Ole Rahbek

Summary

Publications

  1. ncbi request reprint Light microscopic identification and semiquantification of polyethylene particles in methylmethacrylate and paraffin-embedded experimental bone implant specimens
    O Rahbek
    Orthopedic Research Laboratory, Aarhus University Hospital, Denmark
    J Microsc 218:225-32. 2005
  2. ncbi request reprint Superior sealing effect of hydroxyapatite in porous-coated implants: experimental studies on the migration of polyethylene particles around stable and unstable implants in dogs
    Ole Rahbek
    Orthopedic Research Laboratory, Department of Orthopedics, Skejby Hospital, Denmark
    Acta Orthop 76:375-85. 2005
  3. ncbi request reprint The influence of surface porosity on gap-healing around intra-articular implants in the presence of migrating particles
    Ole Rahbek
    Orthopedic Research Laboratory, Aarhus University Hospital, Nørrebrogade 44, Building 1A, DK 8000 Aarhus C, Denmark
    Biomaterials 26:4728-36. 2005
  4. ncbi request reprint No effect of hydroxyapatite particles in phagocytosable sizes on implant fixation: an experimental study in dogs
    O Rahbek
    Orthopedic Research Laboratory, Aarhus University Hospital, Norrebrogade 44, Building 1A, DK 8000, Aarhus C, Denmark
    J Biomed Mater Res A 73:150-7. 2005
  5. pmc Inferior survival of hydroxyapatite versus titanium-coated cups at 15 years
    Maiken Stilling
    Department of Orthopaedics, Aarhus University Hospital, Tage Hansens Gade 2, Building 10A, 8000, Aarhus C, Denmark
    Clin Orthop Relat Res 467:2872-9. 2009
  6. ncbi request reprint No adverse effects of bone compaction on implant fixation after resorption of compacted bone in dogs
    Søren Kold
    Orthopaedic Research Laboratory, Department of Orthopaedics, Aarhus University Hospital, Denmark
    Acta Orthop 76:912-9. 2005
  7. pmc Analysis of polyethylene wear in plain radiographs
    Maiken Stilling
    Department of Orthopaedics, Aarhus University Hospital, Holstebro, Denmark
    Acta Orthop 80:675-82. 2009
  8. ncbi request reprint Bone compaction enhances fixation of weight-bearing hydroxyapatite-coated implants
    Søren Kold
    Orthopaedic Research Laboratory, Department of Orthopaedics, Aarhus University Hospital, Aarhus, Denmark
    J Arthroplasty 21:263-70. 2006
  9. doi request reprint Superior 11-year survival but higher polyethylene wear of hydroxyapatite-coated Mallory-Head cups
    Martin Gottliebsen
    Department of Orthopaedics, Aarhus University Hospital, Aarhus, Denmark
    Hip Int 22:35-40. 2012
  10. ncbi request reprint Bone compaction enhances implant fixation in a canine gap model
    Søren Kold
    Orthopaedic Research Laboratory, Department of Orthopaedics, Aarhus University Hospital, Nørrebrogade 44, Building 1A, DK 8000 Aarhus, Denmark
    J Orthop Res 23:824-30. 2005

Collaborators

Detail Information

Publications30

  1. ncbi request reprint Light microscopic identification and semiquantification of polyethylene particles in methylmethacrylate and paraffin-embedded experimental bone implant specimens
    O Rahbek
    Orthopedic Research Laboratory, Aarhus University Hospital, Denmark
    J Microsc 218:225-32. 2005
    ..MMA sections do not allow analysis at cellular level, but unbiased estimation of bone ingrowth into the implant surface based on stereological principles is possible...
  2. ncbi request reprint Superior sealing effect of hydroxyapatite in porous-coated implants: experimental studies on the migration of polyethylene particles around stable and unstable implants in dogs
    Ole Rahbek
    Orthopedic Research Laboratory, Department of Orthopedics, Skejby Hospital, Denmark
    Acta Orthop 76:375-85. 2005
    ..We investigated whether HA could augment the sealing effect of a porous coating under both stable and unstable conditions...
  3. ncbi request reprint The influence of surface porosity on gap-healing around intra-articular implants in the presence of migrating particles
    Ole Rahbek
    Orthopedic Research Laboratory, Aarhus University Hospital, Nørrebrogade 44, Building 1A, DK 8000 Aarhus C, Denmark
    Biomaterials 26:4728-36. 2005
    ..A sealing effect against the migration of PE particles was found for both Fi and Pl implants in exact fit...
  4. ncbi request reprint No effect of hydroxyapatite particles in phagocytosable sizes on implant fixation: an experimental study in dogs
    O Rahbek
    Orthopedic Research Laboratory, Aarhus University Hospital, Norrebrogade 44, Building 1A, DK 8000, Aarhus C, Denmark
    J Biomed Mater Res A 73:150-7. 2005
    ..HA particles were also integrated in newly formed bone. We found no negative effect of the particulate material on mechanical fixation of the implants or on bone formation around the implants...
  5. pmc Inferior survival of hydroxyapatite versus titanium-coated cups at 15 years
    Maiken Stilling
    Department of Orthopaedics, Aarhus University Hospital, Tage Hansens Gade 2, Building 10A, 8000, Aarhus C, Denmark
    Clin Orthop Relat Res 467:2872-9. 2009
    ..These findings apply to first-generation modular cups and may not apply to other cup designs and new HA-coating technologies...
  6. ncbi request reprint No adverse effects of bone compaction on implant fixation after resorption of compacted bone in dogs
    Søren Kold
    Orthopaedic Research Laboratory, Department of Orthopaedics, Aarhus University Hospital, Denmark
    Acta Orthop 76:912-9. 2005
    ..Also, compaction may result in inferior long-term implant fixation as the compacted non-vital bone at the bone-implant interface is resorbed...
  7. pmc Analysis of polyethylene wear in plain radiographs
    Maiken Stilling
    Department of Orthopaedics, Aarhus University Hospital, Holstebro, Denmark
    Acta Orthop 80:675-82. 2009
    ..We compared the repeatability and concurrent validity of linear PE wear on plain radiographs using the same software but a different number of radiographs...
  8. ncbi request reprint Bone compaction enhances fixation of weight-bearing hydroxyapatite-coated implants
    Søren Kold
    Orthopaedic Research Laboratory, Department of Orthopaedics, Aarhus University Hospital, Aarhus, Denmark
    J Arthroplasty 21:263-70. 2006
    ..The results of this study suggest that compaction may be beneficial in optimizing the crucial initial implant stability, even when hydroxyapatite-coated implants with osteoconductive properties are inserted in vivo...
  9. doi request reprint Superior 11-year survival but higher polyethylene wear of hydroxyapatite-coated Mallory-Head cups
    Martin Gottliebsen
    Department of Orthopaedics, Aarhus University Hospital, Aarhus, Denmark
    Hip Int 22:35-40. 2012
    ..After 11.1 years of follow-up non-HA coated cups had a higher revision rate. Increased PE wear with HA-coated cups did not have a negative influence on the revision rate, but may result in a need for revision surgery over time...
  10. ncbi request reprint Bone compaction enhances implant fixation in a canine gap model
    Søren Kold
    Orthopaedic Research Laboratory, Department of Orthopaedics, Aarhus University Hospital, Nørrebrogade 44, Building 1A, DK 8000 Aarhus, Denmark
    J Orthop Res 23:824-30. 2005
    ..The faster mechanical and histological fixation with compaction indicates that the beneficial effect of reduced gap size, as compacted bone springs back, is not eliminated by an impaired gap-healing of compacted bone...
  11. ncbi request reprint Bone compaction enhances fixation of hydroxyapatite-coated implants in a canine gap model
    Søren Kold
    Orthopaedic Research Laboratory, Department of Orthopaedics, Aarhus University Hospital, Nørrebrogade 44, Building 1A, DK 8000 Aarhus C, Denmark
    J Biomed Mater Res B Appl Biomater 75:49-55. 2005
    ..The results of this study suggest that compaction may enhance gap healing when osteo-conductive HA porous coated implants are inserted in joint replacements...
  12. pmc The final follow-up plain radiograph is sufficient for clinical evaluation of polyethylene wear in total hip arthroplasty. A study of validity and reliability
    Maiken Stilling
    Department of Orthopedics, Aarhus University Hospital, Denmark
    Acta Orthop 81:570-8. 2010
    ..We evaluated the agreement between PE wear measured with PolyWare software, which uses plain radiographs, and by model-based RSA, which uses stereo radiographs...
  13. pmc Superior fixation of pegged trabecular metal over screw-fixed pegged porous titanium fiber mesh: a randomized clinical RSA study on cementless tibial components
    Maiken Stilling
    Department of Orthopedics, School of Public Health, Aarhus University, Aarhus, Denmark
    Acta Orthop 82:177-86. 2011
    ..We hypothesized that there would be improved fixation of high-porosity trabecular metal (TM) tibial components compared to low-porosity titanium pegged porous fiber-metal (Ti) polyethylene metal backings...
  14. pmc Hemiepiphysiodesis: similar treatment time for tension-band plating and for stapling: a randomized clinical trial on guided growth for idiopathic genu valgum
    Martin Gottliebsen
    Department of Children s Orthopaedics, Aarhus University Hospital, Aarhus, Denmark
    Acta Orthop 84:202-6. 2013
    ..The benefit of the tension-band plating technique has not yet been proven in experimental or randomized clinical studies...
  15. pmc Knee flexion influences periprosthetic BMD measurement in the tibia. Suggestions for a reproducible clinical scan protocol
    Maiken Stilling
    Department of Orthopaedics, Aarhus University Hospital, Denmark
    Acta Orthop 81:463-70. 2010
    ..We investigated the sensitivity of bone mineral density (BMD) measurements to knee flexion in a phantom study and in patients. We suggest a protocol for clinical use...
  16. pmc Clinical comparison of polyethylene wear with zirconia or cobalt-chromium femoral heads
    Maiken Stilling
    Department of Orthopaedics, Aarhus University Hospital, Tage Hansens Gade 2, Aarhus C, Aarhus, Denmark
    Clin Orthop Relat Res 467:2644-50. 2009
    ..The explanation for the clinical similarity of wear, despite the theoretical advantages of ceramic heads, needs further investigation...
  17. ncbi request reprint Bone compaction enhances fixation of weightbearing titanium implants
    Søren Kold
    Orthopaedic Research Laboratory, Department of Orthopaedics, Aarhus University Hospital, Nørrebrogade 44, Bldg, 1a, DK 8000 Aarhus C, Denmark
    Clin Orthop Relat Res . 2005
    ..This biphasic response indicates that compaction enhances implant fixation by mechanical and biological mechanisms. Therefore, compaction might have potential value in total joint replacement in the future...
  18. ncbi request reprint Osteogenic protein 1 device increases bone formation and bone graft resorption around cementless implants
    Thomas B Jensen
    Department of Orthopaedics, Aarhus University Hospital, Denmark
    Acta Orthop Scand 73:31-9. 2002
    ..Our findings do not support the use of ProOsteon alone around cementless implants...
  19. ncbi request reprint Compacted cancellous bone has a spring-back effect
    Søren Kold
    Orthopaedic Research Laboratory, Department of Orthopaedics, Aarhus University Hospital, Denmark
    Acta Orthop Scand 74:591-5. 2003
    ..Thus we found a spring-back effect of compacted bone, which may be important for increasing implant fixation by reducing initial gaps between the implant and bone...
  20. pmc Guided growth: mechanism and reversibility of modulation
    Martin Gottliebsen
    Department of Children s Orthopaedics, Aarhus University Hospital, Aarhus, Denmark
    J Child Orthop 10:471-477. 2016
    ..The diverging screws in these implants are probably mainly useful for hemiepiphysiodesis. We also discuss new minimally invasive techniques that may become important in future clinical practice...
  21. doi request reprint Similar growth plate morphology in stapling and tension band plating hemiepiphysiodesis: a porcine experimental histomorphometric study
    Martin Gottliebsen
    Department of Children s Orthopaedics, Aarhus University Hospital, Nørrebrogade 44, Aarhus C 8000, Denmark
    J Orthop Res 31:574-9. 2013
    ..The growth plate responded to release of hemiepiphysiodesis with abundant disorganized cartilage tissue in both groups. The histological response to hemiepiphysiodesis by tension band plating and staples appear to be similar...
  22. ncbi request reprint Sealing effect of hydroxyapatite coating on peri-implant migration of particles. An experimental study in dogs
    O Rahbek
    Orthopaedic Research Group, Aarhus University Hospital, Denmark
    J Bone Joint Surg Br 83:441-7. 2001
    ..Our findings suggest that HA coating of implants is able to inhibit peri-implant migration of PE particles by creating a seal of tightly-bonded bone on the surface of the implant...
  23. pmc No effect of platelet-rich plasma with frozen or processed bone allograft around noncemented implants
    T B Jensen
    Orthopaedic Research Group, Aarhus University Hospital, Aarhus, Denmark
    Int Orthop 29:67-72. 2005
    ..Even though the level of platelet in PRP was 7.7 times that found in whole blood, we found no improvement of bone formation or implant fixation by adding PRP...
  24. ncbi request reprint Sealing effect of hydroxyapatite coating: a 12-month study in canines
    O Rahbek
    Department of Orthopaedics, Aarhus University Hospital, Denmark
    Acta Orthop Scand 71:563-73. 2000
    ..More PE particles were found around Ti implants than with HA implants (p < 0.002). Specimens from iliac lymph nodes, liver, spleen and lung were examined and showed dissemination of PE particles only in regional lymph nodes...
  25. doi request reprint Postural seated balance in children can be assessed with good reliability
    Line Kjeldgaard Pedersen
    Department of Children s Orthopedics, Aarhus University Hospital, Nørrebrogade 44, 8000 Aarhus C, Denmark Electronic address
    Gait Posture 47:68-73. 2016
    ..No reliability testing or biologic variation assessment has been documented regarding seated balance. This study determines the reliability of the parameters of seated balance in healthy children using the Tekscan CONFORMat equipment...
  26. doi request reprint Accuracy of MR in growth plate measurement
    Juan Manuel Shiguetomi-Medina
    Orthopaedic Research Laboratory, Aarhus University Hospital NBG, Aarhus University, Noerrebrogade 44 building 1A, 8000, Aarhus C, Denmark
    Skeletal Radiol 43:1263-9. 2014
    ..To analyze the accuracy of growth-plate thickness measurements detected on 1.5-T and 7-T MR images using histology sections as a standard of reference...
  27. pmc Long-term outcome after ulnar osteotomy for missed Monteggia fracture dislocation in children
    Ole Rahbek
    Department of Children s Orthopaedics, Aarhus University Hospital NBG, Nørrebrogade 44, 8000 Aarhus C, Denmark
    J Child Orthop 5:449-57. 2011
    ..We present a series of patients treated with open reduction and ulnar osteotomy with a mean long-term follow-up of 8 years (range 3-17)...
  28. doi request reprint Effect of nicotine and tobacco administration method on the mechanical properties of healing bone following closed fracture
    Sidsel Gaarn Hastrup
    Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, Aarhus University Hospital, Norrebrogade 44, Building 1A, 8000 Aarhus C, Denmark
    J Orthop Res 28:1235-9. 2010
    ..Caution should be exercised when comparing results of fracture healing studies using different methods of nicotine administration...
  29. pmc Particle migration and gap healing around trabecular metal implants
    O Rahbek
    Orthopedic Research Laboratory, Aarhus University Hospital, Nørrebrogade 44, Building 1A, 8000, Aarhus, Denmark
    Int Orthop 29:368-74. 2005
    ..7% [p=0.02], peri-implant gap: 13% vs. 0% [p=0.02]. The number of peri-implant polyethylene particles was significantly reduced around the trabecular metal implants with a peri-implant gap compared with solid implants...
  30. ncbi request reprint Platelet rich plasma and fresh frozen bone allograft as enhancement of implant fixation. An experimental study in dogs
    T B Jensen
    Orthopaedic Research Group, Institute of Experimental Clinical Research, Aarhus University Hospital, Aarhus Kommunehospital, 8000 Aarhus C, Denmark
    J Orthop Res 22:653-8. 2004
    ..More studies are needed to investigate the effect and possible clinical applications of platelet concentrates which are now being commercialised...