RESUMO
Eight fresh-frozen cadaver knees were studied to evaluate whether an isometrically placed posterior cruciate ligament (PCL) graft restores normal posterior tibial translation without overconstraining anterior tibial translation. Each knee was tested with a three-axis load cell in the intact state, after PCL sectioning, and after PCL reconstruction. After PCL reconstruction, posterior tibial displacement was restored to values observed in the intact state for all flexion angles except 60 degrees and 90 degrees. Anterior tibial translation was not significantly changed for any of the three states. These results indicate isometric reconstruction of the PCL significantly reduces posterior tibial translation without overconstraining anterior tibial translation.
Assuntos
Procedimentos Ortopédicos/métodos , Ligamento Cruzado Posterior/cirurgia , Adulto , Idoso , Fenômenos Biomecânicos , Cadáver , Humanos , Articulação do Joelho/anatomia & histologia , Articulação do Joelho/fisiologia , Articulação do Joelho/cirurgia , Pessoa de Meia-Idade , Procedimentos de Cirurgia Plástica/métodos , Tendões/transplanteRESUMO
Examination of blood groups, plasma proteins and red cell enzyme types (23 loci), in a sample of 145 Bhils, a tribal group of Madhya Pradesh, Central India, demonstrates their genetic uniqueness. They differ in a number of systems from the nearby nontribal groups both of Hindus and Muslims. The results suggest that the Bhil frequencies include vestiges of the ancestral genepool of a more widespread aboriginal population whose influence is detectable in the gene frequencies of some other populations in India.
Assuntos
Antígenos de Grupos Sanguíneos , Proteínas Sanguíneas/genética , Frequência do Gene , Deficiência de Glucosefosfato Desidrogenase/genética , Havaiano Nativo ou Outro Ilhéu do Pacífico , Adenosina Desaminase/genética , Adenilato Quinase/genética , Sistema do Grupo Sanguíneo Duffy , Eritrócitos/enzimologia , Esterases/genética , Hemoglobinas Anormais/genética , Humanos , Índia , Sistema do Grupo Sanguíneo de KellRESUMO
The dermatoglyphic configurations of 78 children with acute rheumatic fever were compared with those of 46 first-degree relatives and 1,310 normal subjects. Of the children with acute rheumatic fever, 75% had an ulnar deviation of the axial triradius. In about 40% of this group, the ulnar deviation was associated with a concomitant distal displacement, which resulted in a significantly higher mean maximal angle atd (P less than .001) and significantly lower mean ab and td ridge counts (P less than .001) relative to normal control values. The palmar dermatoglyphics of patients with acute rheumatic fever were more closely related to the configurations of first-degree relatives than to normal controls. The dermatoglyphic profiles of six patients were nearly identical to those of their first-degree relatives, all of whom had a history of acute rheumatic fever. Presence of abnormal dermatoglyphic profiles in a large proportion of children with acute rheumatic fever supports the hypothesis that certain individuals have a genetic predisposition to this disease.
