Is Standard 3-degree of External Rotation for Posterior Femoral Cut Relevant for Turkish Population

Is Standard 3-degree of External Rotation for Posterior Femoral Cut Relevant for Turkish Population: An Anthropometric MRI Study

The aim of this study is to evaluate the posterior condylar angle of the distal femur in Turkish population and its concordance with the current standard prosthesis designs used in total knee arthroplasty and to evaluate anthropometric features of the distal femur in the Turkish population.

Study Overview

• Status: Completed
• Conditions: Healthy

Detailed Description

The investigators would like to measure condylar twist angles(CTA), posterior condylar angles(PCA), femoral mediolateral lengths (fML), medial femoral anteroposterior lengths(fMAP), lateral femoral anteroposterior lengths (fLAP), distances between trochlear groove and fMAP(DBTG-fMAP), distances between trochlear groove and fLAP(DBTG-fLAP), medial and lateral posterior condylar cartilage thicknesses(MPCCT/LPCCT) on the Magnetic Resonance Images (MRI) of 240 knees of 120 Turkish subjects.

• Study Type: Observational
• Enrollment (Actual): 120

Contacts and Locations

Study Locations

• Turkey
  • Istanbul, Turkey, 34093
    • Bezmialem Vakıf University

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 70 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

• Sampling Method: Probability Sample

Study Population

Healty subjects with Turkish ethnic orijin

Description

Inclusion Criteria:

• non-arthritic knees,

Exclusion Criteria: Patients with,

• intra- or extraarticular deformity on the X-rays or MRIs,
• history of previous extremity surgery,
• history of any systemic disease,
• a BMI of 35 or over.

Study Plan

How is the study designed?

Design Details

• Observational Models: Cohort
• Time Perspectives: Retrospective

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
condylar twist angle and posterior condylar angle	The condylar twist angle (CTA) is an angle between anatomical transepicondylar axis (TEA),which lying from medial epicondyle to lateral epicondyle of the distal femur, and posterior condylar axis (PCAx). The posterior condylar angle (PCA) is an angle between surgical TEA, which lying from medial epicondylar sulcus to lateral epicondyle, and PCAx[1].	about 5 days

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
mediolateral lenght of the distal femur (fML)	The widest mediolateral lenght of the distal femur (fML) in the axial plane which equal to transepicondylar axis	about 5 days
medial anteroposterior lengt (fMAP) and lateral anteroposterior lengt (fLAP)	the longest anteropesterior distances of the medial and lateral condyles over the cartilage tissue od the distal femur on the axial images[2].	about 5 days
Distance between trochlear groove and fMAP (DBTG-fMAP) and distance between trochlear groove and lateral fAP(DBTG- fLAP)	MRI sections obtained 3 cm above the tibiofemoral joint will use for evaluation of deepest point of the trochlear groove.The distance between trochlear groove to fMAP and fLAP	about 5 days
Medial and lateral posterior condylar cartilage thicknesses (MPCCT/LPCCT)	MPCCT/LPCCT were measured at the deepest point in the axial plan.	about 5 day

Collaborators and Investigators

• Sponsor: Bezmialem Vakif University
• Investigators: Principal Investigator: Nurdan Güngören, Bezmialem Vakif University

Publications and helpful links

General Publications

• Loures FB, Furtado Neto S, Pinto Rde L, Kinder A, Labronici PJ, Goes RF, Marchiori E. Rotational assessment of distal femur and its relevance in total knee arthroplasty: analysis by magnetic resonance imaging. Radiol Bras. 2015 Sep-Oct;48(5):282-6. doi: 10.1590/0100-3984.2014.0037.
• Kim TK, Phillips M, Bhandari M, Watson J, Malhotra R. Erratum to: What Differences in Morphologic Features of the Knee Exist Among Patients of Various Races? A Systematic Review. Clin Orthop Relat Res. 2017 May;475(5):1507. doi: 10.1007/s11999-017-5301-1. No abstract available.

Study record dates

Study Major Dates

• Study Start (Actual): February 1, 2020
• Primary Completion (Actual): March 30, 2020
• Study Completion (Actual): April 12, 2020

Study Registration Dates

• First Submitted: April 17, 2020
• First Submitted That Met QC Criteria: April 20, 2020
• First Posted (Actual): April 21, 2020

Study Record Updates

• Last Update Posted (Actual): April 22, 2020
• Last Update Submitted That Met QC Criteria: April 20, 2020
• Last Verified: April 1, 2020

More Information

Terms related to this study

• Keywords: total knee arthroplasty; anthropometric measurements; posterior condylar angle; external rotation; 3 degrees; Turkish population
• Other Study ID Numbers: 3586

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No