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Passively fitting implant-supported complete-arch interim restoration.

Xiaoqiang Liu1, Man Li2, Jianzhang Liu3

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This study introduces a method for creating durable implant-supported interim restorations. The technique enhances fracture resistance for complete-arch dental prostheses.

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Area of Science:

  • Dental Materials Science
  • Prosthodontics
  • Biomaterials Engineering

Background:

  • Fabricating implant-supported interim restorations presents challenges in achieving passive fit and preventing premature fracture.
  • Current techniques may not adequately address stresses induced by polymerization shrinkage, compromising restoration integrity.

Purpose of the Study:

  • To present a novel technique for fabricating a passively fitting, implant-supported, screw-retained complete-arch interim restoration.
  • To enhance the resistance of such restorations to early fracture.

Main Methods:

  • Utilized a splinting technique to obtain two gypsum casts from an implant impression.
  • Fabricated the complete-arch interim restoration with abutment access holes on one cast, reinforcing it with a glass fiber splint.
  • Connected the restoration to restorative abutments on the second cast extraorally to mitigate polymerization shrinkage stresses.

Main Results:

  • The described technique allows for the fabrication of a passively fitting interim restoration.
  • The incorporation of a glass fiber splint and extraoral connection significantly improves resistance to early fracture.

Conclusions:

  • This technique offers a reliable method for producing robust and well-fitting implant-supported interim complete-arch restorations.
  • The approach effectively minimizes internal stresses, leading to enhanced longevity and clinical performance.