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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT02047292
Other study ID # IORDePuyD57613
Secondary ID
Status Completed
Phase N/A
First received
Last updated
Start date January 2014
Est. completion date December 21, 2017

Study information

Verified date February 2020
Source Istituto Ortopedico Rizzoli
Contact n/a
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

Pain and reduced function are the most common symptoms of coxarthritis. Pain relief and normal range of motion (ROM) restoration are the objectives of a Total Hip Arthroplasty (THA) procedure. It is recognized that increased head-neck ratio results in increased ROM due to the fact that prosthetic impingement between neck and acetabular liner occurs with wider arcs of motion. This head-neck ratio has been investigated extensively only in vitro (on cadavers or sawbones) or using mathematical modeling in computer simulations. These studies are limited by the lack of soft tissues and muscle activations in the models. This study will clinically assess the effect of prosthetic head diameter on patient capability of performing movements which require extreme arcs of motion of the hip joint. Therefore, the research questions are:

- What role do soft tissues play in limiting ROM?

- Can prosthetic impingement really occur in a well positioned THA?

- Can a bigger head diameter alone reduce the risk of impingement?


Description:

This will be a prospective comparative randomized double-blind Study (both patient and the clinical engineer performing the gait analysis will be blind with respect to the prosthetic head diameter implanted). Patient recruitment will last 12 months and the Study will have a follow-up period of 12 months. A total number of 45 patients will be recruited. Patients will be randomly allocated into three groups: the first group will undergo THA with a 28mm diameter head (Pinnacle Acetabular System, with a ceramic on ceramic - CoC - bearing), in the second group THA will be performed using a 36 mm diameter head (DeltaMotion), finally patients in the third group will undergo THA with a 40 mm diameter head (DeltaMotion). Patients will be operated by three surgeons of the same hospital according to the same surgical procedure and using the same direct lateral approach. All patients will receive a Corail stem and will follow the same rehabilitation program.

- Primary endpoint: Gait analysis and fluoroscopy will provide quantitative information of prosthesis in vivo performance, e.g. what is the arc (degrees) of active or passive motion when prosthetic impingement occurs?

- Secondary endpoint(s): these analyses will also allow to: 1) assess ROM of the operated hip versus contralateral non operated hip and the effect of prosthetic head diameter and any correlation to hip functional scores validated and commonly used in the Literature; 2) set reproducible criteria for in vivo fluoroscopic analysis of ROM in THA patients.


Recruitment information / eligibility

Status Completed
Enrollment 30
Est. completion date December 21, 2017
Est. primary completion date February 2016
Accepts healthy volunteers No
Gender All
Age group 35 Years to 55 Years
Eligibility Inclusion Criteria:

- Patients with unilateral primary or secondary hip arthrosis indicated for THA;

- Men and female, age between 35 and 55 years old;

- BMI smaller than 30;

- Patients able to understand the protocol and to sign the informed consent.

Exclusion Criteria:

- Child-bearing female;

- Patients with also controlateral hip arthritis;

- Neurological patients, because of possible alteration of neuro-muscular control of the replaced hip;

- Patients treated with joint replacement at any other lower limb articulation

Study Design


Related Conditions & MeSH terms


Intervention

Device:
THA Corail PinnacleCoC28
Uncemented THA with Corail stem and Pinnacle acetabular cup with CoC 28 mm head
THA Corail DeltaMotion36
Uncemented THA with Corail stem and DeltaMotion acetabular cup with 36 mm head
THA Corail DeltaMotion40
Uncemented THA with Corail stem and DeltaMotion acetabular cup with 40 mm head

Locations

Country Name City State
Italy Istituto Ortopedico Rizzoli Bologna BO

Sponsors (2)

Lead Sponsor Collaborator
Istituto Ortopedico Rizzoli DePuy International

Country where clinical trial is conducted

Italy, 

Outcome

Type Measure Description Time frame Safety issue
Primary Number of Participants and Hip Joint Positions with the Occurrence of Implant Impingement Three-dimension videofluoroscopy is used to calculate prosthesis component relative pose, and to estimate minimum distance at the areas of risk of impingement 12 months
Primary Number of Participants with Functional Deficits at the Hip Joint as Measured by Gait Analysis Three-dimension kinematics and kinetics of the trunk, pelvis and lower limb joints is used during level walking and other motor tasks, as well as for the single exercises of hip joint extreme motion analyzed in videofluoroscopy, to assess thoroughly those patients with and without impingement. 12 months
Secondary Range of Motion of the operated hip versus contralateral non-operated hip Standard clinical range of motion at the two hips 12 months
Secondary Correlations between prosthetic head diameter and hip functional scores The effect of prosthetic head diameter and any correlation to hip functional scores validated and commonly used in the Literature 12 months
Secondary Standard Clinical Hip Scores Outcomes: Harris Hip Score, Oxford Hip Score, WOMAC, Forgotten Joint score and UCLA activity score will be assessed and recorded pre-operatively and post-operatively at one year after surgery. pre-op, and 12 months
Secondary X-ray measurements Radiographic assessment will also be performed at one year after surgery to assess implant position and osteointegration 12 months
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