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INDEPENDENT LABORATORY REPORT SHOWED NO IMPLANT-RELATED ADVERSE REACTION IN DOG STUDY

 INDEPENDENT LABORATORY REPORT SHOWED NO IMPLANT-RELATED
 ADVERSE REACTION IN DOG STUDY
 MIDLAND, Mich., Jan. 16 /PRNewswire/ -- Dow Corning today reaffirmed the postive outcome of a dog study conducted between 1967 to 1970 concerning silicone breast implants. The study, performed by an independent laboratory, found no connection between the death of one of the dogs in the study and silicone breast implants.
 This study was one of hundreds of safety studies conducted that supported the safety of silicone breast implants. It has been suggested that the company failed to report that one of the dogs in this particular study died while another dog developed a granuloma near the implant.
 First and foremost, there was no attempt made by Dow Corning to characterize the results of the study as anything other than what it showed, the company said. And what it showed was that there was no unexpected nor adverse reaction within the dogs as a result of having implants.
 This study, as with some others performed in the compilation of this massive body of safety data on implants, was conducted by a reputable laboratory outside of Dow Corning. The report on the outcome of the study clearly stated that one of the dogs died, but the toxicologists performing the study did not believe the dog's death was related to the implanted material. In fact in the "Summary and Conclusion" section of the report, it states "mortality (48 weeks) was not associated with implant material."
 Three years later, two Dow Corning employees wrote an article for Medical Instrumentation which is generally not considered a scientific medical journal. As the title suggests, this journal publishes papers on medical instrumentation and materials.
 The death of the dog was not cited in their article because, again, the original contractor of the study didn't find it to be related to implants.
 The granulomas cited in the study also were not identified by the original contractors as being an unusual reaction. Most manmade materials implanted in the human body, whether they be knee joints or heart pacemakers, cause a certain amount of inflammation which usually does not last beyond several weeks.
 Normally, tissue surrounds and protects the body from the introduction of any manmade material, and normal function and health of the tissue returns. This is precisely what happened in this study.
 In addition, some of reported inflammation was caused by Dacron mesh used to secure the implants in the dogs. Earlier in the history of implants, doctors thought it was necessary to secure silicone implants in the body with Dacron material. However, advances in the science suggested this was not necessary, which was good news for doctors and patients since Dacron, unlike silicone, can cause a reaction in the human body.
 In fact, silicone is the standard against which all other manmade, medical materials are compared since the body has no serious reaction to this natural material.
 To summarize, this study, which is one of more than 200 performed over the past 30 years on silicone breast implants, further encouraged Dow Corning scientists that silicone was safe to use in implantable medical devices, like breast implants and other medical devices as well.
 To receive a copy of a more detailed background paper on the study and journal article, please call Barbara Carmichael at 517-496-6470.
 -0- 1/16/92
 /CONTACT: Barbara Carmichael of Dow Corning Corp., 517-496-6470 (office) or 517-631-8072 (home)/ CO: Dow Corning Corp. ST: Michigan IN: MTC SU:


EH-JL -- LA034 -- 0797 01/16/92 20:26 EST
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Date:Jan 16, 1992
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