[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100618901":3},{"organization":4,"armGroups":7,"interventions":18,"overallOfficials":11,"centralContacts":31,"locations":37,"responsibleParty":54,"collaborators":11,"id":56,"slug":57,"hasResults":58,"nctId":59,"briefTitle":60,"officialTitle":61,"acronym":11,"eligibilityCriteria":62,"healthyVolunteers":58,"sex":63,"minAge":64,"maxAge":65,"enrollmentInfo":66,"targetDuration":11,"studyType":69,"phases":70,"briefSummary":72,"conditions":73,"keywords":11,"overallStatus":40,"whyStopped":11,"lastUpdateSubmitDate":75,"lastUpdatePostDateStruct":76,"startDateStruct":79,"completionDateStruct":81,"leadSponsor":83,"locationsCount":84},{"fullName":5,"class":6},"Medstar Health Research Institute","OTHER",[8,14],{"label":9,"type":10,"description":11,"interventionNames":12},"Collard stem","ACTIVE_COMPARATOR",null,[13],"Other: Collared Femoral Stem",{"label":15,"type":10,"description":11,"interventionNames":16},"Collarless stem",[17],"Other: Collarless Femoral Stem",[19,25],{"type":6,"name":20,"description":21,"armGroupLabels":22,"otherNames":23},"Collarless Femoral Stem","Patients will be randomized to one of two groups receiving either a collarless or collared femoral stem. Patients randomized to this group will receive a collarless femoral stem implant at time of surgery.",[15],[24],"Collarless",{"type":6,"name":26,"description":27,"armGroupLabels":28,"otherNames":29},"Collared Femoral Stem","Patients will be randomized to one of two groups receiving either a collarless or collared femoral stem. Patients randomized to this group will receive a collared femoral stem at the time of surgery.",[9],[30],"collared",[32],{"name":33,"role":34,"phone":35,"phoneExt":11,"email":36},"Miles Hollimon, B.S.","CONTACT","(202) 444-8766","miles.hollimon@medstar.net",[38],{"facility":39,"status":40,"city":41,"state":42,"zip":43,"country":44,"countryCode":45,"cosmosGeoPoint":46,"geoPoint":51,"contacts":52},"MedStar Georgetown University Hospital","RECRUITING","Washington D.C.","District of Columbia","20007","United States","US",{"type":47,"coordinates":48},"Point",[49,50],-77.03637,38.89511,{"lat":50,"lon":49},[53],{"name":33,"role":34,"phone":35,"phoneExt":11,"email":36},{"type":55,"investigatorFullName":11,"investigatorTitle":11,"investigatorAffiliation":11,"oldNameTitle":11,"oldOrganization":11},"SPONSOR","100618901","comparing-collared-and-collarless-femoral-stems-in-primary-total-hip-arthroplasty-100618901",false,"NCT07337642","Comparing Collared and Collarless Femoral Stems in Primary Total Hip Arthroplasty","Comparing Collared and Collarless Femoral Stems in Total Hip Arthroplasty","Inclusion Criteria:\n\n* Adults (≥ 18 years old) scheduled for primary, uncemented THA using a cementless femoral stem\n* Diagnosis of primary osteoarthritis or other non-inflammatory degenerative joint disease.\n* Ability and willingness to comply with study procedures and follow-up schedule.\n* Ability to provide written informed consent\n\nExclusion Criteria:\n\n* Patients not indicated for a cementless THA\n* Prior surgery on the ipsilateral hip (e.g., prior THA, internal fixation, osteotomy)\n* Use of cemented or hybrid femoral components.\n* Revision THA or conversion THA\n* Active or prior infection of the hip joint.\n* Severe osteoporosis (T-score ≤ -2.5) or known metabolic bone disease.\n* Inability to complete follow-up or anticipated relocation out of the area.","ALL","18 Years","99 Years",{"count":67,"type":68},100,"ESTIMATED","INTERVENTIONAL",[71],"NA","This is a prospective randomized control trial comparing two collared and collarless femoral implants used in primary total hip arthroplasty. The specific aims of this trial are to:\n\nSA1: Prospectively assess clinical outcomes in patients undergoing primary total hip arthroplasty with a collared versus collarless femoral stem of the same design.\n\nSA2: Evaluate serial radiographs to quantify differences in subsidence between collared and collarless implant groups.\n\nSA3: Report and compare incidence rates of intraoperative and postoperative periprosthetic fractures and aseptic loosening following primary total hip arthroplasty with use of either a collared or collarless stem.\n\nHypothesis: The addition of a collar to the same designed triple-taper primary hip stem will lead to a reduction in subsidence and incidence of perioperative and periprosthetic femur fractures.",[74],"Primary Total Hip Arthroplasty","2026-01-12",{"date":77,"type":78},"2026-01-13","ACTUAL",{"date":80,"type":78},"2025-12-03",{"date":82,"type":68},"2027-12-31",{"name":5,"class":6},1]