GOAL: To understand the characteristics of forearm and crus X-rays of residents from areas with varying concentrations of fluoride in their drinking water, providing evidence for diagnosis of osteofluorosis.
METHOD: Using quantificational epidemiological methods, a total of 15 villages from Qianan and Nonan Counties of Jilin Province were selected as the subjects of the investigations; these villages all had at least 50 years of history, complete records of drinking water fluoride levels for that period with stable levels, no industrial or coal-burning fluoride pollution, no other sources of fluoride, and no low-fluoride drinking water alternatives. Fluoride concentration was determined and the areas were divided into 11 fluoride concentration levels (from 0.5 to 7.0 mg/L), and then from each range subjects ages 16-60 that had lived in the area for at least 10 years were selected. We considered 5 age ranges with cutoffs at 21, 31, 41, and 51, and a random selection of 10 to 15 subjects was made from each age range and the forearm and crus of was examined by x-ray. The 0.5-1.0 mg/L group were regarded as the low fluoride (control) group, and the 1.5-7.0 mg/L range was considered the high fluoride group; the two groups were compared with respect to various x-ray signs and disease detection rates.
RESULT: The x-ray examination showed three kinds of changes: osteofluorosis, articular degeneration, and osteoporosis. Of these, articular degeneration was the most common, with the detection rates of the high fluoride group (31.55%, 153/485) higher than the low fluoride group (21.58%, 41/190), a statistically significant difference (x2=6.62,p< 0.01). Among the 675 subjects, 72 were diagnosed with osteofluorosis, with most of them occurring in the high fluoride group (x2=25.65,p< 0.01).When the fluoride concentration reaches 6.0-7.0 mg/L, the detection rate increases markedly, to 44.92% (53/118). Regardless of fluoride concentration or degree of osteofluorosis, the most prevalent x-ray sign was change to the periosteum, reaching 95.83% (69/72), articular changes were second with 79.17%, 57/72), and changes to trabecular patterns were observed least (56.94%,41/72); the differences between the three were statistically significant (x2=9.64, p<0.01). Regardless of fluoride concentration, there was degeneration of the elbow, knee, and wrist joints, the detection rate was highest for the elbow joint (17.78%, 120/675), followed by the knee (15.41%, 104/675), and wrist degeneration was observed the least (7.53%, 53/675), the differences between the three were statistically significant (x2=30.74, p<0.01). The detection rate for articular degeneration of the elbow for the high fluoride group (21.03%, 102/485) was markedly higher than the low fluoride group (9.47%, 18/190, x2=12.47, p<0.01). Of the 35 signs detectable by x-ray examination, most were found in both high and low fluoride groups; periosteal changes were rarely seen in the low fluoride group, and often seen in the high fluoride group.
CONCLUSION: The signs of osteofluorosis in detectable in x-rays are quite varied and complex, when x-rays are used for diagnosis a comprehensive analysis should be carried out based on all the various signs and an overall determination made; only then will a diagnosis be correct and reliable.
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Skeletal fluorosis from instant tea
INTRODUCTION: Skeletal fluorosis (SF) can result from prolonged consumption of well water with >4 ppm fluoride ion (F(-); i.e., >4 mg/liter). Black and green teas can contain significant amounts of F(-). In 2005, SF caused by drinking 1-2 gallons of double-strength instant tea daily throughout adult life was reported in
Skeletal fluorosis mimicking seronegative arthritis
Fluorosis is endemic in certain parts of the world, especially the Asian subcontinent (1). We report an unusual presentation of fluorosis mimicking seronegative spondyloarthritis. Although fluorosis is known to cause irritable bowel syndrome-like disorder and joint pain, this could be wrongly diagnosed as a case of seronegative arthritis.
Bone mineral structure after six years fluoride treatment investigated by backscattered electron imaging (BSEI) and small angle x-ray scattering (SAXS): a case report
NaF, a bone formation stimulating agent, is used for the treatment of osteoporosis. Controversy exists concerning the quality of the newly formed bone and the antifracture effectiveness. We report about a 70 years old woman, who had received 50 mg NaF/d for about 6 years. Calcium or Vit D supplements
X-Ray analysis of 80 patients with severe endemic fluorosis caused by coal burning
Radiographs of 80 patients with severe endemic fluorosis of coal-burning type [CBEF] - 49 males and 31 females aged 30 to 70 years - were analysed to examine the changes to the bone substance, peripheral structure of bone, and joints. The changes to bone substance were: 1) osteosclerosis type, 62
Industrial skeletal fluorosis: preliminary report on 61 cases from aluminum smelter
SchIegel presented data on 61 cases of skeletal f1uorosis among workers of a Swiss aluminum factory. Of 350 cases ofìndustrial fluorosis reported in the world's literature, approximately 20 occcured in the smelting area of the aluminum industry. For processing aluminum from clay, cryolite (NaAlF6) is used as a fluxing agent.
Related FAN Content :
Skeletal Fluorosis: The Misdiagnosis Problem
It is a virtual certainty that there are individuals in the general population unknowingly suffering from some form of skeletal fluorosis as a result of a doctor's failure to consider fluoride as a cause of their symptoms. Proof that this is the case can be found in the following case reports of skeletal fluorosis written by doctors in the U.S. and other western countries. As can be seen, a consistent feature of these reports is that fluorosis patients--even those with crippling skeletal fluorosis--are misdiagnosed for years by multiple teams of doctors who routinely fail to consider fluoride as a possible cause of their disease.
As demonstrated by the studies below, skeletal fluorosis may produce adverse symptoms, including arthritic pains, clinical osteoarthritis, gastrointestinal disturbances, and bone fragility, before the classic bone change of fluorosis (i.e., osteosclerosis in the spine and pelvis) is detectable by x-ray. Relying on x-rays, therefore, to diagnosis skeletal fluorosis will invariably fail to protect those individuals who are suffering from the pre-skeletal phase of the disease. Moreover, some individuals with clinical skeletal fluorosis will not develop an increase in bone density, let alone osteosclerosis, of the spine. Thus, relying on unusual increases in spinal bone density will under-detect the rate of skeletal fluoride poisoning in a population.
Variability in Radiographic Appearance of Skeletal Fluorosis
Osteosclerosis (dense bone) is the bone change typically associated with skeletal fluorosis, particularly in the axial skeleton (spine, pelvis, and ribs). Research shows, however, that skeletal fluorosis produces a spectrum of bone changes, including osteomalacia, osteoporosis, exostoses, changes resulting from secondary hyperparathyroidism, and combinations thereof. Although the reason for this radiographic variability is not yet fully understood, it is believed to relate to the dose of fluoride consumed, the individual's nutritional status, exposure to aluminum, genetic susceptibility, presence of kidney disease, and area of the skeleton examined.
Fluoride & Osteoarthritis
While the osteoarthritic effects that occurred from fluoride exposure were once considered to be limited to those with skeletal fluorosis, recent research shows that fluoride can cause osteoarthritis in the absence of traditionally defined fluorosis. Conventional methods used for detecting skeletal fluorosis, therefore, will fail to detect the full range of people suffering from fluoride-induced osteoarthritis.
Estimated "Threshold" Doses for Skeletal Fluorosis
For over 40 years health authorities stated that in order to develop crippling skeletal fluorosis, one would need to ingest between 20 and 80 mg of fluoride per day for at least 10 or 20 years. This belief, however, which played an instrumental role in shaping current fluoride policies, is now acknowledged by the National Academy of Sciences (NAS) and other US health authorities to be incorrect.