Studying the effect of medial open wedge high tibial osteotomy on the posterior slope of tibia among patients with Genu varum
Seyyed Raza Sharifzadeh, Mostafa Shahrezaee, Mohammad Ali Okhovatpour, Mohammad Banasiri
Abstract
Background
A slight change in the posterior slope of tibia results in complications such as limited movement of knee joint and higher risks of Osteoarthritis.
Aims
The present research seeks to study levels of tibia’s posterior slope change and limited movement of knee joint and knee stability following medial open wedge osteotomy used to treat patients with genu varum.
Methods
The present research is a clinical trial conducted in the form of a before and after study on patients with genu varum resorting to Imam Reza (PBUH), Khanevade, and Fajr hospitals from 2009 to 2012. As many as 40 knees (32 patients) were studied and the posterior slope of tibia before and after medial open wedge high tibial osteotomy was measured by someone totally unaware of the research using true lateral radiography. Movement limitation and stability of the knee was measured before and after the operation using scope of motion and Lachman and Drawer test. Paired sample test was used in this research and SPSS was used to analyse the data.
Results
The average posterior slope of tibia before the operation was 9.912, while this value changed to 11.625 after the operation signifying a significant increase. In terms of limited knee joint movement, 7 patients were diagnosed with grade 5 Extension LAG after operation, while the remaining 33 patients had a normal motion range (Extension LAG=0).
Conclusion
Medial open wedge osteotomy above tibia can help increase the posterior slope of tibia.
Full Text:
A slight change in the posterior slope of tibia results in complications such as limited movement of knee joint and higher risks of Osteoarthritis.
Aims
The present research seeks to study levels of tibia’s posterior slope change and limited movement of knee joint and knee stability following medial open wedge osteotomy used to treat patients with genu varum.
Methods
The present research is a clinical trial conducted in the form of a before and after study on patients with genu varum resorting to Imam Reza (PBUH), Khanevade, and Fajr hospitals from 2009 to 2012. As many as 40 knees (32 patients) were studied and the posterior slope of tibia before and after medial open wedge high tibial osteotomy was measured by someone totally unaware of the research using true lateral radiography. Movement limitation and stability of the knee was measured before and after the operation using scope of motion and Lachman and Drawer test. Paired sample test was used in this research and SPSS was used to analyse the data.
Results
The average posterior slope of tibia before the operation was 9.912, while this value changed to 11.625 after the operation signifying a significant increase. In terms of limited knee joint movement, 7 patients were diagnosed with grade 5 Extension LAG after operation, while the remaining 33 patients had a normal motion range (Extension LAG=0).
Conclusion
Medial open wedge osteotomy above tibia can help increase the posterior slope of tibia.
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