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Seriously! After reading this article, I selected a suitable prosthetic foot board ( An optional foot board essential)
2021-08-10 Hits：
According to the needs of different patients, there are several types of prosthetic ankles.
First of all, before introducing the foot board for leg prosthesis, we should pay attention to the fact that the foot board for leg prosthesis can be roughly divided into integral type and separated type. Most of the foot boards for leg prosthesis are separated type, and the integrated foot board is seldom used.
At the same time, the types of separated foot plate are more various, and the performance of different products is different, so we mainly introduce separated foot plate in the aspect of leg prosthesis collocation.
A foot board is usually a strong piece made of plastic or other material (typically divided into solid ankles and fixed heels), and is usually suitable for low activity levels.
The integrated foot board can also be divided into movable ankle and static ankle. Movable ankle can adjust the front and back positions of the ankle, while static ankle is an unadjustable whole.
The separated foot plate is more common in the collocation of lower leg prosthesis, and its structure is composed of two parts: an independent decorative shell and a carbon fiber foot plate. The independent mechanical foot plate has more complex structure and more powerful functions than the integrated foot plate, while the decorative shell is used to fix the position of the foot plate and make the prosthesis more beautiful.
At the same time, the types of separated foot plate are more various, and the performance of different products is different, so we mainly introduce separated foot plate in the aspect of leg prosthesis collocation.
A foot board is usually a strong piece made of plastic or other material (typically divided into solid ankles and fixed heels), and is usually suitable for low activity levels.
The integrated foot board can also be divided into movable ankle and static ankle. Movable ankle can adjust the front and back positions of the ankle, while static ankle is an unadjustable whole.
The separated foot plate is more common in the collocation of lower leg prosthesis, and its structure is composed of two parts: an independent decorative shell and a carbon fiber foot plate. The independent mechanical foot plate has more complex structure and more powerful functions than the integrated foot plate, while the decorative shell is used to fix the position of the foot plate and make the prosthesis more beautiful.
Structural classification of the ankle
Low activity prosthetic ankle: it does not have any function of movement, and is mainly applicable to children, the elderly and the infirm.
High activity prosthetic ankle:it does not have any function of mobility, mainly suitable for high activity requirements, such as professional athletes.
Uniaxial prosthetic ankle: it can imitate the anterior and posterior motion function of human ankle, and is suitable for people who have low requirements for ankle function.
Multi-functional prosthetic ankle: it can simulate the functions of the human ankle in different directions. It has a general adaptability to the road surface and a limited range of motion.
There is a certain relationship between ankle shape and structural height. The structural height of c-type ankle and straight ankle can reach at least 12-13cm, while the low ankle plate below 10CM generally has no ankle structure, and its performance is more dependent on the structural design of the sole and heel.
In addition to the above more conventional ankle, there are new ankle designs in recent years, respectively, the universal ankle, hydraulic ankle and intelligent ankle.
mecanum ankle flexible and light!
Multi-axis mechanical design can be used to simulate the functions of the human ankle, such as pronation and valgus when lifting and lowering the foot board and the bottom of the foot. This design can adapt to uneven terrain and requires high balance ability, which is not applicable to the elderly.
The hydraulic ankle is composed of a base, a transmission device and a hydraulic device, which is characterized in that the base comprises a ball seat with a hemispherical groove in the center, a ball cover and a connecting plate, which are fixed by screws.
The ball at the lower end of the cue is embedded in the middle of the ball seat and the ball cover, and the upper end is through the cue mouth, and the connecting plate and the connecting rod are connected with the connecting sleeve.
Intelligent ankle is generally a hydraulic ankle with built-in microprocessor. You can use APP or remote control to adjust the foot to a certain extent, such as adjusting the heel height, the range of motion of mechanical structure and damping, etc. Its products are diverse, and different companies' intelligent ankle have their own characteristics.
And can adjust the Angle or damping of the ankle joint according to the change of the external environment, can adapt to the complex road surface, the movement of the prosthetic foot is easy and smooth.This paper introduces the research progress and development trend of passive and active intelligent ankle foot prosthesis.
Multi-functional prosthetic ankle: it can simulate the functions of the human ankle in different directions. It has a general adaptability to the road surface and a limited range of motion.
There is a certain relationship between ankle shape and structural height. The structural height of c-type ankle and straight ankle can reach at least 12-13cm, while the low ankle plate below 10CM generally has no ankle structure, and its performance is more dependent on the structural design of the sole and heel.
In addition to the above more conventional ankle, there are new ankle designs in recent years, respectively, the universal ankle, hydraulic ankle and intelligent ankle.
mecanum ankle flexible and light!
Multi-axis mechanical design can be used to simulate the functions of the human ankle, such as pronation and valgus when lifting and lowering the foot board and the bottom of the foot. This design can adapt to uneven terrain and requires high balance ability, which is not applicable to the elderly.
The hydraulic ankle is composed of a base, a transmission device and a hydraulic device, which is characterized in that the base comprises a ball seat with a hemispherical groove in the center, a ball cover and a connecting plate, which are fixed by screws.
The ball at the lower end of the cue is embedded in the middle of the ball seat and the ball cover, and the upper end is through the cue mouth, and the connecting plate and the connecting rod are connected with the connecting sleeve.
Intelligent ankle is generally a hydraulic ankle with built-in microprocessor. You can use APP or remote control to adjust the foot to a certain extent, such as adjusting the heel height, the range of motion of mechanical structure and damping, etc. Its products are diverse, and different companies' intelligent ankle have their own characteristics.
And can adjust the Angle or damping of the ankle joint according to the change of the external environment, can adapt to the complex road surface, the movement of the prosthetic foot is easy and smooth.This paper introduces the research progress and development trend of passive and active intelligent ankle foot prosthesis.
The structures and definitions of these ankles can be mixed, resulting in ambiguous concepts such as the "bionic ankle" and a variety of products.
In addition, there are some targeted ankle design, such as the Angle of the ankle can be adjusted to suit the heel heel.
Structural classification of soles of feet
In addition to the structural differences in the design of the different foot plates in the ankle, the bottom of the foot is also a structural difference.
We can divide these design differences into three points: toe separation, number of carbon layers and moment arm.
What cent toe points to is whether the soleplate forges from the middle, and from what position forges.
There are two types: middle palm toe parting (full and half toe parting) and herringbone toe parting. The middle palm toe parting makes the foot board more adaptive, and the farther back the fork position is, the better the inside and outside turn of the foot board is, which helps to maintain balance and ease the impact on the receiver cavity and the stump. The herringbone toe parting makes the foot board suitable for slippers and sandals.
We can divide these design differences into three points: toe separation, number of carbon layers and moment arm.
What cent toe points to is whether the soleplate forges from the middle, and from what position forges.
There are two types: middle palm toe parting (full and half toe parting) and herringbone toe parting. The middle palm toe parting makes the foot board more adaptive, and the farther back the fork position is, the better the inside and outside turn of the foot board is, which helps to maintain balance and ease the impact on the receiver cavity and the stump. The herringbone toe parting makes the foot board suitable for slippers and sandals.
Carbon lamination refers to the fact that the bottom of the foot is made up of several layers of carbon fiber, which can support a higher level of activity and a degree of physical activity.
And multilayer carbon plate products generally have better inside and outside turn effect and structural strength.
Moment arm refers to the position of the fulcrum in the foot board, divided into full length moment arm and half long moment arm.
The full-length moment arm baseboard is similar to the length of the healthy foot, providing better support for the baseboard during walking, making the gait smoother, and reducing the impact of the healthy side foot during walking.
(Full-length moment arm foot is better for lower leg prosthesis).
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