一種新式模塊化有軸脛骨移植物，能夠裝配在患者體內(nèi)，從而將手術(shù)創(chuàng)傷性降低到最小。這種脛骨配件已經(jīng)得到了美國食品藥品管理局的批準(zhǔn)。

這種新型移植物設(shè)計用于微創(chuàng)侵入性解決方案（MIS），這是一種由Zimmer控股公司提供的全膝關(guān)節(jié)手術(shù)方案，特別適合于Zimmer MIS四頭肌保全的全關(guān)節(jié)手術(shù)，該技術(shù)設(shè)計保留四頭肌肌腱和肌肉，而不是切除或者處理它們。與傳統(tǒng)的全關(guān)節(jié)置換手術(shù)相比較，四頭肌保全技術(shù)的切口較小而且較不明顯，產(chǎn)生的組織血腫也較小。同時患者住院時間較短，運動范圍的恢復(fù)也更快。

其中一項允許移植物能夠適應(yīng)較小的暴露的設(shè)計元素是外型輪廓以及龍骨長度較小。龍骨長度減少使得通過較小開口將移植物插入關(guān)節(jié)中成為可能。在將移植物固定到脛骨近端之后，軸的延伸部分能夠從骨板中伸出。Zimmer公司相信：這種新型移植物設(shè)計的額外好處將使得微創(chuàng)侵入性手術(shù)變得更加方便。

Robert Wood Johnson醫(yī)學(xué)院整形外科手術(shù)臨床教授四頭肌保留技術(shù)的開發(fā)者 Alfred J. Tria說：“MIS有軸脛骨骨板使得我們能夠在很小的切口范圍內(nèi)將部件植入，能夠更加方便地進(jìn)行四頭肌保留膝關(guān)節(jié)置換手術(shù)。”
 
Minimally Invasive Tibial Prosthesis
 
A new modular stemmed tibial prosthesis can be assembled within a patient, making the procedure minimally invasive. This tibial component has been cleared by the U.S. Food and Drug Administration (FDA).

The novel implant is designed to be used with all of the minimally invasive solutions (MIS) offered for total knee procedures by Zimmer Holdings, Inc. (Warsaw. IN, USA), and is particularly well suited for use with the Zimmer MIS quad-sparing total knee procedure, a technique designed to avoid the quadriceps tendon and muscles rather than cutting through or manipulating them. When compared to traditional total knee replacement techniques, the quad-sparing technique is accomplished through a smaller and less conspicuous incision and produces less tissue trauma. Also, patients usually require a shorter hospital stay and experience a faster improvement in range of motion.

One of the design elements that permits the implant to accommodate a smaller exposure is the low profile and the length of the keel. The subsequent reduced keel length allows the implant to be inserted into the joint through a smaller opening. After the implant has been fixed in place on the proximal tibia, a stem extension can be dropped down through the plate. Zimmer believes that the additional benefits of the new implant design will further facilitate the minimally invasive procedure.

“The MIS stemmed tibial plate will allow us to insert the component within the confines of the small incision for quadriceps-sparing knee replacement with greater ease,” said Alfred J. Tria, Jr., a developer of the quad-sparing technique and a clinical professor of orthopedic surgery at Robert Wood Johnson Medical School (New Brunswick, NJ, USA).