CN201154007Y

CN201154007Y - Hip-joint prosthesis with hydroxylapatite coating

Info

Publication number: CN201154007Y
Application number: CNU2008200002952U
Authority: CN
Inventors: 徐宁; 徐英忱
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-01-22
Filing date: 2008-01-22
Publication date: 2008-11-26
Anticipated expiration: 2018-01-22

Abstract

The utility model discloses a hydroxyapatite-coated coxa prosthesis aiming at solving the problems that the joint strength between the prior coxa prosthesis and the bone is not great enough, and the fixing effect of the coxa prosthesis is influenced. The prosthesis includes a handle body, a handle neck is arranged at the upper end of the handle body, the outer surface of the handle body is provided with a hydroxyapatite coat, or the outer surface of the handle body is provided with a coat which is composed of a titanium coat and a hydroxyapatite coat arranged on the outside of the titanium coat. The prosthesis is applicable to coxa prosthesis of the human body.

Description

Hydroxyapatite Coat Hip Joint Prossis

Technical field

This utility model relates to a kind of hip prosthesis, relates in particular to a kind of Hydroxyapatite Coat Hip Joint Prossis.

Background technology

Hip prosthesis is the artificial joint that uses in the human body orthopedic, is used for replacing the hip joint of disabling, and makes it recover physiological function, removes ailing.

Prior biological fixed pattern hip prosthesis is generally made by titanium alloy, in order to make it after the pulp cavity of implant into body femur, the new bone that human femur under loading self grows can combine together preferably with hip prosthesis, pockmark is made with methods such as sandblasts in surface at prosthese, to increase the roughness of prosthetic surface, enlarge the area that new bone combines with prosthese, to strengthen the bond strength of bone and prosthese.Yet existing this prosthese makes the bond strength of its prosthese and bone surface not reach optimum state because its surface roughness is limited, affects the result of use of hip prosthesis.

The utility model content

The purpose of this utility model provides a kind of Hydroxyapatite Coat Hip Joint Prossis that can effectively increase prosthese and synosteosis intensity.

For achieving the above object, this utility model adopts following technical scheme:

This utility model Hydroxyapatite Coat Hip Joint Prossis comprises a handle body, and the upper end of this handle body is provided with the handle neck, and described handle body outer surface is provided with hydroxyapatite coating layer.

Wherein, the thickness of described hydroxyapatite coating layer is 40--800um.

Further, the top of described handle body is the nearly triangle bodily form, the bottom is the cylinder bodily form, and described handle body is tapered from top to bottom excessively, and inboard tapered excessive by the lateral, inboard, handle body is interior circular arc; The handle body outside is shape linearly.

Preferably, described handle body outer surface hydroxyapatite coating layer is arranged on the outer surface of handle body or is arranged on the outer surface of whole handle body.

Be socketed with the femur bulb on the described handle neck, this femur bulb overcoat is connected to acetabular bone, and the outer surface of described acetabular bone is provided with hydroxyapatite coating layer.

This utility model Hydroxyapatite Coat Hip Joint Prossis, by handle body outer surface the coating that one deck is made up of titanium coating and hydroxyapatite coating layer is set at hip prosthesis, make the prosthetic surface space network, in order to increase the roughness and the porosity of prosthetic surface, both had matsurface in prosthetic surface formation, the faying face that has tiny hole again, not only increase the faying face of new bone and prosthese, but also new bone can be grown in the hole of coating, increase the bond strength at new bone and prosthese interface; Simultaneously, because the main component of hydroxyapatite coating layer is Ca and P, consistent with the composition of human body sclerotin, in the generative process of new bone, on the one hand, has ossification, can provide Ca ion and P ion for the generation of new bone, promote and improve the formation speed of new bone, on the other hand, have the new osteogenesis effect of inducing, can induce new bone to be coated with layer growth to prosthetic surface, thereby promote combining of new bone and prosthese, further strengthen the bond strength at bone and prosthese interface, improved the fixed effect and the service life of prosthese.

Another purpose of the present utility model provides a kind of Hydroxyapatite Coat Hip Joint Prossis that can effectively increase prosthese and synosteosis intensity.

This utility model Hydroxyapatite Coat Hip Joint Prossis comprises a handle body, and the upper end of this handle body is provided with the handle neck, and described handle body outer surface is provided with coating, and this coating is by the titanium coating and be arranged on the outer hydroxyapatite coating layer of titanium coating and form.

Wherein, the thickness of described coating is 40--800um.

Preferably, described handle body external surface coating be arranged on the outer surface of handle body or be arranged on whole handle body appearance and.

Described handle neck is socketed with the femoral ball head outward, and this femur bulb overcoat is connected to acetabular bone, and the outer surface of described acetabular bone is provided with coating, and this coating is by the titanium coating and be arranged on the outer hydroxyapatite coating layer of titanium coating and form

This utility model Hydroxyapatite Coat Hip Joint Prossis, by acetabular bone outer surface the coating that one deck is made up of titanium coating and hydroxyapatite coating layer is set at hip prosthesis, make the prosthetic surface space network, in order to increase the roughness and the porosity of prosthetic surface, both had matsurface in prosthetic surface formation, the faying face that has tiny hole again, not only increase the faying face of new bone and prosthese, but also new bone can be grown in the hole of coating, increase the bond strength at bone and prosthese interface; Simultaneously, because the main component of hydroxyapatite coating layer is Ca and P, consistent with the composition of human body sclerotin, in the generative process of new bone, on the one hand, has ossification, can provide Ca ion and P ion for the generation of new bone, promote and improve the formation speed of new bone, on the other hand, have the new osteogenesis effect of inducing, can induce new bone to be coated with layer growth to prosthetic surface, thereby promote combining of new bone and prosthese, further strengthen the bond strength at new bone and prosthese interface, improved the fixed effect and the service life of prosthese.

Description of drawings

Fig. 1 is the structural representation of the preferred embodiment of this utility model Hydroxyapatite Coat Hip Joint Prossis;

Fig. 2 is the assembled sectional view of handle body, handle neck, femur bulb and the acetabular bone of this utility model Hydroxyapatite Coat Hip Joint Prossis;

Fig. 3 is the structural representation of handle body shown in Figure 2 and handle neck;

Fig. 4 is the cutaway view of femur bulb shown in Figure 2;

Fig. 5 is the cutaway view of mortar cup shown in Figure 2;

Fig. 6 is the cutaway view of mortar lining shown in Figure 2;

Fig. 7 is the cutaway view of mortar cup of another preferred embodiment of this utility model Hydroxyapatite Coat Hip Joint Prossis.

The specific embodiment

In order to make those skilled in the art person understand this utility model scheme better, and above-mentioned purpose of the present utility model, feature and advantage can be become apparent more, this utility model is described in further detail below in conjunction with drawings and Examples.

As shown in Figure 1 and Figure 2, the embodiment of this utility model Hydroxyapatite Coat Hip Joint Prossis, described hip prosthesis, comprise a handle body 10, the upper end of this handle body 10 is provided with handle neck 20, is socketed with femur bulb 30 on this handle neck 20, these femur bulb 30 outer acetabular bones 40 that are socketed with.Hip prosthesis of the present utility model is used for human hip substituting when damaging, during use, and described prosthese implant into body hip joint position, described handle body 10 inserts in the human femur under loading pulp cavity, in the described acetabular bone 40 implant into body acetabular fossa.

As shown in Figure 3, described handle body 10 tops are the nearly triangle bodily form, the bottom is the cylinder bodily form, the shape of this handle body 10 and the spatial shape of human femur under loading pulp cavity match, make things convenient for handle body 10 to insert in the femoral bone cavitas medullaris, the outer surface spacer ring of handle body 10 Lower Halves is established 2-4 axial groove 19, optimally, 4 axial grooves are set, play preventing 10 rotations of handle body and improving the blood supply effect; Described handle body 10 tops are tapered from top to bottom excessively, sink in order to prevent handle body 10; Handle body 10 tops by the outside 15 to the inside 16 tapered excessively, turn in the handle body 10 in order to preventing; Described handle body 10 upper inner are interior circular arc, and arc radius is 90～110mm, and optimum is 100mm, and handle body 10 outsides are shape linearly, match with the physiology shape of human femur under loading pulp cavity, are beneficial in the prosthese implant into body femoral bone cavitas medullaris; Handle body 10 first half surfaces are provided with shallow slot 18, and the quantity of shallow slot 18 is 2～5.

Described femur bulb 30 has the truncated cone-shaped groove, be socketed in the outside, truncated cone-shaped end of described handle neck 20, as shown in Figure 4, the truncated cone-shaped groove of this femur bulb 30 and the truncated cone-shaped end of handle neck 20, its smaller diameter end is arranged on handle body 10 ends far away, and larger diameter end is arranged on nearly handle body 10 ends, makes after

femur bulb

30 and 20 sockets of handle neck, under the pressure of human body weight, pressure is tight more more can not come off.

Fig. 2, Fig. 5, shown in Figure 6 for another example, described acetabular bone 40 is made up of hemispherical metal acetabular cup 41 and the polyethylene mortars lining 42 that is enclosed within the mortar cup 41, have the spherical groove suitable in this mortar lining 42 with femur bulb 30, mortar lining 42 is socketed in outside the femur bulb 30, femur bulb 30 can serve as a contrast in 42 at mortar and freely rotate, and realizes the human hip movable function; The outer surface of mortar cup 41 is equipped with 3-7 through hole 45, optimally, 4 through holes is set, in order to be connected auxiliary fixedly acetabular bone 40 with screw.

Mortar cup 41 outer surfaces of described handle body 10 and acetabular bone 40 are provided with one deck hydroxyapatite coating layer 50, and the thickness of this hydroxyapatite coating layer 50 is 40～800um, with the 150um best results; As shown in Figure 1, the hydroxyapatite coating layer 50 on these handle body 10 surfaces can be arranged on the outer surface on handle body 10 tops, also can be arranged on the outer surface of whole handle body 10; The hydroxyapatite coating layer 50 on mortar cup 41 surfaces is arranged on the outer surface of whole mortar cup 41; Mortar cup 41 outer surfaces of the handle body 10 of hip joint and acetabular bone 40 are provided with hydroxyapatite coating layer 50, in order to increase the roughness and the porosity of prosthetic surface, both had matsurface in prosthetic surface formation, had the faying face of tiny hole again, increased the fixed effect that bone is grown into.

As shown in Figure 7, as to further improvement of the utility model, the coating 50 that mortar cup 41 outer surfaces of described handle body 10 and acetabular bone 40 are provided with, also can and be arranged on titanium coating 51 outer hydroxyapatite coating layers 52 by titanium coating 51 forms, hydroxyapatite coating layer claims HA coating (hydroxyapatite again, Hydroxyapatite, abbreviation HA); The thickness of coating 50 is 40～800um, with the 150um best results; The coating 50 on these handle body 10 surfaces can be arranged on the outer surface on handle body 10 tops, as shown in Figure 1, also can be arranged on the outer surface of whole handle body 10; The coating 50 on mortar cup 41 surfaces is arranged on the outer surface of whole mortar cup 41; Mortar cup 41 outer surfaces of the handle body 10 of hip prosthesis and acetabular bone 40 are provided with coating 50, in order to increase the roughness and the porosity of prosthetic surface, have both had matsurface in prosthetic surface formation, have the faying face of tiny hole again, increase the fixed effect that bone is grown into.

This utility model is by being provided with the composite coating of being made up of titanium coating and hydroxyapatite coating layer at the handle body of hip prosthesis and the mortar cup outer surface of acetabular bone, make prosthetic surface form space network, can increase the roughness and the porosity of prosthetic surface, both had matsurface in prosthetic surface formation, the faying face that has tiny hole again, not only increase the faying face of bone and prosthese, but also new bone can be grown in the hole of coating, increase the bond strength at bone and prosthese interface; Simultaneously, because the main component of hydroxyapatite coating layer is Ca and P, consistent with the composition of human body sclerotin, in the generative process of new bone, on the one hand, has ossification, can provide Ca ion and P ion for the generation of new bone, promote and improve the formation speed of new bone, on the other hand, have the new osteogenesis effect of inducing, can induce new bone to be coated with layer growth to prosthetic surface, thereby promote combining of new bone and prosthese, further strengthen the bond strength at bone and prosthese interface, improved the constant intensity and the service life of prosthese.

The above; it only is the preferable specific embodiment of this utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that this utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claim.

Claims

1, a kind of Hydroxyapatite Coat Hip Joint Prossis comprises a handle body, and the upper end of this handle body is provided with the handle neck, it is characterized in that, described handle body outer surface is provided with hydroxyapatite coating layer.

2, Hydroxyapatite Coat Hip Joint Prossis according to claim 1 is characterized in that, the thickness of described hydroxyapatite coating layer is 40--800um.

3, Hydroxyapatite Coat Hip Joint Prossis according to claim 1, it is characterized in that the top of described handle body is the nearly triangle bodily form, the bottom is the cylinder bodily form, described handle body is tapered from top to bottom excessively, inboard tapered excessive by the lateral, inboard, handle body is interior circular arc; The handle body outside is shape linearly.

According to claim 1 or 3 described Hydroxyapatite Coat Hip Joint Prossis, it is characterized in that 4, described handle body outer surface hydroxyapatite coating layer is arranged on the outer surface of handle body or is arranged on the outer surface of whole handle body.

5, Hydroxyapatite Coat Hip Joint Prossis according to claim 1 is characterized in that, is socketed with the femur bulb on the described handle neck, and this femur bulb overcoat is connected to acetabular bone, and the outer surface of described acetabular bone is provided with hydroxyapatite coating layer.

6, Hydroxyapatite Coat Hip Joint Prossis according to claim 1, it is characterized in that, described handle neck is socketed with the femoral ball head outward, this femur bulb overcoat is connected to acetabular bone, the outer surface of described acetabular bone is provided with coating, and this coating is by the titanium coating and be arranged on the outer hydroxyapatite coating layer of titanium coating and form.

7, a kind of Hydroxyapatite Coat Hip Joint Prossis comprises a handle body, and the upper end of this handle body is provided with the handle neck, it is characterized in that, described handle body outer surface is provided with coating, and this coating is by the titanium coating and be arranged on the outer hydroxyapatite coating layer of titanium coating and form.

8, Hydroxyapatite Coat Hip Joint Prossis according to claim 7 is characterized in that, the thickness of described coating is 40--800um.

9, Hydroxyapatite Coat Hip Joint Prossis according to claim 7, it is characterized in that the top of described handle body is the nearly triangle bodily form, the bottom is the cylinder bodily form, described handle body is tapered from top to bottom excessively, inboard tapered excessive by the lateral, inboard, handle body is interior circular arc; The handle body outside is shape linearly.

According to claim 7 or 9 described Hydroxyapatite Coat Hip Joint Prossis, it is characterized in that 10, described handle body external surface coating is arranged on the outer surface of handle body or is arranged on the outer surface of whole handle body.