Patella height is not altered by descending medial open-wedge high tibial osteotomy (HTO) compared to ascending HTO
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Patella height is not altered by descending medial open-wedge high tibial osteotomy (HTO) compared to ascending HTO. / Krause, Matthias; Drenck, Tobias Claus; Korthaus, Alexander; Preiss, Achim; Frosch, Karl-Heinz; Akoto, Ralph.
In: KNEE SURG SPORT TR A, Vol. 26, No. 6, 06.2018, p. 1859-1866.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - Patella height is not altered by descending medial open-wedge high tibial osteotomy (HTO) compared to ascending HTO
AU - Krause, Matthias
AU - Drenck, Tobias Claus
AU - Korthaus, Alexander
AU - Preiss, Achim
AU - Frosch, Karl-Heinz
AU - Akoto, Ralph
PY - 2018/6
Y1 - 2018/6
N2 - PURPOSE: The primary purpose of the study was to gain insight into geometric changes of the patellar height (PH) and posterior tibial slope (PTS) after a biplanar ascending medial open-wedge high tibial osteotomy (HTO) compared to biplanar descending medial open-wedge HTO in patients with genu varum.METHODS: Sixty-four patients (mean age 45.2 ± 8.7 years, females n = 24, males n = 40) with varus malalignment and medial gonarthrosis were retrospectively studied. Patients received either a biplanar ascending or descending medial open-wedge HTO. Radiographic analysis included the assessment of standing total leg axis, PH, and PTS prior to and after surgery.RESULTS: In the ascending HTO group, PH decreased significantly by 4.0% (p = 0.037, Caton-Deschamps index) after an average leg axis valgus-producing correction of 7.1° ± 2.8°. In the descending HTO group, with an average leg axis correction of 7.0° ± 3.7°, there were no significant PH changes. There were no significant differences between the ascending and descending HTO groups regarding PTS or leg axis. The mean post-operative leg axis between ascending (1.6° ± 1.9°) and descending HTO (1.9° ± 2.4°) was not significantly different.CONCLUSION: Compared to the biplanar ascending medial open-wedge HTO, the descending HTO did not influence patella height or increase the posterior tibial slope. In order to respect patellofemoral and slope-related knee kinematics, a biplanar descending medial open-wedge HTO has proven useful to control patella height and posterior tibial slope. These findings underscore the importance of the preoperative patella height assessment in the osteotomy planning and subsequent choice of the biplanar osteotomy direction.LEVEL OF EVIDENCE: IV.
AB - PURPOSE: The primary purpose of the study was to gain insight into geometric changes of the patellar height (PH) and posterior tibial slope (PTS) after a biplanar ascending medial open-wedge high tibial osteotomy (HTO) compared to biplanar descending medial open-wedge HTO in patients with genu varum.METHODS: Sixty-four patients (mean age 45.2 ± 8.7 years, females n = 24, males n = 40) with varus malalignment and medial gonarthrosis were retrospectively studied. Patients received either a biplanar ascending or descending medial open-wedge HTO. Radiographic analysis included the assessment of standing total leg axis, PH, and PTS prior to and after surgery.RESULTS: In the ascending HTO group, PH decreased significantly by 4.0% (p = 0.037, Caton-Deschamps index) after an average leg axis valgus-producing correction of 7.1° ± 2.8°. In the descending HTO group, with an average leg axis correction of 7.0° ± 3.7°, there were no significant PH changes. There were no significant differences between the ascending and descending HTO groups regarding PTS or leg axis. The mean post-operative leg axis between ascending (1.6° ± 1.9°) and descending HTO (1.9° ± 2.4°) was not significantly different.CONCLUSION: Compared to the biplanar ascending medial open-wedge HTO, the descending HTO did not influence patella height or increase the posterior tibial slope. In order to respect patellofemoral and slope-related knee kinematics, a biplanar descending medial open-wedge HTO has proven useful to control patella height and posterior tibial slope. These findings underscore the importance of the preoperative patella height assessment in the osteotomy planning and subsequent choice of the biplanar osteotomy direction.LEVEL OF EVIDENCE: IV.
KW - Journal Article
U2 - 10.1007/s00167-017-4548-0
DO - 10.1007/s00167-017-4548-0
M3 - SCORING: Journal article
C2 - 28417183
VL - 26
SP - 1859
EP - 1866
JO - KNEE SURG SPORT TR A
JF - KNEE SURG SPORT TR A
SN - 0942-2056
IS - 6
ER -