Chawapon Chaimuang

Bio: Chawapon Chaimuang is an academic researcher. The author has contributed to research in topics: Femoral neck & Osteoporosis. The author has an hindex of 1, co-authored 1 publications receiving 3 citations.

Correlation of Proximal Femoral Bone Geometry from Plain Radiographs and Dual Energy X-Ray Absorptiometry in Elderly Patients

Abstract: Background : Fracture prevention in osteoporotic patients is the primary treatment goal in assessing bone mineral density, identification of fracture risk, and determination of who should be treated. The literature shows that parameters of proximal femoral bone geometry such as hip axis length, femoral neck shaft angle (FNA), femoral neck width (FNW) and femoral neck cortical thickness (FNCT) can predict the risk of hip fracture. Those parameters are presented automatically with dual energy X-ray absorptiometry (DXA) scans, which are available in well-equipped hospitals. Objective : To determine the correlation between proximal femoral bone geometry and the parameters from DXA scans and those from plain radiographs. Material and Method : Forty-eight patients with no previous hip fractures or history of secondary osteoporosis underwent both a DXA scan of the hip area and a plain hip radiograph done in the same position, 25 degrees internal rotation. Bone geometries from both groups were measured to determine the correlation using Pearson correlation coefficient. Results : Correlation between the parameters HAL, FNA, FNW and FNCT from the DXA scans and from the measurement of the plain radiograph was significant (p<0.01) and the level of correlation was moderate to high. The FNCT had least mean difference (0.04). In addition, the parameter FNCT, less than 0.29 mm in both DXA scans and plain radiographs, showed a significant correlation with osteoporosis (T-score <-2.5). Conclusion : The bone geometry parameters from either DXA scans or plain radiographs may be used to predict osteoporotic hip fracture with a moderate to high correlation. Plain radiographs are very helpful when DXA scan results are not available. The FNCT parameter has a strong correlation with osteoporosis. Keywords : Bone geometry, Hip fracture, DXA, Plain X-ray, Osteoporosis, BMD

Digital Photographic Measurements of the Proximal Femoral Anatomy

Abstract: Objective: This study evaluated the morphology of the proximal femur in the Thai population, especially the femoral head-neck relationship and the femoral neck-shaft relationship, using digital photographs. Methods: The morphology of each proximal femur was evaluated via the standard anteroposterior and cephalocaudal views of digital photographs. The femoral head-neck junction morphology was evaluated for translation, rotation, and concavity. The femoral neck-shaft anatomy was measured with the neck-shaft angle and the neck version. Results: Fifty-nine Thai femora with an average age of 45.4 years were evaluated. For the femoral head-neck translation, the average superior/inferior offset ratio was 1.01, and the average anterior/posterior offset ratio was 0.97. For the femoral head-neck rotation, the average anteroposterior and lateral physeal angles were 77.5° and 81.9°, respectively. Regarding the head-neck junction concavity, the average gamma, delta, alpha, and beta angles were 45.6°, 44.5°, 45.5°, and 36.2°, respectively. The average femoral neck-shaft angle was 129.5°, and the average femoral neck version was 5.7° of anteversion. Conclusion: Thai femora had their heads located almost at the center of the femoral neck, and they were rotated in abduction and anteversion relative to the neck axis. The femoral head-neck junctions showed less concavity anteriorly and superiorly.

Study of relation between Neck Shaft Angle (NSA) and mineral density of the femoral head among old post menopausal women in east part of mazandaran province

Abstract: Background: Diversity in Proximal Femur Geometric Parameters (PFGPs) will be led to frequency changes in hip fractures. The purpose of the present study is to investigate of the relation between Bone Mineral Density (BMD) in proximal femur with Neck Shaft Angle (NSA) in both of osteoporotic and normal groups among old postmenopausal women in eastern part of Mazandaran province as a appropriate indicator to predict hip fractures occurance. Materials and Methods: Among 5103 postmenopausal women reffered to bone densitometry center, for 221 postmenopausal women who had inclusion criteria to this study, simultaneously by using densitometry system and completing a standard questionnaire, history of disease and demographic information including body mass index (BMI) were recorded for each patient. Obtained information from densitometers was analyzed by the statistical software SPSS version 16 and Pearson correlation coefficient test was used. Results: Geometric parameters of 221 post-menopausal women aged 50 to 60 were analyzed. The mean of neck shaft angle (NSA) were recorded for osteoporotic group 121.55 and for control group 121.44. Pearson correlation coefficient t-test results showed a negative significant correlation between mineral density in the femoral neck in osteoporotic group and NSA (P<0.05). Considering the effect of weight and BMI in strength and bone density in the femoral neck, the mean of BMI and weight in osteoporotic group was lower compared to control group. Conclusion: according to the findings of this study, NSA is effective in predicting of the proximal femur BMD in osteoporotic group.