Preventive care dentistry, which consists of teeth cleaning, fluoride treatment, sealants, home dental care, etc., is characterized as the practice of caring for teeth and gums to keep them clean and healthy.
It is entirely safe to get routine dental checkups and teeth cleaning appointments during all the 3 trimesters of pregnancy. However, informing the dentist about your pregnancy is of utmost importance.
Some quick procedures that help in fixing smoker’s teeth are scaling, teeth whitening and gingival grafts. But remember, these are all temporary measures, and they are all futile if you don't quit the habit of smoking.
Experiencing sensitivity in your teeth is a very common phenomenon after professional dental cleaning or deep cleaning which is expected to reduce over time. If these sensations last longer than usual, then talk to your dentist an take the required steps to minimize the sensitivity of your teeth.