Abstract: Objective To investigate anxiety state and its correlativity with personality factors in partially edentulous patients before implantation surgery.Methods Eighty partially edentulous patients (40 men and 40 women),aged between 24 and 74 (with the average age of (45.0 ±12.9)),were randomly selected for this clinical research.The patients were requested to answer three reliable and valid questionnaires :State Trait Anxiety Inventory(STAI),Modified Dental Anxiety Scale (MDAS) and Eysenck Personality QuestionnaireRevised Short Scale for Chinese (EPQRSC) before treatment.Preoperative anxiety states in patients of different genders and different age groups were analyzed.The correlation between personality factors,Statetrait anxiety,and dental anxiety level was also discussed.Results Compared with male patients,female patients showed higher level of anxiety in the SAI and MDAS score evaluation(P＜0.05).SAI and MDAS scores showed statistically significant difference among different age groups (P＜0.05).There was no significant difference in P,E,N scores of different genders in patients (P＞0.05).P score had significantly positive relationship with MDAS score(P＜0.05).E score was negatively correlated with STAI and MDAS scores（P＜0.05）,while N score was positively correlated with them（P＜0.01).Conclusions The partially edentulous patients of different genders and ages show different anxiety states before implantation surgery.There is certain relevance between personality traits and preoperative anxiety.

Key words: partial edentulism, implant prosthesis, Eysenck Personality Questionnaire, State Trait Anxiety Inventory, dental anxiety