Objective: To analyze statistically results in biomechanical testing of fixation of femoral neck Pauwels type III fractures, on synthetic bone, with dynamic condylar screw (DCS) and control group. Methods: Ten synthetic bones of a national brand were used. Test Group: fixation was performed after osteotomy at 70o tilt using DCS plate with four holes. We analyzed the resistance of this fixation with 5 mm displacement and rotational deviation (Step 1) and with10 mm (Step 2). Control group: the models were tested in their integrity until the femoral neck fracture occurred. Results: The values of the test group in Step 1 showed a mean of 974N and SD = 114N. In Stage 2, we obtained on average 1335N and SD = 98N. The values in the control group were: 1544N, 1110N, 1359N, 1194N, 1437N, respectively. Statistical analysis using the Mann-Whitney test for comparison of the maximum force (N) between the test group and the control, in Step 2, demonstrated that there is no significant difference between the DCS and control plates (p = 0.91). Conclusion: There is no significant difference between the DCS boards and the control group exposed to full resistance. Level of Evidence III, Case Control.
Resumo
Objetivo Avaliar clinicamente os resultados de pacientes submetidos a tratamento cirúrgico artroscópico de instabilidade anterior do ombro.
Métodos Estudo retrospectivo de 94 pacientes. Com seguimento mínimo de 24 meses, buscamos correlacionar as características dos pacientes e da cirurgia, como idade, gênero, tipo de lesão (traumática ou atraumática) e posição do paciente na cirurgia (decúbito lateral e cadeira de praia) com os resultados obtidos, avaliando o índice de recidivas de luxação, a perda de rotação lateral, a dor residual, e os escores funcionais de Carter-Rowe, da University of California at Los Angeles (UCLA) e de Constant-Murley.
Resultados Observamos uma taxa de recidiva de luxação de 11,7%, perda de rotação lateral em 37,23% dos pacientes, e algum grau de dor residual em 51,6%. Obtivemos uma pontuação média no escore de Carter Rowe de 85,37, representando 86% de resultados bons/excelentes. No escore da UCLA, obtivemos 88% de resultados bons/excelentes, índice semelhante aos encontrados no escore de Constant-Murley (86%).
Conclusão O tratamento artroscópico da instabilidade anterior do ombro apresenta resultados satisfatórios e baixo índice de complicações importantes, podendo ser o método de escolha para a maioria dos pacientes.
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