Dr. Alvin Neff is an excellent diagnostician. My cap coming off every 3/4 months done by my expensive New Jersey State of the Art Dentist..Shortly after moving to NWA,the Cap came off. I went to Dr. Neff .He replaced it like my former Dentist, but unlike him , he closely examined my bite especially the opposing teeth. He corrected that bite which has led to my crown staying in place - that was 2 years ago. Dr. Neff doesn't take unnecessary X-Rays and builds Night Guards cheaper than my other Dentists.