The book focuses on the integral relationship between successful endodontic treatment and the quality of final restoration, emphasizing that the process isn't complete until an appropriate coronal restoration is in place. It discusses how various factors such as dental caries, access preparation, and root canal procedures can affect tooth resilience and fracture resistance after endodontic treatment. Contrary to common belief, endodontic treatment doesn't inherently weaken teeth but rather the structural integrity loss due to various treatments that contribute to higher fracture risk. Ultimately, the book underscores the critical role of high-quality resin based restorative treatment for endodontically treated teeth in view of ensuring the long-term success of root canal therapy.