Objective To investigate the food intake of one meal of the hotel customers and evaluate it rationality ,then provide dietary suggestions .Methods Six hundreds hotel customers were investigated in 2 four‐star hotel and 2 five‐star hotel of Nanjing , who were selected with a stratified sampling method .Their 5 days diet were investigated and then the dietary intake ,the percentage of energy from protein ,fat and carbohydrate and the percentage of protein resource were calculated based on the food composition table .Results It was shown that the daily energy intake of one meal was appropriate among the surveyed hotel customers ,and the energy proportion from 3 major nutrients were not reasonable ,and the energy proportion from fat were higher than other 2 major nutrients ;the proportion from the source of good proteins was reasonable ,but the intake of protein was too much;the customers fell short on their daily serving of grains ,eggs ,beans and milk products and the intake of cooking oil and salt was excessive in diets . Their intake of fat ,protein ,retinol equivalent ,niacin ,vitamin E ,sodium and iron were too much .Instead ,they ate less ascorbic acid;only the intake of energy ,riboflavin and thiamine were appropriate .Conclusion The one meal dietary structure of hotel customers is not appropriate ,while nutrition collocation is not reasonable .It is necessary to promote nutrition and health education and some intervention measures must be taken .

Objective: To evaluate the impact of ultra-high-molecular-weight polyethylene (UHMWPE)-Ribbond fibers, when combined with different restorative materials, on fracture resistance and marginal adaptation of isolated primary molar defects, to provide a reference for clinical practice. Methods: This study was approved by the Ethics Review Committee. A total of 72 extracted primary molars with complete crowns were collected, and 66 primary molars were randomly assigned as experimental groups for the fracture resistance and microleakage tests. The molars were divided into six groups (n = 11) based on the type of restorative materials and the application of Ribbond fibers: Group A1, 3M Filtek Z250 + Ribbond; Group A2, 3M Filtek Z250; Group B1, Beautifil II LS + Ribbond; Group B2, Beautifil II LS; Group C1, 3M Filtek Bulk Fill + Ribbond; and Group C2, 3M Filtek Bulk Fill. Groups A1, B1 and C1 received the fiber-reinforcing technique, whereas Groups A2, B2 and C2 received the direct restorative technique; the remainings were in Group D (blank control group), which did not receive treatment for the fracture resistance test. The fracture resistance test was divided into six experimental groups and one blank control group (n = 6). Primary molar teeth in each experimental group were prepared with Class II cavities and filled. The fracture load of all samples was detected, and the fracture mode was analyzed after thermal cycling. The microleakage test was divided into six experimental groups, with five in each group. Class I cavities with a diameter of 3 mm and depth of 2.5 mm were prepared within the mesial and distal marginal ridges on the occlusal surface and filled for primary molars in each group. Marginal microleakage was assessed after thermal cycling. Results: The fracture resistance test results showed that the fracture resistance in groups that received the fiber-reinforcing technique was greater than that in groups that received the direct restorative technique: Group A1>Group A2, Group B1>Group B2, Group C1>Group C2 (P<0.05). The application of Ribbond fibers increased fracture resistance to all tested restorative materials by 37.08% to 39.34%. The proportion of tooth frac-ture decreased significantly in groups A1, C1 compared with A2, C2, with a significant increase in the occurrence rate of “Repairable” (P<0.05). The fracture resistance in Group A1 was significantly greater than that in Group B1 and Group C1 (P<0.05). The marginal microleakage test results showed that the microleakage depth in groups that received the fiber-reinforcing technique was smaller than that in groups that received the direct restorative technique: Group A1Conclusion The application of Ribbond fibers combined with various restorative materials could enhance fracture resistance and diminish the microleakage depth to improve marginal adaptation.