Hard palate deformation in an animal model following quasi-static loading to stimulate that of orthodontic anchorage implants

Eur J Orthod. 2001 Aug;23(4):349-54. doi: 10.1093/ejo/23.4.349.

Abstract

The aim of the present investigation was to identify adequate implant treatment for young patients. In an animal model palate deformation was investigated by acute quasi-static loading. Three series of tests (with newborn, young and adult pigs) were performed, each with two groups (one or two-point stress) and 5-7 animals per group. Discs with a diameter of 3 and 5 mm were placed in group 1 in the suture area, and in group 2 at both the right and left sides of the suture. Deformation was analysed by a computerized three-dimensional (3D) photo-imaging evaluation system. In young animals the one-point load at a significantly lower force level led to fractures in comparison with the two-point load (P < 0.001). Similar results were measured by an increase in the size of one disc from 3 to 5 mm (P < 0.001). In contrast, adult pigs showed stable results with both methods. In general, a larger disc diameter led to less instability. The one-point load seems to be suitable for adult animals, whereas a two-point load might be favourable during ossification. The advantage of the two-point load is the generation of a higher stress and therefore improved control of dental fixation. However, further tests are necessary to investigate the long-term effects.

Publication types

  • Comparative Study

MeSH terms

  • Age Factors
  • Animals
  • Animals, Newborn
  • Cranial Sutures / physiology
  • Dental Implantation, Endosseous
  • Dental Implants*
  • Image Processing, Computer-Assisted
  • Imaging, Three-Dimensional
  • Jaw Fractures / physiopathology
  • Models, Animal
  • Orthodontic Appliance Design
  • Orthodontic Appliances*
  • Osteogenesis / physiology
  • Palate, Hard / physiology*
  • Statistics as Topic
  • Stress, Mechanical
  • Swine
  • Tooth Movement Techniques / instrumentation*
  • Weight-Bearing

Substances

  • Dental Implants