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A Minimally Invasive Model to Analyze Endochondral Fracture Healing in Mice Under Standardized Biomechanical Conditions
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Miniscrew design and bone response: defining a correlation.

Karan Bhalla1, Anmol S Kalha

  • 1Department of Orthodontics and Dentofacial Orthopedics, ITS Dental College, Hospital and Research Centre, Greater Noida, Delhi (NCR), India. karanbhalla@live.in

Orthodontics : the Art and Practice of Dentofacial Enhancement
|May 7, 2013
PubMed
Summary
This summary is machine-generated.

Hybrid miniscrew implants (MSIs) show lower biologic marker levels and better bone contact than cylindric MSIs. This suggests hybrid MSI design and placement may improve bone response and reduce inflammation.

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Area of Science:

  • Orthodontics and Dental Implantology
  • Biomaterials Science
  • Tissue Engineering

Background:

  • Miniscrew implants (MSIs) are crucial for orthodontic anchorage.
  • Understanding bone response to different MSI designs and placement is essential for successful treatment.
  • Biologic markers in peri-miniscrew implant crevicular fluid (PMICF) can indicate bone-implant interaction.

Purpose of the Study:

  • To correlate MSI micro/macro architecture and placement method with bone response indicators.
  • To compare surface morphology of hybrid and cylindric MSIs before and after retrieval.
  • To evaluate biologic markers in PMICF as indicators of bone response to MSIs.

Main Methods:

  • Prospective clinical trial involving ten patients using a split-mouth technique.
  • Placement of hybrid and cylindric MSIs in the intraradicular area between premolars and molars.
  • Collection and analysis of PMICF on days 0, 7, 14, 21, 28, and 42.
  • Scanning electron microscopy (SEM) analysis of MSI surface morphology before and after retrieval.

Main Results:

  • Alkaline phosphatase (ALP) and aspartate aminotransferase (AST) levels were lower in hybrid MSIs compared to cylindric MSIs.
  • ALP and AST levels increased significantly from days 0-14 and then decreased from days 21-42 for both MSI types.
  • SEM revealed a more extensive oxide layer on hybrid MSIs compared to cylindric MSIs.

Conclusions:

  • Cylindric MSIs exhibited higher levels of tissue destruction markers (ALP, AST) than hybrid MSIs, correlating with type and placement.
  • Inflammatory markers peaked around day 14, suggesting an active inflammatory process related to tissue trauma.
  • Greater oxide layer formation on hybrid MSIs may indicate a superior bone-miniscrew implant contact ratio.