Does leaving the hip joint capsule in place during the implantation of a hip prosthesis lead to better functional results?

Comparison of clinical outcome with or without retention of the joint capsule in total hip arthroplasty for treatment of end-stage arthritis

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN35043165

Enrollment

100

Registered

2021-02-12

Start date

2024-06-01

Completion date

Unknown

Last updated

2026-03-23

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

Conditions

End-stage osteoarthritis of the hip joint Musculoskeletal Diseases Coxarthrosis [arthrosis of hip]

Interventions

Radiographic examinations of the hip joint will be performed according to the standard procedures for total hip arthroplasty (conventional ap pelvis view and hip cross-table lateral view for pre-opera

Eligibility

Sex/Gender

All

Age

18 Years to 100 Years

Inclusion criteria

Inclusion criteria: 1. End-stage primary osteoarthritis 2. Age 18 years and older 3. Indication for total hip arthroplasty 4. Direct anterior approach 5. Use of standard implants

Exclusion criteria

Exclusion criteria: 1. Secondary causes of osteoarthritis (e.g. fracture, dysplasia, deformities etc) 2. Prior surgery to the hip joint 3. Inability to follow the procedures of the study, e.g. due to language problems, psychological disorders, dementia, etc. 4. Patients with mental disorders or medical conditions with disturbance of balance, rendering them unable to participate in the physical tests 5. Lack of written consent or refusal to participate 6. Pregnant or lactating women 7. Use of revision implants 8. Contraindications for the use of direct anterior approach (severe obesity, infections or injury to the skin anterior to the hip) 9. Contralateral total hip arthroplasty within the last 12 months 10. Hip joint capsule that cannot be retained for medical or technical reasons until after final positioning of the implants

Design outcomes

Primary

Measure	Time frame
Proprioceptive function of the hip is measured as the ability of the patient to accurately control joint motion: deviations to reproduce a given position of the leg in space are measured in degrees at baseline, 6 and 12 weeks	—

Secondary

Measure	Time frame
1. Functional outcome measured using Harris Hip Score (HHS), Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), Merle d’Aubigné and Postel Score (MdA), Hip disability and Osteoarthritis Outcome Score (HOOS) at baseline, 6 weeks, 12 weeks, 12 months 2. Evaluation of component placement measured using conventional ap pelvis x-ray at 2 days, 6 weeks and 12 months 3. Infection rate and rate of dislocations measured using patient history at 12 months	—

Measure

Time frame

1. Functional outcome measured using Harris Hip Score (HHS), Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), Merle d’Aubigné and Postel Score (MdA), Hip disability and Osteoarthritis Outcome Score (HOOS) at baseline, 6 weeks, 12 weeks, 12 months 2. Evaluation of component placement measured using conventional ap pelvis x-ray at 2 days, 6 weeks and 12 months 3. Infection rate and rate of dislocations measured using patient history at 12 months

—

Countries

Switzerland

Contacts

Public ContactLorenz Büchler

lorenz.buechler@ksa.ch+41 (0)62 838 96 06

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Apr 3, 2026