BACKGROUND: Hamstring lengthening commonly is performed for the treatment of flexed knee gait in patients with spastic diplegic cerebral palsy. Satisfactory short-term results after hamstring lengthening have been demonstrated in various studies. However, evidence for the effectiveness of hamstring lengthening to correct flexed knee gait is scant because of small and inhomogeneous case series, different surgical techniques, and short follow-up. METHODS: The long-term results for thirty-nine patients with spastic diplegia and flexed knee gait who were managed with intramuscular hamstring lengthening as a part of multilevel surgery are presented. Standardized three-dimensional gait analyses and clinical examinations were performed for all patients preoperatively and at one, three, and six to twelve years postoperatively. RESULTS: Significant improvements in kinematic parameters and the popliteal angle were noted at short-term follow-up (p < 0.01), supporting the results of previous studies. Long-term results showed significant deterioration of minimum knee flexion in stance and the popliteal angle (p < 0.01), whereas the improvements in the Gross Motor Function Classification System and Gillette Gait Index were maintained. This recurrence of flexed knee gait is partial and measurable. Increased pelvic tilt was found in 49% of the limbs postoperatively, which may represent one factor leading to recurrence of flexed knee gait. Genu recurvatum was seen in eighteen patients (twenty-seven limbs; 35%) one year postoperatively, especially in the patients with a jump knee gait pattern preoperatively. At long-term follow-up, genu recurvatum resolved in many limbs, but 12% of the limbs showed residual genu recurvatum, indicating that overcorrection represents a problem following hamstring lengthening. CONCLUSIONS: The results of the present study are crucial for the prognosis of knee function after hamstring lengthening as a part of multilevel surgery. Recurrence and possible overcorrection should be considered in treatment planning.
BACKGROUND: Hamstring lengthening commonly is performed for the treatment of flexed knee gait in patients with spastic diplegic cerebral palsy. Satisfactory short-term results after hamstring lengthening have been demonstrated in various studies. However, evidence for the effectiveness of hamstring lengthening to correct flexed knee gait is scant because of small and inhomogeneous case series, different surgical techniques, and short follow-up. METHODS: The long-term results for thirty-nine patients with spastic diplegia and flexed knee gait who were managed with intramuscular hamstring lengthening as a part of multilevel surgery are presented. Standardized three-dimensional gait analyses and clinical examinations were performed for all patients preoperatively and at one, three, and six to twelve years postoperatively. RESULTS: Significant improvements in kinematic parameters and the popliteal angle were noted at short-term follow-up (p < 0.01), supporting the results of previous studies. Long-term results showed significant deterioration of minimum knee flexion in stance and the popliteal angle (p < 0.01), whereas the improvements in the Gross Motor Function Classification System and Gillette Gait Index were maintained. This recurrence of flexed knee gait is partial and measurable. Increased pelvic tilt was found in 49% of the limbs postoperatively, which may represent one factor leading to recurrence of flexed knee gait. Genu recurvatum was seen in eighteen patients (twenty-seven limbs; 35%) one year postoperatively, especially in the patients with a jump knee gait pattern preoperatively. At long-term follow-up, genu recurvatum resolved in many limbs, but 12% of the limbs showed residual genu recurvatum, indicating that overcorrection represents a problem following hamstring lengthening. CONCLUSIONS: The results of the present study are crucial for the prognosis of knee function after hamstring lengthening as a part of multilevel surgery. Recurrence and possible overcorrection should be considered in treatment planning.
Authors: Melisa Osborne; Nicole M Mueske; Susan A Rethlefsen; Robert M Kay; Tishya A L Wren Journal: Gait Posture Date: 2018-11-28 Impact factor: 2.840
Authors: Matthias C M Klotz; Klemens Hirsch; Daniel Heitzmann; Michael W Maier; Sebastien Hagmann; Thomas Dreher Journal: World J Pediatr Date: 2016-12-23 Impact factor: 2.764
Authors: Dóra Végvári; Sebastian I Wolf; Daniel Heitzmann; Matthias C M Klotz; Thomas Dreher Journal: Clin Orthop Relat Res Date: 2013-06-05 Impact factor: 4.176
Authors: Helga Haberfehlner; Richard T Jaspers; Erich Rutz; Jules G Becher; Jaap Harlaar; Johannes A van der Sluijs; Melinda M Witbreuk; Jacqueline Romkes; Marie Freslier; Reinald Brunner; Huub Maas; Annemieke I Buizer Journal: PLoS One Date: 2016-11-18 Impact factor: 3.240
Authors: Helga Haberfehlner; Richard T Jaspers; Erich Rutz; Jaap Harlaar; Johannes A van der Sluijs; Melinda M Witbreuk; Kim van Hutten; Jacqueline Romkes; Marie Freslier; Reinald Brunner; Jules G Becher; Huub Maas; Annemieke I Buizer Journal: PLoS One Date: 2018-02-06 Impact factor: 3.240