Related Experiment Video
Updated: Jul 4, 2026
08:01
Designing CAD/CAM Surgical Guides for Maxillary Reconstruction Using an In-house Approach
Published on: August 24, 2018
8.9K
CAD/CAM post and core for telescopic crowns after fracture
International Journal of Computerized Dentistry
|April 3, 2025
Summary
Fracture of teeth supporting telescopic crown-retained removable partial dentures (TCDs) often requires post and core (PC) treatment. A new digital workflow enables chairside fabrication of CAD/CAM PCs, accelerating treatment and improving outcomes.
Area of Science:
- Dental prosthetics
- Digital dentistry
- Restorative dentistry
Background:
- Abutment tooth fracture is a common cause of failure for telescopic crown-retained removable partial dentures (TCDs).
- Conventional post and core (PC) treatments for refitting telescopic crowns (TCs) can be time-consuming and carry a risk of root fracture due to material incompatibility.
Purpose of the Study:
- To evaluate a fully digital chairside workflow for fabricating computer-aided design/computer-aided manufacturing (CAD/CAM) post and cores (PCs).
- To assess the potential of this workflow as an alternative to conventional PCs for refitting TCs after abutment tooth fracture.
Main Methods:
- A case series involving 12 patients with fractured abutment teeth requiring PC treatment for TCDs.
- Chairside scanning of post space and TCDs, followed by rapid fabrication of CAD/CAM PCs using fiber-reinforced composite.
Main Results:
- The digital chairside workflow significantly accelerated PC fabrication, eliminating the need for a second appointment.
- CAD/CAM PCs exhibited mechanical properties closely matching dentin, potentially reducing the risk of root fracture.
Conclusions:
- The presented fully digital chairside workflow offers an efficient alternative for fabricating customized PCs.
- This approach can expedite the refitting of TCs after abutment tooth fracture, enhancing patient care.
Keywords:
CAD/CAMabutment tooth fracturefiber-reinforced compositeintraoral scannerpost and coretelescopic dentureMore Related Videos
Related Concept Videos
01:40Bone Remodeling
Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
01:27Compact Bone
Most bones contain compact and spongy osseous tissue, but their distribution and concentration vary based on the bone's overall function.
Compact bone, also called cortical bone, is the denser, stronger of the two types of bone tissue. It is found under the periosteum and in the diaphyses of long bones, where it provides support and protection. The microscopic structural unit of compact bone is called an osteon, or haversian system. Each osteon is composed of concentric rings of calcified...
Compact bone, also called cortical bone, is the denser, stronger of the two types of bone tissue. It is found under the periosteum and in the diaphyses of long bones, where it provides support and protection. The microscopic structural unit of compact bone is called an osteon, or haversian system. Each osteon is composed of concentric rings of calcified...
01:27Fractures: Bone Repair
Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the procedure...
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the procedure...
01:31Bone Remodeling and Repair
Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during bone...
01:21Tooth Anatomy
The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or grinding food.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or grinding food.