Intermaxillary Fixation Device And Method Of Using Same
20220142690 · 2022-05-12
Inventors
Cpc classification
A61C7/00
HUMAN NECESSITIES
A61B17/60
HUMAN NECESSITIES
A61C5/007
HUMAN NECESSITIES
A61B17/8605
HUMAN NECESSITIES
International classification
A61B17/86
HUMAN NECESSITIES
A61B17/60
HUMAN NECESSITIES
A61C7/00
HUMAN NECESSITIES
A61C8/00
HUMAN NECESSITIES
Abstract
A medical apparatus including a bar with a first attachment loop, a second attachment and a plurality of hooks, wherein the medical apparatus is an arch bar.
Claims
1. (canceled)
2. A surgical method comprising the steps of: inserting a first screw through a first hole extending through a first plate and into a mandible; inserting a second screw through a second hole extending through the first plate and into the mandible; inserting a third screw through a third hole extending through a second plate and into a maxilla; inserting a fourth screw through a fourth hole extending through the second plate and into the maxilla; and attaching a first wire to the first plate and the second plate, the wire preventing movement of the mandible away from the maxilla.
3. The surgical method of claim 2, further comprising the steps of bending the first plate to the contour of the mandible and bending the second plate to the contour of the maxilla.
4. The surgical method of claim 2, wherein the attaching step includes attaching the first wire to a first hook monolithically formed with the first plate and a second hook monolithically formed with second plate.
5. The surgical method of claim 4, further comprising the step of attaching a second wire to a third hook monolithically formed with the first plate and a fourth hook monolithically formed with the second plate.
6. The surgical method of claim 5, wherein the first and second wires cross each other.
7. The surgical method of claim 2, further comprising the step of bending a first stem connecting the first hole to the first plate.
8. The surgical method of claim 7, further comprising the step of bending a second stem connecting the second hole to the first plate.
9. A surgical method comprising the steps of: determining a placement of a first plate on a mandible; determining a first position in the mandible for a first screw to pass through the first plate into the first position in the mandible; determining a second position in the mandible for a second screw to pass through the first plate into the second position in the mandible; determining a placement of a second plate on a maxilla; determining a third position in the maxilla for a third screw to pass through the second plate into the third position in the maxilla; determining a fourth position in the maxilla for a fourth screw to pass through the second plate into the fourth position in the maxilla; and determining a first connection point for a first wire to engage the first plate and a second connection point for a second wire to engage the second plate.
10. The surgical method of claim 9, further comprising the steps of determining a contour of the first plate to match the contour of the mandible and determining a contour of the second plate to match the contour of the maxilla.
11. The surgical method of claim 9, wherein the first connection point is a first hook monolithically formed with the first plate and the second connection point is a second hook monolithically formed with the second plate.
12. The surgical method of claim 9, further comprising the steps of: placing the first plate adjacent the mandible; inserting the first screw through the first plate and into the mandible at the first position; inserting the second screw through the first plate and into the mandible at the second position; placing the second plate adjacent the maxilla; inserting the third screw through the second plate and into the maxilla at the third position; inserting the fourth screw through the second plate and into the maxilla at the fourth position; and attaching the first wire to the first and second plates.
13. The surgical method of claim 10, further comprising the steps of bending the first plate to the contour of the mandible and bending the second plate to the contour of the maxilla.
14. The surgical method of claim 10, further comprising the step of attaching a second wire to the first and second plates and crossing the first and second wires.
15. A method comprising the steps of: bending a first plate to the contour of a mandible; inserting a first screw through the first plate and into the mandible; inserting a second screw through the first plate and into the mandible; bending a second plate to the contour of a maxilla; inserting a third screw through the second plate and into the maxilla; inserting a fourth screw through the second plate and into the maxilla; and attaching a first wire to a first hook of the first plate and a second hook of the second plate, the wire preventing movement of the mandible away from the maxilla.
16. The method of claim 15, further comprising the step of attaching a second wire to a third hook of the first plate and a fourth hook of the second plate.
17. The method of claim 16, wherein the first and third hooks are monolithically formed with the first plate and the second and fourth hooks are monolithically formed with the second plate.
18. The method of claim 16, wherein the first and second wires cross each other.
19. The method of claim 15, wherein the first screw is inserted through a first hole in the first plate, the second screw is inserted through a second hole in the first plate, the third screw is inserted through a third hole in the second plate, and the fourth screw is inserted through a fourth hole in the second plate.
20. The method of claim 15, further comprising the steps of bending at least one of a first stem connecting the first hole to the first plate, a second stem connecting the second hole to the first plate, a third stem connecting the third hole to the second plate and a fourth stem connecting the fourth hole to the second plate.
21. The method of claim 20, further comprising the step of bending each of the first, second, third and fourth stems.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0028]
[0029]
[0030]
[0031]
[0032]
[0033]
[0034]
[0035]
[0036]
[0037]
[0038]
DETAILED DESCRIPTION
[0039] Arch bars are described for providing stabilization and/or fixation between the mandible and maxilla using device(s) affixed to bone (native or graft) or prosthedontic appliances for use in applications including, but not limited to, treatment of fracture, restoration and fixation of dental occlusion, and maxillary and/or mandibular reconstruction with or without bone grafts. The arch bars may be affixed to bone, thus precluding the need for CW, or the use of adhesives.
[0040] As shown in
[0041] As used herein, the term “bendable” is to mean that the item to which the term refers may be moved, or shaped, in response to the application of an external force. Further, once moved or bent, the item does not return to its previous position, without being acted upon by a second external force. In other words, the item is bent and stays bent, until bent into another shape or position.
[0042] As used herein, the term “rigid” is used to refer to an item that resists bending to a moderate force, but may be bent under extreme force as compared to a bendable item.
[0043] The bar may be made from a variety of materials known to those of skill in the art. For example the bar may be made from stainless steel, titanium, or other metals; acrylics; and/or polymers.
[0044] In some embodiments, the bar 110 has one or more additional attachment loops 122, 123 located between the first 120 and second 121 attachment loops. For example, the bar 110 may have a third attachment loop 122 located approximately midway between the first 120 and second 121 attachment loops, thereby providing an additional point of attachment for the bar.
[0045] The attachment loops 120, 121, 122, 123 provide a point at which the bar 110 may be secured to a maxilla, a mandible, or a prosthetic appliance using a screw, a bone screw, or other fastener known to those of skill in the art. In some embodiment, the one or more additional attachment loops refers to a third, a fourth, a fifth, a sixth, a seventh, or more attachment loops that are even spaced along a length of the bar 110, or at other predetermined positions.
[0046] The attachment loops 120, 121, 122, 123 may be integrally formed with the bar 110 as if a single piece of material were used and each portion cut or formed from the single piece. In other embodiments, the attachment loops 120, 121, 122, 123 are made from a separate piece of material and attached to the bar 110 via welding, adhesive, rivets, screws, or via other attachments known to those of skill in the art. The material from which the attachment loops 120, 121, 122, 123 may be made may be the same as the bar 110, or of a different material.
[0047] A variety of fasteners may be used to attach the bar 110 to a maxilla or a mandible. For example, such fasteners may include screws, rivets, bolts, staples, or other fastener known to those of skill in the art. The fasteners are attached to the maxilla or mandible via a variety of systems. For example, a hole for attaching the fastener may be pre-drilled in the maxilla or mandible, or the fastener may be a self-drilling or self-tapping fastener. The size of the fastener may also be varied depending upon the placement desired. For example, mandibles are typically thicker than maxillas and therefore a mandible is capable of receiving a longer and/or wider fastener than the maxilla. Fasteners may also be flush mounted to the gingiva or may have a relief from the gingival surface so that there is some amount of externalization for a surgeon or dental professional to easily find the fastener when removal of the device is desired.
[0048] As a non-limiting example of such fasteners, screws 200 may used to attach the bar 110 to a maxilla or mandible. For example,
[0049] In some embodiments, the base of the head of the screw is of a larger diameter than a shaft of the screw to permit solid coaptation (via surface area contact) of the arch bar flange to the bone, much like a washer. Wire or elastics may then be placed between the arch bar opposing hooks 130, 330, or tabs, therefore a passage hole through the screw is not required, as was common with IMF screw fixation. The screw may project through the gingiva or mucosa for ease in removal, or it may be designed to sit flush with the bone. The screw design may be standard (tapping), self-tapping, self-drilling/tapping, or other desired style.
[0050] Insertion of screws 200 into a root should be avoided. In fact, it is desired that the screws 200 are inserted into the bone at a position between the roots of adjacent teeth. Therefore, the attachment loops 120, 121, 122, 123 may be appended from the arch bar 100 via a stem 140, 145 that is bendable. A bendable stem provides for the individual adjustment of each attachment loop to a position that allows for insertion of a screw into bone and between the roots of adjacent teeth, or for other adjustment of the position as desired by the surgeon or other medical professional.
[0051] Attachment loop positions may further be adjusted by providing compound attachment loops 350 in which at least two loops 360, 361 are provided per compound loop 350 as shown in
[0052] As noted above, a plurality of hooks 130, 330 are attached to the bar 110, 310. As used herein, plurality may mean one, but typically means more than one, such as two, three, four, five, six, seven, eight, nine, ten, eleven, twelve, thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen, or twenty. The hooks 130, 330 are used to attach a wire, an elastic such as a rubber band, or other device known to those of skill in the art, to the bar 110, 310 to immobilize, stabilize, or fixate the maxilla to the mandible, thus allowing for healing of the respective bones. A detailed side view of the hooks is shown in
[0053] As depicted in
[0054] In some aspects, the medical apparatus has two arch bars, as shown in
[0055] In another aspect, methods are provided for stabilizing a mandibular arch or a maxillary arch using the medical apparatuses described above. For example, the arch bar may be bent to approximate the mandibular arch or the maxillary arch of a patient in need of stabilization or fixation of the mandibular and/or maxillary arch. Screws are then inserted through the attachment loops, and the screws are then secured in the mandible and/or maxilla. If the attachment loop is not in line with a position that is between the roots of adjacent teeth, the attachment loop may be bent to such a position, or if a compound attachment loop is used, the appropriate loop is selected for use in attaching the arch bar to the maxilla or mandible.
[0056] In other embodiments, where both a mandibular and a maxillary arch bar are used, the methods also include securing a wire, an elastic, or other flexible or semi-rigid material between the hooks of the mandibular arch bar and the hooks of the maxillary arch bar. This may be done to establish intermaxillary fixation or dental occlusion. Such an arrangement is shown in
[0057] In another aspect, dynamic arch bars are described for providing stabilization and/or fixation between the mandible and maxilla using device(s) affixed to bone (native or graft) or prosthedontic appliances for use in applications including, but not limited to, treatment of fracture, restoration and fixation of dental occlusion, and maxillary and/or mandibular reconstruction with or without bone grafts. The arch bars may be affixed to bone, thus precluding the need for CW, or the use of adhesives. In addition, dynamic arch bars which include movable components, in particular movable attachment loop assemblies, provide additional features for surgeons or other professionals to adapt the arch bars to be used in a broader spectrum of applications.
[0058] As shown in
[0059] Arch bars such the dynamic arch bar, like those embodied above, may be bendable such that the arch bars may approximate a maxillary or mandibular arch. For example,
[0060] The bar, attachment loop assemblies, hooks, and screws may be made from a variety of materials known to those of skill in the art. For example the bar may be made from stainless steel, titanium, or other metals; acrylics; and/or polymers.
[0061] As shown in
[0062] Optionally, the bar 810 may include a roughened surface 840 to be engaged by the set screw 850, thereby providing traction for the set screw 850 and preventing unintended movement of the attachment loop assembly. The roughened surface 840 also may engage the set screw 850 in such a manner as to prevent or reduce turn-out of the set screw once it is set in place. Such contact may be further enhanced by roughening of the surface of a point of the set screw 850 that engages the roughened surface 140.
[0063] In
[0064] As illustrated by the arch bar 800 of
[0065] In some embodiments, and as noted above, the bar 810 has one or more additional attachment loop assemblies 822 located between the first 820 and second 821 attachment loop assemblies. For example, the bar 810 may have a third attachment loop assembly 822 located approximately midway between the first 820 and second 821 attachment loop assemblies, thereby providing an additional point of attachment for the bar. Additional attachment loop assemblies may be added as the requirements of the application dictate.
[0066] The attachment loops 820, 821, 822 provide a point, i.e. attachment loops 830, at which the bar 810 may be secured to a maxilla, a mandible, or a prosthetic appliance using a screw, a bone screw, or other fastener known to those of skill in the art.
[0067] A variety of fasteners may be used to attach the bar 810 to a maxilla or a mandible. For example, such fasteners may include screws, rivets, bolts, staples, or other fastener known to those of skill in the art. The fasteners are attached to the maxilla or mandible via a variety of systems. For example, a hole for attaching the fastener may be pre-drilled in the maxilla or mandible, or the fastener may be a self-drilling or self-tapping fastener. The size of the fastener may also be varied depending upon the placement desired. For example, mandibles are typically thicker than maxillas and therefore a mandible is capable of receiving a longer and/or wider fastener than the maxilla. Fasteners may also be flush mounted to the gingiva or may have a relief from the gingival surface so that there is some amount of externalization for a surgeon or dental professional to easily find the fastener when removal of the device is desired.
[0068] As a non-limiting example of such fasteners, screws 500 may used to attach the bar 110 to a maxilla or mandible. For example,
[0069] In some embodiments, the base of the head of the screw is of a larger diameter than a shaft of the screw to permit solid coaptation (via surface area contact) of the arch bar flange to the bone, much like a washer. Wire or elastics may then be placed between the hooks of opposing arch bars, precluding the need for a passage hole through the screw, as was common with IMF screw fixation. The screw may project through the gingiva or mucosa for ease in removal, or it may be designed to sit flush with the bone.
[0070] To secure the arch bar to the maxilla, the mandible, or the prosthedontic device, insertion of screws into a root should be avoided. In fact, it is desired that the screws are inserted into the bone at a position between the roots of adjacent teeth. Thus, in one aspect of the dynamic arch bar, the attachment loop assemblies are individually positioned between the roots of adjacent teeth to allow for optimal positioning and screw attachment.
[0071] As noted above, a plurality of hooks 830 are attached, or formed, to the bar 810. As used herein, plurality may mean one, but typically means more than one, such as two, three, four, five, six, seven, eight, nine, ten, eleven, twelve, thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen, or twenty. The hooks 830 on the arch bars are used to attach a wire, an elastic such as a rubber band, or other device known to those of skill in the art, to the bar 810 to immobilize, stabilize, or fixate the maxilla to the mandible, thus allowing for healing of the respective bones.
[0072] The hooks 830 may be positioned on the arch bar 800 such that the opening is to the attachment loop of the attachment loop assembly. However, in other embodiments, the hook may have the open part of the hook opposed to the attachment loop assembly. The size, shape, and configuration of the hooks may vary according to design preferences. The only limiting feature of the size, shape, and configuration of the hooks 830 is that they must have the ability to satisfactorily allow placement of wire, elastic, or other fasteners to the arch bar 800.
[0073] In some aspects, a medical apparatus has two arch bars, as shown in
[0074] In another aspect, methods are provided for stabilizing a mandibular arch or a maxillary arch using the medical apparatuses described above. For example, the arch bar may be bent to approximate the mandibular arch or the maxillary arch of a patient in need of stabilization or fixation of the mandibular and/or maxillary arch. Screws are then inserted through the attachment loops, and the screws are then secured into the mandible, maxilla, or a prosthedontic device. In the case where the screws are inserted in the mandible or maxilla, if the attachment loop is not in line with a position that is between the roots of adjacent teeth, the attachment loop assembly may be re-positioned to a desired position and secured in place using the set screws in the assembly.
[0075] As described above, the dynamic arch may be used in a method for reducing a fracture of the mandible or maxilla. In the method, an arch bar is set in place along the gingiva of a mandible or maxilla. Screws are inserted, through the attachment loop of an attachment loop assembly into the bone on either side of a fracture. Then, wire or an elastic device may be attached to the posts of the screws to apply tension between the two screws to reduce the fracture. Because the attachment loop assemblies have not been set to the bar with the set screws, the assemblies are free to move along the arch bar as the reduction is made. Once the fracture is reduced the set screws are put in place, and the arch bar is set to maintain the positioning of the reduced fracture. Once set in place, the attachment loop assembly and arch bar keep the fracture reduced for healing. The surgeon, dentist or other medical professional then may decide when the wire or elastic member is removed, either immediately after reduction, or at some time later in the healing process.
[0076] In other embodiments, where both a mandibular and a maxillary arch bar are used, the methods also include securing a wire, an elastic, or other flexible or semi-rigid material between the hooks of the mandibular arch bar and the hooks of the maxillary arch bar. This may be done to establish intermaxillary fixation or dental occlusion. Such methods are known as wiring the jaws shut or intermaxillary fixation.
[0077] The above described apparatuses and methods are used to restore, fixate, or create anew dental occlusion between existing native dentition, dental implants, or other dental appliances, or for the treatment of fracture and/or reconstructing maxillary and/or mandibular reconstruction.
[0078] The embodiments illustratively described herein may suitably be practiced in the absence of any element or elements, limitation or limitations, not specifically disclosed herein. Thus, for example, the terms “comprising,” “including,” “containing,” etc. shall be read expansively and without limitation. Additionally, the terms and expressions employed herein have been used as terms of description and not of limitation, and there is no intention in the use of such terms and expressions of excluding any equivalents of the features shown and described or portions thereof, but it is recognized that various modifications are possible within the scope of the invention claimed. Additionally the phrase “consisting essentially of” will be understood to include those elements specifically recited and those additional elements that do not materially affect the basic and novel characteristics of the claimed invention. The phrase “consisting of” excludes any element not specifically specified.
[0079] One skilled in the art will readily realize that all ranges discussed can and do necessarily also describe all subranges therein for all purposes and that all such subranges also form part and parcel of this invention. Any listed range can be easily recognized as sufficiently describing and enabling the same range being broken down into at least equal halves, thirds, quarters, fifths, tenths, etc. As a non-limiting example, each range discussed herein can be readily broken down into a lower third, middle third and upper third, etc.
[0080] All publications, patent applications, issued patents, and other documents referred to in this specification are herein incorporated by reference as if each individual publication, patent application, issued patent, or other document was specifically and individually indicated to be incorporated by reference in its entirety. Definitions that are contained in text incorporated by reference are excluded to the extent that they contradict definitions in this disclosure.
[0081] The present invention, thus generally described, it should be understood that changes and modifications can be made therein in accordance with ordinary skill in the art without departing from the invention in its broader aspects as defined in the following claims.