BACKGROUND:Compared with the cone stem,short stem holds good matching with femoral canal,and remarkably reduces the risk of prosthesis loosening.OBJECTIVE:To further investigate the clinical efficacy of Accolade Ⅱ stem for Crowe type Ⅰ developmental dysplasia of the hip.METHODS:Clinical data of 16 patients with Crowe type Ⅰ developmental dysplasia of the hip undergoing total hip arthroplasty using Accolade Ⅱ stem were collected,the length of both lower limbs before and after surgery was compared,and the Visual Analogue Scale,functional recovery of the hip and general conditions were observed at 12 weeks postoperatively.RESULTS AND CONCLUSION:(1) The change in length of both lower limbs before and after surgery had significant difference (P ＜ 0.05),and 10 patients (62％) with the same length of both lower limbs before surgery,and 15 cases (94％) after surgery.(2) The postoperative acetablar abducent angle was 41°-54° (average 46.9°).(3) The Visual Analogue Scale and Harris hip scores after surgery were significantly improved compared with baseline (P ＜ 0.05).(4) The intraoperative blood loss was 147 mL on average,the mean operation time was 72 minutes,and the hospitalization time was 7.2 days.(5) All patients recovered well and no complications occurred at 3 months postoperatively.(6) To conclude,Accolade Ⅱ stem is safe and reliable for Crowe type Ⅰ developmental dysplasia of the hip,and exhibits good functional recovery of the hip.

Objective:To explore the mediating effect and masking effect of creative self-efficacy on emotion regulation and procrastination behavior of nursing undergraduates, to provide a reference for the cultivation of creative self-efficacy of nursing undergraduates and improvement of their competence in innovative tasks.Methods:From May to June 2018, a total of 550 nursing undergraduates from a medical university in Hefei were surveyed by cluster sampling method, using general data questionnaire, Emotion Regulation Questionnaire, Creative Self-efficacy Scale for College Students and General Procrastination Scale. A total of 550 questionnaires were issued in this study and 509 valid questionnaires were finally recovered, with an effective recovery rate of 92.55%.Results:The procrastination behavior of nursing undergraduates was negatively correlated with emotion regulation and cognitive reappraisal ( P<0.01) , and positively correlated with expression suppression ( P<0.01) . Procrastination behavior was negatively correlated with creative efficacy and its dimensions ( P<0.01) . Emotion regulation and its dimensions were positively correlated with creative efficacy ( P<0.01) . The creative efficacy of nursing undergraduates played a part of the mediating role between cognitive reappraisal and procrastination behavior, and the indirect effect of creative self-efficacy between expression suppression and procrastination behavior was shown as a masking effect. Conclusions:Cognitive reappraisal or expression suppression can indirectly affect procrastination behavior through creative self-efficacy. Nursing educators can enhance students' innovation efficacy by increasing the self-recognition of nursing students and opening innovative training courses online or offline.

Objective:To explore the mediating effect of positive psychological capital on achievement motivation and procrastination behavior of nursing undergraduates and the moderating effect of positive perfectionism on mediation.Methods:Using the cluster sampling method, a total of 550 nursing undergraduates from the 1st to 4th grades of School of Nursing of a medical university were selected as research objects from May to June 2018. General information questionnaire, Achievement Motivation Scale (AMS) , Positive Psychological Capital Questionnaire (PPQ) , positive perfectionism dimension of Frost Multidimensional Perfectionism Scale and General Procrastination Scale (GPS) were used for investigation. PROCESS software was used for moderated mediation effect analysis.Results:A total of 550 questionnaires were issued and 509 valid questionnaires were finally recovered, with an effective recovery rate of 92.55%. The GPS score of 509 nursing undergraduates was (55.08±8.18) , AMS score was (-0.03±6.02) , PPQ score was (4.35±0.70) and score of positive perfectionism dimension was (17.26±4.69) . Achievement motivation, positive psychological capital and positive perfectionism were all negatively correlated with procrastination behavior ( r=-0.245, -0.415, -0.357; P<0.01) . Positive psychological capital played a partial mediating role between achievement motivation and procrastination behavior, and the mediating effect accounted for 42.31% of the total effect. Positive perfectionism had a moderating effect on the second half of the mediating pathway of positive psychological capital ( P< 0.05) . Conclusions:The procrastination behavior of nursing undergraduates is at the middle level. Achievement motivation can influence procrastination behavior through positive psychological capital and positive perfectionism regulates the relationship between positive psychological capital and procrastination behavior.