[Relationship between fracture risk evaluated by FRAX tool and spinal curvature].

OBJECTIVE: To investigate the relationship between the risk of osteoporotic fracture in old people and the spinal morphology. METHODS: From June 2010 to January 2011, 107 old people's BMD of femoral neck were measured by Dual energy X-ray. A questionnaire survey on fracture risk factors of the 107 aged and data collection were adopted. Among the aged,41 were male and 66 were female,ranging in age from 48 to 82 years old,with an averaged of (67 +/- 6) years old. The fracture risk assessment tools (FRAX) recommended by WHO were adopted. A risk assessment on osteoporotic fracture in old people was done,followed with the calculation of the probability of the hip fracture and the main bone fractures (spine,hip,forearm or shoulder fractures) in ten years. The angles of spine vertebra, spine curvature in the upright positions of the old people were measured by using Spinalmouse. The correlation analysis along with curve fitting analysis between the probability of fracture risk and included angles of spine vertebra, spine curvature were done. RESULTS: The probability of osteoporotic fracture had a positive relation with thoracic vertebra T7 and T8, thoracic spine curvature,lumbar curvature and incline angle in upright position (P < 0.05). CONCLUSION: The old people's morphological characteristics of spine have the ability to reflect the risk level o osteoporotic fracture.

A modified sagittal spine postural classification and its relationship to deformities and spinal mobility in a chinese osteoporotic population.

BACKGROUND: Abnormal posture and spinal mobility have been demonstrated to cause functional impairment in the quality of life, especially in the postmenopausal osteoporotic population. Most of the literature studies focus on either thoracic kyphosis or lumbar lordosis, but not on the change of the entire spinal alignment. Very few articles reported the spinal alignment of Chinese people. The purpose of this study was threefold: to classify the spinal curvature based on the classification system defined by Satoh consisting of the entire spine alignment; to identify the change of trunk mobility; and to relate spinal curvature to balance disorder in a Chinese population. METHODOLOGY/PRINCIPAL FINDINGS: 450 osteoporotic volunteers were recruited for this study. Spinal range of motion and global curvature were evaluated noninvasively using the Spinal-Mouse® system and sagittal postural deformities were characterized. RESULTS: We found a new spine postural alignment consisting of an increased thoracic kyphosis and decreased lumbar lordosis which we classified as our modified round back. We did not find any of Satoh's type 5 classification in our population. Type 2 sagittal alignment was the most common spinal deformity (38.44%). In standing, thoracic kyphosis angles in types 2 (58.34°) and 3 (58.03°) were the largest and lumbar lordosis angles in types 4 (13.95°) and 5 (-8.61°) were the smallest. The range of flexion (ROF) and range of flexion-extension (ROFE) of types 2 and 3 were usually greater than types 4 and 5, with type 1 being the largest. CONCLUSIONS/SIGNIFICANCE: The present study classified and compared for the first time the mobility, curvature and balance in a Chinese population based on the entire spine alignment and found types 4 and 5 to present the worst balance and mobility. This study included a new spine postural alignment classification that should be considered in future population studies.