Optimys Femoral Stem for Total Hip Replacement

Study Overview
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Brief Summary
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This retrospective observational study analyses the surgical performance, clinical and radiologic outcome as well as the rate of infections with a main focus on revision surgeries after primary implantation of the Optimys short stem femoral prosthesis.

Official Title
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Optimys Femoral Stem for Total Hip Replacement - a Clinical and Radiologic Follow-up of Minimum One Year

Conditions
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Short Stem Prosthesis, Optimys Femoral Stem

Intervention / Treatment
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* Other: retrospective analysis of surgical performance, clinical and radiologic outcome


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients treated with an Optimys femoral component at the University Hospital Basel between 29.10.2013 and 29.10.2018 Exclusion Criteria: Clinical follow up at another Institution Documented dissent in study participation

Ages Eligible for Study
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Minimum Age: 18 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 |
| --- |
|Other: retrospective analysis of surgical performance, clinical and radiologic outcome|retrospective analysis of surgical performance, clinical and radiologic outcome|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| rate of reoperations | rate of reoperations after primary implantation of the Optimys short stem prosthesis | one year follow-up period after Optimys femoral stem surgery | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| rate of cortical hypertrophy | rate of cortical hypertrophy | at one year follow-up after Optimys femoral stem surgery | 
| rate of fractures | rate of fractures after the implantation of short stem femoral implants | one year follow-up period after Optimys femoral stem surgery | 
| rate of infections | rate of infections after the implantation of short stem femoral implants | one year follow-up period after Optimys femoral stem surgery | 
| anatomic alignment on anterior-posterior (ap) view in Degree° | radiologic outcome defined by preciseness of the anatomic alignment compared to the contralateral side | at one year follow-up after Optimys femoral stem surgery | 
| subsidence | radiologic outcome defined by rate of subsidence after the implantation of short stem femoral implants (mm) | at one year follow-up after Optimys femoral stem surgery | 
| pain at rest (yes/no) | clinical outcome defined by pain at rest (yes/no) | at one year follow-up after Optimys femoral stem surgery | 
| pain under stress (yes/no) | clinical outcome defined by pain under stress (yes/no) | at one year follow-up after Optimys femoral stem surgery | 
| use of analgetics (yes/no) | clinical outcome defined by use of analgetics (yes/no) | at one year follow-up after Optimys femoral stem surgery | 
| use of walking aids | clinical outcome defined by use of walking aids | at one year follow-up after Optimys femoral stem surgery | 
| extent of periarticular ossification (PAO) according to Brooker classification system | Brooker classification system divides severity of PAO into 4 types: A: islands of bone within the soft tissues about the hip B: bone spurs originating from the pelvis or proximal end of the femur, leaving at least 1 cm between opposing bone surfaces C: bone spurs originating from the pelvis or proximal end of the femur, reducing the space between opposing bone surfaces to less than 1 cm D: bone ankylosis of the hip | at one year follow-up after Optimys femoral stem surgery | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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total hip replacement