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Keywords

Implant, Enamic, Zirconia, Strain Gauge, Modulus of elasticity

Disciplines

Dental Materials | Oral and Maxillofacial Surgery | Prosthodontics and Prosthodontology

Abstract

Purpose: This study was conducted to evaluate the micro-strain around dental implant using two different CAD/CAM crown fabricated materials through strain gauge analysis. Materials and Methods: Five dental implants were fixed in a 5 previously drilled solid rigid polyurethane test blocks in the edentulous area with neighboring abutments mesial and distal printed out using special 3D Dental printer, Cyanoacrylate adhesive was then used to fix the printed-out part on to the polyurethane test blocks, creating the bounded saddle replicas. Ten CAD/CAM screw retained crowns were fabricated; five Enamic crowns from vita enamic blocks, and five zirconia crowns from presintered katana zirconium blocks. Each crown was cemented to abutment and screwed over the implant fixture. Two strain gauges were installed on their corresponding prepared sites to measure the micro-strains in the medium surrounding the implant. For each tested implant, loads were applied by a universal testing machine, micro-strains were recorded with the strain gauges and stress distribution around the implant was statistically evaluated. Results: Micro-strain recording revealed a statistically significant difference in mean micro-strain recording applied in central fossa between Zirconia and Enamic, for both the buccal and lingual measurements, Enamic was significantly lower than Zirconia. Conclusion: The modulus of elasticity of restorative materials has a meaningful effect on forces applied to dental implant and transmitted to the supporting bone.

English Abstract

Purpose: This study was conducted to evaluate the micro-strain around dental implant using two different CAD/CAM crown fabricated materials through strain gauge analysis. Materials and Methods: Five dental implants were fixed in a 5 previously drilled solid rigid polyurethane test blocks in the edentulous area with neighboring abutments mesial and distal printed out using special 3D Dental printer, Cyanoacrylate adhesive was then used to fix the printed-out part on to the polyurethane test blocks, creating the bounded saddle replicas. Ten CAD/CAM screw retained crowns were fabricated; five Enamic crowns from vita enamic blocks, and five zirconia crowns from presintered katana zirconium blocks. Each crown was cemented to abutment and screwed over the implant fixture. Two strain gauges were installed on their corresponding prepared sites to measure the micro-strains in the medium surrounding the implant. For each tested implant, loads were applied by a universal testing machine, micro-strains were recorded with the strain gauges and stress distribution around the implant was statistically evaluated. Results: Micro-strain recording revealed a statistically significant difference in mean micro-strain recording applied in central fossa between Zirconia and Enamic, for both the buccal and lingual measurements, Enamic was significantly lower than Zirconia. Conclusion: The modulus of elasticity of restorative materials has a meaningful effect on forces applied to dental implant and transmitted to the supporting bone.

ISSN

2664-9446

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