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NCT Number: NCT06885359

CoCrMo LOCK Bipolar Femoral Heads FU

Study design: monocentric, retrospective, observational and post-market clinical study.

Purpose: To demonstrate the safety and performance of CoCrMo LOCK bipolar femoral heads. The eligible study population is represented by the entire population that underwent a hip replacement with CoCrMo LOCK bipolar femoral heads from 1st January 2023 onwards at the site in accordance with the indication for use of the product.

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Key information

Conditions

Femoral Fractures Fractures, Bone Hip Arthropathy Leg Injuries Wounds and Injuries

Age range

18 year and older

Sex eligibility

All sexes

Study type

Observational

Primary location

About this study

The study is aiming to demoranstrate safety and performance of LOCK Bipolar femoral heads and will do it by considering the rate of revision of any prosthesis component and dislocation, by x-ray evaluation, by patient reported outcomes and walking/residential status. Patients are followed for 2 years after hemiarthroplasty and data are collected at 6 timepoints (pre-operative, intra-operative, at discharge, 4-months follow up, 12 months follow up and 24 months follow up).

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Displaced intracapsular hip fracture (Garden III-IV).
  • Subjects underwent a Bipolar Hemiarthroplasty with a CoCrMo LOCK Bipolar femoral head as per their Indication For Use from January 1st, 2023, onwards.
  • No concurrent joint disease at the time of the surgery.
  • Absence of severe cognitive dysfunction demonstrated by 3 or more correct answers on the Pfeiffer test.
  • Ability to ambulate independently with or without walking aids before surgery.
  • Subject willingness to participate.

Exclusion criteria

  • Undisplaced or minimally displaced intracapsular hip fracture (Garden I-II).
  • Any CoCrMo LOCK Bipolar femoral head contraindication for use as reported in the current Instruction For Use.
  • Pathological fracture secondary to malignant disease.
  • Subjects with rheumatoid arthritis or symptomatic osteoarthritis.
  • Previous treatment to the same hip for a fracture at the time of the surgery.
  • Subjects who were deemed unsuitable for the surgical procedures by the anesthesiologist.
  • Severe cognitive dysfunction or cognitive impairment demonstrated by 2 or less correct answers on the Pfeiffer test.
  • Unable to walk before surgery (e.g., wheelchair or bed-ridden subjects).

Treatment and study plan

Primary outcomes

  1. Evaluation of the revision rate of CoCrMo LOCK Bipolar femoral heads at 24 months after surgery.

    Time frame: At 24 months after intraoperative visit

Secondary outcomes

  1. Evaluation of the dislocation rate (including close reduction) in subjects with CoCrMo LOCK Bipolar femoral heads at 24 months after bipolar hemiarthroplasty

    Time frame: At 24 months after intraoperative visit

  2. Evaluation of the revision incidence of any hip component for any reason at 24 months after bipolar hemiarthroplasty.

    Time frame: At 24 months after intraoperative visit

  3. Evaluation of acetabular erosion (according to Baker classification) in subjects with CoCrMo LOCK Bipolar femoral heads at 12 months after Bipolar Hemiarthroplasty.

    Time frame: At 12 months after intraoperative visit

  4. Assessment of Harris Hip Score (HHS) at 24 months after Bipolar Hemiarthroplasty with CoCrMo LOCK Bipolar femoral heads.

    Time frame: At 24 months after intraoperative visit

    The Harris Hip Score goes from 0 to 100, which is the best result.

  5. Assessment of Oxford Hip Score (OHS) completed by subjects with CoCrMo LOCK Bipolar femoral heads at 24 months after Bipolar Hemiarthroplasty.

    Time frame: At 24 months after intraoperative visit

    The Oxford Hip Score goes from 0 to 48, with 48 being the best outcome

  6. Assessment of Pain Likert-scale in subjects with CoCrMo LOCK Bipolar femoral heads at 24 months after Bipolar Hemiarthroplasty.

    Time frame: At 24 months after intraoperative visit

    The pain Likert-scale is a 6-point scale: - severe and spontaneous - severe when walking - tollerable - occurs after activity - light intermittent - no pain

  7. Comparison between pre-operative and 4-month walking ability.

    Time frame: Performed at preoperative visit and 4months follow up visit

    Functional evaluation

    At the pre-operative time-point, the ability to walk is categorized in:

    • "able to walk without aids",
    • "able to walk using one walking aid",
    • "able to walk using two walking aids",
    • "able to walk using the walking frame"
    • "unable to walk" (wheelchair or bed-ridden subjects)

    At the 4-month post-operative time-point, the ability to walk is investigated is categorized in:

    • "maintained" (if the subject is able to walk independently as before, with aids if necessary)
    • "not maintained" (if the subject needs support from another person or uses a wheelchair or is bed-ridden)

  8. Comparison between pre-operative and 4-month residential status.

    Time frame: Performed at preoperative visit and 4months follow up visit

    Daily habit

    At pre-operative timepoint, subjects are categorized as subjects that before the fracture were used to live:

    • at their own home (alone or with assistance),
    • in a sheltered home for independent people,
    • in a nursing home for people who need assistance with personal care.

    At 4-month post-operative timepoint, the residential status is categorised in:

    • maintained (if the subject is living in the same dwelling as before fracture),
    • not maintained (if the subject moved to a sheltered accommodation or a nursing home)

Study contacts

Contact information is provided by the study sponsor or research team.

Francesca Citossi

CONTACT

[email protected]

+39 0432 945511

Monica Novello

CONTACT

[email protected]

3358162087

Sponsors and collaborators

Lead sponsor

Limacorporate S.p.a

Industry

Registry information

Official study title

A Post-market Study Evaluating Clinical and Safety Outcomes of Bipolar Hemiarthroplasty Using CoCrMo LOCK Bipolar Femoral Heads in Subjects With Hip Fracture

Important dates

Study start
2026
Primary completion
2028
Study completion
2028
First posted
Mar 20, 2025
Registry last updated
Jul 7, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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