Podcast
Questions and Answers
The MOINA shoulder arthroplasty is specifically designed to address which of the following conditions?
The MOINA shoulder arthroplasty is specifically designed to address which of the following conditions?
- Osteoarthritis of the knee
- Ankle impingement
- Rotator cuff tear arthropathy (correct)
- Hip dysplasia
What does 'monobloc' refer to in the context of the MOINA shoulder prosthesis?
What does 'monobloc' refer to in the context of the MOINA shoulder prosthesis?
- An integrated design where the glenoid and humeral components are a single unit (correct)
- The use of a single type of bone cement
- A surgical technique involving only one incision
- A modular system allowing interchangeability of components
The MOINA prosthesis aims to restore shoulder function by primarily doing what?
The MOINA prosthesis aims to restore shoulder function by primarily doing what?
- Medializing and distalizing the center of rotation (correct)
- Increasing joint space and reducing bone density
- Lengthening the humerus and increasing muscle strength
- Lateralizing the glenoid and proximalizing the humerus
Which of the following materials is used to manufacture the MOINA shoulder prosthesis?
Which of the following materials is used to manufacture the MOINA shoulder prosthesis?
Why does the glenoid component of the MOINA prosthesis have a porous coating?
Why does the glenoid component of the MOINA prosthesis have a porous coating?
A surgeon is preparing to implant the MOINA shoulder prosthesis. What does the surgical technique involve?
A surgeon is preparing to implant the MOINA shoulder prosthesis. What does the surgical technique involve?
In which of the following scenarios would the MOINA shoulder be an appropriate option?
In which of the following scenarios would the MOINA shoulder be an appropriate option?
Which of the following is a contraindication for using the MOINA shoulder prosthesis?
Which of the following is a contraindication for using the MOINA shoulder prosthesis?
What is a key advantage of using cementless fixation in the MOINA shoulder arthroplasty?
What is a key advantage of using cementless fixation in the MOINA shoulder arthroplasty?
What potential complication is associated with the MOINA shoulder, where the humeral component impinges on the scapula?
What potential complication is associated with the MOINA shoulder, where the humeral component impinges on the scapula?
What does postoperative rehabilitation for a MOINA shoulder typically involve initially?
What does postoperative rehabilitation for a MOINA shoulder typically involve initially?
What has been generally observed regarding patient satisfaction rates following MOINA shoulder arthroplasty?
What has been generally observed regarding patient satisfaction rates following MOINA shoulder arthroplasty?
What is a potential limitation regarding revision options if the MOINA prosthesis fails?
What is a potential limitation regarding revision options if the MOINA prosthesis fails?
Besides rotator cuff tear arthropathy, for what other condition might a MOINA shoulder arthroplasty be considered?
Besides rotator cuff tear arthropathy, for what other condition might a MOINA shoulder arthroplasty be considered?
What is the primary reason for using additional fixation screws during MOINA shoulder implantation?
What is the primary reason for using additional fixation screws during MOINA shoulder implantation?
In postoperative rehabilitation, when are strengthening exercises typically introduced after MOINA shoulder arthroplasty?
In postoperative rehabilitation, when are strengthening exercises typically introduced after MOINA shoulder arthroplasty?
What aspect of the MOINA shoulder prosthesis is still undergoing evaluation to determine its effectiveness?
What aspect of the MOINA shoulder prosthesis is still undergoing evaluation to determine its effectiveness?
The MOINA shoulder is an example of what type of shoulder arthroplasty?
The MOINA shoulder is an example of what type of shoulder arthroplasty?
What is the potential consequence of insufficient bone stock in a patient being considered for MOINA shoulder arthroplasty?
What is the potential consequence of insufficient bone stock in a patient being considered for MOINA shoulder arthroplasty?
Which of the following is a reason why the MOINA shoulder prosthesis simplifies the surgical technique compared to some other designs?
Which of the following is a reason why the MOINA shoulder prosthesis simplifies the surgical technique compared to some other designs?
What key factor determines the specific physical therapy protocols used after MOINA shoulder arthroplasty?
What key factor determines the specific physical therapy protocols used after MOINA shoulder arthroplasty?
The MOINA shoulder is designed and manufactured in which country?
The MOINA shoulder is designed and manufactured in which country?
What is the main goal of medializing and distalizing the center of rotation in the MOINA prosthesis design?
What is the main goal of medializing and distalizing the center of rotation in the MOINA prosthesis design?
What should be ensured in a patient that is being considered for MOINA shoulder replacement to avoid complications?
What should be ensured in a patient that is being considered for MOINA shoulder replacement to avoid complications?
What is the primary purpose of press-fitting the MOINA prosthesis into place during surgical implantation?
What is the primary purpose of press-fitting the MOINA prosthesis into place during surgical implantation?
In what situation can the MOINA shoulder be used in addition to cases of rotator cuff tear arthropathy and failed shoulder replacement.
In what situation can the MOINA shoulder be used in addition to cases of rotator cuff tear arthropathy and failed shoulder replacement.
What potential issue is addressed by the MOINA shoulder design?
What potential issue is addressed by the MOINA shoulder design?
What potential risk is associated with any shoulder arthroplasty, including the MOINA shoulder?
What potential risk is associated with any shoulder arthroplasty, including the MOINA shoulder?
What is the typical order of recovery exercises after MOINA shoulder arthroplasty?
What is the typical order of recovery exercises after MOINA shoulder arthroplasty?
What is the purpose of removing bone to create a flat surface on the glenoid during surgical implantation of the MOINA shoulder?
What is the purpose of removing bone to create a flat surface on the glenoid during surgical implantation of the MOINA shoulder?
What is the purpose of preparing the humeral canal to accept the stem of the prosthesis in the MOINA shoulder procedure?
What is the purpose of preparing the humeral canal to accept the stem of the prosthesis in the MOINA shoulder procedure?
What situation would make a patient not suitable for the MOINA shoulder replacement?
What situation would make a patient not suitable for the MOINA shoulder replacement?
Which is an advantage of the MOINA shoulder replacement?
Which is an advantage of the MOINA shoulder replacement?
What is a situation where the MOINA shoulder helps?
What is a situation where the MOINA shoulder helps?
What is the meaning of the acronym MOINA?
What is the meaning of the acronym MOINA?
What happens during rehabilitation after the shoulder arthroplasty?
What happens during rehabilitation after the shoulder arthroplasty?
Which component is typically affected by a porous coating by the MOINA shoulder?
Which component is typically affected by a porous coating by the MOINA shoulder?
If a doctor does not prefer a certain physical therapy protocol, what happens?
If a doctor does not prefer a certain physical therapy protocol, what happens?
A patient with rotator cuff tear arthropathy also presents with glenohumeral instability. How would the MOINA prosthesis address both conditions?
A patient with rotator cuff tear arthropathy also presents with glenohumeral instability. How would the MOINA prosthesis address both conditions?
A patient undergoing MOINA shoulder arthroplasty has limited bone stock. Which surgical modification might be necessary to ensure successful implantation?
A patient undergoing MOINA shoulder arthroplasty has limited bone stock. Which surgical modification might be necessary to ensure successful implantation?
Postoperatively, a patient who underwent MOINA shoulder arthroplasty is experiencing scapular notching. What is the most likely cause?
Postoperatively, a patient who underwent MOINA shoulder arthroplasty is experiencing scapular notching. What is the most likely cause?
A surgeon is planning a revision surgery for a patient with a failed MOINA shoulder arthroplasty. What is an important consideration regarding revision options?
A surgeon is planning a revision surgery for a patient with a failed MOINA shoulder arthroplasty. What is an important consideration regarding revision options?
What is the primary advantage of the MOINA prosthesis's cementless fixation method compared to a cemented approach?
What is the primary advantage of the MOINA prosthesis's cementless fixation method compared to a cemented approach?
Flashcards
What is the MOINA shoulder?
What is the MOINA shoulder?
A type of shoulder arthroplasty used in shoulder replacement surgery.
What does MOINA stand for?
What does MOINA stand for?
Monobloc Inverse Novedades Argentinas. It refers to the design and origin of the prosthesis.
What kind of prosthesis is MOINA?
What kind of prosthesis is MOINA?
It's an uncemented, inverse shoulder arthroplasty prosthesis, meaning it doesn't use cement and reverses the typical joint mechanics.
What conditions does the MOINA shoulder treat?
What conditions does the MOINA shoulder treat?
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What is the 'monobloc' design?
What is the 'monobloc' design?
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What material is the MOINA prosthesis made from?
What material is the MOINA prosthesis made from?
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What is the purpose of the porous coating?
What is the purpose of the porous coating?
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What is the design philosophy of MOINA?
What is the design philosophy of MOINA?
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How are the glenoid and humerus prepared?
How are the glenoid and humerus prepared?
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How is the prosthesis fixed in place?
How is the prosthesis fixed in place?
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When is the MOINA shoulder indicated?
When is the MOINA shoulder indicated?
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When is the MOINA shoulder NOT recommended?
When is the MOINA shoulder NOT recommended?
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What are the advantages of the MOINA shoulder?
What are the advantages of the MOINA shoulder?
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What are the disadvantages of the MOINA shoulder?
What are the disadvantages of the MOINA shoulder?
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What does rehabilitation involve?
What does rehabilitation involve?
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What are the outcomes?
What are the outcomes?
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What is Scapular notching?
What is Scapular notching?
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Study Notes
- The MOINA shoulder is a type of shoulder arthroplasty used in shoulder replacement surgery.
- MOINA stands for Monobloc Inverse Novedades Argentinas.
- It's an uncemented, inverse shoulder arthroplasty prosthesis.
- It's designed and manufactured in Argentina.
- It is used to treat conditions like rotator cuff tear arthropathy.
Design and Components
- The MOINA prosthesis is a "monobloc" design, meaning the glenoid and humeral components are integrated into a single unit.
- It is made from titanium alloy.
- The glenoid component has a porous coating to allow for bone ingrowth and biological fixation.
- The humeral component articulates with the glenoid component, providing stability.
- The design philosophy aims to restore shoulder function by medializing and distalizing the center of rotation.
Surgical Technique
- Surgical implantation involves preparing the glenoid and humerus to receive the prosthesis.
- Bone is removed to create a flat surface on the glenoid.
- The humeral canal is prepared to accept the stem of the prosthesis.
- The prosthesis is then press-fit into place.
- Additional fixation screws may be used in some cases to enhance stability.
Indications
- The MOINA shoulder is primarily indicated for rotator cuff tear arthropathy.
- It can also be used in cases of failed shoulder replacement.
- Other indications include complex proximal humerus fractures and glenohumeral arthritis with rotator cuff deficiency.
Contraindications
- Active infection.
- Insufficient bone stock.
- Neuromuscular disorders that compromise shoulder function.
- Patient non-compliance.
Advantages
- Cementless fixation promotes long-term implant stability.
- The monobloc design simplifies the surgical technique.
- It restores range of motion.
- Addresses glenohumeral instability.
Disadvantages
- As with any shoulder arthroplasty, there are risks of infection, dislocation, and nerve injury.
- Scapular notching can occur if the humeral component impinges on the scapula.
- Limited options for revision if the prosthesis fails.
Postoperative Rehabilitation
- Rehabilitation is a crucial part of the recovery process.
- It typically involves a period of immobilization followed by progressive range-of-motion exercises.
- Strengthening exercises are gradually introduced to improve shoulder function.
- Physical therapy protocols vary depending on the individual patient and the surgeon's preference.
Outcomes
- Studies have reported positive outcomes with the MOINA shoulder in terms of pain relief and improved function.
- Patient satisfaction rates are generally high.
- The long-term survival rate of the prosthesis is still being evaluated.
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