Fixation Stability and Stiffness of Two Implant Systems for Proximal Femoral Varization Osteotomy
Source abstract
Abstract
Proximal femoral varization osteotomy is a well-established surgical procedure in children with severe hip problems. This study aimed to evaluate the fixation stability and stiffness of two new implant systems. A biomechanical testing model was created with a total of 12 synthetic femora. Proximal femoral varization osteotomy was performed in every femur, and the synthetic femora were fixed with two different implant systems (PediLoc Locking Proximal Femur Plate System versus PediLoc Locking Cannulated Blade Plate System; OrthoPediatrics, Warsaw, IN, USA). The average torsional stiffness of the locking plate group was higher than for the cannulated blade plate group. Differences in internal and external rotations were seen between the two groups, but they were not significant. Using the tested implants in severe osteoporotic bones might show other results. Therefore, it might be helpful to use the locking plate system in osteoporotic bones and in cases of revision operations where stability is of critical focus.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Orthopaedic implants and arthroplasty · Hip disorders and treatments · Hip and Femur Fractures
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Orthopaedic Surgery, Hannover Medical School, Anna-von-Borries Straße 1-7, 30625 Hannover, Germany
Laboratory for Biomechanics and Biomaterials, Department of Orthopaedic Surgery, Hannover Medical School, Anna-von-Borries Straße 1-7, 30625 Hannover, Germany
Funding
OrthoPediatrics (now NuVasive Germany GmbH, Bremen, Germany) · German Research Foundation (DFG) and the Open Access Publication Fund of Hannover Medical School (MHH)
References (16)
Show source-provided references
1. Long-term management results of Pemberton’s ilium osteotomy in combination with inter-trochanter derotation-varisation osteotomy in hip dysplasia of childhood10.1055/s-2003-41562 ↗
2. The pediatric LCP hip plate for fixation of proximal femoral osteotomy in cerebral palsy and severe osteoporosis10.1097/BPO.0b013e3181efb86b ↗
3. Varus derotational osteotomy of the femur in cerebral palsy
4. Cannulated, locking blade plates for proximal femoral osteotomy in children and adolescents10.1007/s11832-015-0649-9 ↗
5. Proximal femoral osteotomy using the AO fixed-angle blade plate10.1097/01241398-199211000-00007 ↗
6. Which implant for proximal femoral osteotomy in children? A comparison of the AO (ASIF) 90° fixed-angle blade plate and the Richards intermediate hip screw10.1097/01241398-200005000-00013 ↗
7. Tension band wiring for proximal femoral varus osteotomy fixation in children10.1097/MD.0000000000000061 ↗
8. Coventry screw fixation of osteotomies about the pediatric hip10.1097/01241398-198311000-00006 ↗
9. Cannulated blade plate for proximal femoral varus osteotomy10.1097/00003086-199010000-00016 ↗
10. Structural properties of a new design of composite replicate femurs and tibia10.1016/S0021-9290(01)00015-X ↗
11. Implant-related fractures in children with proximal femoral osteotomy: Blade plate versus screw-side plate construct10.1097/BPO.0000000000000481 ↗
12. Proximal femoral osteotomy in children with cerebral palsy: The perspective of the trainee10.1302/1863-2548-11-160226 ↗
13. Mechanical evaluation of large-size fourth-generation composite femur and tibia models10.1007/s10439-009-9887-7 ↗
14. Femoroplasty-augmentation of the proximal femur with a composite bone cement-feasibility, biomechanical properties and osteosynthesis potential10.1016/j.medengphy.2006.08.006 ↗
15. Assessment of the strength of proximal femur in vitro: Relationship to femoral bone mineral density and femoral geometry10.1016/S8756-3282(96)00383-3 ↗
16. Biomechanical comparison of two pediatric blade plate designs in proximal femoral osteotomies10.1007/s11420-019-09675-1 ↗