Surgery – Truss – Perineal
Patent
1988-01-26
1989-05-30
Burr, Edgar S.
Surgery
Truss
Perineal
128 80C, 128 80F, 128 80R, A61F 500
Patent
active
048340782
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an ankle-joint orthosis comprising a foot receptacle embracing at least partially the metatarsus and the heel, as well as a shank receptacle embracing at least partially the lower leg to be enclosed, which is connected to said foot receptacle through a joint.
From the U.S. Pat. No. 4,320,748, a foot splint is known which comprises a foot receptacle embracing the metatarsus and the heel, as well as a shank receptacle, for the stabilization of bone fractures. The shank receptacle embraces the humeral muscular apparatus so as to achieve a stabilizing effect by way of muscle abduction of the muscular apparatus of the shank. A hinge joint is provided at the foot receptacle and comprises lattice-shaped extension pieces which can be connected to the corresponding counter-piece at the shank receptacle by way of a Velcro strip fastening system. Provisions are not made for a stabilization of the pro-supination motion in the tarsal joint.
From the German utility model 86 03 420 a joint orthosis is known for supporting and guiding the tarsus, which is constituted by two lateral tongues which are interconnected through a central cross bar and wherein the ends of the tongues may be fixed at the foot, If necessary, by a bandage or Velcro strip fasteners. In this orthosis, a U-shaped foot element comprises a base plate to afford support in terms of a tilting motion. At the level of the ankle, the tongues are extended respectively by a joint element with an adjustable field of angular freedom. The extension of the joint element is connected to a lateral element.
From the German patent application No. 25 16 945 laid-open for public inspection it is known to form an orthopaedic device from thermoplastic sections of a synthetic material.
The problem underlying the present invention consists in the provision of an ankle-joint orthosis of the type described by way of introduction, which contributes to the achievment of a stabilizing effect on the tarsal joint in cases of ligament instability as well as to guidance after injuries to the ligaments, while the talocrural articulation is retained whilst the ankle-joint orthosis can be easily matched to the foot involved in a simple manner. [Translator's remark: in spite of some missing letters the text could be correctly translated.]
This problem is solved by an ankle-joint orthopaedic prosthesis of the type described by way of introduction, which employes the features in the characterizing clause of Patent claim 1. The uncovering of the walking surface of the rear section of the foot enables the user of the orthosis to come into direct contact with the shoe when stepping on the heel. This is important for the feedback for the athlete's control of his muscles. The uncovering of the bulge of the muscular region of the calf results in avoidance of any compression that would affect the muscles of the calf. Since the position of the articulation relative to the foot receptacle can be chosen it has become possible to use the position of the fulcrum for the ankle-joint orthosis such that it will match the respective foot.
Further characteristics and expedient features of the present invention will result from the description of a particular embodiment with reference to the drawing. In the drawing:
FIG. 1 is a perspective side view of an ankle-joint orthosis;
FIG. 2 is a perspective partial view seen from the front;
FIG. 3 is a side view wherein the foot is indicated in broken lines; and
FIG. 4 is an exploded view of a joint.
The ankle-joint orthosis 1 comprises a foot receptacle 2 and a shank receptacle 3.
The foot receptacle 2 embraces and fixes the metatarsus in the form of a shell while addtionally the inside longitudinal arch and the front transverse arch of the metatarsus are included into the supporting action due to the envelopment by a corresponding plantar or sole zone 4 and lateral supporting zones 5, 6 integral therewith. In the heel zone, the two anatomically shaped supporting zones pass into a sufficiently raised wall 7 which affords a good em
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Berkemann et al, pp. 932-933, copy of German Abstract A61F-5/04, GM 8603420.
Asher Kimberly L.
Brown Donald
Burr Edgar S.
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