Objective:To compare the effects on periodontal health of the abutment between concealed denture(flexible denture)and two traditional removable partial dentrue(RPD)-one with flexible retainers,the other with wire clasps and casting clasps,and observe whether the concealed denture can damage the abutment teeth.Methods:255 cases of the patients losing one of the first molar were collected,and divided into three groups,using one of three kinds of RPD and then repaired with the concealed denture,traditional plastic denture and casting frame denture respectively to one group.The indices of periodontal health of the abutment teeth were examined after 1 month and 1year.Results:Among three groups,the plaque index(PLI),gingival index(GI),probing depth(PD),teeth mobility and alveolar bone height of the abutment teeth were similar.Conclusion:Compared with two traditional RPD designs,there are no negative effects on periodontal health of the abutment teeth with the concealed denture long-term.

Objective: To evaluate the clinical effection of inlay-crown on the massive destruction in deciduous molar.Methods: Forty-nine teeth with massive dental crown defects from thirty-four children were given casting alloy or PFM inlay-crown restorative treatment.The patients were followed up for 1 to 3 years.Results: Of these 49 teeth,only one was broken.Restoration contours of the rest were tight.Exfoliation and secondary caries were not found.Conclusion: This method may not only repair and preserve the decayed tooth,but also maintain the completion of the primary dentition and improve the masticatory function.

The article sums up the experience of applying multimedia technology to Prosthodontics teaching and analyzes its necessities and problems to improve the teaching quality.

To explore the feasibility and new teaching mode on bilingual teaching in stomatoloy,we carried out bilingual teaching in prothodontics among the four-year Bachelor degree students.Questionnaires about the understanding and evaluation of bilingual teaching were answered after the class.The study provided an important evidence for improving the quality of bilingual teaching in Stomatoloy.