J Bone Joint Surg Br. 2009 Apr;91(4):426-33.
Musahl V, Tarkin I, Kobbe P, Tzioupis C, Siska PA, Pape HC.
Reviewed by
Dr Terry Stephens
BSc(hons), MBBS, PhD |
Unaccredited Orthopaedic Registrar
Introduction
- Treatment Principles
- anatomical reduction
- rigid fixation
- early movement
- Traditional methods
- extensive dissection
- periosteal stripping
- compromising vascular supply
- Problems
- infection
- non-union
- secondary bone grafting
- loss of reduction
- locking plates & minimally invasive approaches
- preserves the soft tissue envelope
Meniscal injuries
- not all need to be repaired
- 90% lateral meniscal injuries (gardner et al 2005)
- medial meniscus associated with medial fractures
Ligament injuries
- bicondylar fractures
- acl (57%),
- pcl (28%),
- lcl (57%),
- mcl (36%)
- lateral collateral – medial fractures
- medial collateral – lateral fractures
- plc and pcl – anterio-medial fractures
Surgical Approach
- single incision
- commonly anterior lateral incision
- allows approach for later arthroplasty
- tips
- 1st reduce proximal lateral condyle
- 2nd intercondylar reduction
- commonly anterior lateral incision
- two incision
- required if cortical contact between condylar fragments is inadequate
- small medial incision (maintain large skin bridge)
- anti-glide plate or medial locking plate
Minimally Invasive Approach
- decreased
- deep infections
- arthrofibrosis
- post traumatic arthritis
- 13% loss of reduction
Special Situations
- posterior plateau fractures
- posterior lateral
- fibular osteotomy
- posterior medial fractures
- posterior medial incision
- posterior lateral
- high energy bicondylar fractures
- often require dual incisions
Locking plates
- unnecessary
- simple lateral splits
- cannulated lag screws
- x2 more biomechanically stable than x3
- if large anatomically contoured anti-glide plate
- cannulated lag screws
- splits lateral depression
- buttress plate or peri articular plate
- with bone graft to elevate cartlidge
- medial condyle fractures
- lag screw
- buttress plate (to avoid shear forces)
- large
- communited
- simple lateral splits
- useful
- high energy fractures
- comminution
- osteoporotic bone
- advantages
- single lateral approach
- preserves soft tissue envelope
- combine with compression lag screws
dual plating offers most stable construct
Arthroscopy and Fluoroscopy
- adequate reduction can be achieved with either.
- Increased risk of compartment syndrome with arthroscopy
ilizarov
- severe comminution
- similar results for orif
Clinical outcomes
- difficult to assess
- very diverse range of injuries
- articular reduction important
- 10mm lucht & pilgaard 1971
- 5mm rasmussen et al 1973
- 2mm barei et al 2006
- difficult due to diverse type injury and therefore studies lacking
- favourable result
- low-energy injuries
- lateral meniscus preservation
- high energy – articular displacement and anatomical reduction.
Complications
- infection 5 -15%
- correlates with soft tissue injury and amount of metal
- large surgical wounds
- infection rates still high with mi techniques
- avn
- particularly dual plating
- non union
- mal union
- malposition
- post traumatic arthritis
- stiffness with external fixation
Total Knee Replacement
- high rates of wound problems and infections
- related to multiple incisions and soft tissue compromise
- recommend most healed incision and most lateral incision
- satisfactory functional outcome