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In vitro evaluation of a removable partial denture framework using multi-directionally forged titanium.

Ginga Suzuki1,2, Satoshi Shimizu1,2, Mana Torii1

  • 1Department of Removable Prosthodontics, Tsurumi University School of Dental Medicine, Kanagawa, Japan.

The Journal of Advanced Prosthodontics
|January 25, 2021
PubMed
Summary

Multi-directionally forged titanium (MDF-Ti) shows comparable wear resistance and plaque adhesion to commercially pure titanium (CP-Ti) in removable partial dentures (RPDs). MDF-Ti demonstrates superior machinability, making it a viable framework material for RPDs.

Keywords:
MachinabilityMulti-directionally forged titanium (MDF-Ti)Removable partial dentures (RPDs)Wear resistance

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Area of Science:

  • Biomaterials Science
  • Dental Materials
  • Materials Engineering

Background:

  • Removable partial dentures (RPDs) often utilize titanium frameworks for their biocompatibility and mechanical strength.
  • Optimizing the mechanical properties and manufacturability of titanium alloys is crucial for improving RPD performance.
  • Multi-directionally forged titanium (MDF-Ti) presents an ultrafine-grained structure with potential benefits for dental applications.

Purpose of the Study:

  • To evaluate the suitability of multi-directionally forged titanium (MDF-Ti) as a framework material for removable partial dentures (RPDs).
  • To compare the wear resistance, plaque adhesion, and machinability of MDF-Ti against commercially pure titanium (CP-Ti).

Main Methods:

  • Wear resistance was assessed by measuring volume loss of titanium specimens before and after wear testing.
  • Plaque adhesion was evaluated using an assay with *Streptococcus mutans*.
  • Machinability was tested by cutting and grinding MDF-Ti and CP-Ti samples using standard dental burs and abrasive points.
  • Statistical analysis was performed using unpaired t-tests to determine significant differences.

Main Results:

  • MDF-Ti exhibited wear resistance and plaque adherence comparable to CP-Ti (P > .05).
  • Machinability tests revealed significantly greater volume loss for MDF-Ti compared to CP-Ti under most conditions (P < .05), except at 100/30,000 g/rpm.
  • Despite higher volume loss in some machinability tests, MDF-Ti demonstrated better overall machinability than CP-Ti.

Conclusions:

  • MDF-Ti possesses wear resistance and plaque adherence properties suitable for RPD applications, similar to CP-Ti.
  • The enhanced machinability of MDF-Ti suggests it is a promising material for fabricating RPD frameworks.
  • MDF-Ti represents a viable alternative framework material for removable partial dentures.