FDA Warns 2 Breast Implant Makers on Studies

FDA has issued Warning Letters to two breast implant manufacturers for failing to comply with post-market study requirements included in their premarket approval orders. The studies were to assess the long-term safety and risks of the companies’ silicone gel-filled implants. Warning Letters went to Mentor Worldwide, Irvine, CA, and Sientra, Santa Barbara, CA.

The Mentor letter noted several serious deficiencies, including that the company failed to enroll the required number of patients in the study, had poor follow-up rates with study patients, and had significant data inconsistencies, including poor patient accounting and missing race and ethnicity data.

The Sientra letter said the manufacturer had a follow-up rate of 61%, below the target rate.

Both companies were told to respond with details on how they will correct the violations.

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