Objective To evaluate two methods measuring alveolar bone loss by micro computed tomography (micro-CT)based on periodontitis model in mice.Methods The silk ligatures were tied around the right maxillary second molars of mice to induce periodontitis model.The right half maxillaries of mice model were harvested for micro-CT analysis.Three dentists were recruited for the measurement with two different methods:Modified tomography (T) method and reconstruction (R) method.Accuracy and consistency of each method were estimated by standard deviation (SD).Results The SDs of R method managed by the same operator (measurement for 3 times) or different operators (3 operators) were 34.87μm and 35.67 μm respectively,while that of T method was 7.82 μm and 14.24 μm respectively.The SDs of T method were significantly lower than those of R method (both P＜0.05).Conclusion T method is more accurate and consistent than R method for evaluating alveolar bone loss in mice periodontitis model.

Objective To explore the results of non-compliance of fluid intake in maintence hemodialysis patients.Methods The qualitative phenomenological research method was adopted in this study.Self-structured in-depth interviews were conducted with 13 maintenance hemodialysis patients.Data were analyzed by content analysis.Result Four themes were extracted including allotrigeusia,have a smattering of fluid intake knowledge,self-condemned and guilty,muddling along.Conclusions Fuild restriction is the most difficuilt prescribed treatment schedule among maintence hemodialysis patients.Nurses should pay attention to those people and provide multilevel,continual,individual and comprehensive measures.