Ensuring passivity and retrievability for immediate complete-arch implant-supported prostheses

Area of Science:

• Dental Prosthodontics
• Biomaterials Engineering
• Implant Dentistry

Background:

• Achieving passive fit in complete-arch implant-supported prostheses is crucial for long-term success.
• Traditional fabrication methods can introduce dimensional inaccuracies during casting, compromising prosthesis stability.
• Existing techniques often involve trade-offs between cement-retained and screw-retained systems.

Purpose of the Study:

• To present a novel fabrication technique for immediate complete-arch implant-supported prostheses.
• To ensure dimensional stability and passive fit, preventing issues from casting alterations.
• To combine the benefits of cement-retained and screw-retained prostheses.

Main Methods:

• Fabrication of frameworks for immediate complete-arch implant-supported prostheses.
• Preparation of titanium abutments on the definitive cast for interim screw-retained prostheses.
• Framework waxing to preserve screw access channels.
• Casting the framework and cementing it onto prepared abutments.

Main Results:

• The technique eliminates the need for sectioning and soldering, preventing framework weakening.
• Dimensional alterations during casting do not compromise the passive fit of the prosthesis.
• The fabricated framework offers the retrievability of screw-retained systems with the stability of cement-retained ones.

Conclusions:

• The described technique provides a reliable method for fabricating passive, implant-supported complete-arch prostheses.
• It simplifies the fabrication process, reducing delays and improving framework integrity.
• This approach offers a hybrid solution, enhancing clinical outcomes for implant restorations.