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Fluoride therapy for osteoporosis promotes a progressive increase in spinal bone density
S M Farley1, C R Libanati, M R Mariano-Menez
1Department of Medicine, Loma Linda University, CA.
Summary
Fluoride therapy significantly increased spinal bone density in postmenopausal women with osteoporosis over two years. This treatment also elevated serum alkaline phosphatase, indicating a positive skeletal response to fluoride for managing osteoporosis.
Area of Science:
- Orthopedics
- Endocrinology
- Geriatrics
Background:
- Osteoporosis is characterized by diminished bone density, leading to common vertebral fractures.
- Effective osteoporosis treatment requires agents that increase spinal bone density.
- Fluoride therapy is investigated for its potential to enhance bone density.
Purpose of the Study:
- To evaluate the effect of fluoride therapy on spinal bone density in postmenopausal osteoporotic women.
- To assess changes in vertebral trabecular bone density during fluoride treatment.
- To correlate skeletal response markers with bone density changes.
Main Methods:
- A cohort of 61 postmenopausal osteoporotic women (aged 70 ± 9 years) received fluoride (34 ± 7 mg elemental/day) and calcium (1500 mg/day).
- Treatment duration was 19 ± 6 months, with observations up to 2 years.
- Quantitative computed tomography measured vertebral trabecular bone density; serum alkaline phosphatase activity was also monitored.
Main Results:
- Spinal bone density increased by 42% (10 ± 13 mg/cm³) within 6 months (p < 0.001) and continued to rise over 2 years.
- An early increase in serum alkaline phosphatase activity (p < 0.001) correlated with bone density gains (r = .58, p < 0.001).
- Significant interpatient variation in response was observed, unrelated to baseline density, age, or fluoride dose.
Conclusions:
- Fluoride therapy demonstrates therapeutic value by linearly increasing trabecular bone density in the osteoporotic spine for up to 2 years.
- Measuring spinal bone density and serum alkaline phosphatase activity can serve as valuable clinical indices of skeletal response to fluoride treatment.
- Further research may explore factors influencing interpatient variability in response to fluoride therapy for osteoporosis.