2002 - University of Washington Bone and Joint Sources

Predicted
50
45
40
35
30
25
20
15
10
5
0
0 2 0 4 0 6 0
Calculated
Reamed 25.0
Reamed 22.5
Figure 7: Plot of calculated vs predicted BSA in degrees in the anterior and posterior directions.
Direction
(degrees)
0
45
90
135
180
225
270
315
Native
31.3
24.5
21.9
28.4
32.1
28.8
23.9
25.4
Average BSAs (degrees)
Ream Ream Global
Denuded
*
25.0
** 22.5
+
44
++
29.1 34.8 40.6 36.3
25.8
17.9
23.0
23.3
18.5
14.1
20.2
30.4
27.2
32.6
32.2
28.4
24.8
31.6
36.5
33.2
38.0
37.3
34.8
32.5
35.4
31.9
25.8
31.9
36.2
31.2
25.3
31.2
direction of humeral head
displacement in glenohumeral arthritis.
CLINICAL RELEVANCE
Non-prosthetic glenoid
arthroplasty through spherical reaming
can achieve surface geometry and
intrinsic stability similar to that of
normal glenoids and that provided by
a polyethylene glenoid.
RECOMMENDED READING
Levine, W. N., Djurasovic, M., Glasson,
J. M., Pollock, R. G., Flatow, E. L., and
Bigliani, L. U. Hemiarthroplasty for
glenohumeral osteoarthritis: results
correlated to degree of glenoid wear. J
Shoulder Elbow Surg 6 (5): 449-54,
1997.
Matsen, F. A., Lippitt, S. B., Sidles, J. A.,
and Harryman, D. T. “Practical
Evaluation and Management of the
Shoulder.” W.B. Saunders Company,
Philadelphia, 1994.
* -significantly less than Native (p