CN214805722U - Partition bone trabecula knee joint femoral condyle prosthesis - Google Patents
Partition bone trabecula knee joint femoral condyle prosthesis Download PDFInfo
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- CN214805722U CN214805722U CN202022465673.8U CN202022465673U CN214805722U CN 214805722 U CN214805722 U CN 214805722U CN 202022465673 U CN202022465673 U CN 202022465673U CN 214805722 U CN214805722 U CN 214805722U
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Abstract
The utility model discloses a partition bone trabecula knee joint femoral condyle prosthesis, which comprises a left inner condyle and a right outer condyle, wherein the front end of the inner condyle and the front end of the outer condyle are integrated into a whole, and the rear end part of the inner condyle is connected with the rear end part of the outer condyle through a limit stop; the method is characterized in that: the first fixing surface, the fifth fixing surface, the sixth fixing surface and the tenth fixing surface are provided with first bone trabeculae; the second fixing surface, the fourth fixing surface, the seventh fixing surface and the ninth fixing surface are provided with second bone trabeculae; the third fixing surface and the eighth fixing surface are provided with a third trabecula; the aperture and porosity of the first bone trabecula are smaller than those of the second bone trabecula and the third bone trabecula in sequence. The utility model relates to a subregion bone trabecula knee joint thighbone condyle prosthesis realizes the micro strain in thighbone condyle bone tissue most region and does benefit to the bone and grow into between minimum effective strain threshold value and the super physiological strain threshold value, promotes long-term stability.
Description
Technical Field
The utility model relates to an artificial knee joint femoral condyle, in particular to a partition bone trabecula knee joint femoral condyle prosthesis.
Background
Total knee replacement is currently an effective treatment mode for end-stage knee joint diseases in clinic, and the damaged knee joint tissue is replaced by an artificially designed joint prosthesis, so that pain of patients is relieved, the knee joint function of the patients is recovered, and the life quality of the patients is improved. Corresponding to the anatomical structure of human body, the knee joint prosthesis comprises a femoral condyle, a tibial plateau and a platform pad. With the rapid development of medical instrument technology and the continuous improvement of requirements of people on the safety and effectiveness of prosthesis products, the design of the knee joint prosthesis needs to be continuously optimized and improved.
Currently, clinically used knee prostheses include two major classes, bone cement type and biologic type (non-bone cement fixation). Wherein the bone cement type prosthesis mechanically fixes the joint prosthesis and the bone tissue by means of the solidification and filling of the bone cement. However, years of clinical application show that bone cement fixation can bring about a plurality of safety and effectiveness problems: the bone cement monomer is polymerized to release heat, so that surrounding tissues are damaged; bone cement particles, if introduced into the blood or during filling, cause high pressure in the medullary cavity, leading to pulmonary embolism and fat embolism.
The biological knee joint prosthesis can effectively eliminate the safety and effectiveness risks brought by bone cement, and generally utilizes a surface porous structure to promote bone ingrowth so as to obtain long-term stability. But the surface porous structure is usually prepared by surface treatment processes such as sand blasting, coating, sintering and the like, has low bonding strength with an entity, is easy to fall off, and reduces the service life of the prosthesis. And, according to Wolff's law: after the stress causes the bone to generate deformation (also called micro-strain), the original signal can be started to regulate the synthesis and the catabolism of the bone, and the strain range can promote the bone growth only between the minimum effective strain threshold and the supraphysiological strain threshold. Therefore, the knee joint femoral condyle prosthesis is designed, the micro strain of most areas of bone tissues is realized between the minimum effective strain threshold and the super physiological strain threshold, the bone ingrowth is facilitated, and the knee joint femoral condyle prosthesis has important significance.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the prior art not enough, provide a subregion bone trabecula knee joint thighbone condyle prosthesis.
The technical scheme of the utility model outlines as follows:
a femoral condyle prosthesis of a segmented trabecular bone knee joint comprises a medial condyle 11 and a lateral condyle 12 which are arranged on the left and right sides, wherein a medial condyle front end 1101 of the medial condyle 11 and a lateral condyle front end 1102 of the lateral condyle (12) are integrated, and a rear end of the medial condyle 11 is connected with a rear end of the lateral condyle 12 through a limit stop 15; the lateral wall of the medial condyle 11 and the lateral wall of the lateral condyle 12 are both provided with holding grooves 16, the medial condyle 11 is provided with a medial condyle fixing surface 110, and the lateral condyle is provided with a lateral condyle fixing surface 120; the medial condyle fixing surface 110 comprises a first fixing surface 111, a second fixing surface 112, a third fixing surface 113, a fourth fixing surface 114 and a fifth fixing surface 115 which are connected in sequence, and the lateral condyle fixing surface 120 comprises a sixth fixing surface 121, a seventh fixing surface 122, an eighth fixing surface 123, a ninth fixing surface 124 and a tenth fixing surface 125 which are connected in sequence; the middle parts of the third fixing surface 113 and the eighth fixing surface 123 are provided with mounting holes 17, and the first fixing surface 111 and the second fixing surface 112 intersect to form a first intersection line 181; the second fixing surface 112 and the third fixing surface 113 intersect to form a second intersection line 182; the third fixing surface 113 and the fourth fixing surface 114 intersect to form a third intersection line 183; the fourth fixing surface 114 and the fifth fixing surface 115 form a fourth intersection line 184; the intersection line of the sixth fixing surface 121 and the seventh fixing surface 122 is collinear with the first intersection line 181; the intersection line of the seventh fixing surface 122 and the eighth fixing surface 123 is collinear with the second intersection line 182; the intersection line of the eighth fixing surface 123 and the ninth fixing surface 124 is collinear with the third intersection line 183; the line of intersection of the ninth fixation surface 124 and the tenth fixation surface 125 is collinear with the fourth line of intersection 184; the first intersection line 181, the second intersection line 182, the third intersection line 183 and the fourth intersection line 184 are parallel to each other;
the included angle between the first fixing surface 111 and the second fixing surface 112 is equal to the included angle between the sixth fixing surface 121 and the seventh fixing surface 122, and is 130-140 degrees; the included angle between the second fixing surface 112 and the third fixing surface 113 is equal to the included angle between the seventh fixing surface 122 and the eighth fixing surface 123, and is 130-140 degrees; the included angle between the third fixing surface 113 and the fourth fixing surface 114 is equal to the included angle between the eighth fixing surface 123 and the ninth fixing surface 124, and is 130-140 degrees; the included angle between the fourth fixing surface 114 and the fifth fixing surface 115 is equal to the included angle between the ninth fixing surface 124 and the tenth fixing surface 125, and is 130-140 degrees;
the first fixing surface 111, the fifth fixing surface 115, the sixth fixing surface 121 and the tenth fixing surface 125 are provided with a first bone trabecula 191;
the second fixing surface 112, the fourth fixing surface 114, the seventh fixing surface 122 and the ninth fixing surface 124 are provided with second bone trabeculae 192;
the third fixing surface 113 and the eighth fixing surface 123 are provided with a third trabecula 193;
the first trabecular bone 191 has a smaller pore size and porosity than the second 192 and third 193 trabecular bone in turn.
Preferably, the first bone trabecula 191 has a pore diameter of 0.74mm to 0.85mm, a porosity of 70.0% to 74.7%, and a through porosity of 100%;
the aperture of the second bone trabecula 192 is 0.86mm-0.99mm, the porosity is 74.8% -77.5%, and the through porosity is 100%;
the third trabecula 193 has the aperture of 1.00-1.10 mm, the porosity of 77.6-85% and the through-hole rate of 100%.
The first, second and third bone trabeculae 191, 192 and 193 are of equal thickness, 0.5mm-3 mm.
A rectangular first solid structure 21 is arranged at the joint of the second fixing surface and the seventh fixing surface; the joint of the first fixing surface and the sixth fixing surface is provided with a semicircular second solid structure 20, and the thickness of the first solid structure 21 and the thickness of the second solid structure 20 are equal to the thickness of the trabecula and are 0.5mm-3 mm.
The first solid structure 21 and the second solid structure 20 can limit the included angle between the fourth fixing surface and the fifth fixing surface and the included angle between the ninth fixing surface and the tenth fixing surface from becoming larger in the process.
Preferably, the side walls 22 are provided at the edges of the fixation surfaces formed by the medial condyle fixation surface 110, the lateral condyle fixation surface 120 and the positive stop 15.
The utility model discloses following beneficial effect has:
the utility model relates to a subregion bone trabecula knee joint thighbone condyle prosthesis realizes the micro strain in thighbone condyle bone tissue most region and does benefit to the bone and grow into between minimum effective strain threshold value and the super physiological strain threshold value, promotes long-term stability.
The utility model discloses a 3D prints integrated into one piece, and the bone trabecula is high with entity bonding strength, is difficult for droing, promotes the false body life-span.
Drawings
Fig. 1 is an isometric view of the present invention from the lateral condyle of a zoned trabecular knee femoral condyle prosthesis.
Fig. 2 is an isometric view of a zoned trabecular knee femoral condyle prosthesis (including a first solid structure, a second solid structure) of the present invention viewed from the medial condyle.
Fig. 3 is an isometric view of the present invention from the anterior of the femoral condyle of a zoned trabecular knee-joint femoral condyle prosthesis.
FIG. 4 is a strain cloud for finite element analysis of a zoned trabecular knee femoral condyle prosthesis of example 1 viewed from the anterior femoral condyle.
FIG. 5 is a strain cloud for finite element analysis of a zoned trabecular knee femoral condyle prosthesis of example 1 viewed from the posterior aspect of the femoral condyle.
FIG. 6 is a strain cloud for finite element analysis of a homogeneous trabecular artificial knee femoral condyle prosthesis of control group 1 from an anterior view.
FIG. 7 is a strain cloud for finite element analysis of the homogeneous trabecular artificial knee femoral condyle prosthesis of control group 1 as viewed from the posterior.
Detailed Description
The utility model relates to a subregion bone trabecula knee joint thighbone condyle prosthesis adopts 3D to print integrated into one piece. The material may be any one of titanium alloy, cobalt alloy or zirconium alloy.
The present invention will be further described with reference to the accompanying drawings and examples.
Example 1
A femoral condyle prosthesis (see figures 1, 2 and 3) of a segmental trabecular bone knee joint comprises a medial condyle 11 and a lateral condyle 12 which are arranged on the left and right, wherein a medial condyle front end 1101 of the medial condyle 11 and a lateral condyle front end 1102 of the lateral condyle (12) are integrated, and a rear end of the medial condyle 11 is connected with a rear end of the lateral condyle 12 through a limit stop 15; the lateral wall of the medial condyle 11 and the lateral wall of the lateral condyle 12 are both provided with holding grooves 16, the medial condyle 11 is provided with a medial condyle fixing surface 110, and the lateral condyle is provided with a lateral condyle fixing surface 120; the medial condyle fixing surface 110 comprises a first fixing surface 111, a second fixing surface 112, a third fixing surface 113, a fourth fixing surface 114 and a fifth fixing surface 115 which are connected in sequence, and the lateral condyle fixing surface 120 comprises a sixth fixing surface 121, a seventh fixing surface 122, an eighth fixing surface 123, a ninth fixing surface 124 and a tenth fixing surface 125 which are connected in sequence; the middle parts of the third fixing surface 113 and the eighth fixing surface 123 are provided with mounting holes 17, and the mounting holes (17) are movably connected with mounting columns; the first fixing surface 111 and the second fixing surface 112 intersect to form a first intersection line 181; the second fixing surface 112 and the third fixing surface 113 intersect to form a second intersection line 182; the third fixing surface 113 and the fourth fixing surface 114 intersect to form a third intersection line 183; the fourth fixing surface 114 and the fifth fixing surface 115 form a fourth intersection line 184; the intersection line of the sixth fixing surface 121 and the seventh fixing surface 122 is collinear with the first intersection line 181; the intersection line of the seventh fixing surface 122 and the eighth fixing surface 123 is collinear with the second intersection line 182; the intersection line of the eighth fixing surface 123 and the ninth fixing surface 124 is collinear with the third intersection line 183; the line of intersection of the ninth fixation surface 124 and the tenth fixation surface 125 is collinear with the fourth line of intersection 184; the first intersection line 181, the second intersection line 182, the third intersection line 183 and the fourth intersection line 184 are parallel to each other;
the included angle between the first fixing surface 111 and the second fixing surface 112 is equal to the included angle between the sixth fixing surface 121 and the seventh fixing surface 122, and is 135 degrees; the included angle between the second fixing surface 112 and the third fixing surface 113 is equal to the included angle between the seventh fixing surface 122 and the eighth fixing surface 123, and is 135 degrees; the included angle between the third fixing surface 113 and the fourth fixing surface 114 is equal to the included angle between the eighth fixing surface 123 and the ninth fixing surface 124, and is 135 degrees; the included angle between the fourth fixing surface 114 and the fifth fixing surface 115 is equal to the included angle between the ninth fixing surface 124 and the tenth fixing surface 125, and is 135 degrees;
the first fixing surface 111, the fifth fixing surface 115, the sixth fixing surface 121 and the tenth fixing surface 125 are provided with a first bone trabecula 191;
the second fixing surface 112, the fourth fixing surface 114, the seventh fixing surface 122 and the ninth fixing surface 124 are provided with second bone trabeculae 192;
the third fixing surface 113 and the eighth fixing surface 123 are provided with a third trabecula 193;
the first trabecular bone 191 has a smaller pore size and porosity than the second 192 and third 193 trabecular bone in turn.
The aperture of the first bone trabecula 191 is 0.80mm, the porosity is 72 percent, and the through porosity is 100 percent;
the aperture of the second bone trabecula 192 is 0.93mm, the porosity is 76%, and the through porosity is 100%;
the third trabecular bone 193 has a pore diameter of 1.05mm, a porosity of 80% and a through porosity of 100%.
The first, second and third bone trabeculae 191, 192 and 193 are of equal thickness, 1.5 mm.
Example 2
A femoral condyle prosthesis of a segmented trabecular bone knee joint comprises a medial condyle 11 and a lateral condyle 12 which are arranged on the left and right sides, wherein a medial condyle front end 1101 of the medial condyle 11 and a lateral condyle front end 1102 of the lateral condyle (12) are integrated, and a rear end of the medial condyle 11 is connected with a rear end of the lateral condyle 12 through a limit stop 15; the lateral wall of the medial condyle 11 and the lateral wall of the lateral condyle 12 are both provided with holding grooves 16, the medial condyle 11 is provided with a medial condyle fixing surface 110, and the lateral condyle is provided with a lateral condyle fixing surface 120; the medial condyle fixing surface 110 comprises a first fixing surface 111, a second fixing surface 112, a third fixing surface 113, a fourth fixing surface 114 and a fifth fixing surface 115 which are connected in sequence, and the lateral condyle fixing surface 120 comprises a sixth fixing surface 121, a seventh fixing surface 122, an eighth fixing surface 123, a ninth fixing surface 124 and a tenth fixing surface 125 which are connected in sequence; the middle parts of the third fixing surface 113 and the eighth fixing surface 123 are provided with mounting holes 17, and the mounting holes (17) are movably connected with mounting columns; the first fixing surface 111 and the second fixing surface 112 intersect to form a first intersection line 181; the second fixing surface 112 and the third fixing surface 113 intersect to form a second intersection line 182; the third fixing surface 113 and the fourth fixing surface 114 intersect to form a third intersection line 183; the fourth fixing surface 114 and the fifth fixing surface 115 form a fourth intersection line 184; the intersection line of the sixth fixing surface 121 and the seventh fixing surface 122 is collinear with the first intersection line 181; the intersection line of the seventh fixing surface 122 and the eighth fixing surface 123 is collinear with the second intersection line 182; the intersection line of the eighth fixing surface 123 and the ninth fixing surface 124 is collinear with the third intersection line 183; the line of intersection of the ninth fixation surface 124 and the tenth fixation surface 125 is collinear with the fourth line of intersection 184; the first intersection line 181, the second intersection line 182, the third intersection line 183 and the fourth intersection line 184 are parallel to each other;
the included angle between the first fixing surface 111 and the second fixing surface 112 is equal to the included angle between the sixth fixing surface 121 and the seventh fixing surface 122, and is 130 degrees; the included angle between the second fixing surface 112 and the third fixing surface 113 is equal to the included angle between the seventh fixing surface 122 and the eighth fixing surface 123, and is 130 degrees; the included angle between the third fixing surface 113 and the fourth fixing surface 114 is equal to the included angle between the eighth fixing surface 123 and the ninth fixing surface 124, and is 130 degrees; the included angle between the fourth fixing surface 114 and the fifth fixing surface 115 is equal to the included angle between the ninth fixing surface 124 and the tenth fixing surface 125, and is 130 degrees;
the first fixing surface 111, the fifth fixing surface 115, the sixth fixing surface 121 and the tenth fixing surface 125 are provided with a first bone trabecula 191;
the second fixing surface 112, the fourth fixing surface 114, the seventh fixing surface 122 and the ninth fixing surface 124 are provided with second bone trabeculae 192;
the third fixing surface 113 and the eighth fixing surface 123 are provided with a third trabecula 193;
the first trabecular bone 191 has a smaller pore size and porosity than the second 192 and third 193 trabecular bone in turn.
The first bone trabecula 191 has a pore diameter of 0.74mm, a porosity of 70.0% and a through porosity of 100%;
the aperture of the second bone trabecula 192 is 0.86mm, the porosity is 74.8%, and the through porosity is 100%;
the third trabecular bone 193 has a pore diameter of 1.00mm, a porosity of 77.6% and a through-hole porosity of 100%.
The first, second and third bone trabeculae 191, 192 and 193 are of equal thickness, 0.5 mm.
Example 3
A femoral condyle prosthesis of a segmented trabecular bone knee joint comprises a medial condyle 11 and a lateral condyle 12 which are arranged on the left and right sides, wherein a medial condyle front end 1101 of the medial condyle 11 and a lateral condyle front end 1102 of the lateral condyle (12) are integrated, and a rear end of the medial condyle 11 is connected with a rear end of the lateral condyle 12 through a limit stop 15; the lateral wall of the medial condyle 11 and the lateral wall of the lateral condyle 12 are both provided with holding grooves 16, the medial condyle 11 is provided with a medial condyle fixing surface 110, and the lateral condyle is provided with a lateral condyle fixing surface 120; the medial condyle fixing surface 110 comprises a first fixing surface 111, a second fixing surface 112, a third fixing surface 113, a fourth fixing surface 114 and a fifth fixing surface 115 which are connected in sequence, and the lateral condyle fixing surface 120 comprises a sixth fixing surface 121, a seventh fixing surface 122, an eighth fixing surface 123, a ninth fixing surface 124 and a tenth fixing surface 125 which are connected in sequence; the middle parts of the third fixing surface 113 and the eighth fixing surface 123 are provided with mounting holes 17, and the mounting holes (17) are movably connected with mounting columns; the first fixing surface 111 and the second fixing surface 112 intersect to form a first intersection line 181; the second fixing surface 112 and the third fixing surface 113 intersect to form a second intersection line 182; the third fixing surface 113 and the fourth fixing surface 114 intersect to form a third intersection line 183; the fourth fixing surface 114 and the fifth fixing surface 115 form a fourth intersection line 184; the intersection line of the sixth fixing surface 121 and the seventh fixing surface 122 is collinear with the first intersection line 181; the intersection line of the seventh fixing surface 122 and the eighth fixing surface 123 is collinear with the second intersection line 182; the intersection line of the eighth fixing surface 123 and the ninth fixing surface 124 is collinear with the third intersection line 183; the line of intersection of the ninth fixation surface 124 and the tenth fixation surface 125 is collinear with the fourth line of intersection 184; the first intersection line 181, the second intersection line 182, the third intersection line 183 and the fourth intersection line 184 are parallel to each other;
the included angle between the first fixing surface 111 and the second fixing surface 112 is equal to the included angle between the sixth fixing surface 121 and the seventh fixing surface 122, and is 140 degrees; the included angle between the second fixing surface 112 and the third fixing surface 113 is equal to the included angle between the seventh fixing surface 122 and the eighth fixing surface 123, and is 140 degrees; the included angle between the third fixing surface 113 and the fourth fixing surface 114 is equal to the included angle between the eighth fixing surface 123 and the ninth fixing surface 124, and is 140 degrees; the included angle between the fourth fixing surface 114 and the fifth fixing surface 115 is equal to the included angle between the ninth fixing surface 124 and the tenth fixing surface 125, and is 140 degrees;
the first fixing surface 111, the fifth fixing surface 115, the sixth fixing surface 121 and the tenth fixing surface 125 are provided with a first bone trabecula 191;
the second fixing surface 112, the fourth fixing surface 114, the seventh fixing surface 122 and the ninth fixing surface 124 are provided with second bone trabeculae 192;
the third fixing surface 113 and the eighth fixing surface 123 are provided with a third trabecula 193;
the first trabecular bone 191 has a smaller pore size and porosity than the second 192 and third 193 trabecular bone in turn.
The first bone trabecula 191 has a pore diameter of 0.85mm, a porosity of 74.7% and a through porosity of 100%;
the aperture of the second bone trabecula 192 is 0.99mm, the porosity is 77.5%, and the through porosity is 100%;
the third trabecular bone 193 has a pore diameter of 1.10mm, a porosity of 85% and a through porosity of 100%.
The first 191, second 192 and third 193 bone trabeculae are 3mm thick and equal.
The structure is the same as that of example 1, but the trabecular bone of the medial condyle fixing surface 110 and the lateral condyle fixing surface 120 has a pore diameter of 0.93mm, a porosity of 76% and a through-hole porosity of 100%.
And (3) experimental verification:
carry out finite element analysis to the finite element model of embodiment 1 of the utility model and comparison group 1, as shown in fig. 4-7, strain cloud picture only shows that the scope is 1000 + 3000 microstrain (shadow part), the utility model discloses an embodiment 1 is 1000 + 3000 microstrain region on thighbone condyle bone tissue finite element model and is 65.2% in the proportion of whole thighbone condyle bone tissue, is greater than comparison group 1(1000 + 3000 microstrain region is 42.3%) suggestion the utility model a subregion trabecular bone knee joint thighbone condyle prosthesis realizes that most part region microstrain is between minimum effective strain threshold value and supraphysiological strain threshold value, has excellent bone length and goes into the performance.
The finite element analysis results prove that the proportion of the 1000-3000 microstrain area on the finite element model of the femoral condyle bone tissue of the examples 2 and 3 on the whole femoral condyle bone tissue finite element model is similar to that of the example 1.
The structure can also be adopted as in embodiment 1, but a rectangular first solid structure 21 is arranged at the joint of the second fixing surface and the seventh fixing surface; the combination part of the first fixing surface and the sixth fixing surface is provided with a semicircular second solid structure 20, and the thickness of the first solid structure 21 and the second solid structure 20 is equal to the thickness of the trabecula, and is 1.5mm (or 0.5 or 3 mm). The first solid structure 21 and the second solid structure 20 can ensure that the included angle between the fourth fixing surface and the fifth fixing surface and the included angle between the ninth fixing surface and the tenth fixing surface are not changed in the processing process.
In addition to the structure of example 1, the side wall 22 may be provided at the edge of the fixing surface formed by the medial condyle fixing surface 110, the lateral condyle fixing surface 120 and the limit stop 15.
Claims (5)
1. A femoral condyle prosthesis of a segmented trabecular bone knee joint comprises a medial condyle (11) and a lateral condyle (12) which are arranged on the left and right sides, wherein the anterior end (1101) of the medial condyle (11) of the medial condyle is integrated with the anterior end (1102) of the lateral condyle (12), and the rear end of the medial condyle (11) is connected with the rear end of the lateral condyle (12) through a limit stop (15); the lateral wall of the medial condyle (11) and the lateral wall of the lateral condyle (12) are both provided with holding grooves (16), the medial condyle (11) is provided with a medial condyle fixing surface (110), and the lateral condyle is provided with a lateral condyle fixing surface (120); the medial condyle fixing surface (110) comprises a first fixing surface (111), a second fixing surface (112), a third fixing surface (113), a fourth fixing surface (114) and a fifth fixing surface (115) which are sequentially connected, and the lateral condyle fixing surface (120) comprises a sixth fixing surface (121), a seventh fixing surface (122), an eighth fixing surface (123), a ninth fixing surface (124) and a tenth fixing surface (125) which are sequentially connected; the middle parts of the third fixing surface (113) and the eighth fixing surface (123) are provided with mounting holes (17), and the first fixing surface (111) and the second fixing surface (112) are intersected to form a first intersection line (181); the second fixing surface (112) and the third fixing surface (113) are intersected to form a second intersection line (182); the third fixing surface (113) and the fourth fixing surface (114) are intersected to form a third intersection line (183); the fourth fixing surface (114) and the fifth fixing surface (115) form a fourth intersection line (184); the intersection line of the sixth fixing surface (121) and the seventh fixing surface (122) is collinear with the first intersection line (181); the intersection line of the seventh fixing surface (122) and the eighth fixing surface (123) is collinear with the second intersection line (182); the intersection line of the eighth fixing surface (123) and the ninth fixing surface (124) is collinear with the third intersection line (183); the intersection line of the ninth fixing surface (124) and the tenth fixing surface (125) is collinear with the fourth intersection line (184); the first intersection line (181), the second intersection line (182), the third intersection line (183) and the fourth intersection line (184) are parallel to each other;
the included angle between the first fixing surface (111) and the second fixing surface (112) is equal to the included angle between the sixth fixing surface (121) and the seventh fixing surface (122), and the included angle is 130-140 degrees; the included angle between the second fixing surface (112) and the third fixing surface (113) is equal to the included angle between the seventh fixing surface (122) and the eighth fixing surface (123) and is 130-140 degrees; the included angle between the third fixing surface (113) and the fourth fixing surface (114) is equal to the included angle between the eighth fixing surface (123) and the ninth fixing surface (124), and the included angle is 130-140 degrees; the included angle between the fourth fixing surface (114) and the fifth fixing surface (115) is equal to the included angle between the ninth fixing surface (124) and the tenth fixing surface (125), and the included angle is 130-140 degrees;
the method is characterized in that: the first fixing surface (111), the fifth fixing surface (115), the sixth fixing surface (121) and the tenth fixing surface (125) are provided with a first bone trabecula (191);
the second fixing surface (112), the fourth fixing surface (114), the seventh fixing surface (122) and the ninth fixing surface (124) are provided with second bone trabeculae (192);
the third fixing surface (113) and the eighth fixing surface (123) are provided with a third trabecula (193);
the first trabecular bone (191) has a smaller pore size and porosity than the second (192) and third (193) trabecular bone in that order.
2. The zoned trabecular bone knee femoral condyle prosthesis according to claim 1, wherein the first trabecular bone (191) has a pore size of 0.74mm to 0.85mm, a porosity of 70.0% to 74.7%, and a through porosity of 100%;
the aperture of the second bone trabecula (192) is 0.86mm-0.99mm, the porosity is 74.8% -77.5%, and the through porosity is 100%;
the third trabecula (193) has the aperture of 1.00-1.10 mm, the porosity of 77.6-85% and the through porosity of 100%.
3. The zoned trabecular bone knee femoral condyle prosthesis according to claim 1 or 2, wherein the first, second and third trabecular bone (191, 192, 193) are of equal thickness, between 0.5mm and 3 mm.
4. The zoned trabecular knee femoral condyle prosthesis according to claim 1, wherein a rectangular first solid structure (21) is provided at the junction of the second fixing surface and the seventh fixing surface; and a semicircular second solid structure (20) is arranged at the joint of the first fixing surface and the sixth fixing surface, and the thickness of the first solid structure (21) and the second solid structure (20) is equal to that of the trabecula and is 0.5-3 mm.
5. The prosthesis of claim 1, wherein the side wall (22) is provided at the edge of the fixation surface formed by the medial condyle fixation surface (110), the lateral condyle fixation surface (120) and the limit stop (15).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022465673.8U CN214805722U (en) | 2020-10-30 | 2020-10-30 | Partition bone trabecula knee joint femoral condyle prosthesis |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022465673.8U CN214805722U (en) | 2020-10-30 | 2020-10-30 | Partition bone trabecula knee joint femoral condyle prosthesis |
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| CN214805722U true CN214805722U (en) | 2021-11-23 |
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| CN202022465673.8U Active CN214805722U (en) | 2020-10-30 | 2020-10-30 | Partition bone trabecula knee joint femoral condyle prosthesis |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 27 Ziyang Road, Nankai District, Tianjin, 300100 Patentee after: Jiasite medical equipment (Tianjin) Co.,Ltd. Address before: No.27 Ziyang Road Nankai District Tianjin 300190 Patentee before: Jiasite Huajian Medical Equipment(Tianjin)Co.,Ltd. |
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| CP03 | Change of name, title or address |