I am one of the minority of plastic surgeons who DO recommend oral antibiotic prophylaxis with dental work, or any invasive procedure which produces a bacteremia (there aren't many, but dental work is the most common). I have seen 5 cases (over the 27 years I have been performing breast augmentation) of late unilateral and 1 bilateral cpasular contracture after many years of absolute softness (examined and verified), where the only relatable occurrences are dental procedures, including cleaning. No trauma or other identifiable cause.
The hypothesis is that it's not JUST exposure to the bacteria in your mouth that get into your blood stream after dental work, but also a minor, often unremembered bump or bruise to the breast (or breasts) that allow those circulating bloodstream bacteria to "get into" the space around your implants and stimulate capsular contracture from the bacteria-induced biofilm. Antibiotics may not prevent the minor trauma, but will help to kill the bacteria before a critical exposure is reached IF such a trauma and exposure coincide.
So, you ask about tattooing. The skin is indeed damaged. but this is not a bacteria-filled environment like the mouth, so unless you have chronic acne issues or the tattoo is extensive, I would not recommend antibiotics here either. Dental work, colonoscopic polyp removal, cervical cone, etc. YES, but tattoo session or ear piercing, NO.
Thanks for asking! Best wishes! Dr. Tholen