Luk K D, Cheung K M, Lu D S, Leong J C
Department of Orthopedic Surgery, University of Hong Kong, Duchess of Kent Children's Hospital, Sandy Bay, Hong Kong, China.
Spine (Phila Pa 1976). 1998 Nov 1;23(21):2303-7. doi: 10.1097/00007632-199811010-00011.
A prospective study on adolescent idiopathic scoliosis to assess a new method of describing frontal plane correction.
To assess the difference between using the correction rate and using the new fulcrum bending correction index when describing scoliosis correction.
A description of the outcome of scoliosis surgery based on the correction rate does not take into account the curve's flexibility.
The fulcrum bending correction index is calculated by dividing the correction rate by the fulcrum flexibility (based on the fulcrum bending radiograph) and is expressed as a percentage. The fulcrum bending correction index was compared with the correction rate in 35 patients with adolescent idiopathic scoliosis undergoing surgical correction. These patients were divided into a stiff and a flexible group based on a fulcrum flexibility of 50% to show the advantage of the fulcrum bending correction index over the correction rate.
The difference in correction rate between the flexible (66%) and the stiff group (45%) was significant (P < 0.05). The difference in the fulcrum bending correction index between the flexible (96%) and the stiff group (107%) was not significant (P = 0.2).
The fulcrum bending correction index takes into account the curve flexibility and is therefore better than the correction rate for comparing curve correction and use of instrumentation systems between different series of patients. A fulcrum bending correction index of close to 100% suggests that the instrumentation has taken up all the flexibility revealed by the fulcrum bending radiograph. It is recommended that the fulcrum bending correction index be used in the future as part of the postoperative assessment of frontal plane correction in cases of thoracic scoliosis.
一项关于青少年特发性脊柱侧凸的前瞻性研究，以评估一种描述额状面矫正的新方法。
评估在描述脊柱侧凸矫正时使用矫正率和使用新的支点弯曲矫正指数之间的差异。
基于矫正率对脊柱侧凸手术结果的描述未考虑曲线的柔韧性。
支点弯曲矫正指数通过将矫正率除以支点柔韧性（基于支点弯曲X线片）计算得出，并以百分比表示。将35例接受手术矫正的青少年特发性脊柱侧凸患者的支点弯曲矫正指数与矫正率进行比较。根据支点柔韧性50%将这些患者分为僵硬组和柔韧组，以显示支点弯曲矫正指数相对于矫正率的优势。
柔韧组（66%）和僵硬组（45%）的矫正率差异显著（P < 0.05）。柔韧组（96%）和僵硬组（107%）的支点弯曲矫正指数差异不显著（P = 0.2）。
支点弯曲矫正指数考虑了曲线柔韧性，因此在比较不同系列患者之间的曲线矫正和器械系统使用方面优于矫正率。接近100%的支点弯曲矫正指数表明器械已占据支点弯曲X线片显示的所有柔韧性。建议将来在胸椎侧凸病例的额状面矫正术后评估中使用支点弯曲矫正指数。
