RESUMO
A composite retrospective radiographic analysis of 71 patients who had undergone the Keller arthroplasty and 76 who had undergone the Keller with hemi-implant was performed. The combined mean preoperative intermetatarsal angle was 11.4 degrees, the mean postoperative intermetatarsal angle was 9.4 degrees, and the mean change in intermetatarsal angle was 2.0 degrees. Although the reduction of the metatarsus primus adductus deformity obtained was less than previous studies, the amount of correction was directly proportional to the magnitude of deformity. The authors conclude that through reverse buckling at the first metatarsophalangeal joint, adequate reduction in the positional component of metatarsus primus adductus can be obtained with the Keller arthroplasty alone or with a hemi-implant. These procedures are preferred over metatarsal osteotomies in the physiologically older patient, especially when a severe metatarsus primus adductus deformity exists.
Assuntos
Artroplastia/métodos , Deformidades Adquiridas do Pé/cirurgia , Articulação do Dedo do Pé/cirurgia , Antropometria , Feminino , Deformidades Adquiridas do Pé/diagnóstico por imagem , Humanos , Artropatias/diagnóstico por imagem , Artropatias/cirurgia , Masculino , Articulação Metatarsofalângica/diagnóstico por imagem , Articulação Metatarsofalângica/cirurgia , Radiografia , Estudos Retrospectivos , Articulação do Dedo do Pé/diagnóstico por imagem , Resultado do TratamentoRESUMO
Chemically generated CO(2) laser pulses at 10.6 microm have been used to clear a 5-cm diameter hole through a stratus-like cloud in a laboratory cloud chamber. The results show that 100% clearing can be achieved. The mechanism is shown to be droplet shattering followed by evaporation. In the experimental conditions, the channel closure is effected by turbulent mixing and droplet recondensation.
