Accuracy of obtaining optimal base plate declination in reverse shoulder arthroplasty JSES
In this paper the authors describe a method for measuring the inclination/declination of the glenoid in relation to a reference line from the superior medial angle of the scapula to the superior margin of the glenoid. Unfortunately this reference line is not accessible in the OR. We note that there are a number of different references for measuring glenoid inclination and that the reference framework for the 'conventional wisdom' that the ideal position for the baseplate include 15 degrees of declination is not clear. As the authors point out, the reference cannot be the inconsistent orientation of the face of the preoperative glenoid, which in their study varied from -27 to + 28 degrees. Even in their experienced hands, the postoperative inclination of the baseplate varied widely from -23 to 44 degrees.
In our approach, we are less concerned about declination and more concerned about the superior/inferior position of the glenoid, the freedom from contact between the adducted humeral component and the scapula, and preserving quality bone on which the baseplate can be placed, recognizing that in prior studies, we have shown that the quality of bone on which the base plate is placed may be a critical determinant of the strength of fixation. Thus one must be cautious about reaming away bone of good quality to achieve a desired declination.
----
If you have suggestions for topics you'd like us to address in this blog, please send an email to
shoulderarthritis@uw.edu
Use the "Topics" box to the right to find other posts of interest to you.
You may be interested in some of our most visited web pages including:shoulder arthritis, total shoulder, ream and run, reverse total shoulder, CTA arthroplasty, and rotator cuff surgery.
See the countries from which our readers come on this post.
Popular Posts
- ChatGPT, the shoulder arthritis blog, and me
- Artificial intelligence will facilitate clinically important shoulder arthroplasty research
- Smoking and the Iowa Gambling Task
- The pilot/the surgeon is the method
- Ream and Run - the rehab program
- Does postoperative glenoid version matter in anatomic total shoulder arthroplasty? The jury is in.
- Chondrolysis - the cases keep on coming
- Our orthopaedic judgment is flawed by noise
- Osteoporosis is a common risk factor for patients having shoulder arthroplasty
- What type of rTSA should I use and how should I position it? Insights from 13 Recent Studies On Prosthesis and Position