The author conducted a dental survey of college girl students and compared with that of college students 20 years and 10 years ago which based on the same criteria. The items of this survey included the prevalence of dental caries, DMFT and the kinds of restored materials. College girl students 2,294 were examined in May 1988, with the recommended criteria and method of W.H.O.. Among them, the data of 2,243 were analyzed and compared with the data of 1968 and 1978. The following results were obtained : 1. The average number of present teeth was $28.86{pm}1.65$, which does not show much difference when compared to $29.00{pm}1.94$ of 1968 and $28.97{pm}1.64$ of 1978. 2. The prevalence of dental caries was 86.22%, which increased in comparison to 83.25% of 1968 and 84.92% of 1978. 3. DMF index was 19.98, which considerably increased in comparison to 14.56 of 1968 and 15.51 of 1978. 4. The number of DMFT was $5.75{pm}5.04$ per student. Compared to $4.23{pm}3.88$ of 1968 and $4.49{pm}3.69$ of 1978, there is a considerable increase. I) The average number of decayed(D) teeth was $1.14{pm}1.63$, which decreased from $1.16{pm}1.57$ of 1968 and $2.09{pm}2.16$ of 1978. II) The average number of missing(M) teeth was $0.23{pm}0.73$, which also decreased from $0.69{pm}1.11$ of 1968 and $0.32{pm}0.79$ of 1978. III) The average number of filled(F) teeth was $4.39{pm}4.91$, which increased from $2.38{pm}3.33$ of 1968 and $2.09{pm}3.17$ of 1978. 5. According to the analysis of filling material, filling baby including amalgam, gold inlay, resin, silicate cement and paladium inlay was 90.5%, which increased in comparison to 72.8% of 1968 and 83.6% of 1978. Among them, amalgam occupied 62.93%, which showed the most increase. On the other hand, crown and bridge was 6.5%, 3.0%, respectively, which showed continuous decrease from 12.1%, 15.1% of 1968 and 8.7%, 7.7% of 1978. Therefore, the prosthodontic treatment reduced due to the decrease of tooth extraction. In contrast, there is continuous increase of conservative treatment which maintaining natural tooth.