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A 2-Stage Root Analog Implant with Compact Structure, Uniform Roughness, and High Accuracy.

X Yu1,2,3, B Feng1,2,3, Y Lan1,2,3

  • 1Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.

Journal of Dental Research
|April 10, 2023
PubMed
Summary
This summary is machine-generated.

A new root analog implant (RAI) manufactured using selective laser melting improves immediate implant placement. This novel implant shows enhanced bone integration and chewing function in animal studies, expanding clinical applications.

Keywords:
biocompatibilitydental implantdental materialsosseointegrationsurface propertiestitanium

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Area of Science:

  • Biomaterials Engineering
  • Dental Implantology
  • Additive Manufacturing

Background:

  • Immediate implant placement offers efficiency but has limited indications.
  • Conventional implants face challenges in achieving optimal osseointegration and stability.

Purpose of the Study:

  • To develop a novel root analog implant (RAI) using selective laser melting for improved immediate implant placement.
  • To enhance fracture resistance, osseointegration, and stress distribution in dental implants.

Main Methods:

  • Manufactured RAIs using selective laser melting with optimized density (99.73%) and surface roughness (11 μm Sa).
  • Controlled dimensional deviation within 0.15 mm through optimized scanning parameters.
  • Evaluated cell proliferation, spreading, and osteogenic differentiation of printed substrates.
  • Conducted in vivo experiments to compare RAI with conventional implants for bone-implant contact (BIC) and bone volume/total volume (BV/TV).
  • Designed customized abutments for RAI restoration and assessed masticatory function in beagle dogs.

Main Results:

  • Optimized RAIs exhibited high internal density and uniform surface roughness.
  • Printed substrates promoted human bone marrow stromal cell osteogenic differentiation.
  • RAIs showed significantly higher BIC (75% ± 7%) and BV/TV (74% ± 7%) compared to conventional implants (BIC 66% ± 5%; BV/TV 62% ± 5%).
  • Crown restoration on RAIs improved masticatory ability in beagle dogs.

Conclusions:

  • The novel 2-stage RAI manufactured by selective laser melting demonstrates superior osseointegration and mechanical properties.
  • This technology offers a personalized solution for immediate implant placement, potentially standardizing its clinical application.
  • RAIs show promise for enhancing fracture resistance, initial osseointegration, and stress dispersion.