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M.4®OA
FUNCTIONAL KNEE ORTHOSIS PROVIDING STABILITY AND OSTEOARTHRITIS PRESSURE RELIEF FOR THE ACTIVE PATIENT

3-POINT OFF LOADER FOR VARUS/VALGUS PRESSURE RELIEF



INDICATIONS
• conservative treatment of complex ligamentous instability, particularly in combination with unilateral osteoarthritis
• conservative treatment of advanced unilateral osteoarthritis
• post-operative pressure relief and compartmental protection after fractures of the tibial head, cartilage surgery, meniscus refixation, correction osteotomy
•

instability of the cruciate ligaments with pressure relief of the medial or lateral compartment


MODE OF ACTION
protection, stabilization, pain relief and restoration of mobility by:
• pressure relief of the medial or lateral joint compartment by the 3-point-principle which off-loads the affected compartment into a varus or valgus position
• stabilization of the knee joint to counteract knee instability which often causes osteoarthritis
• safeguards against hyperextension and offers limitation of flexion and extension



M4OA product photo



Physioglide logo

FOR PROTECTING, STABILIZING, RELIEVING PAIN AND RESTORING YOUR PATIENTS' MOBILITY
• exact and effective valgus or varus pressure exerted close to the knee joint
• wide, well cushioned frame padding for the 3-point pressure relief system
• malleable frame design to provide individual custom fit
• ultraflat, very light weight and non-protruding frame and hinge construction
• new Avional® aluminum frame material is 30% more rigid than other aluminum alloy technologies of the same weight
• Avional® aluminum alloy polycentric physioglide® hinges for strength
• anatomically premolded frame to reduce torsional forces



optimal prevention of migration -
4 key M.4®OA features
PHYSIOGLIDE® HINGE
• The mechanical movement of the physioglide® hinge closely matches the physiological roll-glide-movement of the knee joint. The shifting of the inner and outer hinge plates (see diagram) lengthens the physioglide® hinge at flexion and shortens it at extension. This effect reduces the "downward pressure" on the brace.

ANTI-MIGRATION CONDYLE PAD
• The top section of the half-moon shaped condyle pad is positioned above the medial condyle of the femur and helps prevent the M.4®OA from sliding.

SOFT-GRIP PADDING
• The M.4®OA's soft-grip padding material offers excellent patient comfort and is "slide resistant" to help secure the correct fit of the brace.

EASY AND CORRECT FITTING
• The numbered straps allow the patient to easily reproduce the correct fit of the brace.



M.4OA Product Features Photo

M.4®OA
version
size
circumference
article number
varus
(cm / inches) left right
varus/medial unloader
x-small
31-37 / 121/4"-141/2"
89121 89021
varus/medial unloader small 37-45 / 141/4"-173/4" 89122 89022
varus/medial unloader
medium
45-51 / 173/4"-20"
89123 89023
varus/medial unloader large 51-57 / 20"-221/2" 89124 89024
varus/medial unloader
x-large
57-65 / 221/2"-251/2"
89125 89025
varus/medial unloader xx-large 65-74 / 251/2"-29" 89126 89026
valgus
(cm / inches) left right
valgus/lateral unloader
x-small
31-37 / 121/4"-141/2"
89321 89221
valgus/lateral unloader small 37-45 / 141/4"-173/4" 89322 89222
valgus/lateral unloader
medium
45-51 / 173/4"-20"
89323 89223
valgus/lateral unloader large 51-57 / 20"-221/2" 89324 89224
valgus/lateral unloader
x-large
57-65 / 221/2"-251/2"
89325 89225
valgus/lateral unloader xx-large 65-74 / 251/2"-29" 89326 89226

measurement: circumference of thigh 15 cm (6 inches) above the center of the patella


DIAGNOSIS AND CHOICE OF THE APPROPRIATE ORTHOSIS

Anatomical shape of the legs varus-position valgus-position
varus diagram valgus diagram
Affected side medial

 lateral
Therapy off-loading of the medial
joint compartment		 off-loading of the lateral
joint compartment
Off-loading hinge lateral

 medial
Push principle applied varus/medial unloader

 valgus/lateral unloader
Orthosis M.4®OA
VARUS
right/left		 M.4®OA
VALGUS
right/left

15cm/6" measurement image image image image
CIRCUMFERENCE THIGH medial
osteoarthritis		 varus/valgus
adjustment		 offloading of the
medial compartment
with M.4®OA

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