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