Tensile Bond Strength, Fit Accuracy and Failure Types of Zirconia and Cast Gold Root Copings for Overdentures.

Aim: To compare the tensile strength, dislodgement forces, marginal gap and failure types between digitally fabricated zirconia root copings and conventionally manufactured cast gold root copings.

Methods: Extracted human teeth (N=30) were prepared for the root copings and randomly divided into 2 groups: (1)zirconia root copings(ZC) and gold root copings(GC). The specimens were tested for tensile bond strength and dislodgement forces in a universal testing machine and the types of the coping failures modes were analyzed.

A custom CAD-CAM resilient attachment: A dental technique.

Custom resilient attachments can be used for removable as well as fixed implant-supported prostheses, with the proposed tooth position being visualized in relation to the underlying metal framework, abutments, and implant positions. Custom resilient attachments and the framework for implant overdentures can be designed together using a computer-aided design software program. Computer-aided designed and computer-aided manufactured (CAD-CAM) custom resilient attachments offer greater angulation compensation than standard attachments when clinically required while accounting for biological, mechanical, and esthetic factors.

Patient Satisfaction and Accuracy of Partial Denture Frameworks Fabricated using Conventional and Digital Techniques.

This case report compares a conventional and a digital workflow for manufacturing metal frameworks for maxillary and mandibular removable partial dentures (RPDs). Two sets of maxillary and mandible RPDs were produced. The metal framework of one set of RPDs was produced conventionally using the lost wax casting technique.

Accuracy of Removable Partial Denture Frameworks Fabricated Using Conventional and Digital Technologies.

This study analyzed the fit accuracy of the removable partial denture (RPD) metal frameworks produced using digital and conventional manufacturing technologies. Mandibular RPD metal frameworks (N=15, n=3 per group) were fabricated on a representative clinical case. RPDs were fabricated using one of the following manufacturing procedures: a) conventional lost-wax casting technique (C-LW), b) conventional casting of milled sacrificial patterns (C-M), c) conventional casting of printed sacrificial patterns (C-P), d) selective laser melting (SLM), e) direct metal laser sintering (DMLS) technologies.