Fracture Forces and Failure Types of Zirconia Endocrowns with Different Designs in Mandibular and Maxillary Molars and Premolars
Year: 2026
Type: article
Abstract: Regarding mechanical strength, zirconia is superior, which explains why it is gaining popularity in the field.13 In addition to their biocompatibility, 14 zirconia materials have enhanced their capability to achieve esthetic, translucent outcomes through the production of high levels of the cubic phase.15 Monolithic zirconia restorations exhibit superior durability compared with other ceramic types, resulting in the reduction of the possibility of chipping during oral function and excessive chewing.16 Also, it has proven to be more resistant to fractures compared with lithium disilicate and other IntroductIonPatients undergoing endodontic treatment with extensive tooth structure damage present a challenge for prosthetic dentistry due to the tooth's weakening and increased risk of fracture.1 Endodontically treated teeth are often covered with crowns to avoid these fractures.Although conventional treatments such as intraradicular postcore restoration have been commonly employed, their limitations, such as the risk of root fracture, warrant other alternatives.2,3 Endocrowns (ECs) are conservative and effective alternative monoblock prostheses that utilize the pulp chamber for retention; they have many advantages over conventional postcore crown restorations, such as minimal tooth preparation, cost-effectiveness, short clinical time, improved biomechanical properties, enhanced esthetics, and a long survival rate.2,[4][5][6][7] Indeed, achieving a long-term survival rate for EC depends on the type of selected restorative materials and preparation design involved.Computer-aided design/computer-aided manufacturing (CAD/CAM) systems have revolutionized restorative dentistry, particularly through the fabrication of ECs.8,9 In parallel with the improvements in CAD/CAM, several materials, such as multilayer zirconia, lithium disilicate, and composite resins, offer unique advantages.
Source: World Journal of Dentistry
Author: Ghadeer Saleh Alwadai
Institution: King Khalid University
Language: English
Subfield: Orthodontics
Field: Dentistry
Domain: Health Sciences
Open Access status: diamond
OpenAlex ID: W7129453105