After root canal treatment the tooth needs to be protected and restored, this is what is taught in the books and what is done in most places in practice. On the other hand this is a major source of profit for most dental hospitals or clinics. But let’s look at this issue from a professional point of view. The only thing that needs to be looked at after root canal treatment is strength and aesthetics. It should be a consensus in the academic community that a crown restoration after a root canal is not better than a direct filling. As for the posterior teeth, there is also a consensus that the joint surface should be protected because of the high occlusal pressure. The conventional method is just crown restoration, but the crown itself has many problems, such as adverse effects on the periodontium, which itself has to remove a large number of healthy teeth. So with the development of bonding technology, crown restorations have now been abandoned in the more cutting edge places. The use of high inlays and the like are used to restore teeth after root canal treatment or for occlusal reconstruction. However, high inlays are significantly more difficult to fabricate and bond than crowns. It should not be difficult to popularize. When I was studying at the University of Geneva, Prof. Vailati from the dental hospital told me that they no longer do crowns here and try not to wear their good teeth through bonding techniques, so I hope that I will try to do as few crowns as possible when I return home, because this is certainly a direction for the development of restorative dentistry. At present, the clinical treatment of teeth is gradually following the method studied at the University of Geneva, which is more time consuming but brings very obvious benefits to patients. Suddenly I remembered the words of the last Italian aesthetic restorer: think what you would do to this patient if she were your girlfriend or daughter. Hopefully, one day crowns will no longer be the first choice of domestic dentists.