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BASIC SURGICAL
TECHNIQUE – TKA
Dr Aditya Apte
Sunshine hospitals
MEDIAL PARAPATELLAR
APPROACH
Originally described by Von Langenback
later modified by Robert jones and Insall
* Proximal medial border of quadriceps
tendon – medial border preserved
* Point halfway between medialis
insertion and superomedial pole of patella
* Medial border of tibial tubercle
Patello-femoral Ligament
AFTER ARTHROTOMY
STEP 1 : REMOVAL OF OSTEOPHYTES UNDER MCL
STEP 2 : CLEARING FEMORAL NOTCH
STEP 3 : REMOVAL OF INFRAPATELLAR PAD OF FAT
STEP 4 : CLEARING SUPRAPATELLAR SYNOVIUM
STEP 5- Inverted Isosceles Triangle
STEP 6 : CLEARING OF
PATELLOFEMORAL OSTEOPHYTES
+ DEBULKING
ALIGNMENTS IN TKR
1. ANATOMICAL ALIGNMENT
2. MECHANICAL ALIGNMENT
• MEASURED RESECTION
• GAP BALANCING
3. KINEMATIC ALIGNMENT
ANATOMICAL ALIGNMENT
• Hungerford and Krackow
• Anatomically recreate the joint line
• Femoral cut at 8-9°of valgus combined with the 2-3°
varus tibial cut
Anatomic alignment (a) attempts to mimic the natural knee by cutting the tibia at 3° varus to the mech
f the tibia and a distal femoral cut that is 9° valgus to the mechanical axis of the femur to recreate a 6°
line. Mechanical alignment (b) involves a tibial cut that is perpendicular to the mechanical axis of the ti
distal femoral cut 6° valgus to the anatomic axis (perpendicular to the mechanical axis) of the fem
MECHANICAL ALIGNMENT
Insall - Femoral and Tibial cut perpendicular to the
mechanical axis
Insall - 1.the knee joint aligned through the anatomical
alignment may be loaded more medially with a medial tibial
plateau fixation failure.
2. cuts perpendicular to mechanical axis
a. measured resection- bony
landmarks ( preserve joint line )
b. gap balancing- ligament
tension
c. combined / modern
T-F CORRELATION
STEP 6:DISTAL FEMUR CUT
ENTRY
''Starting point for femoral IM rod
insertion is made 8-10mm anterior
to the origin of the PCL,
And slightly medial to the
midportion of the
intercondylar notch''
''A correct thickness of distal
femoral cut just skims the
roof of intercondylar notch''
Operative techniques in Orthopaedic Surgery Sam W.Wiesel
(publisher) Lippincott Williams & Wilkins 1 st Edition (2011)
Tips and tricks in total knee arthroplasty
BhavukGarg*, GauravSharma**, RajeshMalhotra***
INTRAMEDULLARY GUIDE
• AIM is for DFC to be
perpendicular to Mechanical
axis
• Identify the VCA
• General –
• Varus – 5 to 7 degree
valgus cut
• Valgus knees – 0 to 3
degree valgus cut
Distal Femur Cut
Anterior
Chamfer Cut
Posterior
Cut
Anterior
Cut
Posterior
Chamfer Cut
• - Distal femur cut corelates
with thickness of metallic
femoral component provides
- Varus/ valgus alignment
- Flexion/ extension
- Proximal/ distal position
Femur
component
aligned in
varus
Femur
component
aligned in valgus
Femur
component
aligned in neutral
varus/ valgus
position
Distal femur cut in frontal view
Femur
component
aligned in
extension
Femur
component
aligned in
flexion
Femur
component
aligned in
0° flexion/ extension
Distal femur cut in Sagittal view
Proximal
Distal
Resection level
of distal femur cut
 In general, for each 10° of flexion
contracture - additional 2mm resection
Severe FFD
STEP 7: FEMUR SIZING
POSTERIOR REFERENCING- RISKS ?
ANTERIOR REFERENCING- RISKS ?
PLACING OF THE 4 IN 1
CUTTING BLOCK
AIM – Prosthesis must be in External rotation
• TRANSEPICONDYLAR AXIS :
Lateral epicondyle - apex of bony prominence
Medial epicondyle:
Apex of the medial prominence -Anatomical TEA
Medial sulcus -Surgical TEA .
. POSTERIOR CONDYLAR AXIS :
in 3-5 degree of IR / valgus
• ANTEROPOSTERIOR AXIS(WHITESIDES LINE):
1. Line connecting the lowest point of the patellar
groove and the top of the intercondylar notch.
2. Femoral component rotation is oriented perpendicular
to it
3. easily identified / reproducible
CONFIRMATION OF
EXTERNAL ROTATION
STEP 8 : 4 IN 1 block
1. ANTERIOR AND
POSTERIOR FEMUR
CUTS – DETERMINE
ROTATION, FEMORAL
COMPONENT POSITION
2. ANTERIOR AND
POSTERIOR CHAMFER
CUTS – For
accomodation of
prosthesis
1. Anterior – notching , piano sign
2.Posterior – protect mcl, popliteus
STEP 9 : BOX CUT
• COMPONENTS
– SUBPERIOSTEAL ELEVATION OF DEEP MCL
– HYPERFLEXION OF KNEE
– EXTERNAL ROTATION OF LEG
– DELIVERING TIBIA FORWARD
RANSALL MANOUVRE
RANAWAT+INSALL
STEP 10 : PROXIMAL TIBIAL CUT
1. AIM – Tibial cut must be made
perpendicular to the
mechanical/anatomical axis of tibia
2. Method
a) Intramedullary alignment guide
b) Extramedullary alignement guide
• Landmarks
– Proximal landmarks
• Anterior to origin of PCL
• Medial third of tibial tuberosity
– Distal landmarks
• Centre of ankle
• Second Metatarsal
• EHL
EXTRAMEDULLARY
ALIGNMENT GUIDE
''An aid to tibial alignment in total knee
replacement
NJ COOKE, R BURNETT''
IDEAL PROXIMAL TIBIAL
CUT
PROXIMAL TIBIA CUT
- Proximal/ distal position
- Varus/ valgus alignment
- Posterior/ anterior slope
KEEL PREPARATION
- Anterior/ posterior position
- medial/ lateral position
- rotation
Proximal
Tibia
Cut
Tibia
component
aligned in
valgus
Tibia
component
aligned in neutral varus/
valgus
position
Tibia
component
aligned in
varus
Frontal View
Tibia component
with
posterior slope
Tibia component
neutrally aligned,
no slope
Tibia component
with
anterior slope
Sagittal View
POSTERIOR TIBIAL SLOPE
• Range – Between 0 to 7
degrees
• Indian population – 11.54
degrees Standard
Deviation of 4.5
Exceptions
malunited IA fractures
Post HTO
Mastering techniques in Orthopaedic surgery
Knee arthroplasty
Paul A.Lotke
Correlation of posterior tibial slope with Metadiaphyseal angle in TKA – Indian
population
Shuhrashnu S Mohanty
EXTENSION GAP CONFIRMED WITH
SPACER BLOCK
FLEXION GAP CONFIRMED WITH
SPACER BLOCKS
EQUAL SIZE FLEXION AND
EXTENSION GAPS
9 scenarios!!
Rotational alignment of the tibial component in total knee arthroplasty is better at the medial
third of tibial tuberosity than at the medial border
Jörg Lützner,1 Frank Krummenauer,2 Klaus-Peter Günther,1 and Stephan Kirschner1
TIBIAL PREPARATION AND
SIZING
Which Rotational Reference for Tibial Component is optimal in Total Knee Arthroplasty? + 1 Mitsuyasu, H;
1Matsuda, S; 1 Fukagawa, S; 1Miura, H; 1Okazaki, K; 1, 2Tashiro, T; 1Kawahara, S; 1 Iwamoto, Y + 1Department
of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka City, Japan
2Department of Advanced Medicine and Innovative Technology, Kyushu University Hospital, Fukuoka, Japan
•Sizing – A-P of lateral plateau of tibia
•Rotation –
• Anatomic landmarks
a) Anteromedial border(if not
involved in disease process)
b) alignment
c) akagi line
d) free floating technique
GAP BALANCING
• Flexion / extension first
• Proximal tibia + distal femur cut
• Balance gaps and perform releases
• Complete cuts
Knee at 90 degrees of flexion and the collateral ligaments equally
tensioned using laminar spreaders. Note the transepicondylar axis
is parallel and anterior-posterior axis is perpendicular to the
resected proximal tibia.
Placement of the anteroposterior femoral cutting block parallel to the
resected proximal tibia with each collateral ligament tensioned to create a
rectangular flexion gap.
* Precise proximal tibial resection is critical when using a
gap balancing technique
* Varus tibial resection will result in increased internal
rotation of the femoral component
* Valgus tibial cut will lead to excessive external rotation
of the femoral component.
* Over- or under-resection of the femoral or tibial bone
resections can lead to a mismatch of flexion and extension
gap dimensions.
• Modern / combined technique-
• 1. distal femur cut
• 2. proximal tibia
• 3. balance in extension
• 4. complete femur prep.
• 5. balance in flexion
TEN COMMANDMENTS
1.CORONAL PLANE
valgus – NA
upto 3deg varus- Accep.
2.SAGITTAL PLANE
3.VARUS AND VALGUS STRESS in ext.
4.FEMOROTIBIAL TRACKING SHOULD BE
UNIFORM AT 0 – 90 DEGREES
5.AND 6.POLO in 90. flexion
7.MID FLEXION INSTABILITY
8.EXCESSIVE ROLLBACK
9.SPACER BLOCK-FLEXION TO EXTENSION –
UNAIDED , UNASSISTED AND
UNINTERRUPTED
( rectangular gaps )
( without trial implants )
10.PATELLAR TACKING
patella should glide freely in the trochlear notch
ADDITIONAL - WATER TIGHT CLOSURE
KINEMATIC ALIGNMENT
Kinematic Alignment in TKA: Definition, Surgical Technique, and Challenging Cases
Article · January 2012
MS Thesis Project View project
Stephen Miller Howell University of California, Davis
Maury L. Hull University of California, Davis
• Introduced in 2006 – Howell
• Aim is to restore the 3 axis around which
the knee moves
• Normal knee has single radius from 0-150
flexion
2.The transverse axis in the femur
about which the patella flexes and
extends is proximal, anterior and
parallel to the above
1.The transverse axis in the femur
about which the tibia flexes and
extends passes through the center
of the medial and lateral femoral
condyles, which are symmetric in
the varus and valgus knee
3.Both transverse axes in the
femur are perpendicular to the
longitudinal axis about which
the tibia internally and externally
rotates on the femur
Cementing
1. High viscosity cement
2. Tkr – no role of antibiotic cement
3. Under tourniquet
4. Maintain ot temperature, sterility
5. Monitor for adverse reactions
6. Adequate hemostasis – closure
Thank you .
Steps total knee replacement

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Steps total knee replacement

  • 1. BASIC SURGICAL TECHNIQUE – TKA Dr Aditya Apte Sunshine hospitals
  • 2.
  • 3.
  • 4.
  • 6. Originally described by Von Langenback later modified by Robert jones and Insall * Proximal medial border of quadriceps tendon – medial border preserved * Point halfway between medialis insertion and superomedial pole of patella * Medial border of tibial tubercle
  • 7.
  • 10. STEP 1 : REMOVAL OF OSTEOPHYTES UNDER MCL
  • 11. STEP 2 : CLEARING FEMORAL NOTCH
  • 12. STEP 3 : REMOVAL OF INFRAPATELLAR PAD OF FAT
  • 13. STEP 4 : CLEARING SUPRAPATELLAR SYNOVIUM
  • 14. STEP 5- Inverted Isosceles Triangle
  • 15. STEP 6 : CLEARING OF PATELLOFEMORAL OSTEOPHYTES + DEBULKING
  • 16. ALIGNMENTS IN TKR 1. ANATOMICAL ALIGNMENT 2. MECHANICAL ALIGNMENT • MEASURED RESECTION • GAP BALANCING 3. KINEMATIC ALIGNMENT
  • 17. ANATOMICAL ALIGNMENT • Hungerford and Krackow • Anatomically recreate the joint line • Femoral cut at 8-9°of valgus combined with the 2-3° varus tibial cut
  • 18. Anatomic alignment (a) attempts to mimic the natural knee by cutting the tibia at 3° varus to the mech f the tibia and a distal femoral cut that is 9° valgus to the mechanical axis of the femur to recreate a 6° line. Mechanical alignment (b) involves a tibial cut that is perpendicular to the mechanical axis of the ti distal femoral cut 6° valgus to the anatomic axis (perpendicular to the mechanical axis) of the fem
  • 19. MECHANICAL ALIGNMENT Insall - Femoral and Tibial cut perpendicular to the mechanical axis Insall - 1.the knee joint aligned through the anatomical alignment may be loaded more medially with a medial tibial plateau fixation failure. 2. cuts perpendicular to mechanical axis
  • 20. a. measured resection- bony landmarks ( preserve joint line ) b. gap balancing- ligament tension c. combined / modern
  • 23. ENTRY ''Starting point for femoral IM rod insertion is made 8-10mm anterior to the origin of the PCL, And slightly medial to the midportion of the intercondylar notch'' ''A correct thickness of distal femoral cut just skims the roof of intercondylar notch'' Operative techniques in Orthopaedic Surgery Sam W.Wiesel (publisher) Lippincott Williams & Wilkins 1 st Edition (2011) Tips and tricks in total knee arthroplasty BhavukGarg*, GauravSharma**, RajeshMalhotra***
  • 24.
  • 25. INTRAMEDULLARY GUIDE • AIM is for DFC to be perpendicular to Mechanical axis • Identify the VCA • General – • Varus – 5 to 7 degree valgus cut • Valgus knees – 0 to 3 degree valgus cut
  • 26. Distal Femur Cut Anterior Chamfer Cut Posterior Cut Anterior Cut Posterior Chamfer Cut • - Distal femur cut corelates with thickness of metallic femoral component provides - Varus/ valgus alignment - Flexion/ extension - Proximal/ distal position
  • 27. Femur component aligned in varus Femur component aligned in valgus Femur component aligned in neutral varus/ valgus position Distal femur cut in frontal view
  • 28. Femur component aligned in extension Femur component aligned in flexion Femur component aligned in 0° flexion/ extension Distal femur cut in Sagittal view
  • 30.  In general, for each 10° of flexion contracture - additional 2mm resection Severe FFD
  • 31. STEP 7: FEMUR SIZING
  • 32. POSTERIOR REFERENCING- RISKS ? ANTERIOR REFERENCING- RISKS ?
  • 33. PLACING OF THE 4 IN 1 CUTTING BLOCK AIM – Prosthesis must be in External rotation
  • 34.
  • 35. • TRANSEPICONDYLAR AXIS : Lateral epicondyle - apex of bony prominence Medial epicondyle: Apex of the medial prominence -Anatomical TEA Medial sulcus -Surgical TEA . . POSTERIOR CONDYLAR AXIS : in 3-5 degree of IR / valgus
  • 36. • ANTEROPOSTERIOR AXIS(WHITESIDES LINE): 1. Line connecting the lowest point of the patellar groove and the top of the intercondylar notch. 2. Femoral component rotation is oriented perpendicular to it 3. easily identified / reproducible
  • 38. STEP 8 : 4 IN 1 block 1. ANTERIOR AND POSTERIOR FEMUR CUTS – DETERMINE ROTATION, FEMORAL COMPONENT POSITION 2. ANTERIOR AND POSTERIOR CHAMFER CUTS – For accomodation of prosthesis
  • 39. 1. Anterior – notching , piano sign 2.Posterior – protect mcl, popliteus
  • 40. STEP 9 : BOX CUT
  • 41. • COMPONENTS – SUBPERIOSTEAL ELEVATION OF DEEP MCL – HYPERFLEXION OF KNEE – EXTERNAL ROTATION OF LEG – DELIVERING TIBIA FORWARD RANSALL MANOUVRE RANAWAT+INSALL
  • 42. STEP 10 : PROXIMAL TIBIAL CUT 1. AIM – Tibial cut must be made perpendicular to the mechanical/anatomical axis of tibia 2. Method a) Intramedullary alignment guide b) Extramedullary alignement guide
  • 43. • Landmarks – Proximal landmarks • Anterior to origin of PCL • Medial third of tibial tuberosity – Distal landmarks • Centre of ankle • Second Metatarsal • EHL EXTRAMEDULLARY ALIGNMENT GUIDE ''An aid to tibial alignment in total knee replacement NJ COOKE, R BURNETT''
  • 44.
  • 46. PROXIMAL TIBIA CUT - Proximal/ distal position - Varus/ valgus alignment - Posterior/ anterior slope KEEL PREPARATION - Anterior/ posterior position - medial/ lateral position - rotation Proximal Tibia Cut
  • 47. Tibia component aligned in valgus Tibia component aligned in neutral varus/ valgus position Tibia component aligned in varus Frontal View
  • 48. Tibia component with posterior slope Tibia component neutrally aligned, no slope Tibia component with anterior slope Sagittal View
  • 49. POSTERIOR TIBIAL SLOPE • Range – Between 0 to 7 degrees • Indian population – 11.54 degrees Standard Deviation of 4.5 Exceptions malunited IA fractures Post HTO Mastering techniques in Orthopaedic surgery Knee arthroplasty Paul A.Lotke Correlation of posterior tibial slope with Metadiaphyseal angle in TKA – Indian population Shuhrashnu S Mohanty
  • 50. EXTENSION GAP CONFIRMED WITH SPACER BLOCK
  • 51. FLEXION GAP CONFIRMED WITH SPACER BLOCKS
  • 52. EQUAL SIZE FLEXION AND EXTENSION GAPS
  • 54. Rotational alignment of the tibial component in total knee arthroplasty is better at the medial third of tibial tuberosity than at the medial border Jörg Lützner,1 Frank Krummenauer,2 Klaus-Peter Günther,1 and Stephan Kirschner1 TIBIAL PREPARATION AND SIZING Which Rotational Reference for Tibial Component is optimal in Total Knee Arthroplasty? + 1 Mitsuyasu, H; 1Matsuda, S; 1 Fukagawa, S; 1Miura, H; 1Okazaki, K; 1, 2Tashiro, T; 1Kawahara, S; 1 Iwamoto, Y + 1Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka City, Japan 2Department of Advanced Medicine and Innovative Technology, Kyushu University Hospital, Fukuoka, Japan •Sizing – A-P of lateral plateau of tibia •Rotation – • Anatomic landmarks a) Anteromedial border(if not involved in disease process) b) alignment c) akagi line d) free floating technique
  • 56. • Flexion / extension first • Proximal tibia + distal femur cut • Balance gaps and perform releases • Complete cuts
  • 57.
  • 58. Knee at 90 degrees of flexion and the collateral ligaments equally tensioned using laminar spreaders. Note the transepicondylar axis is parallel and anterior-posterior axis is perpendicular to the resected proximal tibia.
  • 59. Placement of the anteroposterior femoral cutting block parallel to the resected proximal tibia with each collateral ligament tensioned to create a rectangular flexion gap.
  • 60. * Precise proximal tibial resection is critical when using a gap balancing technique * Varus tibial resection will result in increased internal rotation of the femoral component * Valgus tibial cut will lead to excessive external rotation of the femoral component. * Over- or under-resection of the femoral or tibial bone resections can lead to a mismatch of flexion and extension gap dimensions.
  • 61. • Modern / combined technique- • 1. distal femur cut • 2. proximal tibia • 3. balance in extension • 4. complete femur prep. • 5. balance in flexion
  • 63. 1.CORONAL PLANE valgus – NA upto 3deg varus- Accep.
  • 65. 3.VARUS AND VALGUS STRESS in ext.
  • 66. 4.FEMOROTIBIAL TRACKING SHOULD BE UNIFORM AT 0 – 90 DEGREES
  • 67. 5.AND 6.POLO in 90. flexion
  • 70. 9.SPACER BLOCK-FLEXION TO EXTENSION – UNAIDED , UNASSISTED AND UNINTERRUPTED ( rectangular gaps ) ( without trial implants )
  • 71. 10.PATELLAR TACKING patella should glide freely in the trochlear notch
  • 72. ADDITIONAL - WATER TIGHT CLOSURE
  • 73. KINEMATIC ALIGNMENT Kinematic Alignment in TKA: Definition, Surgical Technique, and Challenging Cases Article · January 2012 MS Thesis Project View project Stephen Miller Howell University of California, Davis Maury L. Hull University of California, Davis
  • 74. • Introduced in 2006 – Howell • Aim is to restore the 3 axis around which the knee moves • Normal knee has single radius from 0-150 flexion
  • 75. 2.The transverse axis in the femur about which the patella flexes and extends is proximal, anterior and parallel to the above 1.The transverse axis in the femur about which the tibia flexes and extends passes through the center of the medial and lateral femoral condyles, which are symmetric in the varus and valgus knee 3.Both transverse axes in the femur are perpendicular to the longitudinal axis about which the tibia internally and externally rotates on the femur
  • 76. Cementing 1. High viscosity cement 2. Tkr – no role of antibiotic cement 3. Under tourniquet 4. Maintain ot temperature, sterility 5. Monitor for adverse reactions 6. Adequate hemostasis – closure