A Post Market Surveillance Study About the MONOCER Cup

Study Overview
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Brief Summary
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Over the years, the use of large diameter femoral heads has become increasingly common in orthopaedics due to the decreased risk of dislocation due to increased jumping distance and range of motion. The history of total hip arthroplasty does not favour large diameter heads, especially as conventional polyethylene has a high risk of wear. The development of hard-on-hard bearings (CoC) with a second generation ceramic material and the introduction of cross-linked PE have led to the reintroduction of this concept. The Mpact 3D Metal MonoCER cup was developed to offer the advantages of accommodating large diameter heads with an external metal cup with a pre-assembled system that avoids the surgical step of insert-cotile coupling.

Detailed Description
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All patients candidated to receive a total hip arthroplasty under 75 years old, who will receive a Mpact 3D Metal cup will be proposed to take part to the study. They will receive the same treatment in case they will not partecipate; the study is an observational study according to standard practice. The study aim to assess the long term peformance of the cup at 10 years after surgery. The patients will be visited at 6 months, 1, 5 and 10 years after surgery.

Official Title
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Monocer Cup: Open, Prospective, Multicentric, Non Randomised Observational Study

Conditions
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Total Hip Arthroplasty

Intervention / Treatment
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* Device: Mpact 3D metal MONOCER cup


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients undergoing total hip arthroplasty who will receive the Mpact 3D Metal MonoCER acetabular component according to the instructions for use Patients who have signed the informed consent to participate in the study Exclusion Criteria: Minor patients, patients over 75 years of age at the time of primary surgery; Any patient who is unable or unwilling to give informed consent to participate in the study.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 75 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Intervention/Treatment |
| --- |
|Device: Mpact 3D metal MONOCER cup|adult patients requiring a total hip arthroplasty under 75 years old, will receive the Mpact 3D metal cup, as acetabular sheel device implanted|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Assessment of implant survivorship using Kaplan Meier curve | a Kaplan Meir survival curve will be calcuated | 10 years | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Assessment of Device stability throught a radiological exam | standard x-ray examination will be peformed during the visits | 6 months, 1 year, 5 and 10 years | 
| Assessment of the clinical outcome following total hip replacement using the Harris Hip score | HHS score will be completed | 6 months, 1 year, 5 and 10 years | 
| Device Safety assessed through adverse event collection | number of adverse event occurred | up to 10 yrs follow-up |