humelock reversed · 2018-01-14 · no trials ! solid stem implanted after metaphyseal and...
TRANSCRIPT
HUMELOCK REVERSED
IMPACTED OR
CEMENTABLE LOCKABLE
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TABLE OF CONTENTS
1. HUMERAL PART ! No trials ! Humeral cup ! Epiphyseal part ! Adapted design to trauma ! Lockable or cementable ! Cage for graft ! 145° CD angle ! Modularity stem/cup 2. GLENOID PART ! Glenoid ! Size and position of the baseplate ! Fixation of the baseplate ! Variable length posts ! Glenosphere ! Post op X-RAY
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1. HUMERAL PART
! SOLID STEM Ø 8/10/12mm ! EPIPHYSIS 32/36/40mm ! NO TRIAL IMPLANTS ! HUMERUS/GLENOID: CD ANGLE OF 145° ! POLY CUP WITH MORSE TAPER Ti ! CEMENTABLE or LOCKABLE ! 18 DIFFERENT COMBINATIONS ! TRAUMA DESIGN ! CAGE FOR BONY STABILIZATION
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NO TRIALS
! Solid stem implanted after metaphyseal and epiphyseal rasping to compact cancellous bone and not using a reamer to remove it.
! The consequence is a better press-fit between the stem and humerus.
! If stability is not completed, stem can be locked or cemented.
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HUMERAL CUP
! Cup is in high density poly which is thermo molded on a titanium shell to optimize impaction on the stem with a morse taper (without debris).
! All cups can be centered or offset to
find the best position without having over inventory.
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EPIPHYSEAL PART
! Three sizes of stem are available 32/36/40mm.
! Size 32 is UNIQUE on the market. ! The interest is to keep bony stock with
indications if small humerus. ! This avoids to ream to Ø36mm by
removing all cancellous bone.
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ADAPTED DESIGN TO TRAUMA
! Epiphyseal part has been done smaller, specially for trauma indications.
! This designs allows a better reinsertion of rotator muscles to optimize the functionnal outcomes.
! Use of Smart loops is recommended for a better stability.
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LOCKABLE OR CEMENTABLE
! On the diaphyseal part of the stem, a surface without HA can be interlocked.
The two screws go through the HA pegs. ! This same surface can be cemented. In this case HA pegs avoid the cement to go in the holes.
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CAGE FOR GRAFT
A cage for graft is available and can be fix on the epiphyseal part. The goal is: ! To fill a gap in trauma ! To stabilize the stem in primary surgery
(if very osteoporotic bone)
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145° CD ANGLE
! CD angle is 145°. ! To reduce the risk of scapular notching
by lateralizing the humerus. ! Stability is kept by tilting and lowering
the position of the glenosphere.
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MODULARITY STEM/CUP
! All cups are compatible with all stems. ! This makes 18 possible combinations
between stem and cup. ! This gives a large modularity of
implants during surgery.
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2. GLENOID PART
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GLENOID
! SMALL DIAMETER 24 mm ! POSITIONING ACCORDING TO BIGLIANI/KELLY’S 12mm ! STABILITY BY 4 ANGULAR SCREWS ! LOCKING SCREWS or STD ! VARIABLE ANGLE SCREWING SYSTEM ! 3 LENGHTS OF POSTS ! LOW AND 10° TILTED GLENOSPHERE
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SIZE AND POSITION OF THE BASEPLATE
! The baseplate (metaglene) has a unique size of Ø24mm.
! Its positionning is driven by a guide which gives the best place for a K-wire at 12mm over the inferior part of the glenoid (Dr Kelly).
! The positionning is simple and reproducible.
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FIXATION OF THE BASEPLATE
12°
! Fixation of the baseplate is done by 4 variable angle screws.
! The screws can be locked or not according to the needs.
! The green zone on the drawing shows the possible angulations of the 4 screws to have the best fixation.
! Cementless post Ø7mm.
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VARIABLE LENGTH POSTS
! It is possible to increase the length of central peg by adding post of 6 and 10mm in cases of osteoporotic bone, graft or revision.
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GLENOSPHERE
! The glenosphere is fixed on the baseplate by a morse taper.
! A special instrument is available to impact the glenosphere on the baseplate.
! The 2 versions (centric and eccentric) of glenosphere are tilted of 10° to avoid scapular notching.
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POST OP X-RAY
OMEX TRAUMA
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