Medial UKA tends to increase patellar height, whereas open-wedge HTO tends to decrease patellar height

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Published Sep 25, 2020
DOI: https://doi.org/10.18103/mra.v8i9.2223

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Main Article Content

Mo Saffarini, MEng, MBA, FRMS
ReSurg S.A., Rue Saint-Jean 22, 1260 Nyon, Switzerland
Philippe Alves
Hôpital de la Tour, Meyrin, Switzerland
Julien Billieres
Hôpital de la Tour, Meyrin, Switzerland
Robin Martin
Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland

Abstract

Background: There is no consensus on the most appropriate method to assess patellar height following medial unicompartmental arthroplasty (UKA) or open-wedge high tibial osteotomy (HTO). The purpose of this study was to evaluate the difference between pre- and post-operative patellar height in patients receiving UKA or HTO using three indices of patellar height.


Methods: The authors retrospectively analysed pre- and post-operative radiographs of 44 patients that received medial UKA (n=21) or open-wedge HTO (n=23). Pre- and post-operative radiographs were standardised between patients, including anterior-posterior, and lateral in 30° flexion images. Postoperative radiographs were obtained at 6 weeks. Patellar height was assessed according to the Insall-Salvati index, Blackburne-Peel index, and Caton-Deschamps index.


Results: Patients that received UKA (67.4±5.8 years) were significantly older than patients that received HTO (51.3±9.0 years, p<0.001). Preoperative patellar height was similar between patients that received UKA or HTO according to all three indices. Postoperative patellar height was similar among the two groups according to the Insall-Salvati index, but was significantly greater following UKA according to the Blackburne-Peel index (0.95±0.13 vs. 0.75±0.24, p=0.003) and Caton-Deschamps index (1.09±0.17 vs. 0.93±0.26, p=0.019). According to all three indices, UKA tended to increase patellar height, whereas HTO tended to decrease patellar height. The differences between pre- and post-operative patellar heights were however not significant, except for the Caton-Deschamps index following UKA (p=0.043).


Conclusion: According to all three indices, medial UKA tended to increase patellar height, whereas open-wedge HTO tended to decrease patellar height.  

Keywords: Medial UKA, open-wedge HTO, patellar height, Insall-Salvati index, Blackburne-Peel index

Article Details

How to Cite
SAFFARINI, Mo et al. Medial UKA tends to increase patellar height, whereas open-wedge HTO tends to decrease patellar height. Medical Research Archives, [S.l.], v. 8, n. 9, sep. 2020. ISSN 2375-1924. Available at: <https://esmed.org/MRA/mra/article/view/2223>. Date accessed: 22 dec. 2024. doi: https://doi.org/10.18103/mra.v8i9.2223.
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Vol 8 No 9 (2020): Vol.8 Issue 9, September, 2020
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Articles

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