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Biomedical subjects

D Magnusson

Publications and source records attributed to D Magnusson.

At least 19 recordsLinked to original sources
PubMed1998

Five-year clinical evaluation of Procera AllCeram crowns.

STATEMENT OF PROBLEM: Esthetic demands of patients and practitioners for an all-ceramic crown in both anterior and posterior regions of the dental arches has prompted the development of the Procera AllCeram crown. Long-term clinical trials that evaluate the strength and naturalness of the Procera AllCeram crown are lacking. PURPOSE: This prospective study was initiated to evaluate the clinical performance of 100 Procera AllCeram crowns after 5 years in service. MATERIAL AND METHODS: One hundred Procera AllCeram crowns were fabricated for 58 patients (20 men and 38 women). Patients were treated by 4 general dental practitioners. Crown placement involved both the anterior and posterior regions of the dental arches. Crowns were examined at baseline and once a year during the 5 years that followed and evaluated at each appointment with the California Dental Association's quality assessment system. RESULTS: Of the 97 crowns remaining in the study after 5 years, only 3 crowns had experienced a fracture through the veneering porcelain and the aluminum oxide coping material. Two additional crowns were replaced as a result of fractures of only the veneering porcelain. One crown was replaced as a result of recurrent caries. All remaining crowns were ranked as either excellent or acceptable for surface/color, anatomic form, and marginal integrity. CONCLUSION: The 5-year clinical observations and ranking with the California Dental Association's quality assessment criteria supported the conclusion that Procera AllCeram crowns may be used in all areas of the mouth.

Aluminum Oxide↗
PubMed1997

A person-oriented approach in research on developmental psychopathology.

There is a growing acceptance of a holistic, interactionistic view in which the individual is seen as an organized whole, functioning and developing as a totality. This view emphasizes the importance of patterns of operating factors. Within this framework, a standard variable-oriented approach, focusing on the variable as the main theoretical and analytical unit, has limitations. A person-oriented approach would often be preferable, where the main theoretical and analytical unit is the specific pattern of operating factors. Such an approach is presented here, focusing on individual development and psychopathology. A brief theoretical and methodological overview is given and a classification approach is emphasized. Empirical examples concerning the longitudinal study of adjustment problems illustrate a number of issues believed to be important to development and psychopathology: problem gravitation, the significance of single variables and of patterns, the developmental study of syndromes (= typical patterns), and the detection of "white spots" in development.

Adaptation, Psychological↗
PubMed1991

School performance and IQ-test scores at age 13 as related to birth weight and gestational age.

The cohort in the present longitudinal research program consisted of 873 children in an entire school grade, in a Swedish community. The present results showed a main effect of birth weight; low birth weight (LBW) children had lower school performance and intelligence-test (IQ) scores at age 13 than did normal birth weight (NBW) children irrespective of parental SES. Second, there was no significant main effect of gestational age (GA) on scholastic performance and IQ-test scores. Third, there was a significant main effect of the combination of birth weight and GA on scholastic performance and IQ-test scores. The LBW children born at term (38-40 pregnancy weeks; pw) had significantly lower scores and school grades as compared to the control group while the LBW children born with short gestational age (34-37 pw) and with very short gestational age (less than 34 pw) had significantly lower scores and marks in fewer areas of academic attainment.

Achievement↗
PubMed1991

Cooperative teaching project: a model for students at risk.

This article describes an innovative teaching model designed to impact students at risk with the cooperative efforts of regular and special education in Grades K-3. Evaluation outcomes are presented that show the model has a positive effect on individual student performance, total building progress as measured by curriculum based measurement, special education referrals, and attitudes of participating teachers.

Child↗
PubMed1991

WISC-test scores at the age of 10 for children born to women with risk pregnancies.

The subjects (N = 50) were born to mothers who had earlier participated in an extensive clinical investigation during their pregnancies. Maternal serum hormone levels were investigated from pregnancy week 20 and on to partus. Fourteen children were born small-for-gestational age (SGA) and eight pre-term appropriate-for-gestational age (AGA). Each SGA child had two control children, born to mothers with normal or high serum levels of alpha-fetoprotein (AFP) in pregnancy week 16-17. Elevated serum levels of AFP was considered to be a sign of fetal stress. All 50 children were administered the WISC-test at 10 years of age. The SGA children had lower scores than control children in Performance and Full scale scores. The pre-term SGA children had lower scores than the controls in Verbal, Performance and Full scales. That was not the case for on-time SGA and pre-term AGA children. Girls born to smoking mothers performed less well than girls of non-smoking mothers on the Verbal scale. Positive correlations of maternal serum hormone levels (oestriol, hCG, and hPL) and WISC-test scores were present for girls. For boys a single maternal hormone in pregnancy (prolactin) was correlated with WISC-test scores at 10 years of age.

Child↗
PubMed1990

Behavior at 10 and 13 years of age for children with low birth weight.

This study was based on data from a longitudinal research program. The cohort consisted of 874 normal children in an entire school grade in a Swedish community. The aim of the study was to investigate the relation between birth weight and behavior at school, for all children and for each sex separately. The results identified specific aspects of behaviour disorder significantly related to low birth weight (LBW) for children at the age of 10 but not at the age of 13. When the sexes were separated, there were no relations between birth weight and deviant behaviour for boys of low birth weight as compared to boys of normal birth weight, while girls of low birth weight showed specific behavioural disorders at age 10 as compared to girls of normal birth weight. For girls reared in families of low parental socioeconomic status, aggressiveness and motor restlessness at age 10 but not at age 13 was also present. Further analyses showed that girls born small-for-gestational age showed lack of school motivation and concentration difficulties both at age 10 and age 13.

Adolescent↗
PubMed1989

The role of early aggressive behavior in the frequency, seriousness, and types of later crime.

This study reports on the relation between aggressive behavior at early school age and later delinquent activities of 1,027 subjects (517 boys and 510 girls) prospectively followed from late childhood to adulthood. The research group was a fairly unbiased age sample of children, covering most of the range of social and psychological upbringing conditions for 10-year-old children in a Swedish community. Aggressiveness was measured by teacher ratings at ages 10 and 13 years. Delinquency, defined as registered lawbreaking, was covered through age 26. There was a strong connection between both the aggressiveness ratings at ages 10 and 13 and adult delinquency for boys, with the majority of delinquents and recidivists being recruited from the early-aggressive boys. High ratings of aggressiveness were characteristic of boys who later committed violent crimes and damage to public property and generally of subjects with a diversified offense pattern. Aggressiveness was not predictive of later crime for girls until they reached the age of 13. For both sexes the relation between aggressiveness and crime was to a large extent independent of intelligence and family education. The possibility of making individual prognoses and the role of aggressiveness for the sexes are discussed.

Adolescent↗
PubMed1989

Coping behaviors in relation to frequency and intensity of anxiety-provoking situations.

The relationships between coping strategies (constructive, passive, and escape), on the one hand, and anxiety reactions and individuals' frequency of experiences of anxiety, and situations' rate of recurrence, and general anxiety-inducing effect on the other, were explored. The investigated factors and their associations were studied both as individual characteristics and situational properties. Data for boys and girls were treated separately. The results for individuals showed that both trait-anxiety and frequency of stressful experience were related positively to escape strategies and negatively to constructive solutions. For situations, general situational effect correlated positively with escape solutions and negatively with constructivity. Rate of recurrence was correlated positively with constructive strategies and negatively with escape solutions. No significant sex differences were found.

Adaptation, Psychological↗
PubMed1988

Drinking habits and alcohol abuse among young men: a prospective longitudinal study.

The relationship between self-reported frequency of drunkenness at 14-16 years of age and registered alcohol abuse at age 15-25 was studied in a large and representative group of Swedish men. The results showed that the proportion of boys who had experienced drunkenness more than 10 times increased rapidly between ages 14-16. Before the age of 25, 17% of the boys were registered in governmental records (police, social authorities or psychiatric services) because of alcohol abuse. A high frequency of self-reported drunkenness at age 14-16 was found to be significantly related to registered alcohol abuse at age 18-24. At the same time, however, it was found that 70-80% of the adolescent boys with the greatest frequency of drunkenness were not registered for alcohol abuse in early adult years. Using self-reported frequency of drunkenness at age 14-16 as a basis for predicting registered alcohol abuse at age 18-24 allowed correct classification of only 6% more boys than would have been expected by using a random procedure. The present study indicated that initial drinking habits per se are of limited importance in the development of alcohol abuse in early adulthood. However, the results showed that the combination of high self-reported frequency of drunkenness and appearance in government registers as early as age 15-17 constitutes a serious indication of continuing alcohol abuse.

Adolescent↗
PubMed1987

Psychiatric care and course of psychiatric disorders from childhood to early adulthood in a representative sample.

The incidence and prevalence of registered and psychiatric disorders were studied from birth to 24 years of age in a total population. The cumulative incidence of psychiatric disorders (meeting DSM III criteria) below 25 years was 13.9% for boys and 14.2% for girls. The outcomes of psychiatric disorders during childhood were generally good. Only 11% of children with an onset before age 10 remained in psychiatric care as young adults. Psychiatric disorders were more common among boys who had attended special classes. Low intelligence was related to psychiatric disorders with an onset before 15 years of age in males, but after 15 in females.

Adolescent↗
PubMed1984

Influence of sex, blood group, secretor character, smoking habits, acetylsalicylic acid, oral contraceptives, fasting and general health state on blood coagulation variables in randomly selected young adults.

Blood samples were drawn from 129 randomly selected young adults. Intake of acetylsalicylic acid (ASA), contraceptive drugs, smoking habits and health state were registered. Males had significantly higher systolic blood pressure, shorter bleeding time and lower VIII:C. Smoking was only correlated to some variables assessed in the female group. Users of oral contraceptives smoked more, had a shorter bleeding time and higher fibrinogen levels. Factor VIIIR;Ag was elevated only in female smokers with blood group non-O. Non-secretors had shorter bleeding times and a tendency towards higher VIIIR:Ag.

Adult↗
PubMed1979

Overachievement and catecholamine excretion in an achievement-demanding situation.

We have studied the relationship between overachievement (defined as high school achievement in relation to intelligence) and catecholamine output (adrenaline and noradrenaline). The subjects were 176 children aged 13 yr. Adrenaline and noradrenaline excretions were measured in (1) a neutral situation (attending a nonexciting film), and (2) in an achievement-demanding situation. In the achievement-demanding situation, overachieving boys had much higher adrenaline excretion levels than the other boys. This difference was not found for girls. For boys, overachievement in combination with overambition (as rated by teachers) was related to a higher output of both adrenaline and noradrenaline in an achievement-demanding situation.

Achievement↗
PubMed1978

Co-frequency ratings of anxiety reactions.

The method of direct co-frequency rating was explored for the study of relationships among individuals' self-reported anxiety reactions. The subjects were 40 adolescents who gave co-frequency ratings (how often the reactions co-occurred) for all pairs of 10 preselected reactions to anxiety. The mean co-frequency matrix was subjected to multidimensional scaling and cluster analysis. The same subjects also rated the intensity of the same reactions in an anxiety inventory of the "S-R" type. The correlations among reactions were computed and compared with corresponding co-frequency estimates. The relationship between these two types of data was relatively high. Factor analysis of the correlations gave a "Psychic" and a "Somatic" reaction factor, whereas the main dimension obtained from co-frequency ratings reflected a general reaction factor. This outcome was supported by the cluster analyses, which yielded two and one clusters, respectively, interpretable in accordance with the dimension analyses.

Adolescent↗