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Drug
for Bone Disease Linked to 'Jaw Death' ... More than a thousand cases of osteonecrosis of
the jaw, or jaw death, have been reported in ... class of drugs known as
bisphosphonates. Osteonecrosis indicates that part of the... |
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ZOMETA ®, FOSAMAX ®, AREDIA ®, ACTONEL ® Contact Information
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Powell Law Firm,L.C. Click Here to Email Us |
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What is osteonecrosis?
What Are Bisphosphonates Bisphosphonates, analogs of a naturally occurring compound, pyrophosphate, that serves to regulate calcium, are drugs that prevent bone breakdown. A History Bisphosphonates have been known to chemists since the middle of the 19th century. The early uses of bisphosphonates were industrial, mainly for corrosion prevention, and largely used in the textile, fertilizer and oil industries as well as in washing powders. The study and development of bisphosphonates as a major class of drugs for the treatment of bone diseases began only three decades ago. The first report of the biological characteristics of bisphosphonates was published in 1968. At that time, scientists discovered that bisphosphonates have a marked ability to inhibit bone resorption. Bone Structure and Development The two primary bone cells are the osteoclasts and the osteoblasts. The osteoclasts are the cells that resorb, or break down, bone and the osteoblasts are the cells that build up bone. Bone is built during fetal life, youth and adolescence. Once bones are formed, their shape and structure are continually renovated and modified by two processes known as modeling and remodeling. Both modeling and remodeling result in the replacement of old bone by new bone. Modeling and remodeling begin with bone being eroded by osteoclasts, which is then followed by osteoblasts refilling the resorption sites. It is necessary for bone resorption to occur in order to trigger bone formation. Modeling takes place during an individual's growth and is the main process through which the skeleton increases its volume and mass. In modeling, new bone is formed at a different location than where the bone was broken down. This results in a change in the shape of the skeleton and also is the cause for the increase in bone size. The remodeling process occurs in adults. In remodeling, the growth that increases bone shape and size is modified so that the newly formed bone replaces the broken down bone at the same site. Therefore, no change occurs in the shape of the bone. Normally, the amount of bone formed during bone remodeling equals the amount of bone destroyed. When more bone is destroyed than formed, however, a bone loss occurs and bone diseases, such as osteoporosis, may develop. In some instances, such as Paget's disease of bone and osteopetrosis, more bone is produced than is broken down, and this bone is architecturally unsound. How Bisphosphonates Work Bisphosphonates are drugs that suppress or reduce bone resorption by osteoclasts. They do this both directly, by hindering the recruitment and function of osteoclasts (the bone-resorbing cells) and perhaps indirectly, by stimulating osteoblasts (the bone-forming cells) to produce an inhibitor of osteoclast formation. There is now a reasonable understanding of how these drugs work and the differences between the various types of bisphosphonates are better understood. Though bisphosphonates suppress the abnormal bone resorption associated with Paget's disease of bone, fibrous dysplasia and metastatic cancer to bone, they do not cure the diseases. Bisphosphonates are particularly effective in relieving pain in these diseases, however. There is no evidence that bisphosphonates interfere with the healing of fractures.
Bisphosphonates Osteonecrosis Links Correspondence from The New England Journal of Medicine -- Osteonecrosis of the Jaw and Bisphosphonates ... To the Editor: Cases of osteonecrosis of the jaw in connection with the use of ... reports concerning the possible association between bisphosphonates and osteonecrosis of the jaw Correspondence from The New England Journal of Medicine -- Osteonecrosis of the Jaw and Bisphosphonates ... To the Editor: Cases of osteonecrosis of the jaw in connection with the use of ... reports concerning the possible association between bisphosphonates and osteonecrosis of the jaw ... Bisphosphonates. etidronate (Didronel), pamidronate (Aredia), alendronate (Fosamax), risedronate (Actonel ... The bisphosphonates are very powerful, they cause dramatic changes ... (Medical Journal of Australia) Bisphosphonates and osteonecrosis of the jaw ... <PubMed> Schwartz HC. Osteonecrosis and bisphosphonates: correlation versus caution ... Greenberg MS. Intravenous bisphosphonates and osteonecrosis. Oral Surg Oral Med Oral Pathol Oral ... |
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| Osteonecrosis of the Jaws Associated With the
Use of Bisphosphonates: A Review of 63 Cases ... pad, Package
Insert re Osteonecrosis & Bisphosphonates ... |
| Novartis has notified healthcare professionals about new precautions for the company's two bisphosphonate drugs, Zometa (zoledronic acid) and Aredia ... |
| About bisphosphonates; What is
osteonecrosis of the jaw? About a possible link between
osteonecrosis and bisphosphonates; Symptoms of
osteonecrosis ... |
| "Less than 10 percent of reported cases of
'osteonecrosis of the jaw' are related to oral bisphosphonates,"
he says, "so the risks associated are real — but ... |
| Jaw osteonecrosis associated with
bisphosphonates: Multiple exposed areas and its ... Maerevoet M.
Osteonecrosis of the jaw and bisphosphonates. ... |
| Association of Oral Cavity Osteonecrosis with Cancer and Bisphosphonate Therapy ... Osteonecrosis of the jaws associated with the use of bisphosphonates: ... |
| Osteonecrosis of the jaw in cancer after treatment with bisphosphonates: incidence and risk factors. Bamias A, Kastritis E, Bamia C, Moulopoulos LA, ... |
| The FDA review concluded that all
bisphosphonate labels should mention osteonecrosis. Novartis,
maker of Zometa and Aredia, added a precaution about ONJ to ... |
| Osteonecrosis of the jaw in cancer after
treatment with bisphosphonates: incidence and risk factors.
Osteonecrosis of the jaw in cancer after treatment with
... thalasar.com/Prostate/prostate_cancer_treatment/ |
| A causal relationship between bisphosphonate
therapy and osteonecrosis of the jaws has not been established. However,
to better understand the pathogenesis ... |
| FDA said 138 cases of osteonecrosis of
the jaw with the bisphosphonates have been ... Bisphosphonate
Osteonecrosis May Be Class Effect, FDA Safety Review ... |