in vitro comparative evaluation of stress distribution around zygomatic versus conventional implants in atrophic maxilla

TL;DR

This study compares how stress is distributed in zygomatic and conventional dental implants in patients with severe maxillary bone loss.

Contribution

The study provides new biomechanical insights into zygomatic implants as a superior alternative for atrophic maxillae.

Findings

Quad-zygomatic implant arrangements showed the lowest stress and most even distribution.

Zygomatic implants performed better biomechanically than conventional implants in atrophic maxillae.

Stress values remained within physiological limits under vertical and oblique loading.

Abstract

Severe maxillary atrophy restricts the conventional position of the implants because of insufficient bone height; the alternative
anchorage systems like the zygomatic implants should be used. Therefore, it is of interest to compare the distribution of stress under
zygomatic and conventional implant designs during simulated occlusive loading. Six maxillary models were tested in the von Mises stress,
principal stress and microstrain when the forces are vertical and oblique. Quad-zygomatic arrangements were the least stressed and the
most evenly distributed, being far within the range of physiological values. Zygomatic implants, particularly the quad-zygomatic configurations,
have better biomechanics in atrophic maxillae than standard methods of implants.