Just got a root-canal tooth extracted due to a fracture (which led to a severe infection). When is the soonest I can get an implant in?

A few months. The bone needs to fill in the defect and the infection needs to clear up completely. This can take anywhere from three to six months, depending on the defect and infection.
2 to 3 months . Latest study showed that immediate implants may be at a higher risk of implant failure and complications than delayed implants. The study suggested 2 to 3 months of alveolar ridge remodeling following tooth extraction is an optimal time. It may be inconvenient to some patients, but the results are more predictable. Just remember, if the maintenance is good, dental implants can last a lifetime. .