Influence of a Resilient, Hard-Carbon Thin Film on Drilling Efficiency and Thermogenesis

Authors

  • Janik C. Gasiorowski VMD,

    Corresponding author
    • Department of Clinical Studies, New Bolton Center, School of Veterinary Medicine, University of Pennsylvania, Kennett Square, PA
    Search for more papers by this author
  • Dean W. Richardson DVM, Diplomate ACVS,

  • Raymond C. Boston MS, PhD,

  • Thomas P. Schaer VMD


  • Presented in part at the ACVS Symposium, Seattle, WA, 2010.

Corresponding Author

Janik C. Gasiorowski, VMD, Department of Clinical Studies, New Bolton Center, School of Veterinary Medicine, University of Pennsylvania, 382 West Street Road, Kennett Square, PA 19348

E-mail: janikg@vet.upenn.edu

Abstract

Objective

To determine changes in drill bit performance attributable to application of a triaxially resilient, hard-carbon thin film.

Study Design

In vitro mechanical study.

Methods

Five matched pairs of control bits and bits with a carbon nanofilm applied were tested in equine cortical bone and a synthetic bone substrate. Thirty sequential holes were drilled with each bit. Drilling time was recorded for all holes. Maximum substrate temperature was measured with infrared thermography for holes 1, 15, and 30. Drilling time, prolongation of drilling time over successive uses, and maximum substrate temperature were compared between control and test bits in each substrate.

Results

Drilling time was significantly reduced with test bits in both substrates. Drilling time over successive osteotomies increased more slowly with test bits than with control bits. Test bits generated significantly lower substrate temperatures during drilling.

Conclusions

Bits with the carbon nanofilm completed osteotomy faster and generated less heat than control bits. Test bits also had less degradation of drilling performance with repeated use.

Ancillary