27 Table 19 Subjects With Positive Bentonite Flocculation Test Subject No. Age 841 41 953 42 886 49 Sex BFTtiter F 1/256 M 1/64 M 1/64 X-ray evidence of arthritis None Nottested None Clinical findings Neg. in 1957, ’58, and ’59. Mild osteoarthritis in 1959. Nojoint findings; bronchial asthma; 2+ prostatic hypertrophy. Figure 12. Roentgenograph of hands showing congenital hypoplasia of the middle phalanx,5th finger. the Majuro group, although the general impression was that their standardsof oral hygiene were lower. In both the exposed and unexposed Rongelap children, areas of hypoplastic enamel in deciduous teeth were not an unusualfinding, Adults | Only about!0% of the Rongelap people practiced good orai Mgiene. Peridontal disorders may mom N* JU ieUdD =, * have beenslightly higher in the exposed group,although there was nosignificant difference in the incidence of caries. In young adults, subgingival calculus was usually present in the form ofcervical ringlets accompanied by marginal gingivitis, and very little supragingival deposition was observed. In subjects >35 yearsof age, loss of alveolar bone was quite apparent, and supragingival calculus was more prevalent than subgingival. Only 2% of