J Korean Orthop Assoc.  2015 Oct;50(5):424-428. 10.4055/jkoa.2015.50.5.424.

Interference of Union after the Use of Beta-Tricalcium Phosphate Block in High Tibial Osteotomy

  • 1Department of Orthopedic Surgery, Bumin General Hospital, Busan, Korea. osjjs49@gmail.com


High tibial osteotomy (HTO) is a commonly used treatment for genu varum and medial compartment osteoarthritis. Recently open wedge HTO has been the preferred method due to its facilitated technique, fewer neurovascular and joint injuries, etc. In open wedge HTO materials such as autogenous, allogenous bone graft and tricalcium phosphate (TCP) are used to help with bone union and have a role in filling in the empty space. However the authors of this study report on two cases of nonunion 1 year after HTO using TCP block.


high tibial osteotomy; tricalcium phosphate; nonunion

MeSH Terms

Genu Varum


  • Figure 1 Open wedge high tibial osteotomy performed using a 13 mm tricalcium phospate block with locking plate.

  • Figure 2 Nonunion around the edges of the tricalcium phospate block after 1 year was shown in a simple radiograph.

  • Figure 3 An intraoperative image of the nonunion shown in the wedge space.

  • Figure 4 An anteroposterior radiograph at 3 months after implant removal was checked and the well maintained space was observed.

  • Figure 5 An anteroposterior radiograph at 3 months after implant removal was checked and the well maintained space was observed.

  • Figure 6 An anteroposterior radiograph before implant removal was performed.

  • Figure 7 At 3 months after implant removal, a standing anteroposterior radiograph also showed a radiolucent space and well maintained angle.


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