NCT07215208

Abutment Analysis of Metallic Denture Frameworks in Mandibular Kenedy Class III Cases

Abutment Health and Occlusal Analysis of CAD-CAM and Conventional Metallic Partial Denture Framework in Mandibular Kenedy Class III Cases: A Randomized Cross Over Clinical Trial

• Status: Not Yet Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 22 (estimated)
• Sponsor: Cairo University · Academic / Other
• Sex: All
• Age: —
• Healthy volunteers: Accepted

Summary

This study is aimed to compare CAD/CAM (digitally fabricated) metallic partial denture frameworks to conventionally fabricated metallic partial denture frameworks in mandibular Kennedy class-III arches in terms of abutment health and occlusal analysis

Detailed description

Traditional metallic partial dentures with cobalt-chromium frameworks and clasps considered a reliable choice because they're affordable, durable and have a resistance to distortion. However, the fabrication of traditional metallic partial dentures involves several manual steps, like pouring of the stone casts, surveying the hard tissue and soft tissue undercuts to choose the best path of insertion, and meticulously waxing each component (major and minor connectors, rests, clasps, and denture base retainers) directly onto the cast. This hands-on process can result in some fabrication errors, which by in turn can increase the stresses on the teeth supporting the denture (abutments) and even other non-abutment teeth. CAD/CAM technology is increasingly being used for the fabrication of metallic partial denture frameworks; it has been highlighting in several investigations. The workflow starts with an intra oral digital scan of the oral cavity, to generate a 3D digital model, that allows for electronic surveying. The metallic partial denture frameworks are then designed virtually using specialized software, after which a wax pattern is created by milling or rapid prototyping. Then the wax pattern would be casted conventionally into metallic partial denture frameworks. The key advantages are simplifying the fabrication process, enhance the accuracy of fit, and reduce the stresses on abutment teeth, significant time savings, and reduction of the potential errors inherent in traditional multi-step lab procedures

Conditions

• Occlusion
• Prosthesis Durability

Interventions

Type	Name	Description
OTHER	CAD/CAM metallic partial denture frameworks	The CAD/CAM workflow starts with scanning of the physical model (master cast) to create a 3D virtual representation. Dental professionals then digitally analyze this virtual model and design the metallic partial denture frameworks using specialized computer software. Once the design is finalized, a wax pattern of the framework is either milled or 3D printed. Then proceeding with this wax pattern to fabricate the final metal partial denture framework, either by conventional casting process, or milling of the metallic framework
OTHER	Conventional metallic partial denture frameworks	The metallic partial denture frameworks have proven to be affordable and convenient treatment option for partially dentate patients for it is rigidity and durability. It can be used in thin sections and provide high strength and stiffness. However, metallic partial denture frameworks also come with several drawbacks. A significant concern for some patients is the metallic display, which can lead to poor esthetics. Other disadvantages include increased prosthesis weight, a potential metallic taste, and a tendency for plaque accumulation. Additionally, they can induce stresses on the abutment teeth

Timeline

• Start date: 2025-10-01
• Primary completion: 2026-01-01
• Completion: 2026-01-01
• First posted: 2025-10-10
• Last updated: 2025-10-10