Posterior Shoulder Instability Open ManagementPosterior Shoulder Instability Open Management...
Transcript of Posterior Shoulder Instability Open ManagementPosterior Shoulder Instability Open Management...
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Posterior Shoulder InstabilityOpen Management
Armodios Hatzidakis MD OLC 2009
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Ambiguity of Terminology
• Dislocation vssubluxation
• Traumatic vsatraumatic
• Habitual vsvoluntary vsinvoluntary
FUCHS B. et.al. J Bone Joint Surg2000:82:16-25
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Basic Questions• Is the shoulder unstable? Directions?
• Is the labrum torn?• Is the capsule stretched? Gone?• Is the bony fulcrum adequate
– Glenoid– Humerus: “Locked” dislocation?
• Does the patient have mental reasons to fail?
• Previous surgery?FUCHS B. et.al. J Bone Joint Surg 2000:82:16-25
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Determination of Instability
• History• Clinical examination
– Supine load and shift with comparison to opposite side
– ABER apprehension/Relocation tests
– Posterior jerk test
• Arthroscopic Evaluation
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Labrum/Capsule
• History & exam: – Thermal Capsulorrhaphy
– Hyperlaxity
• MRI/Arthrogram– Labrum
– Posterioinferior pouch
• Arthroscopy
Millett et al, JAAOS 2006
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Osseous Evaluation
• MRI suboptimal
• CT scan best. 2D and 3D recons of glenoid face– Bone loss: Glenoid or humerus
– Posterior rim sloping/Fx
– Excess retroversion/dysplasia
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Psychological Factors• Workman’s Compensation claim
• Psychiatric/emotional disorder– Habitual (psychiatric, willful)
– Voluntary (intentional but not willful)
– Involuntary/unintentional• Hawkins et al, JBJS 1984
• We are not psychiatrists
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Etiology and Treatment
• Detached labrum– Arthroscopic repair
• Capsular tissue stretched– Arthroscopic or open repair/casulorrhaphy
• Inadequate bony fulcrum– McGlaughlin Procedure– Open Glenoid Augmentation
• Inadequate capsular tissue– Open capsular reconstruction, Graft Reinforcement
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Open Capsullorhaphy: Exposure
Matsen: www.orthop.washington.edu
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Exposure
Matsen: www.orthop.washington.edu
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FUCHS B. et.al. J Bone Joint Surg2000:82:16-25
With InfraspinatusRelease
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Neer Humeral Sided Capsular Shift
Courtesy of Gilles Walch
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Posterior Glenoid Deficiency
• Dysplasia– Osteotomy
• Posterior GlenoidRim Loss– Augmentation (“Bone Block”)
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Glenoid Dysplasia:Osteotomy
Matsen: www.orthop.washington.edu
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Glenoid Osteotomy
Matsen: www.orthop.washington.edu
Case Courtesy of Gilles Walch
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Patient Selection/Complications
• Severe hypoplasia
• Perforation of Glenoid– Johnston et al CORR 1984
• Osteoarthritis
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Complication: Osteoarthritis
19951995
1993199319911991
Case Courtesy of Gilles Walch
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Posterior Glenoid Rim Loss
• Open Posterior Glenoid Augmentation with Bone Graft
Courtesy of Gilles Walch
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Vertical Glenoid Sided Capsuloplasty
. Post glenoid abraded
. Drill inferior hole (3.2 mm)
T-Shift of Capsule •
•
•Courtesy of Gilles Walch
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Iliac crest (InnerTable Graft
2-3 cm Deep3-4 cm Long
Courtesy of Gilles Walch
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Extra‐Articular Fixation of Graft
• 2 MalleolarScrews (Large Frag)
• Slight Overhang
Courtesy of Gilles Walch
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Graft Position
Courtesy of Gilles Walch
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Post operative course
Neutral rotation4 to 6 weeks
Passive ROM
No IR for 6 weeks
Return to sports after 4 months
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Results (Gilles Walch)
21 shoulders
FU 6 y (2-19)20 VS or S (95%)
Failures : 3 (14%)- I recurrence- 2 apprehension +++ Walch et al, Knee Surg Sports
Traumatol Arthrosc 2007
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RESULTSMean Constant score : 93.3 (80-100)
Constant Score
Pain 13 (8-15)
ADL 19.3 (17-20)
Mobility 39.5 (37-40)
StrengthKg x 2
22 (14-28)
(55% no pain)
(80% symmetric ER)
Courtesy of Gilles Walch
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XR Results
4 Arthritis2 preop2 postop
Courtesy of Gilles Walch
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Post. Capsulorraphyn FU Rec
sub/disFailure
rate
Provencher (Ascop)(2005-Am J Sports Med)
33 3 y 7 21%
Wolf BR (Open)(2005-JSES)
37 8 y 8 19%
Kim (Ascop)(2003 - JBJS Am)
27 3 y 1 4%
Williams (Ascop)(2003-AJSM)
27 5 y 3 11%
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Additional Open Procedures
• Posterior Stabilization via an anterior approach
• Posterior “Addition Acromioplasty”
• Cadaver Graft/Capsular Reinforcement
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Post Stabilization via Anterior Approach• Introduced by Neer (“cruciate closure”) for MDI patients with significant posterior instab
WIRTH M. A. et.al. J Bone Joint Surg 1998:80:1570-8
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Posterior Addition Acromioplasty
Scapinelli JSES 2006
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Graft Reinforcement
• Possible improvement of results in cases of thinned/insufficient capsular tissues
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Open Posterior Capsular Reconstruction
• Acceptable treatment option. Higher morbidity but effective alternative to arthroscopic stabilization if performed properly
• Can be performed from the front in cases of MDI
• Treatment of choice in cases of bony and capsular deficiency
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Thanks