A comparison of hip stems with different proximal design (collared or collarless) in 1-stage total hip arthroplasty.

A comparison of hip stems with different proximal design (collared or collarless) in 1-stage total hip arthroplasty. - A comparison of collared or collarless stem in total hip arthroplasty.

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000028757

Enrollment

Registered

2017-09-30

Start date

2017-11-29

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Osteoarthritis of the hip

Interventions

A stem with different design is used for one side in bilateral simultaneous total hip arthroplasty. A stem with different design is used for one side in bilateral simultaneous total hip arthroplasty.

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Patients who will be performed bilateral total hip arthroplasty for hip disorders.

Exclusion criteria

Exclusion criteria: 1) Hip implant is limited by the bone morphology. 2) Patients who will not agree to this study. 3) Patients who have severe complications intraoperatively or postoperatively. 4) Intraoperative change of the implants. 5) Patients lacking ability of self-assessment due to dementia etc. 6) Minor patients.

Design outcomes

Primary

Measure	Time frame
Physical and radiographic findings at 3 and 6 months, 1, 3, 5, 10, 15, and 20 years postoperatively.	—

Countries

Japan

Contacts

Public ContactKazumasa Miyatake

Tokyo Medical and Dental University Department of Orthopaedics

miyatake.orj@tmd.ac.jp+81358034675

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026