شیوع Caries Free در دانش آموزان 12 و 15 ساله شهر رفسنجان در سال 1377

  Prevalance of Caries Free in 12 and 15 Years-old Students of Rafsanjan City in 1998.     M . Sadghi   Assistant Professor of Restorative Dentistry. Dental School , Rafsanjan University of Medical Sciences and Health Services , Rafsanjan , Iran .   Background: The aim of this study was to determine the prevalance of Caries Free in 12 and 15 year-old students of Rafsanjan city in 1998 .   Material and Methods: 380 students {266 students were 12 year-old (138 boys and 128 grils) and 114 students were 15 year-old ( 56 boys and 58 grils ) } were selected by stratified cluster sampling.   Students were examined by using sickle explorers and dental mirrors with the method of WHO index. .   Results : Results show that the prevalance of caries free in 12 year-old students was 38.2 percent (41.3 percent boys and 35.1 percent grils ) and in 15 year-old students was 20.6 percent (17.8 percent boys and 22.4 percent grils ).   These percents of caries free are below the aims of WHO in the year 2000 and must be corrected.   Conclusion: On the basis of the aims of WHO in the year 2000 , this percent of caries free is low and must be incresed .     Key Words : Caries Free, Tooth Caries, Rafsanjan, Student