Abstract
The present invention discloses a prosthetic device for reconstruction of sternum, ribs, and clavicles, comprising a manubrium plate attached to a sternum plate by means of a joining plate. The manubrium plate has spherical ends coupled to the clavicle plate by screwing into a cup lock. The manubrium plate has extensions with holes, on which rib plates are seated. Similarly, the sternum plate has extensions with holes, on which rib plates are seated.
Claims
1. A prosthetic device for reconstruction of sternum, ribs, and clavicles, comprising a manubrium plate attached to a sternum plate by a joining plate; wherein the manubrium plate has spherical ends coupled to a clavicle plate by a cup lock; the cup lock is coupled to the clavicle plate by a thread; the manubrium plate has extensions with holes, to which rib plates are coupled; and the sternum plate has extensions with holes, to which the rib plates are coupled.
2. The prosthetic device of claim 1, wherein the manubrium plate and the sternum plate have a recess area where the joining plate fits.
3. A prosthetic device for reconstruction of sternum, ribs, and clavicles, comprising a manubrium plate having spherical ends that couple to a clavicle plate by a cup lock; that couples to the clavicle plate by a thread; wherein the manubrium plate has extensions with holes that couple with rib plates.
4. The prosthetic device of claim 1, a threaded end of the clavicle plate fits into a thread of the cup lock.
5. The prosthetic device of claim 1, wherein the clavicle plate has compound holes, with a circular hole adjacent to a double center hole.
6. The prosthetic device of claim 1, wherein the clavicle plate has an internal spherical surface that fits the spherical ends.
7. The prosthetic device of claim 1, wherein the rib plates have an extended geometry of length LPCL, with threaded holes arranged in a joining area, followed by a smooth area without holes, with L.sub.PCL lengths and an end with a through hole.
8. The prosthetic device of claim 1, wherein the clavicle plate has an extended geometry, with compound holes and an angled end having a threaded end.
9. The prosthetic device of claim 1, manufactured from a titanium alloy.
10. The prosthetic device of claim 3, wherein a threaded end of the clavicle plate fits into a thread of the cup lock.
11. The prosthetic device of claim 3, wherein the clavicle plate has compound holes, with a circular hole adjacent to a double center hole.
12. The prosthetic device of claim 3, wherein the clavicle plate has an internal spherical surface that fits the spherical ends.
13. The prosthetic device of claim 3, wherein the rib plates have an extended geometry of length LPCL, with threaded holes arranged in a joining area, followed by a smooth area without holes, with L.sub.PCL lengths and an end with a through hole.
14. The prosthetic device of claim 3, wherein the clavicle plate has an extended geometry with compound holes and an angled end having a threaded end.
15. The prosthetic device of claim 3, manufactured from a titanium alloy.
Description
DETAILED DESCRIPTION OF THE INVENTION
[0055] This invention discloses a new prosthetic device for reconstruction of sternum, ribs, and clavicles, modular and made of biocompatible material.
[0056] This prosthetic device for reconstruction of the sternum, ribs, and clavicles is responsible for replacing all or part of the sternum, ribs, and clavicles of an adult patient who will undergo a osteotomy procedure due to multiple factors, among which stand out, as the main cause, the resection of benign and malignant tumors and reconstructions for physical trauma and pathologies such as osteomyelitis, that compromise any of the bone structures mentioned.
[0057] FIG. 1 shows the new prosthetic device for reconstruction of sternum, ribs, and clavicles superimposed on a skeleton.
[0058] FIG. 2 shows the new prosthetic device for reconstruction of sternum, ribs, and clavicles, which has a manubrium plate attached to a sternum plate by means of a joining plate. The manubrium plate has spherical ends that are attached to the clavicle plate by a cup lock. The manubrium plate is coupled to the clavicle plate by means of screwing into the lock cup. The manubrium plate has holes over which rib plates are seated. Likewise, the sternum plate has holes over which rib plates are seated. The six different parts have their symmetrical pairs on right and left sides to allow the plates to be positioned according to the need of the surgical procedure.
[0059] FIG. 3 shows the set formed by the manubrium plate attached to a sternum plate by means of a joining plate.
[0060] FIGS. 4A, 4B and 4C show the manubrium plate, that emulates the manubrium, and the sternoclavicular joint. This set allows the replacement of the sternum manubrium and the sternoclavicular joint through a cup lock, joining each spherical end with the clavicular plate. The manubrium plate has two spherical ends on each side with a diameter between 6 to 8 mm, preferably 7 mm, coupled to the cup lock. Each spherical end is connected to the body of the manubrium by means of extended arms. The distance between the spheres is between 40 to 50 mm, preferably 44 to 46 mm. The manubrium plate has a recess area where the joining plate fits. Additionally, it has two extensions, each one having a hole, where the rib plates fit in. The angle is in the range of 10 to 18, preferably between 13 to 15. The angle is in the range of 95 to 115, preferably between 100 to 110. The length of the manubrium plate is between 40 to 50 mm, preferably between 43 to 47 mm. The distance between the center points of the holes of the manubrium plate is between 28 to 34 mm, preferably between 30 to 32 mm. In the recess area there are threaded holes for the fixation of the manubrium plate and the joining plate.
[0061] FIG. 5 shows the sternum plate that imitates the body of the sternum from the manubrium-sternal joint (sternal angle) to the xiphoid appendix. This sternum plate is attached to the manubrium plate by a machined cavity, suitable to house the joining plate. The sternum plate has bilateral extensions of the sternum plate. The extensions have holes in the distal end. The number of extensions is between 3 and 5, preferably 4, on each side of the sternum plate. The extensions are separated by a distance D.sub.EE between 18 to 25 mm, preferably between 20 to 23 mm, and by a distance D.sub.EB between 13 to 18 mm, preferably between 14 to 17 mm. The distance D.sub.B is between 28 to 36 mm, preferably between 30 to 34 mm. The width distance A.sub.PE is between 27 to 35 mm, preferably between 30 to 32 mm. The total length distance L.sub.PE is between 87 to 95 mm, preferably between 89 to 93 mm, and the length D.sub.B is between 29 to 35 mm, preferably between 31 to 33 mm. The sternum plate has a recess area where the joining plate fits. In the recess area there are threaded holes to couple the joining plate. The manubrium plate and the sternum plate have a recess area where the joining plate is adjusted.
[0062] FIGS. 6A, 6B, 6C, and 6D show the clavicle plate, designed for adults and made of biocompatible material, with an extended geometry and with preset angulation to emulate the shape of the clavicle, with compound holes for adjustment with clavicle fixation screws, and angled and threaded end to couple to the lock cup. Compound holes have a circular hole adjacent to a double center hole (522), where the distance between centers D.sub.EC is in the range of 2 to 3 mm, preferably 2.6 mm, and the distance between centers D.sub.DC is in the range of 0.5 to 1.0 mm, preferably 0.78 mm. The diameter D.sub.IA of the base circles of the double center hole is in the range of 2 to 3 mm, preferably 2.4 mm. Symmetrical clavicle plates for left and right sides have a length L.sub.CL in the range of 70 to 80 mm, preferably 75 mm, and the clavicle plates have between 4 to 6 compound holes distributed along the length of the clavicle plate preferably 5 compound holes. Compound holes are separated by a distance between holes A.sub.ED between 10 to 18 mm, preferably 14 mm. The clavicle plate has an angled and threaded end with a screw in the range between M6 and M10, preferably M8. The clavicle plate has a thickness that is between 1.5 to 2.5 mm, preferably 2.0 mm, and is made of titanium material. The clavicle plate has a width A.sub.C between 6 to 8 mm, preferably 7 mm. The angled end has a spherical surface with a curvature radius between 5 to 6 mm, preferably 5.5 mm, and a spherical surface with a curvature radius between 3 to 4 mm, preferably 3.5 mm, with a mirror finish. The angled end has a misalignment distance D.sub.D between 4 to 7 mm, preferably 5.5 mm. The threaded end of the clavicle plate fits in the thread (410) of the cup lock. The clavicle plate has an internal spherical surface that fits in the spherical end.
[0063] FIGS. 7A, 7B, 7C, and 7D show the cup lock with spherical geometry, hollow, low-cut, and with threaded surface to couple with the clavicle plate and the spherical end of the manubrium, thus forming the replacement of the sternoclavicular joint. The cup lock plate, symmetrical for the left and right sides, has a spherical external radius of 5.5 mm, approximately. The threaded hole has a thread from M6 to M10, preferably M8, with a thread depth P.sub.R between 2 to 4 mm, preferably 3 mm, and a radius R.sub.E between 3 to 4 mm. The cup lock plate has a diameter D.sub.BC between 4 to 6 mm, preferably 5 mm, a width A.sub.BC between 6 to 8 mm, preferably 6.8 mm, and a split edge A.sub.H between 1 to 2 mm, with a preferred angle of 45.
[0064] FIG. 8 shows the joining plate. The multifunctional features of the joining plate allow either the replacement of the manubrium or the body of the sternum, or a total replacement, depending on the type of resection needed. The joining plate fits into the machined cavity where the manubrium plates and sternum plate are joined. The joining plate preferably has fourteen holes of 2.5 mm diameter each, and has marks in low or high relief. The joining plate can have another geometry, different from that shown in FIG. 8. It can have more or fewer holes, but it has to comply properly with the bonding function between the manubrium plate and the sternum plate. The joining plate has a thickness between 1.5 to 2.5 mm, preferably 2.0 mm, and is made of biocompatible material, preferably titanium alloy.
[0065] FIGS. 9A, 9B and, 9C show an extended plate geometry of the rib plates, with three different lengths L.sub.PC, with threaded holes arranged in the joining area with the ribs, followed by a smooth area without holes, with lengths L.sub.PCL and one end with a through hole in the joining area with the manubrium plate and/or the sternum plate (not shown). The length L.sub.PC is between 70 to 140 mm, and the length L.sub.PCL is between 40 to 75 mm. The hole spacing L.sub.EA is between 6 to 8 mm, preferably 7 mm. The series of threaded holes have 1 mm chamfers at 45, preferably. The rib plate has a hole that couples with the sternum plate and the patient's remaining rib bone tissue. Rib plates preferably have three sizes: the first one is 133 mm long with 10 holes facing the remaining rib tissue, and a space to fold according to the geometry required by the patient's anatomy; the second one has the same specifications, but with a length of 105 mm; and the third one has six holes facing the remaining bone tissue and 77 mm in length. The threaded holes are preferably 2.5 mm in diameter, the rib plate is between 1 to 2 mm thick, preferably 1.6 mm, and is made of a biocompatible material, preferably titanium alloy.
[0066] The prosthetic device for reconstruction of the sternum, ribs, and clavicles can be manufactured in biocompatible and implantable material of long duration, free from internal defects, free from biochemical attacks, stable at body temperature, and of quasi-static mechanical load. Such materials are, for example, titanium; ceramics such as aluminum oxide, calcium aluminates, titanium oxides and some carbons; polymers such as teflon, nylon, silicone, polyethylene; metals and alloys; compounds such as nanocompounds, metal-carbon or metal-nitrogen ceramics, and complex intermetallic alloys.
[0067] The simplicity of the reconstruction depends on the amount of parts, and the polyfunctional joining piece indicates if it is a complete or partial reconstruction. This piece, once screwed, can join the plate of the body of sternum with the manubrium bone tissue left after resecting the sternum. If, on the contrary, the osteotomy is much larger, it can be anchored with the sternum piece.
[0068] This device is fastened with self-tapping and self-drilling screws with 2.5 mm diameter. Besides, it allows the plates to be manipulated with surgical instruments specific for pate bending, and to perform osteosynthesis surgical procedures.
[0069] The previous description can only be taken as a reference, and not in a limited way, to its components and the explicit relationship between them. That description has been made to provide a clear idea about the general configuration of the subject matter of the claimed invention.
DESCRIPTION OF THE DRAWINGS
[0070] To complement the description of the invention and in order to help gain a better understanding of the technical characteristics of it, the following set of figures, which constitutes an integral part of the invention, is included.
[0071] FIG. 1. Isometric view of the prosthesis device for reconstruction of sternum, ribs, and clavicles superimposed on a skeleton.
[0072] FIG. 2. Isometric view of the prosthesis device for reconstruction of sternum, ribs, and clavicles.
[0073] FIG. 3. Isometric view of a subset consisting of the manubrium plate, the sternum plate, and the joining plate.
[0074] FIG. 4A. Blueprint of the manubrium plate.
[0075] FIG. 4B. Detail of the blueprint of the manubrium plate.
[0076] FIG. 4C. Isometric view of the manubrium plate.
[0077] FIG. 5. Blueprint of the sternum plate.
[0078] FIGS. 6 (A, B, C, and D). Multiple details of the blueprint of the clavicle plate.
[0079] FIGS. 7 (A, B, C, and D). Multiple details of the blueprint of the cup lock.
[0080] FIG. 8. Blueprint of the joining plate.
[0081] FIGS. 9 (A, B, and C). Blueprint of the rib plate (various lengths).
REFERENCE LIST
[0082] 10 Prosthetic device for reconstruction of sternum, ribs, and clavicles [0083] 100 Manubrium plate [0084] 200 Sternum plate [0085] 300 Joining plate [0086] 400 Cup lock [0087] 500 Clavicle plate [0088] 600 Rib plate
