% casein were fed ad libitum or were pair fed with rats given diets containing 6.5 or 7.5% casein. Among rats given 20% casein, lead retention was inversely related to growth rate. A reduction of dietary protein either had no effect or reduced lead retention. In other experiments lasting 4 days and using 203Pb, given orally or intraperitoneally, the recovery of isotope in the gutfree carcass was unaffected or reduced by a reduction in dietary protein. Blood and liver lead often increased when kidney and carcass lead decreased in response to a reduction of dietary protein. Conflicting observations on the effect of low-protein diets on lead retention may thus be due to opposing effects of low dietary protein and decreases of growth rate and to different responses of different tissues.

Animals↗
PubMed1978

The effect of age on the absorption and excretion of lead.

The retention (the proportion of ingested or administered lead found in the carcass at slaughter) of lead in the carcass and tissues of rats given 203Pb intraperitoneally or by mouth was measured over a period of a few days at 3-month intervals for 9 months from weaning. Total carcass retention of 203Pb administered intraperitoneally reached a minimum at 6 months of age, but the retention of 203Pb in blood, liver, and kidney changed little with time. When 203Pb was given by mouth, the fraction of the dose absorbed and the fraction retained in the carcass reached a minimum at 6 months, but the recovery in the tissues continued to decrease up to the end of the experiment. The addition of 20 mg of lead/kg of diet had no consistent effect on the metabolism of 203Pb.

Absorption↗
PubMed1974

The effects of explicit timing and feedback on compositional response rate in elementary school children.

The effects of several variables on compositional response rate were investigated in three classrooms. After establishing baseline composition rates in each of the three classrooms, an experimental phase was introduced that consisted of: explicit timing of the children's composition period with a stopwatch, immediate feedback on the number of words each child produced, public posting of the greatest number of words written by each child to date, and instructions to try to exceed their highest score. In the second-grade classroom, these conditions were introduced, removed, and re-introduced. In two fifth-grade classrooms, these conditions were introduced according to a multiple baseline, across classes. In all cases, introduction of the experimental conditions led to a doubling of rate of words written by students and an increase in subjective quality ratings of compositions made by independent judges.

Journal Article↗
PubMed1970

Crude craftsmen.

Explore the source record for details and available documents.

Egypt↗
PubMedDate not supplied

An interim report of an intervention strategy for diabetes care in Jamaica.

The high prevalence (17.9%) of diabetes mellitus and its attendant costs have been recognized for some time. The diabetic public has hitherto been too oriented to seeking health care at the secondary and tertiary health care centres; a much too costly approach. As a part of a wellness promotion thrust as well as an awareness and intervention strategy, a number of health care agencies have collaborated in a training programme of lay diabetes facilitators. This was intended to allow a domino effect of "each one teach one" within the community. This intervention programme was undertaken over an 18-month period. No significant changes were achieved in glycaemia levels. The impact on hospital admissions and community awareness is yet to be assessed. Laboratory results indicated good correlation between glycosuria and hyperglycaemia. This could influence the thrust in maintaining glycosuria assessment alongside blood glucose monitoring. This approach would have a cost benefit for government clinics islandwide. Whilst it may be difficult to identify any one parameter that may be responsible for change, it will be possible to assume that this intervention strategy, the only innovation in the health care delivery modalities, may have contributed.

Aged↗