Some teeth break due to decay, trauma, fractures and multiple other reasons.  If we cannot get several good years of a restoring a broken tooth, we would recommend an extraction.  Don't worry.  It's not the end of the world to loose a tooth.  Bridges or dental implants can replace a missing tooth.  Another way for multiple missing teeth are dentures or partials. 

Nearly everyone needs their wisdom teeth extracted.  The reason why is because we don't loose our teeth as quickly as we did years ago due to modern dentistry.  Wisdom teeth are extracted while the patient is sedated to make the patient as comfortable as possible.  We recommend extracting wisdom teeth in the late teens because the teeth are easier to remove and patients heal faster.