MODIFIED SALTER PELVIC OSTEOTOMY FOR THE DDH TREATMENT.

Objectives: Three pelvic osteotomies (Salter, Dega, Pemberton) are widely used in walking patients under seven years old for DDH treatment. We've proposed a modified Salter Pelvic Osteotomy (SPO), which has the advantages of the abovementioned osteotomies. Methods: Short- and mid-term results were assessed in 19 patients after the modified SPO application. Patients were examined before and after the surgery, at 6 months postoperatively, and at follow-up. Results: Acetabular Index (AI) before the surgery was 39.5 ± 7 °; after the surgery - 24.4 ± 5.5 °, at 6 months - 20.4 ± 5 ° (9-28), at follow-up - 14.5 ± 4 °; AI correction - 14.9 ± 5.5 °. Lateral Centre-Edge Angle at follow-up - 22.7 ± 4.7 °. Clinical results at follow-up were I / II McKay grade in 18 patients (94.7%); radiological results were I / II Severin class in 18 patients (94.7%). Conclusion: Modified SPO improves the FH coverage in any direction; results after modified SPO are excellent and good in most patients. Level of Evidence IV; Case Series .

Objetivos: Três osteotomias pélvicas (Salter, Dega, Pemberton) são am-plamente utilizadas em pacientes ambulatoriais com menos de sete anos de idade para tratamento com DDH. Foi proposta a Osteotomia Pélvica de Salter modificada (SPO), que apresenta as vantagens das osteotomias acima mencionadas. Métodos: Os resultados de curto e médio prazo foram avaliados em 19 pacientes após a aplicação da SPO modificada. Os pacientes foram examinados antes e após a cirurgia, aos 6 meses de pós-operatório, e no acompanhamento. Resultados: O Índice Acetabular (IA) antes da cirurgia foi de 39,5 ± 7°; após a cirurgia - 24,4± 5,5°, aos 6 meses - 20,4 ± 5° (9-28), no acompanhamento - 14,5 ± 4°; correção da IA - 14,9 ± 5,5°. Ângulo Lateral do Centro-Edge Angle no acompanhamento - 22,7 ± 4,7 °. Os resultados clínicos no acompanhamento foram I / II grau McKay em 18 pacientes (94,7%); os resultados radiológicos foram I / II classe Severin em 18 pacientes (94,7%). Conclusão: A SPO modificada melhora a cobertura de FH em todos os sentidos; os resultados após a SPO modificada são excelentes e bons na maioria dos pacientes. Nível de Evidência IV; Série de casos.

Modified salter pelvic osteotomy for the ddh treatment / Osteotomia pélvica de salter modificada para tratamento de ddh

ABSTRACT Objectives: Three pelvic osteotomies (Salter, Dega, Pemberton) are widely used in walking patients under seven years old for DDH treatment. We've proposed a modified Salter Pelvic Osteotomy (SPO), which has the advantages of the abovementioned osteotomies. Methods: Short- and mid-term results were assessed in 19 patients after the modified SPO application. Patients were examined before and after the surgery, at 6 months postoperatively, and at follow-up. Results: Acetabular Index (AI) before the surgery was 39.5 ± 7 °; after the surgery - 24.4 ± 5.5 °, at 6 months - 20.4 ± 5 ° (9-28), at follow-up - 14.5 ± 4 °; AI correction - 14.9 ± 5.5 °. Lateral Centre-Edge Angle at follow-up - 22.7 ± 4.7 °. Clinical results at follow-up were I / II McKay grade in 18 patients (94.7%); radiological results were I / II Severin class in 18 patients (94.7%). Conclusion: Modified SPO improves the FH coverage in any direction; results after modified SPO are excellent and good in most patients. Level of Evidence IV; Case Series.

RESUMO Objetivos: Três osteotomias pélvicas (Salter, Dega, Pemberton) são am-plamente utilizadas em pacientes ambulatoriais com menos de sete anos de idade para tratamento com DDH. Foi proposta a Osteotomia Pélvica de Salter modificada (SPO), que apresenta as vantagens das osteotomias acima mencionadas. Métodos: Os resultados de curto e médio prazo foram avaliados em 19 pacientes após a aplicação da SPO modificada. Os pacientes foram examinados antes e após a cirurgia, aos 6 meses de pós-operatório, e no acompanhamento. Resultados: O Índice Acetabular (IA) antes da cirurgia foi de 39,5 ± 7°; após a cirurgia - 24,4± 5,5°, aos 6 meses - 20,4 ± 5° (9-28), no acompanhamento - 14,5 ± 4°; correção da IA - 14,9 ± 5,5°. Ângulo Lateral do Centro-Edge Angle no acompanhamento - 22,7 ± 4,7 °. Os resultados clínicos no acompanhamento foram I / II grau McKay em 18 pacientes (94,7%); os resultados radiológicos foram I / II classe Severin em 18 pacientes (94,7%). Conclusão: A SPO modificada melhora a cobertura de FH em todos os sentidos; os resultados após a SPO modificada são excelentes e bons na maioria dos pacientes. Nível de Evidência IV; Série de casos.

Femoral Head Coverage Assessment in Healthy Children Younger than 6 Years.

Introduction: Developmental dysplasia of the hip (DDH) is one of the commonest hip joint pathologies in children; to treat it properly, hip surgeons should know the normal femoral head (FH) coverage by the acetabulum. This paper aims to assess the femoral head coverage in healthy children younger than 6 years. Methods: 270 hip joint CT scans were selected, and digital pelvic models were created according to these scans. FH coverage by the five acetabular regions was assessed according to patient's age and sex. Results: Normal reference values of FH coverage by different acetabular regions were obtained. It was found that the growth process of different acetabular regions occurs nonlinearly with the periods of acceleration. Anterior and superior-anterior acetabular regions grow more intensively in boys up to 3 years old and between 4 and 5 years old both in boys and girls; superior-posterior, posterior-superior, and posterior-inferior acetabular regions grow more intensively in boys and girls up to 3 years old and between 4 and 5 years old (p ≤ 0.005). The following sex differences in FH coverage by the acetabulum were found: more superior-anterior FH coverage was found in boys and posterior FH coverage in girls (p ≤ 0.005).