Kinematics of monoblock bicompartmental knee arthroplasty during weight-bearing activities

Accurate knowledge of in vivo articular contact kinematics and contact forces is required to quantitatively understand factors limiting life of total knee arthroplasty (TKA) implants, such as polyethylene component wear and implant loosening [1]. Determination of in vivo tibiofemoral contact forces has been a challenging issue in biomechanics. Historically, instrumented tibial implants have been used to measure tibiofemoral forces in vitro [2] and computational models involving inverse dynamic optimization have been used to estimate joint forces in vivo [3]. Recently, D’Lima et al. reported the first in vivo measurement of 6DOF tibiofemoral forces via an instrumented implant in a TKA patient [4]. However this technique does not provide a direct estimation of tibiofemoral contact forces in the medial and lateral compartments. Recently, a dual fluoroscopic imaging system has been used to accurately determine tibiofemoral contact locations on the medial and lateral tibial polyethylene surfaces [5]. The objective of this study was to combine the dual fluoroscope technique and the instrumented TKAs to determine the dynamic 3D articular contact kinematics and contact forces on the medial and lateral tibial polyethylene surfaces during functional activities.

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Bicompartmental Knee Arthroplasty

Essentials of Cemented Knee Arthroplasty ◽

10.1007/978-3-662-63113-3_18 ◽

2022 ◽

pp. 199-207

Author(s):

Michael D. Ries

Keyword(s):

Knee Arthroplasty ◽

Bicompartmental Knee Arthroplasty

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Bicompartmental Knee Arthroplasty

Insall &amp Scott Surgery of the Knee ◽

10.1016/b978-1-4377-1503-3.00102-5 ◽

2012 ◽

pp. 1021-1025

Author(s):

Michael S. Shin ◽

V. Karthik Jonna ◽

Alfred J. Tria

Keyword(s):

Knee Arthroplasty ◽

Bicompartmental Knee Arthroplasty

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Weight Bearing Activities change the Pivot Position after Total Knee Arthroplasty

Scientific Reports ◽

10.1038/s41598-019-45694-y ◽

2019 ◽

Vol 9 (1) ◽

Cited By ~ 3

Author(s):

Philippe Moewis ◽

Hagen Hommel ◽

Adam Trepczynski ◽

Leonie Krahl ◽

Philipp von Roth ◽

...

Keyword(s):

Total Knee Arthroplasty ◽

Knee Arthroplasty ◽

Weight Bearing ◽

Total Knee

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Radiographic Comparison of the Mechanical Axis Including Calcaneus to the Conventional Mechanical Axis in Medial Unicompartmental Knee Arthroplasty

The Journal of Knee Surgery ◽

10.1055/s-0039-3402044 ◽

2019 ◽

Cited By ~ 1

Author(s):

Yuichi Kuroda ◽

Koji Takayama ◽

Kazunari Ishida ◽

Shinya Hayashi ◽

Shingo Hashimoto ◽

...

Keyword(s):

Knee Arthroplasty ◽

Unicompartmental Knee Arthroplasty ◽

Tibial Component ◽

Mechanical Axis ◽

Weight Bearing ◽

Postoperative Outcome ◽

Diagnostic Study ◽

Hindfoot Alignment ◽

Unicompartmental Knee ◽

The Mean

AbstractSince a hindfoot alignment is not included in the conventional mechanical axis (hip–ankle [HA] line), a mechanical axis including the calcaneus (hip–calcaneus [HC] line) has recently attracted attention as an alternative weight-bearing line. However, there are few reports on unicompartmental knee arthroplasty (UKA) regarding the HC line. Therefore, this study aimed to compare postoperative alignments after UKA between the HA line and the HC line. Postoperatively, HC radiographs were taken in 88 consecutive patients who underwent medial UKA. The hip–knee–ankle (HKA) and hip–knee–calcaneus (HKC) angles were compared in the same patient. Regarding tibial inclination, the conventional tibial component–ankle (TCA) angle was compared with reference to the HC line (tibial component–calcaneus [TCC] angle). The mean postoperative HKA and HKC angles were 2.8 ± 2.7 and 2.0 ± 2.5 degree, respectively. The mean postoperative TCA and TCC angles were 87.7 ± 2.1 and 88.5 ± 2.1 degree, respectively. There were significant differences between the two groups in both lower limb alignment and tibial component angle. The present study indicated that the HKC and the TCC angles significantly decreased the varus alignment by approximately 1 degree compared with the HKA and TCA angles. Neutral in the HA line corresponds to valgus in reference to the HC line, which may result in overcorrection. Surgeons should consider evaluating the HC line in place of the HA line, which may affect preoperative planning and postoperative outcome during UKA. This is a Level II, diagnostic study.

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Inducible displacement of cemented tibial components ten years after total knee arthroplasty

The Bone & Joint Journal ◽

10.1302/0301-620x.100b2.bjj-2017-0428.r2 ◽

2018 ◽

Vol 100-B (2) ◽

pp. 170-175 ◽

Cited By ~ 2

Author(s):

K. Lam Tin Cheung ◽

B. A. Lanting ◽

R. W. McCalden ◽

X. Yuan ◽

S. J. MacDonald ◽

...

Keyword(s):

Total Knee Arthroplasty ◽

Internal Rotation ◽

Knee Arthroplasty ◽

Weight Bearing ◽

Prospective Trial ◽

Radiolucent Lines ◽

Point Motion ◽

Total Knee ◽

One Year ◽

Total Point

Aims The aim of this study was to evaluate the long-term inducible displacement of cemented tibial components ten years after total knee arthroplasty (TKA). Patients and Methods A total of 15 patients from a previously reported prospective trial of fixation using radiostereometric analysis (RSA) were examined at a mean of 11 years (10 to 11) postoperatively. Longitudinal supine RSA examinations were acquired at one week, one year, and two years postoperatively and at final follow-up. Weight-bearing RSA examinations were also undertaken with the operated lower limb in neutral and in maximum internal rotation positions. Maximum total point motion (MTPM) was calculated for the longitudinal and inducible displacement examinations (supine versus standing, standing versus internal rotation, and supine versus standing with internal rotation). Results All patients showed some inducible displacement. Two patients with radiolucent lines had greater mean standing-supine MTPM displacement (1.35; sd 0.38) compared with the remaining patients (0.68; sd 0.36). These two patients also had a greater mean longitudinal MTPM at ten years (0.64; sd 0.50) compared with the remaining patients (0.39; sd 0.13 mm). Conclusion Small inducible displacements in well-fixed cemented tibial components were seen ten years postoperatively, of a similar magnitude to that which has been reported for well-fixed components one to two years postoperatively. Greater displacements were found in components with radiolucent lines. Cite this article: Bone Joint J 2018;100-B:170–5.

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Is bicompartmental knee arthroplasty more favourable to knee muscle strength and physical performance compared to total knee arthroplasty?

Knee Surgery Sports Traumatology Arthroscopy ◽

10.1007/s00167-013-2489-9 ◽

2013 ◽

Vol 21 (11) ◽

pp. 2532-2541 ◽

Cited By ~ 18

Author(s):

Jun Young Chung ◽

Byoung-Hyun Min

Keyword(s):

Total Knee Arthroplasty ◽

Muscle Strength ◽

Physical Performance ◽

Knee Arthroplasty ◽

Total Knee ◽

Knee Muscle ◽

Bicompartmental Knee Arthroplasty ◽

Knee Muscle Strength

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Fracture of the Tibial Baseplate in Bicompartmental Knee Arthroplasty

Case Reports in Orthopedics ◽

10.1155/2015/693025 ◽

2015 ◽

Vol 2015 ◽

pp. 1-5 ◽

Cited By ~ 1

Author(s):

Bart Stuyts ◽

Melanie Vandenberghe ◽

Hans Van der Bracht ◽

Yves Fortems ◽

Elke Van den Eeden ◽

...

Keyword(s):

Total Knee Arthroplasty ◽

Case Report ◽

Knee Arthroplasty ◽

Conservative Therapy ◽

High Impact ◽

Daily Routine ◽

Early Generation ◽

Case Presentation ◽

Total Knee ◽

Bicompartmental Knee Arthroplasty

Introduction. Bicompartmental knee arthroplasty (BKA) addresses combined medial and patellofemoral compartment osteoarthritis, which is relatively common, and has been proposed as a bridge between unicompartmental and total knee arthroplasty (TKA).Case Presentation. We present the case report of a young active man treated with BKA after unsuccessful conservative therapy. Four years later, loosening with fracture of the tibial baseplate was identified and the patient was revised to TKA.Discussion. Although our case is only the second fractured tibial baseplate to be reported, we believe that the modular titanium design, with two fixation pegs, is too thin to withstand daily cyclic loading powers. Light daily routine use, rather than high-impact sports, is therefore advised. Failures may also be related to the implant being an early generation and known to be technically complex, with too few implant sizes. We currently use TKA for the treatment of medial and patellofemoral compartment osteoarthritis.

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