ABSTRACT
Objective To investigate the effects of fresh lumbar osteoporotic vertebral compression fracture (OVCF) on spinopelvic sagittal parameters and distribution of Roussouly types.Methods One hundred and eight patients with one-level fresh lumbar OVCF and 110 patients with simple osteoporosis (OP) were diagnosed and treated at Department of Orthopedic Surgery,Shougang Hospital from January 2016 to August 2017.The basic clinical data of all the patients were documented and their lumber spines were classified by Roussouly types.The 2 groups were compared in terms of spinopelvic sagittal parameters such as pelvic incidence (PI),pelvic tilt (PT),sacral slope (SS),and lumbar lordosis (LL) and Roussouly types.The correlation between Roussouly types and fracture segments was observed in OVCF group.Results There was no significant different in PI between OVCF and OP groups (50.35° ± 11.00° versus 51.96° ± 11.73°) (P ＞ 0.05).PT in OVCF group (18.79°± 9.51°) was significantly larger than that (16.19°± 9.03°) in OP group while SS (31.56° ± 7.88°) and LL (40.22°± 12.29°) in the former significantly smaller than those in the latter (35.77° ± 8.82° and 47.89° ± 13.20°,respectively) (P ＜ 0.05).Roussouly types Ⅰ,Ⅱ,Ⅲ and Ⅳ in OVCF group were 35,40,28 and 5 cases,respectively,with types Ⅰ and Ⅱ accounting for 69.5％;Roussouly types Ⅰ,Ⅱ,Ⅲ and Ⅳ in OP group were 17,30,49 and 14 cases,respectively,with type Ⅲ being predominant (44.5％).There was a significant difference between the 2 groups in distribution of Roussouly types (P ＜03.05).In OVCF group,fractures of L1 and L2 vertebrae accounted for 82.4％.There was a significant correlation between fracture segments and lumbar Roussouly types (P =0.034).Conclusions Patients with fresh lumbar OVCF tend to have a forward gravity and sagittal disequilibrium,leading to posterior pelvic rotation,increased PT,decreased SS,and downward shift of the apex of the lumbar curve.Their Roussouly classification is mainly type Ⅰ or type Ⅱ.
ABSTRACT
STUDY DESIGN: A prospective imaging study. PURPOSE: To characterize the distribution of the global sagittal postural patterns in asymptomatic Chinese adults using Roussouly classification. OVERVIEW OF LITERATURE: The norms of sagittal parameters in asymptomatic Chinese population have been previously described, but no report described their global sagittal postural patterns as characterized by Roussouly classification. METHODS: A cohort of 272 asymptomatic Chinese adults was recruited. Data was assimilated by reviewing the films for each subject. Sagittal parameters were measured and sagittal postural patterns were then determined according to Roussouly classification. The pattern distributions were compared across genders within the study cohort. We also compared the data across different ethnicities from our study and a previous study to further characterize Chinese sagittal postures. RESULTS: The cohort included 161 males and 111 females, with mean age of 23.2±4.4 years. The average descriptive results were as below: pelvic incidence (PI) 46.4°±9.6°, thoracic kyphosis (TK) 24.2°±9.0°, lumbar lordosis (LL) 50.6°±10.6°, sacral slope (SS) 37.2°±7.6°, pelvic tilt (PT) 9.4°±6.8°, spinosacral angle (SSA) 131.1°±7.5° and sagittal vertical axis (SVA) 17.24±32.36 mm. Despite a significant difference between two genders in LL, PI, SSA, and SVA, no difference was found in the distribution of Roussouly types among them. 47.8% of our cohort belonged to Roussouly type 3, while type 1, 2 and 4 comprised 23.2%, 14.0% and 15.1% of the subjects, respectively. Roussouly classification was capable of categorizing sagittal parameters except for the PT. This study also found that 4.4% of the recruited subjects belonged to the C7-anterior subgroup. CONCLUSIONS: From a characterization of the sagittal postural patterns of asymptomatic Chinese adults using Roussouly classification, the distribution was similar between Chinese males and females; however, from a cross-study comparison, it was different between asymptomatic Chinese and Caucasian adults, with a higher proportion of Roussouly type 3 in Chinese adults.