Two Year Study With Robotic-Arm Assisted Hip Surgery.

Not Applicable

Completed

Conditions: Hip Osteoarthritis
Surgery

Interventions: Procedure: Robotic-Arm Assisted THA

Registration Number: NCT03891199

Lead Sponsor: West Virginia University

Brief Summary: This study will involve a quantitative assessment of prospectively collected computed tomography, radiographic and patient outcomes data from multiple centers. Specifically looking at acetabular cup placement during Total Hip Arthroplasty by either traditional or robotic-arm assisted placement.

Detailed Description: The incidence of dislocation following total hip arthroplasty (THA) has been reported to be from 1% to as much as 3.2%. The demand for THA is expected to increase. Post- dislocation solutions include closed reduction, open reduction, THA revision, and constrained cup, conversion to hemiarthroplasty, allograft or girdlestone resection. These solutions are often costly, painful and can involve substantial additional risks and complications. Acetabular cup placement is an important factor in the stability of the THA. Cup malpositioning has been associated with bearing surface ware and dislocation. For most patients, acceptable angles for abduction are 40° abduction (±10°) and 20° (±5°) version. However, malpositioning continues to occur resulting in cup angles outside acceptable ranges and leaving patients with an increased risk of dislocation.

This objective of this study is to examine the acetabular cup placement of THA patients and compare results for patients who undergo THA with robotic-arm assistance with those who undergo traditional THA.

Recruitment & Eligibility

Status: COMPLETED

Sex: All

Target Recruitment: 40

Inclusion Criteria

Patients requiring primary total hip arthroplasty
Patients willing and able to comply with follow-up requirements
Patients willing to sign an Institutional Review Board approved informed consent form.

Exclusion Criteria

Patients with Body Mass Index >45
Patients who are <18 years of age
Patients with an active infection or suspected latent infection in or about the hip joint
Bone stock that is inadequate for support or fixation of the prosthesis
Previous major hip surgery excluding hip arthroscopy
Total hip arthroplasty using cement fixation or resurfacing

Study & Design

Study Type: INTERVENTIONAL

Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Intervention	Robotic-Arm Assisted THA	Robotic-arm assisted THA.

Primary Outcome Measures

Name	Time	Method
Accuracy of Acetabular Cup Placement Manually vs. Robotic-arm Assisted - Version.	6 months	Accuracy of cup placement will be measured by absolute value of degrees from target version (40 degrees). Using CT (Computed Tomography) Scans, analysis and radiographs will allow for a complete description of cup placement, and better accounts for factors such as pelvic rotation and/or tilt, otherwise not accounted for in radiographic analysis alone.
Change in Patient Reported "Hip Dysfunction and Osteoarthritis Outcome Score" (HOOS) Survey Over 1 Year Period.	1 Year	The hip disability and osteoarthritis outcome score (HOOS) is a questionnaire intended to be used to assess the patient's opinion about their hip and associated problems and to evaluate symptoms and functional limitations related to the hip during a therapeutic process . To interpret the score, the outcome measure is transformed in a worst to best scale from 0 to 100, with 100 indicating no symptoms and 0 indicating extreme symptoms. To calculate the total HOOS score the subscales need to be summed up.
Change in "Patient-Reported Outcomes Measurement Information System" (PROMIS) Survey Over a 1 Year Period.	1year	The PROMIS Global-10 is a global health quality of life patient reported outcome tool. It is part of the Patient-Reported Outcomes Measurement Information System (PROMIS). It measures symptoms, functioning, and healthcare quality of life for a wide variety of conditions. The PROMIS Global-10 consists of 10 questions assessing physical health, mental health, social health, pain, fatigue, and overall perceived quality of life. 7 questions inquire about health in "general" and 3 questions assess emotional problems, fatigue and pain in the last 7 days. PROMIS 10 Global Physical Health- Scale range (0-20) and what the low number means vs the high number (ex 0 equals worse physical health and 20 equals the best physical health). PROMIS 10 Global Mental Health- Scale range (0-20) and what the low number means vs the high number (ex 0 equals worse mental health and 20 equals the best mental health)
Accuracy of Acetabular Cup Placement Manually vs. Robotic-arm Assisted - Inclination.	6 months	Accuracy of cup placement will be measured by absolute value of degrees from target inclination (20 degrees). Using CT (Computed Tomography) Scans, analysis and radiographs will allow for a complete description of cup placement, and better accounts for factors such as pelvic rotation and/or tilt, otherwise not accounted for in radiographic analysis alone.
Adherence to Lewinnek Safe Zone	6 month	5-25 degrees of anteversion; 30-50 degrees of inclination.