Pre-operative Radiological Measurement to Assess Femur Rotational Alignment

Overview

Purpose: This study outlines the benefits of the proximal tibia angle (PTA) in evaluation of the pre-operative individual condylar twist angle (CTA) in total knee arthroplasty. Methods: Condylar twist angle and proximal tibia angle were obtained from 33 female healthy participants using computed tomography (CT). The CTA, angle between clinical transepicondylar axis and posterior condylar line were measured. The PTA is the angle formed between the mechanical axis of the tibia and tibia plateau line. The correlation between the CTA and the PTA was analyzed statistically with the linear regression.

Full Title of Study: “Pre-operative Radiological Measurement of Proximal Tibia Angle to Assess Femur Rotational Alignment in Total Knee Arthroplasty”

Study Type

  • Study Type: Observational
  • Study Design
    • Time Perspective: Prospective
  • Study Primary Completion Date: August 2016

Arms, Groups and Cohorts

  • CT
    • Measured with computed tomography
  • plain Radiography
    • Measured with plain Radiography

Clinical Trial Outcome Measures

Primary Measures

  • proximal tibia angle (PTA)
    • Time Frame: Four months
    • The PTA is the angle formed between the mechanical axis of the tibia and tibia plateau line.

Secondary Measures

  • Condylar twist angle (CTA)
    • Time Frame: Four months
    • The CTA is the angle between clinical transepicondylar axis and posterior condylar line

Participating in This Clinical Trial

Inclusion Criteria

  • Osteoarthritis Varus knee deformity Exclusion Criteria:

  • Rheumatoid arthritis valgus knee OA previous knee surgeries posttraumatic arthritis

Gender Eligibility: Female

Minimum Age: 40 Years

Maximum Age: 80 Years

Are Healthy Volunteers Accepted: No

Investigator Details

  • Lead Sponsor
    • Xi’an Honghui Hospital
  • Provider of Information About this Clinical Study
    • Sponsor
  • Overall Official(s)
    • Jianbing Ma, MD, Study Director, Honghui Hospital
  • Overall Contact(s)
    • Qiang He, MD, 13572887175, heqianghonghui@163.com

References

Kanekasu K, Kondo M, Kadoya Y. Axial radiography of the distal femur to assess rotational alignment in total knee arthroplasty. Clin Orthop Relat Res. 2005 May;(434):193-7. doi: 10.1097/01.blo.0000156819.24866.8b.

Savin L, Botez P, Mihailescu D, Predescu V, Grierosu C. Pre-operative radiological measurement of femoral rotation for prosthetic positioning in total knee arthroplasty. Int Orthop. 2016 Sep;40(9):1855-60. doi: 10.1007/s00264-015-3110-2. Epub 2016 Jan 23.

Kobayashi H, Aratake M, Akamatsu Y, Mitsugi N, Taki N, Saito T. Reproducibility of condylar twist angle measurement using computed tomography and axial radiography of the distal femur. Orthop Traumatol Surg Res. 2014 Dec;100(8):885-90. doi: 10.1016/j.otsr.2014.07.025. Epub 2014 Nov 20.

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