Biomechanical Assessment of Femoroacetabular Impingement

NCT ID: NCT01575964

Last Updated: 2026-01-09

Basic Information

• Recruitment Status: ENROLLING_BY_INVITATION
• Total Enrollment: 36 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2012-01-31
• Study Completion Date: 2028-12-31

Brief Summary

The purpose of this study is to determine the influence of FAI abnormalities on hip joint biomechanics.

Detailed Description

The purpose of this study is to quantify hip biomechanics of subjects with and without FAI.

The results of this study will advance our understanding of how the FAI alters the biomechanics of the hip joint, improving diagnosis and directing treatment strategies.

Conditions

Femoro Acetabular Impingement

Study Design

• Observational Model Type: CASE_CONTROL
• Study Time Perspective: PROSPECTIVE

Eligibility Criteria

Inclusion Criteria

• Patients who present with hip pain subsequently diagnosed as femoroacetabular impingement
• Subjects who meet the following radiographic criterion of cam or pincer FAI, will be given the opportunity to volunteer in this study.
• Subjects that demonstrate a cross-over-sign or a lateral center edge angle (LCEA) without an alpha angle, will be classified as having pincer FAI.
• Subjects with an alpha angle, without a cross-over sign or LCEA, will be categorized as having cam type FAI.
• Finally, with at least one cam (alpha angle) and pincer sign "cross-over-sign or a lateral center edge angle (LCEA)" will be classified as mixed FAI.

• 12 controls will consist of volunteers in the same age range as the subject groups (18-35 years).
• Control hips will be screened with a standard AP radiograph. Normal volunteers who have radiographic evidence of FAI, dysplasia or other joint deformities will be excluded.

Exclusion Criteria

• Subjects who have radiographic evidence of osteoarthritis (Tonnis Grade III or IV) will be excluded as this study focuses on the mechanics of hips before prominent cartilage damage.
• Subjects who have had prior procedures to correct FAI or other hip conditions will be excluded (exploratory procedures will be included).
• Minors (under age 18), mentally disabled, persons incarcerated, on parole, probation awaiting trial, or pregnant women are excluded from this study.
• A human Chorionic Gondaotropin (hCG) urine pregnancy test will be performed on all women prior to the study.
• To limit the annual radiation exposure to any participating volunteers, we will exclude anyone who has had a CT scan or participated in a research study involving ionizing radiation in the past 12 months.

• Subjects who are unwilling or unable to perform the proposed activities of daily living or undergo the clinical exams will be dismissed.
• Subjects with a BMI less than 30 (www.nhlbisupport.com/bmi/) or those with dense hip musculature/wide hips (maximum of 42 cm of circumferential hip length) will be excluded.

• Subjects who are unwilling or unable to remain still.
• Subjects who are allergic to contrast agent and/or lidocaine will be dismissed.

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 35 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

University of Utah

OTHER

Sponsor Role: lead

Responsible Party

Andrew Anderson

Associate Professor

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Andrew Anderson

Role: PRINCIPAL_INVESTIGATOR

Orthopedic Surgery Operations

Locations

University of Utah Orthopaedic Center

Salt Lake City, Utah, United States

Countries

United States

Other Identifiers

51053

Identifier Type: -

Identifier Source: org_study_id