Objective To improve and innovate the dispensing equipment in oncology.Methods Plexiglass plate was used in the counter in order to give an isolate space for preparation of chemotherapy drugs.Through the ventilation hole,the air polluted by chemotherapy drugs was sent out of door.The operator put on special protective gloves before preparation of chemotherapy drugs.Results There was a decrease of dispensing errors and confusion,when the counter was used to separate the conventional dosage from chemotherapy dosage.The counter effectively prevented the skin and respiratory tract damage to the operator during the preparation of chemotherapy drugs.Conclusion It is practical,cheap,easily operated and produced,which is worth promoting.

Objective: To study the relationship between Angle Class II division 2 malocclusion and congenital anomalies of dentition, Methods: 100 untreated patients (aged 12～42 years old) with Class II division 2 malocclusion were investigated by history,general examination,radiograph and tooth model. The data of congenital tooth anomalies were analysed.Results: Congenital tooth anomaly was found in 50 of the patients. Upper lateral incisor enamel hypoplasia was found in 7 patients, small size of maxillary lateral incisor in 28, canine impaction in 4, missing of lower incisor in 9, transposition in 2 and anterior tooth Bolton ratio discrepancies in 30 of the patients. Conclusion: Angle Class II division 2 malocclusion is closely related to congenital tooth anomalies. The main factors of anterior tooth Bolton discrepancies may be the small size of maxillary lateral incisor and absence of lower incisor.