Asymmetry of mediolateral laxity of the normal knee

Okazaki, Ken; Miura, Hiromasa; Matsuda, Shuichi; Takeuchi, Naohide; Mawatari, Taro; Hashizume, Makoto; Iwamoto, Yukihide

doi:10.1007/s00776-006-1009-x

Cited by 135 publications

(95 citation statements)

References 9 publications

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“…Sekiya et al [23] suggested that postoperative lateral ligamentous laxity diminished with time, reporting that 8.6°of lateral laxity at extension diminished to 5.1°3 months after TKA. We think it is unnecessary to release ligaments too much on the medial side to be the same length with the loose lateral side and accept a slight intraoperative lateral laxity as long as a neutral coronal alignment can be achieved after implantation [6,19,21]. When taking into account the resected bone, we found the lateral soft tissue was more lax but the medial soft tissue was not shorter with greater varus deformity.…”

Section: Discussionmentioning

confidence: 80%

Lateral Soft Tissue Laxity Increases but Medial Laxity Does Not Contract With Varus Deformity in Total Knee Arthroplasty

Okamoto

Okazaki

Mitsuyasu

et al. 2013

Clinical Orthopaedics &Amp; Related Research

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Section: Discussionmentioning

confidence: 80%

Lateral Soft Tissue Laxity Increases but Medial Laxity Does Not Contract With Varus Deformity in Total Knee Arthroplasty

Okamoto

Okazaki

Mitsuyasu

et al. 2013

Clinical Orthopaedics &Amp; Related Research

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“…Also, even in normal knees, lateral ligamentous laxity and medial ligamentous laxity are not balanced. More lateral ligamentous laxity than medial ligamentous laxity has been observed [18,23].…”

Section: Introductionmentioning

confidence: 99%

Postoperative Lateral Ligamentous Laxity Diminishes with Time After TKA in the Varus Knee

Sekiya

Takatoku

Takada

et al. 2008

Clin Orthop Relat Res

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For successful TKA, good soft tissue balance is one of the most important factors; however, it is unknown whether the coronal balance immediately after surgery is maintained with time. We hypothesized, if neutral mechanical alignment was achieved at the time of TKA, some degree of lateral ligamentous laxity could be accepted and the laxity would diminish with time. To confirm this hypothesis, we posed two scientific questions: (1) Does the coronal ligament balance measured immediately after TKA change with time? (2) Does the degree of preoperative varus alignment correlate with the lateral or medial ligamentous laxity observed after TKA? We measured coronal lateral or medial ligamentous laxity in 71 knees with varus deformities immediately after surgery and at 3, 6, and 12 months thereafter. The mean mechanical axis was 15.9°varus preoperatively and 0.4°varus postoperatively. The mean medial ligamentous laxity was relatively constant postoperatively from immediately after surgery to 12 months. However, the mean lateral ligamentous laxity was as much as 8.6°immediately after surgery and decreased to 5.1°at 3 months. The lateral ligamentous laxity immediately after surgery correlated with the preoperative varus mechanical axis. Our data show residual lateral ligamentous laxity observed in preoperative varus deformity may be corrected spontaneously after TKA.

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“…This increase in the distance between the femoral and tibial surfaces can reach several millimeters as observed in MR images, 22 greater in the lateral side compared to the medial side. 22,23 When the knee is hanging from the bedside (Fig. 3 -top left), the little abduction moment is expected in the joint.…”

Section: Effect Of Limb Position and Knee Flexion Anglementioning

confidence: 99%

The Tibiofemoral Joint Gaps - An Arthroscopic Study

2017

SDRP-JBE

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Abstract:The articular surfaces of the tibiofemoral jointcommonly appear to have gaps in between during Arthroscopy operations. However, the same joint surfaces appear to be in contact inMR images. This discrepancy may be attributed to the pressure of the saline injected into the joint duringarthroscopy operations, insertion of cannulas, or anesthesia and the resulting absence of compressive force on the joint. This study examines the effect of these factors. Seven candidates of knee arthroscopysurgery participated in the study. The tibiofemoral joint space was observed with the arthroscope in different knee and hip flexion angles, with and without saline pressure, and with and without external compressive load. In the totally extended knee position, the joint was closed on both the lateral and medial sides. In the flexed knee positions, some of the joints showed a gap in either medial or lateral sides or both. Removing saline pressure and applying external compressive force on the knees did not affect the gaps. As this phenomenon cannot be explained with the conventional joint biomechanics, there is a need to revise the biomechanics of the knee joint, probably with the aid of the concepts laid in the theory of biotensegrity.

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Asymmetry of mediolateral laxity of the normal knee

Cited by 135 publications

References 9 publications

Lateral Soft Tissue Laxity Increases but Medial Laxity Does Not Contract With Varus Deformity in Total Knee Arthroplasty

Lateral Soft Tissue Laxity Increases but Medial Laxity Does Not Contract With Varus Deformity in Total Knee Arthroplasty

Postoperative Lateral Ligamentous Laxity Diminishes with Time After TKA in the Varus Knee

The Tibiofemoral Joint Gaps - An Arthroscopic Study

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