Standard 135 degree reverse polyethylene insert combined with a neutral humeral stem in satisfactory coronal canal position
The stem in neutral coronal canal position, the reverse standard polyethylene insert is medialized and overlapping the medial calcar
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the humeral stem must be placed in the canal in a lateralized position to achieve neutral polyethylene position
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- a medial stem and neutral polyethylene insert may
The coronal position of the stem may not be controlled especially in stemless and short stemmed implants.
In the ' at risk' patient:
A high neck cut and varus stem may result in acromial stress fracture.
A combined lateralized glenosphere and humerus may result in acromial stress fracture.
A modular inlay stem may be helpful
- increase medial COR,
- lateralize the stem;
- overstuff the joint
- tighter reduction
- medial calcar fracture
- increase deltoid wrap
The coronal position of the stem may not be controlled especially in stemless and short stemmed implants.
In the ' at risk' patient:
A high neck cut and varus stem may result in acromial stress fracture.
A combined lateralized glenosphere and humerus may result in acromial stress fracture.
A modular inlay stem may be helpful
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