dr. R.J.B. Sakkers

dr. R.J.B. Sakkers

Assistant Professor - medical
dr. R.J.B. Sakkers



Ralph Sakkers is a pediatric orthopedic sureon at the UMCUtrecht and holds the following position:

  • International Hip Dysplasia Institute (IHDI) physician
  • Coordinator ERN expertise center for rare diseases ORPHA 666 (osteogenesis imperfecta) and ORPHA 364559 (non-syndromic reduction defects)
  • Coordinator NFU expertise center for ORPHA 93457 (skeletal dysplasia) and ORPHA 666 (osteogenesis imperfecta), and ORPHA 364526 (dysostosis) and ORPHA 364559 (non-syndromic reduction defects)
  • PI Regenerative Medicine UMCUtrecht
  • Member Medical Advisory Board Osteogenesis Imperfecta Federation Europe (OIFE) 
  • Member Scientific Advisory Board Anna Fonds 
  • Member EPOS Study Group Genetics and Metabolic Diseases 
  • Member EPOS Study Group Lower Limb
  • Member Educational Committee EPOS
  • Orthopedic Consultant Dutch Skeletal Dysplasia Group
  • Orthopedic Consultant Rehabilitation Center ”de Hoogstraat”, Utrecht
  • Member Editorial Board Journal of Childrens Orthopaedics
  • Member Editorial Board JPO-B


He received the Ehrenmedaille of the Vereinigung fur Kinderorthopadie Deutschland.


Ralph Sakkers is a minority shareholder in U-Planner BV and Replasia BV

Research Output (115)

Active monitoring versus an abduction device for treatment of infants with centered dysplastic hips:study protocol for a randomized controlled trial (TReatment with Active Monitoring (TRAM)-Trial)

Mulder Frederike E.C.M., Witlox M. Adhiambo, Dirksen Carmen D., de Witte Pieter Bas, de Vos-Jakobs Suzanne, Ham Arno M.ten, Witbreuk Melinda M.E.H., Sakkers Ralph, Drongelen Magritha (Margret) M.H.P.Foreman van, Robben Simon G.F., van Bergen Christiaan J.A., Besselaar Arnold T., Boot Marieke, Burger Bart J., van Douveren Florens Q.M.P., van Gelder J. H.(Harjanneke), Hartog Yvon M.den, Oost Iris Koenraadt van, van Linge Joost H., Maathuis Patrick G.M., Moerman Sophie, Pereboom Renske M., Staal Heleen M., van der Steen M. C.(Marieke), Tolk Jaap J., Vergroesen Diederik A., Zeegers A. (Elgun) V.C.M., Mathijssen Nina M.C., Dec 2023, In: BMC Pediatrics. 23

Life span care for patients with skeletal dysplasia:A roadmap

Nijhuis Wouter H., Verhoef Marjolein, Sakkers Ralph J.B. Nov 2023, In: European Journal of Medical Genetics. 66 , p. 1-5 5 p.

Automatic Assessment of Lower-Limb Alignment from Computed Tomography

Kuiper Ruurd J A, Seevinck Peter R, Viergever Max A, Weinans Harrie, Sakkers Ralph J B 3 May 2023, In: The Journal of bone and joint surgery. American volume. 105 , p. 700-712 13 p.

Acetabular rim extension using a personalized titanium implant for treatment of hip dysplasia in dogs:short-term results

Kwananocha Irin, Magré Joëll, Willemsen Koen, Weinans Harrie, Sakkers Ralph J.B., How Thijs, Verseijden Femke, Tryfonidou Marianna A., van der Wal Bart C.H., Meij Björn P. 20 Apr 2023, In: Frontiers in veterinary science. 10 , p. 1-12 12 p.

From Genetics to Clinical Implications:A Study of 675 Dutch Osteogenesis Imperfecta Patients

Storoni Silvia, Verdonk Sara J.E., Zhytnik Lidiia, Pals Gerard, Treurniet Sanne, Elting Mariet W., Sakkers Ralph J.B., van den Aardweg Joost G., Eekhoff Elisabeth M.W., Micha Dimitra Feb 2023, In: Biomolecules. 13 , p. 1-15 15 p.

Impact of bone and cartilage segmentation from CT and MRI on both bone forearm osteotomy planning

Kuiper Ruurd J A, Colaris Joost W, Stockmans Filip, van Es Eline M, Viergever Max A, Seevinck Peter R, Weinans Harrie, Sakkers Ralph J B 2023, In: International Journal of Computer Assisted Radiology and Surgery. 18 , p. 2307-2318 12 p.

Visual Inspection for Lower Limb Malalignment Diagnosis Is Unreliable

Nguyen H. Chien, van Egmond Nienke, de Visser Huub M., Weinans Harrie, Sakkers Ralph J.B., Custers Roel J.H. Dec 2022, In: Cartilage. 13 , p. 59-65 7 p.

Editorial:Innovative Therapies in Bone Biology: What Can Be Learned From Rare Bone Diseases?

Eekhoff Elisabeth M.W., de Vries Teun J., Sakkers Ralph J.B., Van Hul Wim 9 Jun 2022, In: Frontiers in Endocrinology. 13 , p. 1-3 3 p.

Statistical Shape Modeling of US Images to Predict Hip Dysplasia Development in Infants

Bonsel Joshua M., Gielis Willem Paul, Pollet Virginie, Weinans Harrie H., Sakkers Ralph J.B. May 2022, In: Radiology. 303 , p. 425-432 8 p.

Patient-specific 3D-printed shelf implant for the treatment of hip dysplasia tested in an experimental animal pilot in canines

Willemsen Koen, Tryfonidou Marianna A., Sakkers Ralph J.B., Castelein René M., Beukers Martijn, Seevinck Peter R., Weinans Harrie, van der Wal Bart C.H., Meij Björn P. 22 Feb 2022, In: Scientific Reports. 12

All research output

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