Application of computer assisted navigation in the treatment of unilateral zygomatic complex fractures / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To evaluate the effect of computer assisted navigation system in the treatment of unilateral zygomatic complex fractures.</p><p><b>METHODS</b>Five patients with unilateral zygomatic complex fractures were included in this study.Preoperative design, intraoperative real-time navigation and postoperative evaluation with chromatogram were executed in the unaffected and affected side.</p><p><b>RESULTS</b>Using computer assisted navigation system, the position and direction of the affected side of the unilateral zygomatic complex fracture were confirmed and shown real-time on the screen. The global maximal deviation was less than 2 mm between the affected side and the mirror side of the healthy side with chromatogram.</p><p><b>CONCLUSIONS</b>Computer assisted navigation system can instruct the treatment of unilateral zygomatic complex fractures effectively. The global comparison with chromatogram is more objective for the unilateral zygomatic complex fractures.</p>

Permeability research of human temporomandibular joint disc and cartilage / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To measure the permeability of human temporomandibular joint (TMJ) disc and cartilage to provide basic parameter for oral biomechanics and tissue engineering, and analyze its mechanisms of pathology and load-release.</p><p><b>METHODS</b>Confined compression method was used to measure the permeability (k value) of four cadavers' TMJs, which were sampled into three parts: disc, condyle and glenoid fossa with different diameters (2 mm, 3 mm and 4 mm). All 128 samples were tested with correspond diameter indenter.</p><p><b>RESULTS</b>Larger the sample diameter was, higher the k value became. The highest k value appeared in the disc while the lowest appeared in glenoid fossa.</p><p><b>CONCLUSION</b>In normal condition, TMJ can suffer huge load by decreasing its permeability. Disc is weakest for the higher permeability, it's easy-damaged region is an initiated factor of TMJ disease.</p>