A Retrospective Comparison of Union Rates After Open Wedge High Tibial Osteotomies With and Without Synthetic Bone Grafts (Hydroxyapatite and β-tricalciumphosphate) at 2 Years

Kyung Wook Nha, Seung Min Oh, Yoon Won Ha, Vivek P. Nikumbha, Jung Hwan Seo, Myung Jae Oh, Chae Ouk Lim, Jae Gyoon Kim

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Purpose: To evaluate the clinical and radiological results of no bone graft (NBG) after opening wedge high tibial osteotomy (OWHTO) with a locking plate and to compare the bone union rate between the synthetic bone graft (SBG) group and the NBG group after OWHTO using serial radiographs. Methods: From 2012 to 2015, OWHTOs were performed with SBG or without bone graft using long locking plates. Inclusion criteria were: (1) OWHTO for disease of the medial compartment with varus deformity, and (2) minimum 2-year follow-up and radiographs taken serially to 2 years. Exclusion criteria were: (1) follow-up period <2 years (n = 8) or (2) absence of at least 1 radiograph taken at each follow-up point (n = 14). We retrospectively reviewed radiographs taken preoperatively and at 6 weeks, 3 months, 6 months, 1 year, and 2 years postoperatively. Groups comprised those filled with a synthetic bone [hydroxyapatite (HA) and β-tricalciumphosphate (TCP), n=33, SBG group] or without a bone graft (n = 38, NBG group). We compared bone union rate between the 2 groups by measuring the union zone from zone 1 to zone 5 in serial radiographs using Fisher's exact test. Results: OWHTO was performed in a total of 93 knees and 71 knees were included in this study. Both groups showed good clinical and radiological results without correction loss at 2 years. The entire NBG group and 93.9% of the SBG group showed union over zone 3 at 2 years. However, the NBG group showed significantly more incorporation than the SBG group at 6 months (P =.006), 1 year (P =.0003), and 2 years (P =.0003). Conclusions: Union without correction loss was obtained after OWHTO without bone graft. The NBG group showed significantly more incorporation than the SBG group (HA and β-TCP) within 2 years. Level of Evidence: Level IV, case series.

Original languageEnglish
Pages (from-to)2621-2630
Number of pages10
JournalArthroscopy - Journal of Arthroscopic and Related Surgery
Volume34
Issue number9
DOIs
Publication statusPublished - 2018 Sep 1

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

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