The Relationship Between Center-edge Angle And Onset Age Of Pain In Hip Dysplasia Secondary Osteoarthritis

Objective: Morphological abnormalities and the incidence of hip osteoarthritis has a close relationship in which hip dysplasia is an important risk factor for OA. Generally it believes that if the joint dysplasia fails or without good correction, the prevalence of secondary OA will be significantly higher than other risk factors. Some scholars pointed out that onset time of hip dysplasia secondary OA younger. And we in the actual clinical work also noticed this, and we hope the study confirms this phenomenon and try to find the relationship between center edge angle and onset age of pain in patient poor who undergo hip dysplasia with the secondary osteoarthritis.Methods: The patient select from the second Hospital of Jilin University Joint Surgery Department,and a total of 87 cases were diagnosised of hip dysplasia secondary to OA. Measuring the lateral CEA from hip anteroposterior X-ray, statistics the onset age of patient’s pain.Using statistical method analysis:mean onset age of patient’s pain, the relationship between center edge angle and onset age of pain, eligiblepatients will be divided into two groups: A group CEA <10 °, B group CEA> 10 °, compare the two groups of patients whether there is a difference of age with pain, If all patients with bilateral involvement, analyze whether CEA small side was onset younger.Result: 1.We did a survey of hip dysplasia in situ secondary OA of the hip in 95 hips, 85 have hip pain, accounting for 89.47%, the mean age of pain is 46.02 ± 17.37 years. 2. Correlation analysis these 85 hip CEA and corresponding pain of age then showed, r = 0.13,p = 0.23,the difference was not statistically significant. 3. The mean age of pain between AB two groups showed that, A group(n = 50) mean pain age is 43.24 ± 12.20; group B(n = 35) mean pain age is 50.66 ± 14.42. P = 0.01, the difference was statistically significant. 4. Use the left hip as a standard In patients with bilateral disease, 21 people CEA smaller than the right,and 26 people CEA larger than the right side, 22 people left side pain symptoms first appear,and 25 people pain on the left after, with four tables from x2 test, p = 0.001, the difference was statistically significant.Conclusion:1. Dysplasia of the hip joint CEA and secondary OA pain Age is not relevant, hip CEA can not predict as indicators.2. The patients’ onset age of pain in CEA <10 ° is younger than patients CEA> 10 °, patients with CEA <10 ° compared with > 10 ° will be the early get pain symptoms. 3. In patients with secondary OA of both sides, CEA smaller side will be first appear symptoms of pain.