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Related Concept Videos

Knee Joint01:23

Knee Joint

The knee joint is the most complicated joint in the body. It consists of three articulations– two tibiofemoral and one patellofemoral. As is characteristic of synovial joints, the knee joint has a thin articular capsule that partially surrounds this joint cavity. Additionally, several ligaments, muscles, and cartilaginous structures support the movement of the knee.
A total of seven ligaments support the knee joint. The patellar ligament, which is also attached to the quadriceps femoris group...

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Related Experiment Video

Updated: Jun 26, 2026

The Transition to an Anterior-Based Muscle Sparing Approach Improves Early Postoperative Function but is Associated with a Learning Curve
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Achieving deep flexion after primary total knee arthroplasty.

Samih Tarabichi1, Yasir Tarabichi, Marwan Hawari

  • 1Joint Replacement Center, American Hospital, Dubai, UAE.

The Journal of Arthroplasty
|December 25, 2008
PubMed
Summary

The NexGen LPS Flex implant significantly improves knee flexion in total knee arthroplasty patients, achieving an average of 140 degrees flexion at 5 years without increasing pain or complications.

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Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering

Background:

  • Total knee arthroplasty (TKA) patients frequently experience limited knee flexion, hindering daily activities.
  • Flexion beyond 130 degrees is often challenging for individuals post-TKA.

Purpose of the Study:

  • To evaluate the long-term efficacy of the NexGen LPS Flex mobile bearing implant in TKA.
  • To assess the implant's impact on knee flexion, function, and patient-reported outcomes.

Main Methods:

  • Prospective study of 218 TKAs using the NexGen LPS Flex implant in 125 patients.
  • Minimum 5-year follow-up with data collected prospectively.
  • Preoperative and 5-year postoperative flexion, Knee Society scores, and complication rates were analyzed.

Main Results:

  • Average 5-year flexion reached 140 degrees +/- 11.5 degrees.
  • 68% of knees achieved flexion greater than 140 degrees at 5 years.
  • No significant differences in patellofemoral pain, complications, or Knee Society scores were observed compared to preoperative function.

Conclusions:

  • The NexGen LPS Flex implant effectively restores knee flexion in TKA patients.
  • The implant provides improved functional outcomes without compromising safety or increasing adverse events.