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52 Cards in this Set
- Front
- Back
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Overdrill, underdrill, countersink 1.5 screw
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O - 1.5
U - 1.1 C - 1.5 |
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STEP TO INSERTING A FULLY THREADED SCREW
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-OVERDRILL NEAR
UNDERDRILL THE FAR COUNTERSINK MEASURE TAP SCREW |
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HOW MUCH OF SCREW SHOULD PASS THE FAR CORTEX
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1.5 THREADS
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PURPOSE OF TAPPING
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CREATES A PATH FOR THE SCREW HEADS
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PURPOSE OF COUNTERSINK
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PREVENTS STRESS RISERS AND TISSUE IRRITATION
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WHATS IN A MINIFRAG SET
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-ALL FULLY THREADED
1.5 2.0 2.7 |
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DIFFERENCES B/W CORTICAL AND CANCELLOUS
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-CORTICAL HAS SMALLER PITCH
-CORTICAL HAS SMALLER DIFFERENCE B/W THREAD DIAM AND CORE DIAM |
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WHICH SCREW HAS A FLUTED TIP
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SELF TAPPING
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SMALL FRAG SET
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3.5
4.0 FULLY THREADED 4.0 PARTIALLY THREADED |
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LARGE FRAG SET
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4.5 - REG AND MALLEOLAR
6.5 PARTIALLY AND FULLY |
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SYNTHES MODULAR HAND SCREW SYSTEM
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1.0
1.3 1.5 2.0 2.4 2.7 |
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CANNULATED SCREW SIZES
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-SYNTHES 3.0, 4.0
-SMITH/NEPHEW 4.0, 5.5, 6.5, 7.0 |
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WHAT STEP DIFFERS FOR INSERTING A CANNULATED VERSUS FULLY THREADED REG SCREW
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-INSERT A GUIDE PIN TO THE FAR AND THEN MEASURE
-MEASURE -DRILL NEAR -DRILL FAR -TAP -COUNTERSINK -SCREW |
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STEINMAN PIN SIZES
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5/64 - 12/64, EXCEPT 11/64
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K WIRE SIZES
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0.028 (0.6 IMM)
0.035 (0.9 MM) 0.045 (1.2 MM) 0.062 (1.6 MM) |
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LARGE FRAG SET HAS 4.5 MALLEOLAR SCREW - EXPLAIN IT
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-USED FOR FIXATION OF MEDIAL MALLEOLUS
-PARTIALLY THREADED, SAME THREAD PROFILE AND PITCH AS A CORTICAL SCREW -CUTTING TIP |
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GENERAL TREND FOR OVERDRILL AND COUNTERSINK
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-SAME AS THE SIZE OF THE SCREW
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Overdrill, underdrill, countersink 2.0
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2.0
1.5 2.0 |
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Overdrill, underdrill, countersink 2.7
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2.7
2.0 2.7 |
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Overdrill, underdrill, countersink 3.5
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3.5
2.5 3.5 |
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Overdrill, underdrill, countersink 4.0
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4.0
2.5 4.0 |
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Overdrill, underdrill, countersink 4.5
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4.5
3.2 4.5 |
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Overdrill, underdrill, countersink 6.5
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6.2
3.2 6.5 -EXCEPTION TO OVER AND COUNTER WITH THE SAME DRILL SIZE AS SCREW |
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UNDERDRILL FOR 1.5
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1.1
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UNDERDRILL FOR 2.0
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1.5
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UNDERDRILL FOR 2.7
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2.0
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UNDERDRILL FOR 3.5
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2.5
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UNDERDRILL FOR 4.0
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2.5
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UNDERDRILL FOR 4.5
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3.2
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UNDERDRILL FOR 6.5
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3.2
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UNDERDRILL FOR BOTH 4.5 AND 6.5
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3.2
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REESE SCREW
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HEADLESS SCREW USED TO CREATE COMPRESSION IN ARTHRODESIS
-PROX THREADS ARE CLOCKWISE -DISTAL THREADS ARE COUNTER CLOCKWISE -SMOOTH IN BETWEEN |
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HERBERT SCREW
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HEADLESS SCREW
-CAN BE INSERTED THROUGH ARTICULAR CARTILAGE -SMOOTH IN BETWEEN THREADED AREAS |
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SHOULD PLATE BE PLACED ON COMPRESSION OR TENSION SIDE
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TENSION (PLANTAR ASPECT OF MET)
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WHAT IS ORTHOFIX AND HOW LONG DOES IT LAST
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-POLYGLYCOLIC ACID (LIKE DEXON)
-WEAKENS IN 6-12WKS -ABSORBS IN 1-3 YRS |
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WHAT IS ORTHOSORB
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PDS - POLYDIAXANONE
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WHAT IS VICRYL MADE OF
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POLYGLACTIN 910
-90% GLYCOLIDE -10% LACTIDE |
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WHEN DOES PDS (ORTHOSORB) LOOSE STRENGTH AND ABSORB
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-WEAK IN 4-6 WKS
-ABSORB IN 3-6 MTHS |
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WHAT IS 2 FINGER TIGHTNESS
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440-700 LBS
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PRINCIPLES OF A0
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FARM
-STABLE FIXATION -ATRAUMATIC TECHNIQUE -ANATOMIC REDUCTION -EARLY MOBILIZATION |
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IDEAL PLACEMENT OF SCREW FOR LONG OBLIQUE FX
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-SCREW 90 TO LONG AXIS
-ONE PROXIMAL AND ONE DISTAL TO THE FRACTURE AT 90 TO THE FRACTURE LINE |
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FUNCTION OF SCREW PERPENDICULAR TO FRACTURE LINE
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COMPRESSION
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FUNCTION OF SCREW PERPENDICULAR TO LONG AXIS
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-PREVENTS DISPLACEMENT WITH AXIAL LOADING
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RAKE ANGLE
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THREAD TO AXIS ANGLE
-AXIS IS THE CENTRAL LINE OF THE SCREW |
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PITCH ON A CORTICAL SCREW
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1.25 MM
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PITCH ON A CANCELLOUS SCREW
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1.75 MM
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WHY DOES CORTICAL HAVE A TIGHTER PITCH
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-FOR HARD CORTICAL BONE
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WHAT IS THE SMALLER PITCH ON A CANCELLOUS SCREW USED FOR
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METAPHYSEAL AND EPIPHYSEAL BONE
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WHY DOES A SELF TAPPING SCREW HAVE A FLUTED TIP
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CLEAR DEBRIS AS IT ADVANCES
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SCREW SET FOR 1/4 TUBULAR PLATE
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MINI FRAG SET
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SCREW SET FOR A 1/3 TUBULAR PLATE
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SMALL FRAG SET
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AO STABILIZATION RULE FOR CORTICAL THREADS
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3 OR 4 CORTICAL THREADS IN DISTAL FRAG
5 OR 6 PROXIMALLY |
