Annals of Biomedical Engineering

, Volume 30, Issue 10, pp 1251–1261

The Effect of Pulsed Ultrasound on Mandibular Distraction

  • Tarek H. El-Bialy
  • Thomas J. Royston
  • Richard L. Magin
  • Carla A. Evans
  • Abd El-Moneim Zaki
  • Leon A. Frizzell


This study evaluated the effect of pulsed ultrasound on tissue repair and bone growth during mandibular osteodistraction. Twenty-one rabbits were divided into three groups of 7. The distraction started 72 h after surgically severing both sides of the mandible and proceeded at a rate of 1.5 mm/12 h for 5 days. Group 1 received pulsed ultrasound (nominally 200 μs pulse of 1.5 MHz at a 1.1 kHz pulse repetition frequency, 30 mW/cm2) for 20 min on both sides of the mandible every other day (alternating sides). Group 2 received the same pulsed ultrasound treatment on one side of the mandible every day for 20 min. Group 3 did not receive any ultrasound treatment. Bone formation at the distraction site was assessed by photodensitometry on head radiographs, a vibratory coherence test across the distraction site, a postmortem three-point bending mechanical stiffness test, and a postmortem histological examination. Statistical analyses performed using analysis of variance revealed that pulsed ultrasound enhanced bone formation at the distraction site with a high level of significance when assessed by the increase in new bone photodensity (p=0.001), vibratory coherence (p=0.001), mechanical stiffness (p=0.003), and qualitative histological studies, especially when the pulsed ultrasound treatment was directly applied daily. © 2002 Biomedical Engineering Society.

PAC2002: 8750Kk, 8763Df

Bone healing Bone formation Distraction osteogenesis Therapeutic pulsed ultrasound 


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Copyright information

© Biomedical Engineering Society 2002

Authors and Affiliations

  • Tarek H. El-Bialy
    • 1
  • Thomas J. Royston
    • 2
  • Richard L. Magin
    • 3
  • Carla A. Evans
    • 4
  • Abd El-Moneim Zaki
    • 5
  • Leon A. Frizzell
    • 6
  1. 1.Tanta University, Egypt and Department of BioengineeringUniversity of Illinois at ChicagoChicago
  2. 2.Department of Mechanical EngineeringUniversity of Illinois at ChicagoChicago
  3. 3.Department of BioengineeringUniversity of Illinois at ChicagoChicago
  4. 4.Department of OrthodonticsUniversity of Illinois at ChicagoChicago
  5. 5.University of Illinois at ChicagoChicago
  6. 6.Department of Electrical and Computer EngineeringUniversity of Illinois at Urbana-ChampaignUrbana

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