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Fixation of the Simpliciti stemless humeral component, a radio-steophotogrammatic analysis


- candidate number28174
- NTR NumberNTR6809
- ISRCTNISRCTN no longer applicable
- Date ISRCTN created
- date ISRCTN requested
- Date Registered NTR10-nov-2017
- Secondary IDs13-092 METC Zuidwest Holland
- Public TitleFixation of the Simpliciti stemless humeral component, a radio-steophotogrammatic analysis
- Scientific TitleFixation of the Simpliciti stemless humeral component, a radio-steophotogrammatic analysis
- ACRONYMSimpliciti RSA
- hypothesisThe Simpliciti stemless humeral component is a stable implant with minimal translation, rotation and micromotion.
- Healt Condition(s) or Problem(s) studiedArthroplasty , Prothesis, Shoulder osteoarthritis
- Inclusion criteriaIn order to be eligible to participate in this study, a subject must meet all of the following criteria:
- Aged 45 years and older.
- Patients willing to participate.
- Speaking and writing Dutch language.
- Patients with either osteoarthritis, traumatic arthritis, rheumatoid arthritis of the glenohumeral joint or necrosis of the humeral head.
- Indication for shoulder replacement (Larsen grade 4 or 5, invalidating pain).
- Patients able to provide written informed consent.
- Exclusion criteriaA potential subject who meets any of the following criteria will be excluded from participation in this study:
- Patients with osteonecrosis (except the necrosis of the humeral head), fractures, (post-)septic arthritis, instability.
- Patients with BMI > 35.
- Any active infection.
- mec approval receivedyes
- multicenter trialno
- randomisedno
- group[default]
- TypeSingle arm
- Studytypeintervention
- planned startdate 1-jan-2014
- planned closingdate1-nov-2019
- Target number of participants25
- InterventionsPlacement of the Simpliciti stemless humeral component prosthesis, with insertion of tantalum beads for radiosteraophotogrammetric analysis (RSA).
- Primary outcomeThe primary outcome is:
- fixation and migration of the Simplicti (Tornier, France) stemless humeral component in vivo using model based radiostereophotogrammetric (mRSA) analysis.
- Secondary outcomeThe secondary parameters are:
- To evaluate the mid and long term clinical results in an on-going follow-up, and correlate the clinical results to the RSA migration data. The clinical results will be measured by: NRS for pain, Range of Motion, Constant Score, SF-12, DASH, Oxford Schoulder Score and radiographs.
- Timepoints- Preoperative
- During hospital stay
- 6 weeks postoperative
- 6 months postoperative
- 1 year postoperative
- 2 years postoperative
- Trial web site
- statusopen: patient inclusion
- CONTACT FOR PUBLIC QUERIES N.M.C. Mathijssen
- CONTACT for SCIENTIFIC QUERIES N.M.C. Mathijssen
- Sponsor/Initiator Reinier de Graaf Groep, Department of Orthopaedic Surgery
- Funding
(Source(s) of Monetary or Material Support)
Tornier, France
- Publications
- Brief summaryRationale:
Shoulder arthroplasty has traditionally been designed as a stemmed device relying on intramedullary fixation for its stability. Unfortunately drawbacks in stemmed arthroplasty devices are caused by stress-shielding, stress risers, fractures and the need for modularity due to variable anatomy. Therefore, in shoulder arthroplasty short stem devices are developed. It has been proven that the fixation of the humeral component is not compromised due to a shorter stem. However, a reduced area of fixation, like the stemless design, can hypothetically show compromised fixation in the initial or long term. To quantify motion of a stemless design Roentgen Stereometric Analysis (RSA) can be used. In this study, we will identify the fixation and migration patterns of the Simpliciti (Tornier, France) stemless humeral component using RSA.

Objective:
Identifying the fixation and migration patterns of the Simpliciti (Tornier, France) stem less humeral component in vivo, using model based radiostereophotogrammetric (mRSA) analysis. Evaluating the short and midterm clinical results (NRS for pain, range of motion, Constant score, SF-12, Dash and radiographs).

Study design:
We will perform a prospective cohort study in which 25 patient from Reinier de Graaf Hospital, Delft, The Netherlands, will be enrolled. Patients will be evaluated preoperatively, during hospital stay within the first week postoperatively, at 6 weeks, 6 months, 1 year and after 2 years.

Study population:
The study population will consist of 25 patients aged 45 years and older, with a BMI<35. The subjects will have no clinical relevant disorders of the shoulder and they will undergo a primary shoulder replacement after diagnosis of osteoarthritis, traumatic osteoarthritis, rheumatoid arthritis or avascular necrosis of the humeral head.

Main study parameters/endpoints:
Outcome will be clinically measured using the NRS for pain, Constant score, Oxford shoulderscore, SF-12 and DASH score, whilst radiographic outcomes will be evaluated through standard radiographic parameters. RSA will be used to measure stem migration.

Nature and extent of the burden and risks associated with participation, benefit and group relatedness: Subjects participating in the study will have the same risks and benefits when not participating in the study. Follow-up times are standard protocol evaluations of the prosthesis. Besides standard follow-up, RSA x-rays will be made to measure the fixation.
- Main changes (audit trail)
- RECORD10-nov-2017 - 30-nov-2017


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