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T Parvinen

Publications and source records attributed to T Parvinen.

8 recordsLinked to original sources
PubMed1989

[Gold restorations].

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Dental Restoration, Permanent↗
PubMed1989

Sports-related injuries in children.

Within a 3-year period, from 1980 to 1982, 1124 sports injuries of children aged 6-15 years were treated in the Turku University Central Hospital casualty department. Two-thirds (69%) of the injuries were sustained by boys. Sports injuries represented 21% of the diagnoses related to accidents in this age group. Half of the sports accidents occurred during the 4 winter months. Boys were injured most commonly in ice hockey (36%) and football (20%) and girls in skating (18%) and riding (18%). One quarter (26%) of the injuries were located in the head and neck, 36% in the upper extremities, 33% in the lower limbs, and 4% in the trunk. The most common types of injuries were fractures (26%), sprains and strains (24%), contusions (22%) and wounds (17%). The proportional occurrence of fractures increased with age in boys (P less than 0.001) and decreased in girls (P less than 0.001), luxations (P less than 0.05) and sprains (P less than 0.001) increased with age in girls; skull injuries (P less than 0.01) and contusions and wounds (P less than 0.001) decreased in boys. Girls had more sprains (P less than 0.001) but fewer contusions and wounds (P less than 0.001). Most of the injuries were mild; 9% of the cases were hospitalized. Minor surgery was performed in 16% and reconstructive surgery in 2% of all injuries. About 70% of the injuries occurred in nonorganized sports.

Adolescent↗
PubMed1986

The origin of 45,X males.

Maleness in association with the karyotype 45,X is a very rare and hitherto unexplained condition previously described in only four or five patients. This study was carried out to determine whether such males might actually possess Y-chromosomal material. Of the two 45,X males studied, one was found to be a low-grade mosaic with a 46,XY karyotype in less than 3% of fibroblasts; all lymphocytes karyotyped were 45,X. Fibroblast DNA from this individual was found to contain Y-specific repeated sequences in 1%-3% the amount observed in the father, consistent with mosaicism for a 46,XY cell line. No Y-specific repeated sequences were detected in the other patient, in whom all mitoses were 45,X. In neither patient were there detectable amounts of any of the single-copy Y-specific DNA sequences for which we tested. Studies of Xg blood groups and of X-linked restriction fragment length polymorphisms indicated that the single X chromosome was of maternal origin in both 45,X male probands. In contrast to the situation in XX males, we can exclude paternal X-Y interchange as the etiology in the cases described here. Our findings are compatible with mosaicism being the explanation of at least some "45,X" males.

DNA Restriction Enzymes↗