Part‐Digitizing System of Impression and Interocclusal Record for Complete Denture Fabrication

Abstract

Few studies have reported the application of digital technology to removable dentures, particularly for the process of impression and interocclusal recording for complete denture fabrication. This article describes a part-digitizing system of impression and interocclusal records for complete denture fabrication. The denture foundation area in an edentulous mouth, including the border areas and residual ridge, is outlined by tracing the surfaces with a 3-D pen-type digitizer. Specialized trays for final impressions and interocclusal records were generated using computer-aided design and manufactured using the digital data. Final impression and interocclusal records were carried out using these specialized trays. The computer-aided method using preliminary digital impressions and specialized trays would be feasible for clinical use for complete denture fabrication.

Additive Manufacturing Technologies Used for Processing Polymers: Current Status and Potential Application in Prosthetic Dentistry

“…The development of digital systems allows the manufacturing of complete dentures (CD) through CAD/CAM procedures [38][39][40][41][42][43][44][45][46][47] where a denture base can be milled or both the denture base and the denture teeth can be milled in one piece. 41,42,45,46 Maeda et al 40 published the first scientific report in English where CAD/CAM was described to fabricate a CD.…”

“…When manufacturing a CD, a complete digital workflow includes the digital impression of the completely edentulous arch, including challenging areas for the intraoral devices like the registration of mobile areas such as the non-keratinized tissue or smooth surfaces covered by saliva. 39,40 Patzelt et al 38 developed an in vitro study to analyze the capability of intraoral scanners to reproduce accurate edentulous arches. The authors concluded that these digital impressions appear to be feasible, although the accuracy of the scanners differs significantly.…”

Comparing accuracy of denture bases fabricated by injection molding, CAD/CAM milling, and rapid prototyping method

“…Maeda et al have reported the first scientific report describing the CAD/CAM procedure for fabricating a complete denture 13. When manufacturing a complete denture using digital workflow, the process begins with digital scanning of the edentulous arch, including challenging areas for the intraoral scanner device to scan, which are movable areas such as non-keratinized tissue and smooth surfaces covered with saliva 1314. Many researches have been inclined to scan the edentulous master cast using an extraoral scanner 15.…”

A Technique for Digital Impression and Bite Registration for a Single Edentulous Arch

“…Interocclusal records, due to their dimension and elasticity, were bound to introduce errors when used to align the maxilla and mandible . In addition, the technique required a second appointment for obtaining interocclusal records, as edentulous patients who had no occlusal contact points of natural teeth required the fabrication of resin or wax record bases for stable interocclusal records . Any attempt to reduce the number of visits and chair time reduces overhead expenses and is appreciated by patients.…”

“…10,13,14 In addition, the technique required a second appointment for obtaining interocclusal records, as edentulous patients who had no occlusal contact points of natural teeth required the fabrication of resin or wax record bases for stable interocclusal records. 15,16 Any attempt to reduce the number of visits and chair time reduces overhead expenses and is appreciated by patients. This consideration prompted us to refrain from using resin or wax record bases for interocclusal registrations.…”