CN102551867B - Pelvis arcuate line lower edge anatomic bone fracture plate - Google Patents

Abstract

The utility model relates to an anatomical bone plate at the lower edge of the pelvic arcuate line, relates to surgical instrument manufacturing technology, and is suitable for fixing human pelvic fractures. The plate body of the present invention is a space arc-shaped curved body that matches the anatomical surface form of the lower edge of the pelvic arcuate line. There are fixing screw holes (3) on the plate surface, and equal-strength grooves (4) are placed on both sides of the plate. ). The anatomical bone plate at the lower edge of the pelvic arcuate line of the present invention can be used as a template for the reduction of fractures at the lower edge of the pelvic arcuate line, which helps to test the effect of fracture reduction, and can meet the internal fixation requirements of different types of pelvic entrances. The molded shape reduces the time-consuming shaping during the operation, avoids the influence of repeated shaping on the strength of the bone plate during the operation, effectively reduces the damage to the surrounding soft tissue during the mold trial process, and reduces the loss of fracture reduction, especially reducing the pain of the patient. It can also effectively reduce surgical risks and complications, and improve the success rate of pelvic fracture surgery and the effect of treatment.

Description

Anatomical bone plate at the lower edge of the pelvic arcuate line

technical field

The anatomical bone plate at the lower edge of the pelvic arcuate line relates to the surgical instrument manufacturing technology and is suitable for fixing human pelvic fractures.

Background technique

The number of cases of pelvic trauma caused by various traffic, construction and industrial accidents is increasing. Due to the special anatomical structure of the pelvis, especially the irregular arc shape of the bones at the arcuate line, it is necessary to pass through a specific surgical access window for exposure. The disorder of the anatomical structure and the rich soft tissue coverage in the operation area make the reduction and fixation operation after fracture complicated, and also lead to a high disability rate after pelvic fracture. At present, in the clinical fixation of fractures through the arcuate line of the pelvis, standard reconstruction plates are usually used to perform on-site shaping according to the anatomical shape of the arcuate line at the entrance of the pelvis to fix pelvic fractures. This surgical operation is technically difficult and time-consuming. Long and shaped steel plates are difficult to match well with the shape of the bone surface, and repeated mold trial and shaping are required, resulting in reduced strength of the bone plate, aggravated soft tissue damage during the mold trial process, and loss of fracture reduction due to mismatch between the bone plate and bone shape In addition, while increasing the operation time of the patient, the mismatch of the internal fixation may also cause secondary displacement of the fracture, increasing the risk of surgery and complications.

Contents of the invention

Aiming at the deficiencies of the existing pelvic fracture surgery, the inventor has proposed a method suitable for different groups of Chinese people through long-term research on the anatomical characteristics of the Chinese pelvic arcuate line and the overall medial surface of the pelvis, which can effectively reduce the impact on the surrounding area during the surgical trial process. Soft tissue damage can also be used as a template for pelvic fracture reduction, which helps to test the effect of fracture reduction, reduces surgical risks and complications, and improves the success rate of pelvic fracture surgery.

The present invention is achieved through the following technical scheme: the plate body of the anatomical bone plate at the lower edge of the arcuate line is a curved curved body in space that matches the anatomical shape under the arcuate line of the pelvis, and the bone plate is made of medical stainless steel or titanium alloy material The thickness of the plate is 3-4mm, the width is 14-16mm, the space length of the bone plate is 135-165mm, and the projected arc length of the bone plate arc on the pelvic entrance plane is 119.6-137.7mm. The included angle between the normal line of the arc end of the projection arc of the line on the pelvic inlet plane is 105.2°～124.2°. On the surface of the bone plate, 9 to 10 elliptical retaining screw holes are evenly arranged along the arc of the center of the plate, which are used to match the bone plate with the bone surface or surface soft tissue. The distance between the centers of two adjacent retaining screw holes along the central arc of the plate is 13-16mm. The screw holes are elliptical holes composed of two semicircular arcs with a curvature of 3-4mm and two line segments with a length of 2-3mm. The edge of the screw hole on the fitting surface of the plate and the bone, and the radius of the guide circle of the plate edge are 0.5mm, and the retaining screw hole on the non-fitting surface of the bone plate has a built-in 1mm retaining screw countersunk seat. 7 to 8 equal-strength grooves are evenly arranged on both sides of the plate along the side arc, and the equal-strength grooves and retaining screw holes are arranged at intervals along the length direction of the plate. The arc radius of the equal-strength grooves is 4-5mm; The end of the plate is arc-shaped, and the radius of curvature is 6.5-8.0 mm. The bone plate is fixed with cortical bone or cancellous bone screws to provide sufficient holding force for the fracture fragment. The anatomical shape of the bone plate reduces the time-consuming shaping during surgery and avoids the impact of repeated shaping on the strength of the bone plate.

The advantages of the present invention are: the anatomical bone plate at the lower edge of the arcuate line is in good agreement with the anatomical shape of the lower edge of the pelvic arcuate line, and the bone plate can meet the needs of all fractures at the lower edge of the arcuate line of the pelvis. The time-consuming on-site shaping of the bone plate avoids the loss of material strength, soft tissue damage, and loss of fracture reduction caused by poor shaping of the bone plate, especially reduces the pain of the patient, and can effectively reduce surgical risks and complications and improve the pelvis. Fracture surgery success and efficiency.

Description of drawings

The accompanying drawing is a schematic diagram of an embodiment of the present invention, wherein, the anatomical bone plate 1 at the lower edge of the pelvic arcuate line, the half pelvis 2, the retaining screw hole 3, the equal-strength groove 4, and the anatomical bone set at the lower edge of the androtype pelvic arcuate line Plate 5, female anatomical plate 6, anatomical plate 7, anatomical plate 7, anatomical plate 8, pelvic entrance plane 9 , the central arc of the anatomical bone plate at the lower edge of the arcuate line 10 , the projection curve 11 of the central arc of the anatomical bone plate at the lower edge of the arcuate line on the plane of the pelvic opening, and the plane of the pelvic entrance 12 .

Fig. 1 is the internal fixation schematic diagram of the anatomical bone plate at the lower edge of the pelvic arcuate line of the present invention;

Fig. 2 is a schematic structural view of the anatomical bone plate at the lower edge of the pelvic arcuate line of the present invention;

Fig. 3 is a schematic diagram of various types of anatomical bone plates at the lower edge of the pelvic arcuate line of the present invention;

Fig. 4. Schematic diagram of the projection of the arc of the anatomical bone plate of the present invention on the plane of the entrance of the pelvis within the lower edge of the arcuate line.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

The body of the anatomical bone plate at the lower edge of the arcuate line of the present invention is a space arc-shaped curved body that matches the shape of the inner surface of the bone at the arcuate line of the pelvis. It is made of medical stainless steel or titanium alloy material, and the thickness of the plate is 3-4 mm. The width is 14-16mm, and the central arc length of the plate is 135-165mm; there are 9-10 retaining screw holes evenly distributed along the central arc of the plate, and the distance between the centers of two adjacent screw holes along the central arc of the plate is 13-16mm , the screw hole consists of two semicircular arcs with a radius of 2mm and two line segments with a length of 2mm to form an elliptical hole; the side of the board is evenly distributed along the side arc with 7 to 8 equal-strength grooves, and the grooves and screw holes are along the board. The length direction of the plate is staggered, the arc radius of the groove is 4-5mm, the end surface of the plate is arc-shaped, and the radius of curvature is 6.5-8.0mm.

According to the research data of the pelvis of normal Chinese people, the anatomical bone plate at the lower edge of the arcuate line of the present invention can be divided into four types: male type, female type, flat type, and anthropoid type. Male type: arc length 135-155mm; female type: arc length Length 135~165mm; flat type: arc length 135~155mm; anthropoid type: 135~155mm. The shape of the entrance of the pelvis can also be simply divided into four types: horizontal ellipse, round, and vertical ellipse clinically. Project the central arc of the anatomical bone plate at the lower edge of the four types of arcuate lines into the pelvic inlet plane, and the characteristics of the projection curves are obtained from three aspects: ①The included angle of the normal line at the arc end of the projected arc at the male-type pelvic inlet plane → 105.2° , arc length→119.6, radius of curvature→21.4～140.5. ②The included angle of the normal line at the arc end of the projected arc of the female type pelvic entrance plane → 115.4°, the arc length → 136.2mm, and the curvature radius → 31.1-105.6. ③The included angle of the normal line at the arc end of the projection arc of the flat pelvic entrance plane → 124.2°, the arc length → 119.7, and the curvature radius → 16.8-103.2. ④The angle between the normal line at the arc end of the projection arc of the entrance plane of the ape-shaped pelvis→117.4°, the arc length→137.7mm, and the radius of curvature→20.3～145.4.

Claims (3)

1. The anatomical bone plate at the lower edge of the arcuate line is characterized in that: the anatomical bone plate at the lower edge of the arcuate line (1) is a space arc-shaped curved body that matches the anatomical shape of the lower edge of the arcuate line of the pelvis, and the bone plate is transversely The cross-section is arc-edge rectangular, the plate thickness is 3-4mm, the width is 14-16mm, the space length of the bone plate is 135-165mm; the plate is evenly distributed along the center arc of the plate with 9-10 retaining screw holes (3), the distance between the centers of two adjacent retaining screw holes (3) along the central arc of the plate is 13-16 mm, and the edge contour of the retaining screw holes (3) consists of two semicircular arcs with a radius of 2 mm and two lengths of The 2mm line segment forms an elliptical hole; the side of the plate is provided with 7 to 8 equal-strength grooves (4) along the side arc, and the equal-strength grooves (4) and the retaining screw holes (3) are arranged at intervals along the length direction of the plate. The arc radius of the equal-strength groove (4) is 4-5 mm, the end face of the bone plate (1) is arc-shaped, and the radius of curvature is 6.5-8.0 mm; The included angle between the normal line of the projection arc end of the anatomical bone plate (1) at the lower edge of the arcuate line on the plane of the entrance of the pelvis is 105.2° to 124.2°; The projected arc length of the anatomical bone plate (1) space length arc at the lower edge of the arcuate line on the pelvic inlet plane is 119.6-137.7 mm. the 2. The anatomical bone plate at the lower edge of the arcuate line according to claim 1, characterized in that: the anatomical bone plate at the lower edge of the arcuate line (1) is made of medical stainless steel or titanium alloy. the 3. The anatomical bone plate at the lower edge of the arcuate line according to claim 1, characterized in that: the anatomical bone plate at the lower edge of the arcuate line (1) and the retention screw hole (3) on the fitting surface of the bone The radius of the edge and plate edge circle is 0.5mm, and the retaining screw hole (3) on the non-adapting surface of the plate has a built-in 1mm retaining screw countersunk seat. the