A vertebral facet joint fusion fixation device having a three-dimensional lattice body is provided, which is integrally formed by a metal powder additive manufacturing method or a three-dimensional printing method and is utilized for being implanted between an upper facet joint and a lower facet joint of two adjacent vertebral bodies. The vertebral facet joint fusion fixation device comprises a first fusion surface, a second fusion surface, and three-dimensional lattice bodies disposed between the first and second fusion surfaces, in which the first and second fusion surfaces are respectively located at two sides that are oppositely arranged, and each three-dimensional lattice body comprises a plurality of multilayer-stacked micropores. With the disclosed vertebral facet joint fusion fixation device implanted between the upper and lower facet joints of the two adjacent vertebral bodies, the two adjacent vertebral bodies can be opened so as to alleviate spinal stenosis. Besides, neo-osteocyte can be deep-rootedly went into each of mutually-stacked microspores of the respective three-dimensional lattice bodies, so that a well-fusion condition of the two adjacent vertebral bodies can be obtained.一種具立體網格體之脊椎小面關節融合固定器,係以金屬粉末積層(additive manufacturing或3D printing)一體成型,用以植入於兩相鄰椎體之上小面關節與下小面關節間,係包含:位於相對兩側之第一融合面及第二融合面;以及設於該第一融合面與第二融合面之立體網格體,各該立體網格體係含有多數呈多層堆疊狀之多數微孔,使本發明植入兩相鄰椎體的上小面關節與下小面關節間後,除可以撐開兩相鄰椎體,改善椎管狹窄症外,新生之骨細胞可以盤根錯節地深入位於各該立體網格體呈相互堆疊狀之各微孔內,使相鄰兩椎體可以獲得良好的融合。(10)‧‧‧脊椎小面關節融合固定器(10a)‧‧‧銜接孔(10b)‧‧‧凹部或穿孔(11)‧‧‧第一融合面(12)‧‧‧第二融合面(13)‧‧‧立體網格體(14)‧‧‧芯部(141)‧‧‧導引孔(15)‧‧‧齒部(16)‧‧‧邊緣(T)‧‧‧工具
