Braatz, Frank

[["dc.bibliographiccitation.firstpage","1357"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Research in Developmental Disabilities"],["dc.bibliographiccitation.lastpage","1363"],["dc.bibliographiccitation.volume","35"],["dc.contributor.author","Klotz, Matthias C."],["dc.contributor.author","Wolf, Sebastian I."],["dc.contributor.author","Heitzmann, Daniel"],["dc.contributor.author","Maier, Michael W."],["dc.contributor.author","Braatz, Frank"],["dc.contributor.author","Dreher, Thomas"],["dc.date.accessioned","2018-11-07T09:39:50Z"],["dc.date.available","2018-11-07T09:39:50Z"],["dc.date.issued","2014"],["dc.description.abstract","Primary genu recurvatum (GR) is less investigated and data presenting the prevalence among patients with bilateral spastic cerebral palsy (BSCP) is lacking in the literature. Equinus is mentioned as one of the main underlying factors in GR, but its influence on the severity and onset type of GR is mainly unanswered, yet. Hence, the purpose of this retrospective study was to assess the prevalence of GR in a large sample size in children with BSCP and to investigate sagittal plane kinematics to evaluate the influence of equinus on different GR types using data of three-dimensional gait analysis. GR was defined as a knee hyperextension of more than one standard deviation of an age matched control group during stance phase in either one or both of the limbs. Primary GR was defined as a GR without having previous surgery regarding the lower extremity, no selective dorsal rhizotomy and/or interventions like botulinum toxin injection, shock wave therapy or serial casting during the last 6 months in the patient history. In a retrospective study 463 patients with BSCP (GMFCS Level I-III) received three-dimensional gait analysis and were scanned for the presence of primary GR. Finally, 37 patients (23 males, 14 females) matched the determined inclusion criteria and were therefore included for further analysis in this study. Out of those patients seven walked with orthoses or a walker and were excluded from further statistical comparison: Kinematics of the lower limbs were compared between patients having severe (knee hyperextension > 15 degrees) and moderate (knee hyperextension 5-15 degrees) GR and between patients showing an early (first half of stance phase) and a late (second half of stance phase) GR. Primary GR was present in 37 patients/52 limbs (prevalence 8.0/5.6%). Severe GR was associated with a decreased ankle dorsiflexion compared with moderate GR. Early GR showed an increased knee hyperextension compared to late GR. In conclusion GR is less frequent compared with crouch or stiff gait. Our findings support the importance of equinus as a major underlying factor in primary GR. In this context the influence of equinus seems to be more important in early GR. (C) 2014 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.ridd.2014.03.032"],["dc.identifier.isi","000335635100018"],["dc.identifier.pmid","24705489"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/33382"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","0891-4222"],["dc.title","The association of equinus and primary genu recurvatum gait in cerebral palsy"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2193"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","International Orthopaedics"],["dc.bibliographiccitation.lastpage","2198"],["dc.bibliographiccitation.volume","37"],["dc.contributor.author","Braatz, Frank"],["dc.contributor.author","Wolf, Sebastian I."],["dc.contributor.author","Gerber, Annette"],["dc.contributor.author","Klotz, Matthias C."],["dc.contributor.author","Dreher, Thomas"],["dc.date.accessioned","2018-11-07T09:18:13Z"],["dc.date.available","2018-11-07T09:18:13Z"],["dc.date.issued","2013"],["dc.description.abstract","Purpose Femoral derotation osteotomy (FDO) is commonly used to correct internal rotation gait (IRG) in spastic diplegia. The purpose of this study was to investigate whether the extent of intraoperative derotation is reflected in changes in static (clinical ROM and anteversion angle measured on torsional MRI) and dynamic parameters (transverse plane kinematics in three-dimensional gait analysis) after FDO in children with spastic diplegia. Methods In a prospective study, 30 children with spastic diplegia and IRG were treated with FDO as part of a multilevel surgery and were examined pre- and postoperatively clinically, by three-dimensional gait analysis and by torsional MRI according to a standardised protocol. Results A correlation (r = 0.317, p = 0.015) between the extent of intraoperative derotation and mean hip rotation in stance as well as the anteversion angle measured on torsional MRI (r = 0.454, p < 0.001) was found. However, no significant correlation was observed between anteversion angle (tMRI) and mean hip rotation in stance, either before or after FDO. Conclusions Significant improvements were found in IRG after FDO, confirming the results of previous studies. There was no correlation between the anteversion measured on MRI and the mean hip rotation in stance in 3D gait analysis before or after FDO. Thus, the data suggest that if the intraoperative extent of derotation is determined only by the anteversion angle, the result will not be better after FDO. It might only help to avoid retroversion and indicate the maximum amount of femoral derotation. In this study the extent of the intraoperative derotation was orientated at the preoperative midpoint of rotation. Based on the small, but significant correlation between the clinical midpoint and the mean hip rotation in stance in the gait analysis, determination of the intraoperative extent of derotation according to the mean hip rotation in stance seems to give the best results."],["dc.identifier.doi","10.1007/s00264-013-2054-7"],["dc.identifier.isi","000326104400013"],["dc.identifier.pmid","23955818"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/28355"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","1432-5195"],["dc.relation.issn","0341-2695"],["dc.title","Do changes in torsional magnetic resonance imaging reflect improvement in gait after femoral derotation osteotomy in patients with cerebral palsy?"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1663"],["dc.bibliographiccitation.issue","8"],["dc.bibliographiccitation.journal","International Orthopaedics"],["dc.bibliographiccitation.lastpage","1668"],["dc.bibliographiccitation.volume","40"],["dc.contributor.author","Braatz, Frank"],["dc.contributor.author","Staude, Daniel"],["dc.contributor.author","Klotz, Matthias C."],["dc.contributor.author","Wolf, Sebastian I."],["dc.contributor.author","Dreher, Thomas"],["dc.contributor.author","Lakemeier, Stefan"],["dc.date.accessioned","2018-11-07T10:11:07Z"],["dc.date.available","2018-11-07T10:11:07Z"],["dc.date.issued","2016"],["dc.description.abstract","Introduction Neurogenic hip dislocation is quite common in children with cerebral palsy (CP). The purpose of this study was to evaluate the long-term outcome of single-event multilevel surgery (SEMLS) in combination with hip reconstruction by using a periacetabular osteotomy as described by Dega concerning post-operative remodeling and plasticity of the femoral head post-operatively. Methods A total of 72 patients with CP as the primary disease and in whom a complex surgical hip reconstruction was performed during SEMLS between 1998 and 2004 were included in the study. There were 45 men and 27 women, with a median age of 7.6 (4.7-16.3) years at the time SEMLS was performed. The mean follow-up time was 7.7 years (4.9-11.8). X-rays were taken before and after surgery, and Rippstein 1 and 2 were used for follow-up. As the most reliable value for decentration, migration percentage (MP) as described by Reimers was used. To measure hip-joint cover at follow-up, the centre-edge angle was used. The hip was divided into four different categories according to sphericity and congruity. Using this approach, we could evaluate joint remodeling. Results Pre-operatively, the mean MP measured by X-ray was 68 %. Directly after surgery, this value decreased on average by 12 % and at the long-term follow-up was 16.0 % on average. A high rate of incongruence was observed on X-rays taken directly after surgery: 66 hip joints were classified as incongruent. The number of aspherical and incongruent joints decreased to 54 at the follow-up examination. Conclusion Data of our study with high plasticity of the hip joint suggest that even if the femoral head is deformed and a persistent incongruency after surgery is expected, hip reconstruction can be recommended."],["dc.identifier.doi","10.1007/s00264-015-3013-2"],["dc.identifier.isi","000380690500015"],["dc.identifier.pmid","26454662"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/39985"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","1432-5195"],["dc.relation.issn","0341-2695"],["dc.title","Hip-joint congruity after Dega osteotomy in patients with cerebral palsy: long-term results"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","215"],["dc.bibliographiccitation.journal","Gait & Posture"],["dc.bibliographiccitation.lastpage","219"],["dc.bibliographiccitation.volume","61"],["dc.contributor.author","Braatz, Frank"],["dc.contributor.author","Dreher, Thomas"],["dc.contributor.author","Wolf, Sebastian I."],["dc.contributor.author","Niklasch, Mirjam"],["dc.date.accessioned","2020-12-10T14:24:12Z"],["dc.date.available","2020-12-10T14:24:12Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1016/j.gaitpost.2018.01.017"],["dc.identifier.issn","0966-6362"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/72183"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Preoperative hip rotation moments do not predict long-term development after femoral derotation osteotomy in children with cerebral palsy"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2237"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","International Orthopaedics"],["dc.bibliographiccitation.lastpage","2243"],["dc.bibliographiccitation.volume","38"],["dc.contributor.author","Braatz, Frank"],["dc.contributor.author","Eidemueller, Annette"],["dc.contributor.author","Klotz, Matthias C."],["dc.contributor.author","Beckmann, Nicholas A."],["dc.contributor.author","Wolf, Sebastian I."],["dc.contributor.author","Dreher, Thomas"],["dc.date.accessioned","2018-11-07T09:33:08Z"],["dc.date.available","2018-11-07T09:33:08Z"],["dc.date.issued","2014"],["dc.description.abstract","Purpose Neurogenic hip dislocation is frequently observed in patients with cerebral palsy (CP). If the hip is not centred but not dislocated, the hip joint can be recentered with minor operative effort. Reconstructive procedures are indicated if the femoral head is subluxated or dislocated. There are no data as to when destruction of the femoral head requires a salvage procedure or whether hip reconstruction surgery is successful in restoring joint congruity in patients with CP. Our aim was to investigate femoral head plasticity after hip reconstruction surgery in a long-term outcome study. Methods We studied a large cohort of patients with CP and high hip dislocation (Tonnis grade IV) before surgery. Sixty-eight patients were assessed, of whom 23 presented with bilateral high hip dislocation, and 91 complex hip reconstructions were conducted. Standardised radiographic examination was performed before and directly after surgery and at the long-term follow-up examination. Results Pain was the most frequent reason for complex hip-joint reconstruction (49 patients, 72%). An impressive improvement in pain was demonstrated postoperatively. Forty-five hip joints presented aspheric incongruity postoperatively, which improved on average 7.7 years after surgery and 59 hip joints showed congruency. Only 15% of patients experienced pain at the time of final follow-up, and that was of low intensity. Conclusions Early conservative treatment for hip dislocation is helpful, and operative reconstruction should also be scheduled early. Continued surveillance is necessary, and Reimers index is useful for monitoring the development of hip centering. In case of hip pain and femoral head deformity, our long-term study indicates that hip reconstruction surgery as a part of multilevel surgery improves pain and function in patients with CP and Tonnis IV hip dislocation, even if the hip joint is incongruent after operation. This incongruity improves over the long-term. If possible, a reconstruction procedure should be performed before the femoral head becomes deformed. High plasticity of the hip joint suggest that even if the femoral head is deformed, hip reconstruction can be recommended."],["dc.identifier.doi","10.1007/s00264-014-2379-x"],["dc.identifier.isi","000344345300002"],["dc.identifier.pmid","24968787"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31900"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","1432-5195"],["dc.relation.issn","0341-2695"],["dc.title","Hip reconstruction surgery is successful in restoring joint congruity in patients with cerebral palsy: long-term outcome"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]