CN100594859C - Knee varus and valgus deformity corrector - Google Patents
Knee varus and valgus deformity corrector Download PDFInfo
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- CN100594859C CN100594859C CN200810015103A CN200810015103A CN100594859C CN 100594859 C CN100594859 C CN 100594859C CN 200810015103 A CN200810015103 A CN 200810015103A CN 200810015103 A CN200810015103 A CN 200810015103A CN 100594859 C CN100594859 C CN 100594859C
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Abstract
本发明涉及一种膝关节内、外翻畸形矫正器，它包括大腿套箍和小腿套箍，还包括设置在腿内侧、外侧或两侧，且分别通过连接板与所述大腿套箍和小腿套箍紧固连接的万向节，以及通过连接板与所述小腿套箍连接的脚套箍。其中万向节能够要其中心轴线转动，且在两连接杆连接处折弯；脚套箍则通过连接板与小腿套箍铰接。本发明能够使患者像正常人一样行走的情况下，使膝关节磨损面自然恢复，使用方便，成本低廉。
The invention relates to a knee joint varus and valgus deformity corrector, which includes a thigh hoop and a calf hoop, and also includes a leg hoop arranged on the inner side, the outer side or both sides of the leg, and connected to the thigh hoop and the lower leg through a connecting plate respectively. The hoop is fastened to the universal joint, and the foot hoop is connected to the shank hoop through the connecting plate. Wherein the universal joint can rotate its central axis and is bent at the junction of the two connecting rods; the foot hoop is hinged with the lower leg hoop through the connecting plate. The invention can make the worn surface of the knee joint recover naturally when the patient walks like a normal person, and is convenient to use and low in cost.
Description
(一)技术领域(1) Technical field
本发明涉及一种膝关节内、外翻畸形矫正器，尤其是涉及一种可调式膝关节内、外翻畸形矫正器，属于医疗器械技术领域。The invention relates to a knee joint varus and valgus deformity corrector, in particular to an adjustable knee varus and valgus deformity corrector, which belongs to the technical field of medical devices.
(二)背景技术(2) Background technology
随着我国人口的老龄化，膝关节骨性关节炎的发病率也呈上升趋势。该疾病是引起老年人膝关节疼痛的主要原因之一，50岁以上的人，膝关节常有膝关节骨性关节炎的表现。With the aging of my country's population, the incidence of knee osteoarthritis is also on the rise. The disease is one of the main causes of knee pain in the elderly. People over the age of 50 often have knee osteoarthritis.
骨性关节炎早期症状为主动活动时出现髌下摩擦感及疼痛，上下楼梯及坐位站起时疼痛感加重，当因外伤或扭伤后可出现膝关节肿胀、关节积液。因疼痛及股四头肌无力，膝关节可出现“闪失”现象，给予保守治疗及休息1-2月症状即可消失，但因轻微外伤易反复。晚期因病情逐步发展可出现股四头肌萎缩、膝关节粗大、关节活动受限，主动及被动活动范围逐步减少，关节疼痛加重，平路行走或站立时也会出现疼痛感，膝关节出现内翻或外翻畸形，关节韧带出现松弛，引起关节不稳感，X线拍片早期常为阴性，偶见髌骨侧位片上下缘有小骨刺增生。随病情发展，可出现关节间隙狭窄，软骨下骨板致密，关节边缘及髁间嵴骨质增生严重者站立位摄前后位片，可出现膝关节内侧或外侧间隙狭窄，严重者关节间隙消失，股胫角发生异常改变，因关节韧带松弛可出现膝关节不全滑脱。The early symptoms of osteoarthritis are infrapatellar friction and pain during active activities, and the pain is aggravated when going up and down stairs and when standing up from a sitting position. Knee joint swelling and joint effusion may occur after trauma or sprain. Due to the pain and weakness of the quadriceps, the knee joint may appear "missing". The symptoms can disappear after conservative treatment and rest for 1-2 months, but it is easy to repeat due to minor trauma. In the late stage, due to the gradual development of the disease, quadriceps atrophy, enlarged knee joint, limited joint movement, gradually reduced active and passive range of motion, aggravated joint pain, pain when walking or standing on flat roads, and inner knee joint For valgus or valgus deformity, the ligaments of the joints are loose, causing a sense of joint instability. The X-ray film is often negative in the early stage, and occasionally there is a small spur hyperplasia on the upper and lower edges of the lateral patella. As the disease progresses, the joint space may be narrowed, the subchondral bone plate may be dense, and the bone hyperplasia of the joint edge and intercondylar ridge is severe. When taking anteroposterior radiographs in standing position, the medial or lateral space of the knee joint may be narrowed. In severe cases, the joint space may disappear. Abnormal changes in the femoro-tibial angle, and incomplete slippage of the knee joint may occur due to laxity of the articular ligaments.
因膝关节股胫角及关节间隙的改变，使膝关节面失去了正常的受力关系，出现了膝关节内翻或外翻畸形，受压应力重的一侧关节面，因负荷过大，导致关节软骨面严重磨损而破坏。为了矫正股胫角及膝内、外翻畸形，通常采取截骨矫正畸形，严重者可行膝关节表面置换等手术治疗，但因骨性关节炎多发生在老年人，而老年人自身健康状况相对较差，如多患有心、脑血管等疾病，限制了手术治疗范围；另外因对手术存有恐惧心理以及关节置换所需的昂贵手术费用，一般家庭不容易接受，延误了对疾病的治疗，严重者可出现致残。Due to the change of the femoro-tibial angle and the joint space of the knee joint, the normal stress relationship of the knee joint surface is lost, and a varus or valgus deformity of the knee joint occurs. Lead to severe wear and tear on the articular cartilage surface. In order to correct the femorotibial angle and knee varus and valgus deformity, osteotomy is usually used to correct the deformity. In severe cases, surgery such as knee joint surface replacement can be performed. However, osteoarthritis mostly occurs in the elderly, and the elderly’s own health status is relatively Poor, such as suffering from cardiovascular and cerebrovascular diseases, which limits the scope of surgical treatment; in addition, due to the fear of surgery and the expensive surgical costs required for joint replacement, ordinary families are not easy to accept, which delays the treatment of the disease. In severe cases, disability may occur.
另外一些先天性的膝内翻、外翻，也就是大家平时所说的“o”形腿、“x”形腿，目前治疗法主要有：内科对病情轻、年龄小的婴幼儿采用大剂量补给维生素D，畸形较重者，则采用石膏加螺旋撑开器的方法；年龄较大患者根据病情也有采用折骨术或者截骨术矫正的。对于采用石膏加螺旋撑开器的方法，患儿须在床上保持一定的体位姿势，几周内不能下地活动，患儿难以承受；而采用折骨术或截骨术矫正属于人为骨折，对技术要求比较高，患者痛苦大，所需费用高，许多患者难于接受，错失良好的治疗时机。Other congenital genu varus and genu valgus, which are commonly referred to as "o"-shaped legs and "x"-shaped legs, are currently treated with: internal medicine for mild and young infants with large doses Vitamin D is supplemented, and plaster and spiral spreader are used for severe deformities; older patients are also corrected by fracture or osteotomy according to the condition. For the method of plaster and spiral spreader, the child must maintain a certain posture on the bed, and cannot move on the ground within a few weeks, which is difficult for the child to bear; while the correction of osteotomy or osteotomy is an artificial fracture, which is difficult for the technology. The requirements are relatively high, the patients suffer greatly, and the required cost is high. Many patients are difficult to accept and miss a good opportunity for treatment.
目前出现了很多机械矫正膝关节内翻、外翻畸形的器具，其中中国知识产权局于2004年12月15日公开了一种可前后向调节的膝盖支架，名称为“可前后调节的膝盖支架”，申请号为9981344.6，授权公告号为CN1179709C。该发明对现有矫正膝关节内翻、外翻畸形的器具作了比较详细地描述，且其采用大腿套箍和小腿套箍由一仅设置在膝盖支架一侧的铰链部连接的方案，铰链部可提供前后向的矫正力，以将膝盖的位置矫正成外翻或内翻。但该方案由于靠铰链部连接大腿套箍和小腿套箍，仅仅是对膝盖位置进行矫正，仍然无法避免膝关节的摩擦，并不能使膝关节受损面节本身恢复的要求。At present, there are many devices for mechanically correcting the varus and valgus deformities of the knee joint. Among them, the China Intellectual Property Office disclosed a knee support that can be adjusted forward and backward on December 15, 2004, and the name is "knee support that can be adjusted forward and backward." ", the application number is 9981344.6, and the authorized announcement number is CN1179709C. This invention describes in detail the existing devices for correcting varus and valgus deformities of the knee joint, and it adopts a scheme in which the thigh hoop and the calf hoop are connected by a hinge part provided only on one side of the knee bracket. The front and back can provide corrective force to correct the position of the knee into valgus or varus. However, this solution only corrects the position of the knee because the hinge connects the thigh hoop and the shank hoop, and still cannot avoid the friction of the knee joint, and cannot make the knee joint damaged surface joint itself recover.
(三)发明内容(3) Contents of the invention
本发明针对目前手术矫正膝关节内翻、外翻患者痛苦大、费用高，石膏加螺旋撑开器需卧床时间长，患者不能随便活动的缺陷，提供了一种使用方便，患者可自由活动，成本低的膝关节内、外翻畸形矫正器。The present invention aims at the defects that patients with varus and valgus of the knee joint undergo surgery to correct the pain and high cost, the plaster and the spiral spreader need to lie in bed for a long time, and the patient cannot move freely, and provides a convenient and easy-to-use method for the patient to move freely. Low-cost knee joint varus and valgus deformity corrector.
本发明采用以下技术方案：The present invention adopts following technical scheme:
本发明膝关节内、外翻畸形矫正器包括大腿套箍和小腿套箍，还包括设置在腿内侧、外侧或两侧，且分别通过连接板与所述大腿套箍和小腿套箍紧固连接的万向节，以及通过连接板与所述小腿套箍连接的脚套箍。其中万向节包括焊接于大腿套箍连接板上且具有内螺纹的钢筒、与该钢筒螺纹配合具有内外螺纹的钢筒、与该具有内外螺纹钢筒螺纹配合的连接杆、通过销轴与该连接杆另一端活动连接的连接杆和焊接于小腿套箍连接板上的钢筒。与小腿套箍连接的连接杆另一端设有轴环，该轴环外侧轴段设置有环槽，对应钢筒相应设置与上述轴环和轴段、轴孔配合的光孔，并设置借助上述环槽对该连接杆轴向限位的螺钉。脚套箍则通过连接板与小腿套箍铰接。The knee joint varus and valgus deformity corrector of the present invention includes a thigh hoop and a calf hoop, and also includes a hoop arranged on the inner side, the outer side or both sides of the leg, and is respectively fastened and connected with the thigh hoop and the lower leg hoop through a connecting plate. The universal joint, and the foot hoop connected with the shank hoop through the connecting plate. The universal joint includes a steel cylinder welded on the connecting plate of the thigh hoop and has internal threads, a steel cylinder with internal and external threads that is threaded with the steel cylinder, a connecting rod that is threaded with the steel cylinder with internal and external threads, and a pin shaft A connecting rod movably connected with the other end of the connecting rod and a steel cylinder welded on the connecting plate of the shank hoop. The other end of the connecting rod connected with the calf hoop is provided with a collar, and the outer shaft section of the collar is provided with a ring groove, and the corresponding steel cylinder is provided with a light hole matching the above-mentioned collar, shaft section, and shaft hole, and is provided with the aid of the above-mentioned The ring groove is the screw for the axial limit of the connecting rod. The foot hoop is hinged with the shank hoop through the connecting plate.
上述膝关节内、外翻畸形矫正器，所述大腿套箍、小腿套箍和脚套箍与人体生理结构相适应，其中大腿套箍和小腿套箍相应于人体生理结构留有3-5cm的裕度，相应于腿后侧部分为敞口，且两者还设有用于绑扎的粘扣带；脚套箍与脚底结构相适应，其他面为敞口。The above-mentioned knee joint varus and valgus deformity correction device, the thigh hoop, calf hoop and foot hoop are adapted to the physiological structure of the human body, wherein the thigh hoop and the shank hoop leave a gap of 3-5 cm corresponding to the human physiological structure. The margin corresponds to the opening of the back part of the leg, and both are provided with Velcro for binding; the foot hoop is adapted to the structure of the sole of the foot, and the other surfaces are open.
上述膝关节内、外翻畸形矫正器，大腿套箍、小腿套箍和脚套箍为均布有通气孔的塑料基体，且其内侧设有棉质衬里。或者在大腿套箍、小腿套箍前侧设置一个长条孔，其内侧设置均布有孔的海绵或棉质衬里。The above-mentioned knee joint varus and valgus deformity corrector, the thigh hoop, calf hoop and foot hoop are plastic substrates uniformly distributed with ventilation holes, and a cotton lining is provided on the inner side. Or a long strip hole is set on the front side of the thigh hoop and calf hoop, and a sponge or cotton lining with holes evenly distributed is arranged on the inner side thereof.
上述膝关节内、外翻畸形矫正器，所述具有内螺纹的钢筒设有与其配合的钢筒的锁止螺钉，该钢筒则设有与其配合的连接杆的锁止螺钉。In the aforementioned knee joint varus and valgus deformity corrector, the steel cylinder with internal thread is provided with a locking screw of a steel cylinder matched with it, and the steel cylinder is provided with a locking screw of a connecting rod matched with it.
本发明膝关节内、外翻畸形矫正器包括绑扎于大腿和小腿的大腿套箍和小腿套箍，以及万向节，该万向节通过连接板与大腿套箍和小腿套箍连接。上述万向节包括通过销轴相连的两连接杆，销轴连接方式是一种转动副，也就是两构件可以绕销轴轴线旋转，从而实现两连杆构成的机构可以在此处自由弯曲。同时连接于小腿向的连杆另一端设有轴环，该轴环外侧轴段设置有环槽，对应钢筒相应设置与上述轴环和轴段、轴孔配合的光孔，因形状相应，也就是说在钢筒内孔存在有台阶，用于承受该连接杆的压力。此外该钢筒设置借助上述环槽对该连接杆轴向限位的螺钉，防止其脱离钢筒，且不影响其转动，该结构可以使连接杆绕其轴线回转。从而实现该万向节的转动和在两连接杆连接处的折弯。同时大腿侧的连节杆部分主要通过螺纹连接，可以通过转动螺纹调节两腿套间的距离。实际使用时给病人患肢安装此器具，大腿套箍和小腿套箍用于给该矫正器限位，根据患肢实际矫正的需要，万向节设于腿内侧或外侧，也可以两侧都设置，通过调整大腿侧螺纹，来矫正患肢骨胫角的角度，使膝内翻或者外翻畸形的一侧关节受损面减轻负荷，防止进一步磨损破坏。小腿侧连杆通过回转自动调整两连接杆使销轴转动轴线与人膝关节运动轴线一致，可以使万向节随人腿运动折弯，也就实现了患者不必卧床静养，戴上该矫正器，可以和正常人一样走路，利用该矫正器撑开畸形部位，形成机械矫正，关节受损面则相应减轻了负荷，有利于其自然恢复。同时为了把承重传递到地面，脚套箍则通过连接板与小腿套箍铰链连接，这样同时也防止小腿套箍因承重滑落，铰链连接也是一种回转副，可以使脚套箍与人踝关节运动一致。The knee joint varus and valgus deformity corrector of the present invention includes a thigh hoop and a calf hoop bound to the thigh and lower leg, and a universal joint connected to the thigh hoop and the lower leg hoop through a connecting plate. The above-mentioned universal joint includes two connecting rods connected by a pin shaft. The pin shaft connection mode is a rotating pair, that is, the two components can rotate around the pin shaft axis, so that the mechanism formed by the two connecting rods can be freely bent here. At the same time, the other end of the connecting rod connected to the lower leg is provided with a collar, and the outer shaft section of the collar is provided with a ring groove, and the corresponding steel cylinder is provided with a light hole matching the above-mentioned collar, shaft section, and shaft hole. Because of the corresponding shape, That is to say, there is a step in the inner hole of the steel cylinder for bearing the pressure of the connecting rod. In addition, the steel cylinder is provided with a screw for axially limiting the connecting rod by means of the above-mentioned annular groove, preventing it from detaching from the steel cylinder and not affecting its rotation. This structure allows the connecting rod to rotate around its axis. Thereby, the rotation of the universal joint and the bending at the junction of the two connecting rods are realized. At the same time, the connecting rod part on the thigh side is mainly connected by threads, and the distance between the two leg sleeves can be adjusted by rotating the threads. In actual use, the device is installed on the affected limb of the patient. The thigh hoop and calf hoop are used to limit the position of the orthotic. The setting is to correct the angle of the tibial angle of the affected limb by adjusting the thread on the side of the thigh, so as to reduce the load on the damaged joint surface on the side of the genu varus or valgus deformity, and prevent further wear and tear. The connecting rod on the calf side automatically adjusts the two connecting rods through rotation so that the rotation axis of the pin shaft is consistent with the motion axis of the human knee joint. , can walk like a normal person, use the orthotic to stretch the deformed part to form a mechanical correction, and the load on the damaged joint is correspondingly reduced, which is conducive to its natural recovery. At the same time, in order to transfer the load to the ground, the foot hoop is hinged to the calf hoop through the connecting plate, which also prevents the calf hoop from slipping due to the load. The hinge connection is also a rotary pair, which can make the foot hoop and the human ankle joint Movement is consistent.
本发明膝关节内、外翻畸形矫正器的大腿套箍、小腿套箍和脚套箍与人体生理结构相适应，使用起来比较舒服。其中大腿套箍和小腿套箍相应于人体生理结构留有3-5cm的裕度，穿着方便。相应于腿后侧部分为敞口，且两者还设有用于绑扎的粘扣带，利用套箍自身的变形，通过粘扣带进行绑扎，非常方便。而脚套箍与脚底结构相适应，其他面为敞口，结构简单，也便于穿鞋子。The thigh hoop, shank hoop and foot hoop of the knee joint varus and valgus deformity corrector of the present invention are compatible with the physiological structure of the human body and are comfortable to use. Among them, the thigh hoop and the calf hoop leave a margin of 3-5cm corresponding to the physiological structure of the human body, which is convenient to wear. Correspondingly, the rear part of the leg is open, and both are also provided with a Velcro belt for binding. Utilizing the deformation of the hoop itself, the binding is performed through the Velcro belt, which is very convenient. The foot hoop is adapted to the sole structure, and the other surfaces are open, and the structure is simple, which is also convenient for wearing shoes.
本发明膝关节内、外翻畸形矫正器大腿套箍、小腿套箍和脚套箍为均布有通气孔的塑料基体，且其内侧设有棉质衬里，一个是塑料比较容易成型，制造成本低廉，同时在其上面均布通气孔和设置棉质衬里，使用舒适性比较好。也可以采用在大腿套箍、小腿套箍前侧设有一个长条孔，其内侧设置均布有孔的海绵或棉质衬里，这种方案也能起到穿着舒适性的作用，比前一种方案使用舒适性稍差，但因不必设置那么多的孔，便于制造，成本较低。The knee joint varus and valgus deformity correction device of the present invention is a plastic base body uniformly distributed with ventilation holes, and a cotton lining is provided on the inner side. One is that plastic is easier to form, and the manufacturing cost is relatively low. It is cheap, and at the same time, the air holes are evenly distributed on it and the cotton lining is set on it, which makes it more comfortable to use. It is also possible to set a long hole on the front side of the thigh hoop and calf hoop, and set a sponge or cotton lining evenly distributed on the inner side. This scheme can also play a role in wearing comfort, which is better than the previous one. This kind of scheme is slightly less comfortable to use, but it is easy to manufacture because there is no need to set so many holes, and the cost is low.
考虑到螺纹连接在振动等情况下的松脱，本发明在具有内螺纹的钢筒设有与其配合钢筒的锁止螺钉，后者则设有与其配合连接杆的锁止螺钉。待调整两腿套距离到使用距离时，拧紧锁止螺钉对两螺纹连接处进行锁紧即可。Considering the loosening of the threaded connection under conditions such as vibration, the steel cylinder with internal threads is provided with a locking screw matching the steel cylinder in the present invention, and the latter is provided with a locking screw matching the connecting rod. When the distance between the two leg sleeves is adjusted to the use distance, tighten the locking screw to lock the two threaded joints.
(四)附图说明(4) Description of drawings
图1为本发明膝关节内、外翻畸形矫正器原理剖视结构示意图。Fig. 1 is a schematic sectional structural schematic diagram of the principle of the knee joint varus and valgus deformity corrector of the present invention.
图2为本发明膝关节内、外翻畸形矫正器的万向节部件结构原理图。Fig. 2 is a structural principle diagram of the universal joint part of the knee joint varus and valgus deformity corrector of the present invention.
图中，1、大腿套箍，2、连接板，3、万向节，4、连接板，5、小腿套箍，6、连接板，7、脚套箍，8、钢筒，9、锁止螺栓，10、锁止螺栓，11、钢筒，12、连接杆，13、连接杆，14、轴环，15、聚氨酯轴套，16、钢筒，17、环槽。In the figure, 1. Thigh hoop, 2. Connecting plate, 3. Universal joint, 4. Connecting plate, 5. Calf hoop, 6. Connecting plate, 7. Foot hoop, 8. Steel cylinder, 9. Lock Stop bolt, 10, lock bolt, 11, steel cylinder, 12, connecting rod, 13, connecting rod, 14, collar, 15, polyurethane bushing, 16, steel cylinder, 17, ring groove.
(五)具体实施方式(5) Specific implementation methods
实施例1：Example 1:
参照说明书附图1和2，本发明膝关节内、外翻畸形矫正器包括大腿套箍1和小腿套箍5，以及设置在腿内侧，且分别通过连接板2、4与所述大腿套箍1和小腿套箍5紧固连接的万向节3，以及通过连接板6与所述小腿套箍连接的脚套箍7。上述连接板采用不锈钢钢板，主要考虑其强度，采用强度高的钢板，可实现较小的尺寸，就能达到所需的强度要求，也使得矫正器结构更紧凑。With reference to accompanying
其中万向节包括焊接于连接板2且具有内螺纹的钢筒8、与该钢筒螺纹配合的钢筒11、与钢筒11螺纹配合的连接杆12、通过销轴与该连接杆另一端活动连接的连接杆13和焊接于上述连接板4上的钢筒16，上述连接杆13另一端设有轴环14，该轴环外侧轴段设置有环槽17，钢筒16相应设置与上述轴环和轴段、轴孔配合的光孔，并设置借助上述环槽对连接杆13轴向限位的螺钉。为了减少使用中产生噪音和缓冲需要，在轴环14和钢筒16台面接触加一聚氨酯轴套15。Among them, the universal joint includes a
脚套箍7与连接板6间通过铰链连接，构造人工踝关节，能随人走路时的动作而动作。The
本发明膝关节内、外翻畸形矫正器的大腿套箍1、小腿套箍2和脚套箍3与人体生理结构相适应，其中大腿套箍和小腿套箍相应于人体生理结构留有3cm的裕度，相应于腿后侧部分为敞口，这主要为便于穿戴。且两者还都设有用于绑扎的粘扣带。脚套箍与脚底结构相适应，其他面为敞口。其中大腿套箍、小腿套箍和脚套箍3为均布有通气孔的塑料基体，且在其内侧设置棉质衬里。The
本发明膝关节内、外翻畸形矫正器，所述内螺纹钢筒8设有所述钢筒11的锁止螺钉9，钢筒11则设有所述连接杆12的锁止螺钉10。In the knee joint varus and valgus correction device of the present invention, the internally threaded
本实施例主要应用于膝内翻或外翻畸形的内侧关节存在受损面的情形。This embodiment is mainly applied to the situation where the medial joint of knee varus or valgus deformity has a damaged surface.
实施例2：Example 2:
参照说明书附图1和2，本实施理想应于实施例1，主要区别是为应用于膝内翻或外翻畸形的外侧关节存在受损面的情况，也就是万向节3设置右腿外侧。同时考虑到制造成本，采用大腿套箍1、小腿套箍2前侧设有一个长条孔，其内侧设置均布有孔的海绵或棉质衬里。大腿套箍和小腿套箍相应于人体生理结构留有4cm的裕度。其实此裕度越大，越容易穿戴，但对绑扎会带来不利影响，也就是为平衡腿套基体的回弹力，需要更大的绑扎力。此尺寸最大为5cm，太大了则所需绑扎力过大，不容易绑扎牢固。With reference to accompanying
实施例3：Example 3:
参照说明书附图1和2，其实为有得到更理想矫正效果，无论是膝内翻或外翻畸形那一侧关节面受损，如果采用在腿内外侧个设置一个万向节3会有更好的效果。一个是因采用两个万向节使得整个矫正器结构强度高，稳定性好，再就是调整更方便。对于整个关节面都受损的情况，这是本发明中必然的选择了。Refer to Figures 1 and 2 of the instruction manual. In fact, in order to obtain a more ideal correction effect, no matter whether the articular surface is damaged on the side of the knee varus or valgus deformity, if a
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