|
|
| |
¡¡Deluxe
Series Knee Prosthesis |
|
| |
| |
| Deluxe Series artificial knee joint is the newly
developed product based on the market demand by
our company. |
|
|
| |
¡¡Characteristics
of The Product |
|
| |
| |
¡ñThe design is in
conformity with anatomical size of the knee joint,
increasing the covered surface of the bone by the
prosthesis
The Deluxe series knee prosthesis is designed on
the basis of the data obtained from the accurate
analysis of anatomical information from 105 patients,
concerning the shape and size of their distal end
of femur, proximal end of tibia and patella. After
the study of the geometrical data of the articulating
surfaces of the distal end of femur, proximal end
of tibia and patella, we determined the ratio between
the inside and outside diameter and the ratio between
the anteroposterior diameters of the distal end
of femur and the proximal end of tibia. As a result,
the covered area of the bone is increased and the
bone absorption, as well as the prosthesis sinking,
due to the uneven distribution of local stress on
the cutting surface, is avoided. The uneven distribution
of local stress is the result of poor covered area
of the bone by the prosthesis. |
|
|
| |
¡¡Characteristics
of the product |
|
| |
| |
The configuration of curvature contact stress
plane on plane (upper) and curve on curve (down) |
|
¡ñ
Good design of anastomosis curve on curve between articulating
surfaces
Tibial-femoral articulating surface: the curve on curve
design, even distribution of stress
The design is of good curve on curve anastomosis between
the tibial-femoral articulating surfaces. This design
makes the stress of contacting surfaces more even during
the movement of the knee joint. With the analytical result
of Element-limited Method, the result shows that if the
two articulating surfaces are not well contacted, compared
with the contact plane on plane, this design (the curvature
radius of the coronary surface: 70 mm for femur component;
72 mm for tibia insert) is better. It can decrease the
increase of the contact stress, decreasing the wear of
the insert, which is made from UHMW-PE.
¡ñ Patellofemoral articulating
surfaces: Rounded patella prosthesis, inlaid design
The patella component is of inlaid design in conformity
with the current design trend. Compared with the overlaid
design, the inlaid design can increase the contacted
area between the patella prosthesis and the patella,
so as to avoid the loosening of the patella component.
Besides, the design of rounded patella prosthesis and
the fixation of central single post with bone cement
makes it easy to do the operation.
|
|
| |
¡¡Characteristics
of the product |
|
| |
| |
| |
¡¡Characteristics
of the product |
|
| |
| |
The locked mechanism between the UHMW-PE insert
and the metal base, to prevent the micro motion
in the direction of forward and backward, as well
as the rotation |
|
¡ñFine
insert material and strict workmanship
The material and process used in the making of UHMW-PE
insert will affect the service life of the knee prosthesis.
Since the thickness of insert is limited, the more wearable
the material is, the longer the service life.
In order to guarantee the service life of the knee prosthesis,
we have imported UHMW-PE and have been processing them
with the process generally accepted in the world. The
wear resistance of the UHMW-PE insert is in conformity
with the requirement of the modern knee prosthesis.
¡ñThe reliable design of the locked
mechanism between the insert and metal base, avoiding
the wear of micro motion between the interfaces
The wear of the bottom surface of the UHMW-PE insert
is a newly-found clinic problem. The reason for the
wear at the bottom surface is that the micro dislocation
takes place between the insert surface and the metal
base during the joint working. After a long time, the
micro motion will result in the debris of UHMW-PE and
the separation of the insert and the metal base. Therefore,
in the design of the knee prosthesis, we have paid more
attention to the fixed mechanism between the insert
and the base, so as to decrease the micro motion and
the wear of the micro motion.
|
|
| |
¡¡Characteristics
of the product |
|
| |
| |
¡ñThe fine design guarantees
that good match of different specifications between
femur and tibia components
On all the coronal surfaces of the knee prosthesis,
the distance between the lowest point on the femoral
and tibial inserts of various specifications and
the center of the knee prosthesis is all 16 mm.
The width between the condyluses of the femoral
component with various specifications and the width
of the insert stake are the same. This kind of design
will guarantee the femoral components and tibia
components with different specifications could match
each other well so as to make the operation easier.
The location of the lowest point of the curvature
on the coronal surface of the femoral components
with various specifications is equal to those
of the tibia components, the width between the
condyluses of the femoral component with various
specifications and the width of the insert stake
are the same. The components with various specifications
could match with each other well.
|
|
|
| |
¡¡Characteristics
of the product |
|
| |
| |
¡ñThe design of the flexion
could meet the requirement in daily life
In the Deluxe series knee prosthesis, the
maximum flexion is 134.5o, which could meet the
requirement of most of the patients in their daily
life.
 
The most flexion angle, simulated by computer
|
|
|
| |
¡¡Total
2 Pages Currently Page 1¡¡£ÛNext£Ý |
|
Product
List
Hip
Prosthesis
¡¡¡¡¡¡