Swanepoel Pieter F, Fysh Robert
The Nose Clinic, Pretoria, South Africa.
Arch Facial Plast Surg. 2007 Jul-Aug;9(4):285-9. doi: 10.1001/archfaci.9.4.285.
Preshaped laminated dorsal beam grafts, cut and shaped, from lyophilized rib cartilage eliminate postoperative complications in the correction of saddle depression procedures; lyophilized rib cartilage does not undergo irradiation. Rhinoplasty surgeons traditionally use monounit rib cartilage to correct saddle depressions. During the 3- to 6- month postoperative recovery period, monounit grafts tend to twist and bend, often undermining the shape of the nose. Secondary or revision surgery entails removal of the monounit cartilage. Grafting material used in laminated form is more resilient and flexible than a single unit of similar material. Two-millimeter-thick rib cartilage strips counteract the distorting tendencies of monounit cartilage most effectively. After estimating the dimensions of the required lamination with soft-solid silicone sizers, rib cartilage strips are shaped and sutured into a lamination and then inserted under the skin-soft tissue envelope into the dorsal depression. Surgery is concluded in the normal manner by closing the transcolumella-incision with 6-0 fast absorbing plain cat gut sutures. Results over 3 years (117 dorsal beam procedures from 2003-2005) documented with medical case history follow-ups and postoperative imagery show that the laminations do not bend or revert to the original shape of the rib. Results 4 years after the introduction of the technique suggest that laminations counter the inherent postoperative distortion tendencies of monounit rib cartilage.
预成型层压背侧梁移植物,由冻干肋软骨切割并塑形而成,可消除鞍鼻凹陷矫正手术中的术后并发症;冻干肋软骨未经过辐照。传统上,鼻整形外科医生使用单块肋软骨来矫正鞍鼻凹陷。在术后3至6个月的恢复期内,单块移植物容易扭曲和弯曲,常常破坏鼻子的形状。二次手术或修复手术需要移除单块软骨。以层压形式使用的移植材料比单块类似材料更具弹性和柔韧性。两毫米厚的肋软骨条最有效地抵消了单块软骨的扭曲倾向。用软质固体硅胶尺寸测量器估计所需层压的尺寸后,将肋软骨条塑形并缝合形成层压结构,然后将其置于皮下软组织包膜下,植入鼻背凹陷处。手术以常规方式结束,用6-0快速吸收的普通肠线缝合经鼻小柱切口。通过医疗病例史随访和术后影像记录的3年(2003年至2005年的117例背侧梁手术)结果表明,层压结构不会弯曲或恢复到肋软骨的原始形状。该技术引入4年后的结果表明,层压结构可对抗单块肋软骨固有的术后变形倾向。