Patent Application
20140188239
The disclosed device and method generally relate to hammertoe correction implants and devices.
A hammertoe or contracted toe is a deformity of the proximal inter-phalangeal joint of the second, third, or fourth toe causing it to be permanently bent and giving it a semblance of a hammer Initially, hammertoes are flexible and may be corrected with simple measures but, if left untreated, hammertoes may require surgical intervention for correction. Persons with hammertoe may also have corns or calluses on the top of the middle joint of the toe or on the tip of the toe and may feel pain in their toes or feet while having difficulty finding comfortable shoes.
Various treatment strategies are available for correcting hammertoes. Conventionally, the first line of treatment for hammertoes includes employing new shoes having soft and spacious toe boxes. Additionally, toe exercises may be prescribed to stretch and strengthen respective muscles, e.g., gently stretching one's toes manually, using the toes to pick up things off the floor, etc. Another line of treatment may include employing straps, cushions or non-medicated corn pads to relieve symptoms. An addition method of treatment may include correction by surgery if other non-invasive treatment options fail. Conventional surgery usually involves inserting screws, wires or other similar implants in toes to straighten them. Traditional surgical methods generally include the use of Kirschner wires (K-wires). Due to various disadvantages of using K-wires, however, compression screws are being employed as a better implant alternative as K-wires require pings protruding through the end of respective toes due to their temporary nature. As a result, K-wires often lead to pin tract infections, loss of fixation, and other conditions. Additional disadvantages of K-wires include migration and breakage of the K-wires thus resulting in multiple surgeries.
Screw implants, however, may provide a more permanent solution as such implants do not need removal and thus have no protruding ends. Further, with the use of screw implants, a patient may wear normal footwear shortly after the respective surgery. Conventional screw implants possess a completely threaded body and do not provide a flexibility to the respective toe in its movement, i.e., conventional implants provide a pistoning effect. Furthermore, conventional screw implants are made for strong bones and are unsuitable for treatment of patients having weak bones which is a predominant reason why K-wire surgical implants are still employed despite their several disadvantages. Accordingly, there remains a need for developing hammertoe implants and devices including compression screw which are not only stable but provide adequate compression across a joint.
Other objects, features, and advantages of the present invention will be apparent from the following description when read with reference to the accompanying drawings. In the drawings, wherein like reference numerals denote corresponding parts throughout the several views.
With reference to the figures, where like elements have been given like numerical designations to facilitate an understanding of the present subject matter, the various embodiments of a double thread hammertoe compression device are described.
It should be noted that the figures are not necessarily to scale and certain features may be shown exaggerated in scale or in somewhat schematic form in the interest of clarity and conciseness. In the description, relative terms such as “horizontal,” “vertical,” “up,” “down,” “top” and “bottom” as well as derivatives thereof (e.g., “horizontally,” “downwardly,” “upwardly,” etc.) should be construed to refer to the orientation as then described or as shown in the drawing figure under discussion. These relative terms are for convenience of description and normally are not intended to require a particular orientation. Terms including “inwardly” versus “outwardly,” “longitudinal” versus “lateral” and the like are to be interpreted relative to one another or relative to an axis of elongation, or an axis or center of rotation, as appropriate. Terms concerning attachments, coupling and the like, such as “connected” and “interconnected,” refer to a relationship wherein structures are secured or attached to one another either directly or indirectly through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise. When only a single machine is illustrated, the term “machine” shall also be taken to include any collection of machines that individually or jointly execute a set (or multiple sets) of instructions to perform any one or more of the methodologies discussed herein. The term “operatively connected” is such an attachment, coupling or connection that allows the pertinent structures to operate as intended by virtue of that relationship. In the claims, means-plus-function clauses, if used, are intended to cover the structures described, suggested, or rendered obvious by the written description or drawings for performing the recited function, including not only structural equivalents but also equivalent structures. The terms “implant” and “device” are used interchangeably in this disclosure and such use should not limit the scope of the claims appended herewith.
Embodiments of the present subject matter provide a surgeon stability and compression across proximal or distal interphalangeal joints while maintaining simplicity of a hammertoe fusion. Exemplary embodiments may feature a double-ended threaded device, each end having a pitch (disparate or otherwise) that, when implanted, provides compression across a targeted joint.
Exemplary implants 100 may be implanted into targeted bones by conventional methods. For example, an exemplary implant 100 may be implanted or installed via a retrograde approach between, for example, proximate and middle phalanxes in a foot. One skilled in the art will understand that the method described herein may be applied to the middle and distal phalanxes as well or other adjacent bones.
Although reference has been made to a patient's proximal and distal interphalangeal joints metatarsal phalangeal joint, one skilled in the art will understand that embodiments of the present subject matter may be implemented for other respective bones including, but not limited to other phalanges/digits and phalangeal/digital joints.
It may be emphasized that the above-described embodiments, particularly any “preferred” embodiments, are merely possible examples of implementations and merely set forth for a clear understanding of the principles of the disclosure. Many variations and modifications may be made to the above-described embodiments of the disclosure without departing substantially from the spirit and principles of the disclosure. All such modifications and variations are intended to be included herein within the scope of this disclosure and the present disclosure and protected by the following claims.
While this specification contains many specifics, these should not be construed as limitations on the scope of the claimed subject matter, but rather as descriptions of features that may be specific to particular embodiments. Certain features that are described in this specification in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable sub-combination. Moreover, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a sub-combination or variation of a sub-combination.
As shown by the various configurations and embodiments illustrated in
While preferred embodiments of the present subject matter have been described, it is to be understood that the embodiments described are illustrative only and that the scope of the invention is to be defined solely by the appended claims when accorded a full range of equivalence, many variations and modifications naturally occurring to those of skill in the art from a perusal hereof.
The present application is co-pending with and claims the priority benefit of the provisional application entitled, “Double Thread Hammertoe Compression Device,” Application Ser. No. 61/746,320, filed on Dec. 27, 2012 the entirety of which is incorporated herein by reference.
| Number | Date | Country | |
|---|---|---|---|
| 61746320 | Dec 2012 | US |
