27 Table 19 Subjects With Positive Bentonite Flocculation Test Subject No. Age Sex BFT titer 841 886 41 49 F M 1/256 1/64 953 42 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 enamelin deciduousteeth were not an unusualfinding. Aduits Only about 10% of the Rongelap people practiced good oral hygiene. Peridontal disorders may 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 of cervical ringlets accompanied by marginal gingivitis, and very little supragingival deposition was observed. In subjects >35 years of age, loss of alveolar bone was quite apparent, and supragingival calculus was more prevalent than subgingival. Only 2% of