ARTHROSCOPIC ANKLE FUSION - SFA FUSION.pdf · arthroscopic steps • 1: cartilage removal • talar...
Transcript of ARTHROSCOPIC ANKLE FUSION - SFA FUSION.pdf · arthroscopic steps • 1: cartilage removal • talar...
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ARTHROSCOPIC ANKLE FUSION
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SETTING, PORTALS• SUPINE POSITION
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SETTING, PORTALS• ANTEROMEDIAL• ANTEROLATERAL• ACCESSORY PORTALS
• PERONEAL SUPERFICIAL NERVE
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ARTHROSCOPIC STEPS
• 1: CARTILAGE REMOVAL• TALAR DOME, TIBIAL PLAFOND, GUTTERS• KEEP THE BONE SURFACE AND SHAPE
• 2: DRILLING, MILLING• SUBCHONDRAL BONE
• 3: FIXATION• ANKLE POSITIONING
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AVOID EQUINUS
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RESULTS• AVERAGE FUSION RATE: 90%• SFA 1998
– FUSION: 87%– NON UNION RISK FACTORS
• EXTERNAL FIXATOR (23%) VS SCREWS (9%)• TIBIOTALAR SCREWS ALONE (13%) VS TT +
FIBULOTALAR SCREWS (3%)
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RESULTS• NON UNION RISK FACTORS
– OBESITY, TOBACCO, AVN– RESIDUAL EQUINUS
• SHORTER DELAY OF UNION– 8.7 WEEKS VS 14.5 WEEKS
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DIFFICULTIES• SURGEON EXPERIENCE
• LONGER OPERATIVE TIME
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PITFALLS• RESIDUAL EQUINUS
• ANTERIOR TALAR TRANSLATION
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INDICATIONS• NO MAJOR BONE LOSS
• FRONTAL AND SAGITTAL DEFORMITIES– BASICALLY: <15°– EXTENDED INDICATIONS
– Cannon (foot ankle int. 2004) – Winson (JBJS B 2005)– FX Sevestre (SFA, GRECMIP)– Gougoulias (foot ankle int. 2007)
» 2 groups : A ( 48 < 15° ) VS B ( 30 > 15° max 45°)
» Same 97 % fusion, axial correction in 2 groups» Good release of the gutters
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???
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Frontal malalignment = asymmetric wear increased by a laxity in the convexity of the deformity
Reducibility can be easily appreciated by a dynamic radiograph preoperative
COMPLETEREDUCIBILITY
EASYARTHROSCOPIC
PROCEDURE
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A partial reduction of the déformity must be completed by a gutters optimal release, with arthroscopic arthrolysis
Bone fragment from the medial arthroscopic arthrolysis
Partial reduction
More difficult arthroscopic time
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6 W
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Last difficulty at the time of fixation
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Don’t fall in the bone defect !!!
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The bone defect persisting after osteosynthesis don’t interfere with the fusion
1 m.2 m.
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CONCLUSION• Majority of coronal deformities
– BUT NOT AT THE BEGINNING OF YOUR EXPERIENCE !!!
• Importance of dynamic radiograph• Technical difficulties:
– If partial reducibility / arthroscopic arthrolysis
– Don’t fall in the defect at ostesynthesis time