Persistent soreness in my top two front teeth that just seems spontaneous. no grinding with other teeth or flicking occurs. any suggested causes?

There are numerous possibilities as to causes of soreness in upper central incisors. Soreness may be in the teeth, in the bone or gums supporting the teeth, in the nerves that supply this are, and so forth. You will have to see a General Dentist, a Periodontist, an Endodontist, a specialist in Oral Medicine, or an Oral Pathologist to begin the testing required to answer your question.