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M.4

®

s  

Dear Patient, 

Your doctor has prescribed the 

functional knee brace M.4s for you. 

Please read through these  

instructions carefully to help ensure 

that you fit your brace correctly.

Indications

• 

Ruptures of the anterior or both 
cruciate ligaments with accompanying 
injuries

• 

Isolated ruptures of the anterior 
cruciate ligament

• 

Ruptures and/or instability of the 
collateral ligaments

• 

After reconstruction of the anterior  
or both cruciate ligaments

• 

For conservative treatment of knee 
joint instability 

Contraindications

None known at present.

Setting the flexion / extension limits

Extension limit wedge, silver:  
0°, 10°, 45°
Flexion limit wedge, black:  
0°, 10°, 45°, 90°, 120°
Can be immobilised at:  
0°, 10°, 45°
For immobilising the orthosis first insert 
the flexion wedge and then the 
corresponding extension wedge. The 
medial (inside) and the lateral (outside) 
wedge settings must always be the 
same.
1.  10° extension and 90° flexion wedges 

are pre-installed in your knee brace  
as standard (In the UK only 10° 
extension wedges fitted, remainder 
included as spare parts). 

2.  To change the wedges, simply remove 

the joint cover. 

3.  Replacement extension wedges 

(silver) can be found in the wedge set 
marked ‘R-E’ and ‘L-E’. Slide the new 
wedge into the joint from the front, 
and secure it by tightening the screws. 
Insert the wedge so that the letter 
shown on the joint plate points 
upwards (R or L). Now insert the screw 
in the thread and screw it tighten. 

4.  To replace the black flexion wedge 

loosen the screw and pull the wedge 
out from the back of the orthosis. 
Select the suitable wedge from the 
wedge set marked ‘R-F’ and ‘L-F’. Insert 
the wedge so that the letter shown on 
the joint plate points upwards (R or L). 
Now insert the screw in the thread 
and screw it tighten.

5.  Bend and flex the brace ‘joint’ a couple 

of times and check that the wedges 
are positioned correctly. Finally, 
secure the joint cover.

Important notes

Only change the extension and flexion 
limits on instruction from your doctor  
or orthotist. In order to prevent  
hyperextension, always insert extension 
wedges or 0° wedges. The wedges define 
the exact excursion of the orthosis. In 
difficult soft-tissue conditions, e.g. 
where the soft-tissues are under 
compression, it may be necessary to 
insert the larger wedge to limit the joint 
movement to the desired excursion. In 
addition, make sure that the orthosis 
joints are correctly positioned: the 
middles of the joints should be level with 
the upper border of the patella. The joint 
must lie behind the midline of the leg. 

Shaping the orthosis 

When shaping the orthosis, please 
ensure that the joints stay parallel. This 
guarantees that the orthosis will 
function well and run easily and that 
there is no excessive wear.  

E010558_GA_M4s_CI.indd   4

18.01.13   11:25

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