Patellar dislocation following total knee replacement.

Merkow, Robert L.; Soudry, Michael; Insall, J N

doi:10.2106/00004623-198567090-00003

Cited by 252 publications

(66 citation statements)

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“…A thin patella can reduce patellofemoral contact force but also poses the potential risk of stress fracture and anteroposterior instability [8,16]. Increasing patellar thickness might be expected to increase effective quadriceps moment arm at low flexion angles of the knee but potentially reduces range of motion and predisposes to patellar subluxation [9,12]. It commonly is assumed that it is desirable for a resurfaced patella to be equal to its original thickness [1,6,8,13,16], and a bony patellar thickness of at least 15 mm should be maintained [16].…”

Section: Introductionmentioning

confidence: 99%

Clinical Implications of Anthropometric Patellar Dimensions for TKA in Asians

Kim

Chung

Kang

et al. 2008

Clin Orthop Relat Res

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Anthropometric patellar dimensions can influence implant design and surgical techniques in patellar resurfacing for TKA. We measured anthropometric patellar dimensions in 752 osteoarthritic knees (713 in females and 39 in males) treated with TKA in 466 Korean patients and compared them with reported dimensions for Western patients. We investigated the effects of postoperative overall thickness deviations, residual bony thickness after bone resection, and postoperative deviations of component center positions from median ridge positions versus clinical and radiographic outcomes evaluated 1 year after surgery. Korean patients undergoing TKA had thinner and smaller patellae than Western patients. We found no associations between preoperative to postoperative overall thickness differences and clinical and radiographic outcomes and no differences between knees with a residual bony thickness 12 mm or greater and knees with a residual thickness less than 12 mm, with the exception of WOMAC pain scores. We found no associations between postoperative deviations of component center position and clinical or radiographic outcomes. Our findings indicate bone resection for patellar resurfacing can be flexible without jeopardizing clinical outcome.

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Section: Introductionmentioning

confidence: 99%

Clinical Implications of Anthropometric Patellar Dimensions for TKA in Asians

Kim

Chung

Kang

et al. 2008

Clin Orthop Relat Res

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“…Although the success of knee arthroplasty has improved dramatically over recent years (Insall et al 1976, Merkow et al 1985, Goodfellow and O'Connor 1986. 1989), the patellar articulation remains a frequent source of complications (Scott et al 1978, Sneppen et al 1978, Merkow et al 1985.…”

Section: Discussionmentioning

confidence: 99%

Patellar complications after knee arthroplasty

Johnson

Eastwood

1992

Acta Orthopaedica Scandinavica

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“…Similarly, components that are malaligned in the coronal or sagittal plane will contribute to failures of the patellofemoral joint. An overall limb malalignment of >10°of valgus or a femoral component positioned in >7°of valgus increases the Q angle and, thus, maltracking [20,21]. Finally, and arguably most important, is the rotation of the femoral and tibial components [15,16,20,22,23].…”

Section: Influence Of Tibiofemoral Jointmentioning

confidence: 99%

“…Mild combined internal rotation (1°-4°) caused lateral patellar tracking and patellar tilting, whereas moderate internal rotation (5°-8°) caused subluxation, and severe internal rotation (7°-17°) caused patellar dislocation or component failure. The rotation of the tibia is also essential [15,16,20,25]. If the tibial component is internally rotated relative to the cut surface of the tibial plateau, the tibia will be externally rotated relative to the femur.…”

Section: Influence Of Tibiofemoral Jointmentioning

confidence: 99%

The patella in total knee arthroplasty: to resurface or not is the question

Abdel

Parratte

Budhiparama³

2014

Curr Rev Musculoskelet Med

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The decision to resurface the patella during total knee arthroplasty remains controversial. Even though some surgeons routinely resurface the patella to avoid the increased rates of postoperative anterior knee pain and reoperation for secondary resurfacing, others selectively resurface based on the presence of anterior knee pain, notably damaged articular cartilage, inflammatory arthritis, isolated patellofemoral arthritis, and patellar subluxation and maltracking. The anatomy and biomechanics of the patellofemoral joint, combined with advances in surgical technique and prostheses must be taken into account when making a decision to resurface the patella. Accurate component implantation is imperative for a successful outcome if the patella is resurfaced.

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Patellar dislocation following total knee replacement.

Cited by 252 publications

References 0 publications

Clinical Implications of Anthropometric Patellar Dimensions for TKA in Asians

Clinical Implications of Anthropometric Patellar Dimensions for TKA in Asians

Patellar complications after knee arthroplasty

The patella in total knee arthroplasty: to resurface or not is the question

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