Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

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...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Incidence of secondary displacement after osteosynthesis of proximal humerus fractures: a retrospective study of 185 cases.

Acta orthopaedica Belgica·2023
Same author

[Treatment switch in diabetic macular edema: Literature review and management algorithm].

Journal francais d'ophtalmologie·2020
Same author

Treatments of avascular osteonecrosis of the hip: Current treatments.

Morphologie : bulletin de l'Association des anatomistes·2020
Same author

Which is the optimal orthogeriatric care model to prevent mortality of elderly subjects post hip fractures? A systematic review and meta-analysis based on current clinical practice.

International orthopaedics·2018
Same author

Emergence and multiple reassortments of French 2015-2016 highly pathogenic H5 avian influenza viruses.

Infection, genetics and evolution : journal of molecular epidemiology and evolutionary genetics in infectious diseases·2018
Same author

Total knee arthroplasty with the Medial-Pivot knee system: Clinical and radiological outcomes at 9.5 years' mean follow-up.

Orthopaedics & traumatology, surgery & research : OTSR·2017
Same journal

When the brain never fully registers surgery and postoperative inflammation is controlled: a two-phase model of postoperative pain.

Orthopaedics & traumatology, surgery & research : OTSR·2026
Same journal

Arthroscopic anatomic reconstruction of the ATFL and CFL using allograft: Return to sport and one-year functional outcomes in chronic ankle instability.

Orthopaedics & traumatology, surgery & research : OTSR·2026
Same journal

Survival and Recurrence of Infection After Revision of Infected Total Elbow Arthroplasty: A French Multicenter Study (2013-2023) of 137 infected Total Elbow Arthroplasties.

Orthopaedics & traumatology, surgery & research : OTSR·2026
Same journal

Tibiotalocalcaneal arthrodesis using a retrograde intramedullary nail and augmented allograft after failed total ankle replacement: an exploratory retrospective matched cohort study.

Orthopaedics & traumatology, surgery & research : OTSR·2026
Same journal

Comparison between arithmetic, osteoarthritic and prosthetic HKA: a cohort of computer assisted unrestricted kinematically aligned TKA patients.

Orthopaedics & traumatology, surgery & research : OTSR·2026
Same journal

MRI assessment of muscle damage in total hip arthroplasty via SuperPATH approach.

Orthopaedics & traumatology, surgery & research : OTSR·2026
See all related articles

Related Experiment Video

Updated: Jun 11, 2026

In Vitro Application of a Wireless Sensor in Flexion-Extension Gap Balance of Unicompartmental Knee Arthroplasty
07:33

In Vitro Application of a Wireless Sensor in Flexion-Extension Gap Balance of Unicompartmental Knee Arthroplasty

Published on: May 5, 2023

Does hyperflex total knee design improve postoperative active flexion?

P Massin1, F-R Dupuy, H Khlifi

  • 1Department of Orthopaedic Surgery, Bichat Hospital, North-Paris Teaching Hospitals Group, Paris Diderot Medical School, Paris, France. philippe.massin@bch.aphp.fr

Orthopaedics & Traumatology, Surgery & Research : OTSR
|July 6, 2010
PubMed
Summary
This summary is machine-generated.

The rotating platform flexion (RPF) Sigma total knee prosthesis offers improved flexion gain compared to the conventional rotating platform (RP) design, particularly for patients with moderate preoperative flexion. This enhanced range of motion benefits specific patient groups undergoing knee replacement surgery.

More Related Videos

The Transition to an Anterior-Based Muscle Sparing Approach Improves Early Postoperative Function but is Associated with a Learning Curve
09:51

The Transition to an Anterior-Based Muscle Sparing Approach Improves Early Postoperative Function but is Associated with a Learning Curve

Published on: September 7, 2022

Related Experiment Videos

Last Updated: Jun 11, 2026

In Vitro Application of a Wireless Sensor in Flexion-Extension Gap Balance of Unicompartmental Knee Arthroplasty
07:33

In Vitro Application of a Wireless Sensor in Flexion-Extension Gap Balance of Unicompartmental Knee Arthroplasty

Published on: May 5, 2023

The Transition to an Anterior-Based Muscle Sparing Approach Improves Early Postoperative Function but is Associated with a Learning Curve
09:51

The Transition to an Anterior-Based Muscle Sparing Approach Improves Early Postoperative Function but is Associated with a Learning Curve

Published on: September 7, 2022

Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering
  • Reconstructive Surgery

Background:

  • The Sigma rotating platform flexion (RPF) total knee prosthesis was engineered to enhance high-flexion range by maintaining condylar contact.
  • This design necessitates an additional posterior bone cut, aiming to surpass the flexion capabilities of conventional rotating platform (RP) implants.

Purpose of the Study:

  • To evaluate the hypothesis that the RPF Sigma prosthesis provides a greater increase in knee flexion compared to the conventional RP design.
  • To compare flexion gain, range of motion (ROM) gain, and active flexion between RPF and RP implants.

Main Methods:

  • A retrospective study comparing 59 patients with RPF implants against 59 matched patients with RP implants.
  • Patient selection criteria included osteoarthritis, excluding those with flexion contracture >20 degrees or <90 degrees, and BMI >30.
  • Postoperative mobility was assessed using a goniometer.

Main Results:

  • The RPF group demonstrated significantly greater flexion gain (13±20 vs. 6±13 degrees) and ROM gain (10±17 vs. 4±12 degrees) compared to the RP group (p=0.02).
  • In patients with preoperative flexion <120 degrees, RPF showed significantly greater flexion and ROM gains, and higher one-year active flexion (124±13 vs. 116±8 degrees, p=0.02).
  • No significant difference in one-year active mean flexions was observed between groups overall (118±14 vs. 116±6 degrees, p=0.47).

Conclusions:

  • The Sigma RPF prosthesis offers a significant advantage in flexion gain for patients with 90-120 degrees of preoperative flexion and less than 20 degrees of flexion contracture.
  • Patients with over 120 degrees of preoperative flexion showed comparable flexion outcomes, with some experiencing decreased flexion regardless of implant type.