Does having a tooth infection automatically means you will get capsular contracture?

The short answer is no - a tooth infection does NOT mean you will get a capsular contracture. However, if you have an ongoing tooth infection or are having necessary dental work, I would not recommend having breast implants placed until the infection is cleared. The concern with dental procedures has to do with a chance of having bacteria in the bloodstream for a short period of time. If you have recently had breast implants (within 3 months), the implant capsule is forming and is very vascular. The concern is that bacteria in the bloodstream could seed the capsule and lead to a contracture or implant infection. This is one reason why elective implant procedures are contraindicated if you have an ongoing infection somewhere in your body (UTI, sinus infection, etc.).

There is not evidence in the literature that I know of that suggests a tooth infection will cause a capsular contracture.  Treat the tooth infection as recommended by your dentist.