The finale segment of the spine is the lower portion of the back located near the tail bone.
脊柱的最后一段是背部的下半部位，处于靠近尾骨的地方。
TLIF is generally used to treat back or leg pain caused by degenerative disc disease. The surgeon will stabilize the spine by fusing vertebrae together with bone graft material.
TLIF手术通常用于治疗因椎间盘退变性疾病引起的腰腿痛。外科医生使用植骨材料将椎体融合在一起以稳定脊柱。
The isthmus, or pars interarticularis, is a small, thin segment of bone that connects the facet joints at the back of the spine.
峡部或称椎弓峡部，是脊柱背侧连接上下关节突之间的一段小而细的骨段。
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