c o r t i c o t o m y
TRANSCRIPT
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CORTICOTOMY
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TECHNIQUES OF CORTICOTOMY
•METHODS• 1) PERCUTANEOUS
CORTICOTOMY
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TECHNIQUES OF CORTICOTOMY
• 2) DRILLING OF POSTERIOR CORTEX
• 3) GIGLI SAW METHOD • 4) OBLIQUE OSTEOTOMY
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PERCUTANEOUS CORTICOTOMY
•PRESERVES INTRAMEDULLARY AND ENDOSTEAL CIRCULATION
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PERCUTANEOUS CORTICOTOMY
• 5-10 MM. INCISION OVER THE TIBIAL CREST
• LOW ENERGY OSTEOTOMY DONE USING OSTEOTOME AND HAMMER AFTER PERIOSTEAL ELEVATION
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PERCUTANEOUS CORTICOTOMY
• FIRST ANTERIOR THEN MEDIAL AND LATERAL CORTICES CUT WITH OSTEOTOME
• SIMILARLY POSTEROMEDIAL AND POSTERO LATERAL CORNERS CUT
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PERCUTANEOUS CORTICOTOMY
•OSTEOTOME TWISTED TO CUT POSTERIOR CORTEX
•COMPLETED BY ROTATIONAL OSTEOCLASIS
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DRILLING OF POSTERIOR CORTEX
• ROTATIONAL OSTEOCLASIS DONE • POSTERIOR CORTEX PERFORATED
BY FOUR TO FIVE 4MM DRILL HOLES
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GIGLI SAW METHOD
• SECOND INCISION MADE AT POSTEROMEDIAL BORDER
• PERIOSTEUM ELEVATED
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GIGLI SAW METHOD • NEEDLE OR TAPE PASSED FROM POSTEROMEDIAL INCISION AROUND POST. CORTEX AND BROUGHT OUT THROUGH ANT. INCISION
• CUT BY GIGLI SAW
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OBLIQUE OSTEOTOMY
• HAS SOME CORTICAL SUPPORT• DECREASES TENDENCY FOR
AXIAL DEVIATION• SPIRAL OSTEOTOMIES CAN
ALSO BE DONE