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Double Bundle ACL Reconstruction
Double Bundle ACL Reconstruction

Surgical Technique
D   ouble bundle ACL reconstruction allows more accurate recreation of native anatomy
by replicating both the anteromedial (AM) and posterolateral (PL) bundles of the ACL.
Recent biomechanical studies have suggested that double bundle ACLR can more effec-
tively restore rotational stability of the knee theoretically improving short and long term
outcomes. Arthrex DB ACL instrumentation allows precise placement of femoral and
tibial sockets and helps avoid common technical errors such as tunnel convergence and
drilling inaccuracy.

The Transportal ACL Guides (TPGs) facilitate femoral
socket creation through the anteromedial portal, thus
allowing more freedom in socket placement than
transtibial techniques. Multiple sizes allow custom wall
thickness depending on socket diameter and the angled
tip ensures 30˚ of divergence between sockets.

                                                                                      The RetroDrill® allows surgeons to
                                                                                      visualize full tunnel diameter
                                                                                      before drilling tibial tunnels
                                                                                      and has been proven to better
                                                                                      preserve tibial plateau cortical bone
                                                                                      than standard antegrade drilling.
                                                                                      Inside/out drilling on the tibia also
                                                                                      ensures separation and divergence
                                                                                      of tibial tunnels.




                                                                                      Three-dimensional and sagittal
                                                                                      computed tomography of tibial
                                                                                      tunnel specimen, from antegrade
                                                                                      group, demonstrates fracture of
                                                                                      subchondral bone*




                                                                                      Three-dimensional and sagittal
                                                                                      computed tomography of tibial tunnel,
                                                                                      after retrograde drilling, shows no
                                                                                      subchondral fracture or microtrauma*

*McAdams TR, et al (2008). Tibial Aperture Bone Disruption after Retrograde versus
Antegrade Tibial Tunnel Drilling: a Cadaveric Study. Knee Surgery, Sports Traumatology,
Arthroscopy.
PORTAL PLACEMENT




                                                                                AC       MP           AL




1                                                                1a

Two to three arthroscopic portals are routinely used. A lateral viewing portal (AL), a medial parapatellar viewing portal (MP)
and occasionally an accessory medial working portal (AC). After making the AL and MP portals a spinal needle is inserted
approximately 1.5 cm medial and .5 cm inferior to the MP. Arthroscopically visualize the needle entering above the medial
meniscus and confirm that the femoral footprint can be reached with the tip of the needle before making the AC portal.


FEMORAL SOCKET PREPARATION
Anteromedial (AM) socket preparation may be carried out by viewing through the AL portal while drilling through the MP
or AC portal. Alternatively, the surgeon may view from the MP and drill through the AC.




2                                       2a                                           3

Load the Transportal Femoral Guide (TPG) of appropriate offset (radius of socket plus 1 or 2 mm) with the RetroButton® Pin
II. Flex the knee to approximately 110˚. Place the TPG through the MP or AC and position against the posterior cortex. Drill
the RetroButton Pin II through the center of the AM bundle footprint. After the pin exits the lateral femoral cortex, remove
the drill and TPG. Pull back on the RetroButton Pin II until the spade tip catches on the lateral femoral cortex. Read the
intraosseous distance off the pin shaft intraarticularly. Drill the femoral socket 10 mm deeper than desired graft depth in the
socket. Choose RetroButton loop length for AM socket. Leave a passing suture in the AM socket for graft passing.
4                                                                 4a

Posterolateral (PL) socket creation can also be carried out through the MP, but most commonly is performed through the
AC. Load TPG of appropriate offset (radius of PL socket plus 2-3 mm) with RetroButton Pin II. Place TPG offset against
the anterior/distal lip of the AM socket. In this position, the TPG will give 30˚ of divergence between sockets and preserve
the appropriate 2-3 mm bone bridge between AM and PL sockets. Drill RetroButton Pin II through the center of the PL
footprint and note the intraosseous length. Drill socket to appropriate depth and choose RetroButton length and leave a
passing suture in the PL socket for graft passing.

TIBIAL TUNNEL PREPARATION




5                                                                 6

Choose appropriate sized RetroCutter for the PL tunnel and attach to the RetroDrill guide. Place RetroCutter over the
PL footprint. RetroCutter allows visualization of tunnel circumference before drilling and should be centered anterior to
the PCL, medial to the posterior root of the lateral meniscus and posterior to the AM footprint. The drill sleeve should be
approximated to the tibial cortex just anterior to the MCL, giving the PL tunnel an oblique angle of approximately 60˚
to the tibial plateau. The RetroDrill Pin is then drilled into the tibia until engaging the RetroCutter. Once attached, distal
traction and forward drilling will create tibial tunnel. If a RetroScrew is being used for tibial fixation of the PL graft it
should be done at this time.
7                                                                 8

The AM tunnel is then created by placing the appropriate sized RetroCutter over the AM footprint just anterior and
medial to the tibial tunnel, at the level of the anterior root of the lateral meniscus. Approximately 3 mm of bone should
remain between tunnels at the tibial plateau. This can be visualized arthroscopically with the RetroCutter in place.
The AM tunnel should be oriented in a more vertical direction than the PL to make sure tunnels diverge externally.



PASSING OF GRAFTS AND FEMORAL FIXATION




9                                                                10


Pass the PL graft first by retrieving the femoral passing suture through the tibial tunnel. Use the passing suture to pull
the PL RetroButton/graft construct through the tibia and into the femur. Repeat these steps for the AM bundle.
Tension each graft while cycling the knee. Optional: If aperture fixation is desired, an interference screw may be placed
into the femoral sockets immediately after passing each graft.
TIBIAL FIXATION OF GRAFTS




11                                                            12

With the knee in full extension, the PL graft is fixed on       With the knee in 30˚ of flexion, the AM bundle is fixed
the tibial side with a full thread Bio-Interference Screw,      with a RetroScrew or a full thread Bio-Interference Screw.
if not already completed with a RetroScrew.




ALL-INSIDE OPTION




13                                                            14

Using the same socket preparation tools and RetroButton/RetroScrew implants, an all-inside version of the double bundle
can be performed. This minimally invasive version of the double bundle technique decreases patient morbidity and bone
removal from this four-tunnel procedure.
ORDERING INFORMATION
RetroButton Drill Pin II                                AR-1595
Transtibial RetroDrill Pin, 3 mm, w/suture eye          AR-1250RT
Transportal ACL Guide (TPG), 4 mm                       AR-1800-04
Transportal ACL Guide (TPG), 5 mm                       AR-1800-05
Transportal ACL Guide (TPG), 6 mm                       AR-1800-06
Transportal ACL Guide (TPG), 7 mm                       AR-1800-07
Transportal ACL Guide (TPG), 8 mm                       AR-1800-08
Dual RetroCutter, 6 mm                                  AR-1204RD-06S
Dual RetroCutter, 7 mm                                  AR-1204RD-07S
Dual RetroCutter, 8 mm                                  AR-1204RD-08S
Dual RetroCutter, 8.5 mm                                AR-1204RD-085S
Dual RetroCutter, 9 mm                                  AR-1204RD-09S
Dual RetroCutter, 9.5 mm                                AR-1204RD-095S
Dual RetroCutter, 10 mm                                 AR-1204RD-10S
Dual RetroCutter, 11 mm                                 AR-1204RD-11S
Dual RetroCutter, 12 mm                                 AR-1204RD-12S

Accessory Instruments:
RetroScrew Driver, thin                                 AR-1586T
Constant Tibial Guide for RetroDrill, 52.5˚             AR-1775R
Drill Sleeve for Constant Tibial Guide for RetroDrill   AR-1776R

Disposables:
Guide Pin w/Suture Eye, 2.4 mm, qty. 6                  AR-1297L
Suture Passing Wire                                     AR-1255-18
#2 FiberLoop w/Straight Needle                          AR-7234
#2 TigerLoop w/Straight Needle                          AR-7234T

RetroScrews:
RetroScrew, 7 mm x 20 mm                                AR-1586RB-07
RetroScrew, 8 mm x 20 mm                                AR-1586RB-08
RetroScrew, 9 mm x 20 mm                                AR-1586RB-09
RetroScrew, 10 mm x 20 mm                               AR-1586RB-10
Femoral RetroScrew, 7 mm x 20 mm                        AR-1586FRB-07
Femoral RetroScrew, 8 mm x 20 mm                        AR-1586FRB-08
Femoral RetroScrew, 9 mm x 20 mm                        AR-1586FRB-09
Femoral RetroScrew, 10 mm x 20 mm                       AR-1586FRB-10
Titanium Femoral RetroScrew, 7 mm x 20 mm               AR-1586FR-07
Titanium Femoral RetroScrew, 8 mm x 20 mm               AR-1586FR-08
Titanium Femoral RetroScrew, 9 mm x 20 mm               AR-1586FR-09
Titanium Femoral RetroScrew, 10 mm x 20 mm              AR-1586FR-10
Titanium Tibial RetroScrew, 8 mm x 20 mm                AR-1586R-08
Titanium Tibial RetroScrew, 9 mm x 20 mm                AR-1586R-09
Titanium Tibial RetroScrew, 10 mm x 20 mm               AR-1586R-10

12 mm titanium RetroButtons:
RetroButton, 15 mm loop                                 AR-1588-15
RetroButton, 20 mm loop                                 AR-1588-20
RetroButton, 25 mm loop                                 AR-1588-25
RetroButton, 30 mm loop                                 AR-1588-30
RetroButton, 35 mm loop                                 AR-1588-35
RetroButton, 40 mm loop                                 AR-1588-40
RetroButton, 45 mm loop                                 AR-1588-45
RetroButton, 50 mm loop                                 AR-1588-50
RetroButton, 55 mm loop                                 AR-1588-55
RetroButton, 60 mm loop                                 AR-1588-60

15 mm titanium RetroButtons:
RetroButton, long, 15 mm loop                           AR-1589-15
RetroButton, long, 20 mm loop                           AR-1589-20
RetroButton, long, 25 mm loop                           AR-1589-25
RetroButton, long, 30 mm loop                           AR-1589-30
RetroButton, long, 35 mm loop                           AR-1589-35
RetroButton, long, 40 mm loop                           AR-1589-40
RetroButton, long, 45 mm loop                           AR-1589-45
RetroButton, long, 50 mm loop                           AR-1589-50
RetroButton, long, 55 mm loop                           AR-1589-55
RetroButton, long, 60 mm loop                           AR-1589-60
This description of technique is provided as an educational tool and clinical aid to assist properly licensed medical professionals
           in the usage of specific Arthrex products. As part of this professional usage, the medical professional must use
                 their professional judgment in making any final determinations in product usage and technique.
             In doing so, the medical professional should rely on their own training and experience and should conduct
                       a thorough review of pertinent medical literature and the product’s Directions For Use.




U.S. PATENT NOS. 5,320,626; 5,350,383; 6,716,234; 7,063,717; 7,238,189 and PATENTS PENDING

                                       ©
                                        2008, Arthrex Inc. All rights reserved. LT0184A

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Lt0184 a double bundle acl

  • 1. Double Bundle ACL Reconstruction Double Bundle ACL Reconstruction Surgical Technique
  • 2. D ouble bundle ACL reconstruction allows more accurate recreation of native anatomy by replicating both the anteromedial (AM) and posterolateral (PL) bundles of the ACL. Recent biomechanical studies have suggested that double bundle ACLR can more effec- tively restore rotational stability of the knee theoretically improving short and long term outcomes. Arthrex DB ACL instrumentation allows precise placement of femoral and tibial sockets and helps avoid common technical errors such as tunnel convergence and drilling inaccuracy. The Transportal ACL Guides (TPGs) facilitate femoral socket creation through the anteromedial portal, thus allowing more freedom in socket placement than transtibial techniques. Multiple sizes allow custom wall thickness depending on socket diameter and the angled tip ensures 30˚ of divergence between sockets. The RetroDrill® allows surgeons to visualize full tunnel diameter before drilling tibial tunnels and has been proven to better preserve tibial plateau cortical bone than standard antegrade drilling. Inside/out drilling on the tibia also ensures separation and divergence of tibial tunnels. Three-dimensional and sagittal computed tomography of tibial tunnel specimen, from antegrade group, demonstrates fracture of subchondral bone* Three-dimensional and sagittal computed tomography of tibial tunnel, after retrograde drilling, shows no subchondral fracture or microtrauma* *McAdams TR, et al (2008). Tibial Aperture Bone Disruption after Retrograde versus Antegrade Tibial Tunnel Drilling: a Cadaveric Study. Knee Surgery, Sports Traumatology, Arthroscopy.
  • 3. PORTAL PLACEMENT AC MP AL 1 1a Two to three arthroscopic portals are routinely used. A lateral viewing portal (AL), a medial parapatellar viewing portal (MP) and occasionally an accessory medial working portal (AC). After making the AL and MP portals a spinal needle is inserted approximately 1.5 cm medial and .5 cm inferior to the MP. Arthroscopically visualize the needle entering above the medial meniscus and confirm that the femoral footprint can be reached with the tip of the needle before making the AC portal. FEMORAL SOCKET PREPARATION Anteromedial (AM) socket preparation may be carried out by viewing through the AL portal while drilling through the MP or AC portal. Alternatively, the surgeon may view from the MP and drill through the AC. 2 2a 3 Load the Transportal Femoral Guide (TPG) of appropriate offset (radius of socket plus 1 or 2 mm) with the RetroButton® Pin II. Flex the knee to approximately 110˚. Place the TPG through the MP or AC and position against the posterior cortex. Drill the RetroButton Pin II through the center of the AM bundle footprint. After the pin exits the lateral femoral cortex, remove the drill and TPG. Pull back on the RetroButton Pin II until the spade tip catches on the lateral femoral cortex. Read the intraosseous distance off the pin shaft intraarticularly. Drill the femoral socket 10 mm deeper than desired graft depth in the socket. Choose RetroButton loop length for AM socket. Leave a passing suture in the AM socket for graft passing.
  • 4. 4 4a Posterolateral (PL) socket creation can also be carried out through the MP, but most commonly is performed through the AC. Load TPG of appropriate offset (radius of PL socket plus 2-3 mm) with RetroButton Pin II. Place TPG offset against the anterior/distal lip of the AM socket. In this position, the TPG will give 30˚ of divergence between sockets and preserve the appropriate 2-3 mm bone bridge between AM and PL sockets. Drill RetroButton Pin II through the center of the PL footprint and note the intraosseous length. Drill socket to appropriate depth and choose RetroButton length and leave a passing suture in the PL socket for graft passing. TIBIAL TUNNEL PREPARATION 5 6 Choose appropriate sized RetroCutter for the PL tunnel and attach to the RetroDrill guide. Place RetroCutter over the PL footprint. RetroCutter allows visualization of tunnel circumference before drilling and should be centered anterior to the PCL, medial to the posterior root of the lateral meniscus and posterior to the AM footprint. The drill sleeve should be approximated to the tibial cortex just anterior to the MCL, giving the PL tunnel an oblique angle of approximately 60˚ to the tibial plateau. The RetroDrill Pin is then drilled into the tibia until engaging the RetroCutter. Once attached, distal traction and forward drilling will create tibial tunnel. If a RetroScrew is being used for tibial fixation of the PL graft it should be done at this time.
  • 5. 7 8 The AM tunnel is then created by placing the appropriate sized RetroCutter over the AM footprint just anterior and medial to the tibial tunnel, at the level of the anterior root of the lateral meniscus. Approximately 3 mm of bone should remain between tunnels at the tibial plateau. This can be visualized arthroscopically with the RetroCutter in place. The AM tunnel should be oriented in a more vertical direction than the PL to make sure tunnels diverge externally. PASSING OF GRAFTS AND FEMORAL FIXATION 9 10 Pass the PL graft first by retrieving the femoral passing suture through the tibial tunnel. Use the passing suture to pull the PL RetroButton/graft construct through the tibia and into the femur. Repeat these steps for the AM bundle. Tension each graft while cycling the knee. Optional: If aperture fixation is desired, an interference screw may be placed into the femoral sockets immediately after passing each graft.
  • 6. TIBIAL FIXATION OF GRAFTS 11 12 With the knee in full extension, the PL graft is fixed on With the knee in 30˚ of flexion, the AM bundle is fixed the tibial side with a full thread Bio-Interference Screw, with a RetroScrew or a full thread Bio-Interference Screw. if not already completed with a RetroScrew. ALL-INSIDE OPTION 13 14 Using the same socket preparation tools and RetroButton/RetroScrew implants, an all-inside version of the double bundle can be performed. This minimally invasive version of the double bundle technique decreases patient morbidity and bone removal from this four-tunnel procedure.
  • 7. ORDERING INFORMATION RetroButton Drill Pin II AR-1595 Transtibial RetroDrill Pin, 3 mm, w/suture eye AR-1250RT Transportal ACL Guide (TPG), 4 mm AR-1800-04 Transportal ACL Guide (TPG), 5 mm AR-1800-05 Transportal ACL Guide (TPG), 6 mm AR-1800-06 Transportal ACL Guide (TPG), 7 mm AR-1800-07 Transportal ACL Guide (TPG), 8 mm AR-1800-08 Dual RetroCutter, 6 mm AR-1204RD-06S Dual RetroCutter, 7 mm AR-1204RD-07S Dual RetroCutter, 8 mm AR-1204RD-08S Dual RetroCutter, 8.5 mm AR-1204RD-085S Dual RetroCutter, 9 mm AR-1204RD-09S Dual RetroCutter, 9.5 mm AR-1204RD-095S Dual RetroCutter, 10 mm AR-1204RD-10S Dual RetroCutter, 11 mm AR-1204RD-11S Dual RetroCutter, 12 mm AR-1204RD-12S Accessory Instruments: RetroScrew Driver, thin AR-1586T Constant Tibial Guide for RetroDrill, 52.5˚ AR-1775R Drill Sleeve for Constant Tibial Guide for RetroDrill AR-1776R Disposables: Guide Pin w/Suture Eye, 2.4 mm, qty. 6 AR-1297L Suture Passing Wire AR-1255-18 #2 FiberLoop w/Straight Needle AR-7234 #2 TigerLoop w/Straight Needle AR-7234T RetroScrews: RetroScrew, 7 mm x 20 mm AR-1586RB-07 RetroScrew, 8 mm x 20 mm AR-1586RB-08 RetroScrew, 9 mm x 20 mm AR-1586RB-09 RetroScrew, 10 mm x 20 mm AR-1586RB-10 Femoral RetroScrew, 7 mm x 20 mm AR-1586FRB-07 Femoral RetroScrew, 8 mm x 20 mm AR-1586FRB-08 Femoral RetroScrew, 9 mm x 20 mm AR-1586FRB-09 Femoral RetroScrew, 10 mm x 20 mm AR-1586FRB-10 Titanium Femoral RetroScrew, 7 mm x 20 mm AR-1586FR-07 Titanium Femoral RetroScrew, 8 mm x 20 mm AR-1586FR-08 Titanium Femoral RetroScrew, 9 mm x 20 mm AR-1586FR-09 Titanium Femoral RetroScrew, 10 mm x 20 mm AR-1586FR-10 Titanium Tibial RetroScrew, 8 mm x 20 mm AR-1586R-08 Titanium Tibial RetroScrew, 9 mm x 20 mm AR-1586R-09 Titanium Tibial RetroScrew, 10 mm x 20 mm AR-1586R-10 12 mm titanium RetroButtons: RetroButton, 15 mm loop AR-1588-15 RetroButton, 20 mm loop AR-1588-20 RetroButton, 25 mm loop AR-1588-25 RetroButton, 30 mm loop AR-1588-30 RetroButton, 35 mm loop AR-1588-35 RetroButton, 40 mm loop AR-1588-40 RetroButton, 45 mm loop AR-1588-45 RetroButton, 50 mm loop AR-1588-50 RetroButton, 55 mm loop AR-1588-55 RetroButton, 60 mm loop AR-1588-60 15 mm titanium RetroButtons: RetroButton, long, 15 mm loop AR-1589-15 RetroButton, long, 20 mm loop AR-1589-20 RetroButton, long, 25 mm loop AR-1589-25 RetroButton, long, 30 mm loop AR-1589-30 RetroButton, long, 35 mm loop AR-1589-35 RetroButton, long, 40 mm loop AR-1589-40 RetroButton, long, 45 mm loop AR-1589-45 RetroButton, long, 50 mm loop AR-1589-50 RetroButton, long, 55 mm loop AR-1589-55 RetroButton, long, 60 mm loop AR-1589-60
  • 8. This description of technique is provided as an educational tool and clinical aid to assist properly licensed medical professionals in the usage of specific Arthrex products. As part of this professional usage, the medical professional must use their professional judgment in making any final determinations in product usage and technique. In doing so, the medical professional should rely on their own training and experience and should conduct a thorough review of pertinent medical literature and the product’s Directions For Use. U.S. PATENT NOS. 5,320,626; 5,350,383; 6,716,234; 7,063,717; 7,238,189 and PATENTS PENDING © 2008, Arthrex Inc. All rights reserved. LT0184A