Principles of Fracture Healing Faik Altıntas M.D. Orthopaedic and Traumatology.
FRACTURE HEALING GENERAL PRINCIPLES OF ... -...
Transcript of FRACTURE HEALING GENERAL PRINCIPLES OF ... -...
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FRACTURE HEALINGGENERAL PRINCIPLES OF FRACTURE TREATMENT
CONSERVATIVE TREATMENT
INTERNAL FIXATION
Ferenc Urbán
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Function of the bone
• Primary mechanical – the skeleton holds the body weight, passive organ of movements
• Secondary biological – depot of microelements (Ca, P, etc), blood pool, blood cell producer
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Bones
Long (tubular) bones
Flat bones
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The structure of the bones
Cancellous bone Cortical bone
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Blood supply of the bones
• 4/5 intramedullar
• 1/5 periosteal
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Bone healing
• The aim is basicly to reconstruct the mechanical function
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Callus formation – secondary bone healing
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Direct angiogenic – primary bone healing
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The 3 Böhlerian rules
• Reduction
• Retention
• Rehabilitation
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A portion of fractures can be treated satisfactorily and with easily manageable conservative methods:
• plaster casts, braces• traction• functional therapy.
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Functional treatment
• No fixation is required• For example: Non displaced patellar fracture Compression fractures of the dorsolumbal spine without
neurological symptoms Beck index > 0.80
Fibular fractures in the proximal 2/3 Tile A pelvic fractures etc
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Plaster fixation
• „Lege artis”
• In diaphyseal fractures with fixation of the proximal and distal joints
• First time the plaster and soft bandage is cut to avoid strangulation
• Functional position
• Avoid pressure of nerves and vessels• Control of circulation, DVT prophylaxis
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Plastering
• Mathysen – Dutch army surgeon (1852-54)
• CaSO4
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Plastering
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„Plastic bandages”
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Braces
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Plaster and brace fixation
• Not only for conservative treatment
• It must be used for support after adaptive osteosynthesis
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Continous traction
Sceletal Soft tissue
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Pelvic and acetabular fx
•In the level of the bed
•In abduction
•1/7 of the body weight
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Proximal femoral (hip) Fx
• Braun splint
• Tuberositas tibiae extension
• 1/10 of body weight
• In the axis of the thigh bone
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Calcaneal extension in crural fracture
Maximum: 3 kg!!!
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Certain fractures can practically only be treated
surgically
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History• Stimson references techniques of
intramedullary fixation in which ivory pegs were jammed in the medullary canal in his 1883 textbook on fracture care.
• Hey-Groves probably inserted the first metallic intramedullary device in a gunshot fracture of the femur during World War I.
• Smith-Petersen applied a percutaneous medullary fixation technique to solve immobility problems associated with hip fractures in older patients.
• Küntscher's first report in 1939• Pauwels’ patellar tension bend wiring was
publicated by Heineck in 1909
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Early failures in the operative fracture treatment
• Anaesthesia
• Asepsis
• Lack of compression or controled micromovemenets
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Workgroup for development of internal fixation
• AO/ASIF (Arbeitsgemeinschaft für Osteosynthesefragen, Association for the Study of Internal Fixation) : Müller-Allgöwer-Willenegger-Schneider /Switzerland/
• Gerhard Küntscher Kreis
• Other workgroupsToday’s modern principles of osteosynthesis were worked up by the
AO
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Basic principles of the ASIF
• Anatomical reduction
• Stable fixation
• Saving blood supply
• Early functional treatment
Do not operate X-ray pictures!
-Fracture reduction and fixation to restore
anatomical relationships-Stability by fixation or
splintage, as the personality of the fracture
and the injury requires-Preservation of the blood supply to soft tissues and bone by careful handling
and gentle reduction techniques
-Early and safe mobilization of the part
and the patient
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The arguments supporting the use of surgical fracture
treatment:
Demand for faster fracture healingDemand for complete morphological and functional restitution Avoidance of the development of fracture illness
(algodystrophy)
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Following a long period of immobilization, there is a decrease in bone calcium
The joint capsule and ligaments contract and the joint will be stiff
Atrophy of muscles
Avoidance of the development of fracture illness and
algodystrophy
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the conservative treatment of a tibial fracture.Three weeks of traction in the hospitalThree weeks in a non-weight-bearing high
castA further six weeks in a walking cast
Three to six months of physical therapy following cast removal for the complete recovery of function.
With operative treatment, for example intramedullary nailing, this treatment period can be reduced to
six to eight weeks
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the two different types of fracture healing
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A prerequisite for primary or angiogenic healing of fractures is
absolutely stable immobilization
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Methods to achieve absolute stability:
lag screwscancellous screwsplates: DCP or Dynamic Compression PlateCompression with the tension deviceTension band principle
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Lag screw
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Herbert screw
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DC plate (dynamic
compression plate)
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LC-DC plate (low contact DC plate)
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Neutralization plate and compressor
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Secondary healing, or healing of a fracture
with callus also requires a certain stability,
however, it must not be as rigid and for this
reason is called relative stability
Relative stability: The fracture is only minimally stabilized so that the necessary micro-movement
remains. At this time fast secondary fracture healing occurs.
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The fracture is not reduced to its anatomical position, and only the
appropriate alignment adjustment is made
that the bone should be properly adjusted with regard
to axis, rotation and length
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Relative stability can be achieved:
Bridge platingExternal fixationIntramedullary fixation
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In bridge plating, the fracture zone is bridged by the plate
Bridge plating
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FIXATEUR EXTERNE
External fixation: The essence of this is that the fracture fragments are fixed
and stabilized with an external longitudinal frame made of bars or tubes
connected to wires or pins or Schanz screws
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Intramedullary nailing
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The different methods:Nailing with reaming
Nailing without reaming
Reaming: increases intramedullary pressure to 450-1510 hgmm!
By solid nail 1x!By reamed 12 mm nail 9X!
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Locking is considered static if the locking screws are inserted
through the round hole both proximally and distally to the
fracture. In this way the locking screws secure the longitudinal
stability as well.
In dynamic locking, a locking screw is inserted into one of
the oval holes. In this method compaction at the
fracture site may occur, thus the immobilization is dynamic
Advantages of lockingPreservation of the length of the
boneStability in rotation
Lower diameter of the nail is enoughWider indicatio
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Indication of operative fracture treatment
• Relative • Absolute
If a fracture can be treated by an operative procedure, it does not mean, that it has to be.
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Indications of operative treatment
• Open fractures• Impossible closed
reduction• Insufficient retention
by conservative method• Displaced joint
fractures• Salter-Harris III-IV.
type epiphyseal injuries• Distraction fractures• Non union, delayed union
• Replantation• Multiple fractures• Redisplacement• Pathological fractures• Shortening of
immobilisation period• Facilitate nursing• Fractures complicated
with nerve or vessel injuries
• Shortening of hospitalization
• Reaching earlier recovery
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Contraindication of internal fixation
• III. grade open fracture - relative
• Acut bone or soft tissue infection
• High grade osteoporosis - relative
• Insufficient blood supply or unstable scar tissue
• Weak general condition of the patient
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Disadvantages of internal fixation
• Risk of infection
• Evacuation of the fracture haematoma
• Arteficial damage of the blood supply
• Scar formation
• Risk of complications by the anaesthesia
• Transfusion complications
• Allergy, foreign body reaction
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Time of the operation
• Acut – within 6 hours – e.g. femoral neck fracture
• Delayed operation – e.g. calcaneal fracture
• Late, recontstructive operation – e.g. radial osteotomy
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Classification1 of internal fixations
• MIPO
Minimal invasive percutaneous osteosynthesis
• ORIF
Open reduction with internal fixation
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Classification2 of internal fixations
• Intramedullary fixation
Intramedullary nailing, gamma-nailing etc.
• Extramedullary fixation
Plate osteosynthesis, screwing, cerclage, etc.
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Classification3 of internal fixations
• Rigid (stable) osteosynthesis
Plates, compression screws
• Dynamic (relative stable) internal fixation
Intramedullary nail
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Stability of internal fixation
• Adaptational osteosynthesis – it needs support by external fixation
• Movement stable osteosynthesis
• Weight bearing stable osteosynthesis
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Adaptational OS
• Kirschner wiring
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Percutaneous K-wire fixation
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Intramedullary splinting
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Movement stable synthesis with
tension bend wire
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Tension bend wire effect
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Movement stable OS with screw fixation
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Mini screw fixation of the osteochondral fracture of the patella
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Weight bearing stable osteosynthesis
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been a new trend as plates have been developed with
threaded screw heads which lock within the body
of the plate.can be used on osteoporotic, poor
quality bone.
Principle of internal fixator
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Thank you for the attention!