Evaluation of the Positioning of the Dynacup Cup "One C" Versus "Standard Dynacup" (DYNACUP)

Groupe Hospitalier Diaconesses Croix Saint-Simon

Status

Completed

Conditions

Hip

Arthropathy

Treatments

Other: Randomisation Standard Dynacup or Dynacup One C

Study type

Interventional

Funder types

Other

Identifiers

NCT06053060

ID RCB : 2020-A02843-36

Details and patient eligibility

About

The ceramic-ceramic friction pair is widely used today in total hip arthroplasty, including fourth-generation ceramics which show the lowest wear rate. These have considerably reduced the risk of head fracture compared to previous generations; however, the risk of insert rupture persists with rates similar to those of third generation ceramics.

These ceramic fractures require complex revision surgery, which brings complications, exposing patients to the risk of third-body wear and tear related to persistent post-surgical debris. They are frequently due to an incorrect assembly of the ceramic causing intraoperative or early postoperative rupture. To fix this, manufacturers have developed pre-assembled cups in the factory. The Dynacup One C cup developed by Corin® corresponds to the pre-assembled version of the Dynacup cup, making it possible to eliminate the risk of anomaly during intraoperative assembly linked to the human factor and to offer patients with very small cups an adapted ceramic implant. A single study with a small sample compared the two implants (pre-assembled version [vs] modular version) clinically, radiologically and functionally without showing any significant difference. The lack of data in the literature comparing these two implants motivated us to conduct a randomized comparative study on a large sample of patients.

Full description

Patients eligible for a total hip arthroplasty with a ceramic-ceramic friction couple and scheduled for surgery will be included in this study after information and collection of written consent.

After randomization, a preoperative radiograph with a calibration ball will be taken to plan the prosthesis and identify the characteristics of the operated hip.

An x-ray of the pelvis with a 28 mm ball will be carried out the day after the intervention according to the same preoperative procedures in order to measure the postoperative radiographic parameters.

Enrollment

300 patients

Sex

All

Ages

18+ years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Adult man and woman > 18 years old
Indication for hip arthroplasty with a Dynacup One C or standard Dynacup cup
Patient informed of the study and signed a consent form

Exclusion criteria

Refusal to participate in the study
Indication of a friction couple other than ceramic-ceramic
Contraindication or the technical impossibility of implanting an impacted acetabular component
Pregnant or breastfeeding women.
Minor patients aged < 18 years
Subjects not affiliated to the national health insurance or to an equivalent insurance