My dentist was trying to explain this to me as there is minimal molar tooth to bond a crown - he tried with a crown but I have sensitivity in one corner that he has been unable to remove / but it is very sensitive to touch and brushing
You can go through the classification and contents of periodontal pocket from our channel. Link ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-G1zdcdDF3Vo.html