Jaw Microarchitecture Evaluated By Micro-CT And Macro Cutting&banding System

ObjectExcept the bone, the anatomy of bony trabecular changes in the jaw bone strength plays a very important role. Bone trabecular subtle the deep understanding of the anatomical structure is so solve the key problems of osteoporosis. Therefore, the aim of this study to determine the influence of jaw bone trabecular anatomical structure measurement by Micro-CT and Macro Cutting&Banding System(An emerging technique in the last year which can achieve three dimensional X-ray photographs with resolution hgher than lOum. It can provide nondestructive assessment and alaysis for alveolar bone,tooth and dental biomaterial samples.According to the operation experience, combined with recent publications,this paper summarized the application of Micro-CT in the field of dental research), the evaluation of Micro-CT(Micro computerized tomogrphy, Micro-CT) in the measurement of the actual application effect. MethodIn this study, thirty-nine (19maxillas,20mandibles) specimens were prepared from fully and partially dentate jaws. Specimens were scanned with Micro-CT and reconstructed three dimensionally. Sections were made parallel to the axis of each tooth. The trabecular bone ratio (TBR) was measured, with the data being statistically using one-way ANOVA (a=0.05).Result1-. Mandible1) The TBR of mandible in all tooth regions was greater in dentate than in edentulous. In the dentate mandible, The TBR reduced gradually from the incisor region to the premolar region, and then increased gradually from the central incisor region to the molar region.2) In all tooth regions of dentate and edentulous it was higher in males than in fem ales. Especially, the TBR of edentulous female group was seen difference glaringly about average10%than man.3) Comparative analysis of the age groups reveals that it was possible to divide them into three district groups. As age increase, the TBR in dentate regions reduced monotonically in the incisor and premolar regions of dentate mandibles, but in the molar region the variation was nonmonotonic. Edentulous mandibles generally showed nonmonotonic variations in the TBR.2、Maxilla1) Comparing data between dentate and edentulous regions revealed a contrast between anterior teeth regions (incisor and canine regions) and posterior teeth regions (premolar and molar regions). The TBR was higher in the dentate than in the edentulous anterior teeth regions, but it was higher in the edentulous posterior teeth region.2) In dentate maxilla, The TBR in lateral incisor, canine, second premolar and first molar region was higher in males than in females. In edentulous maxilla, The TBR of all regions except for lateral incisors was higher in males than in females.3) Comparative analysis of the age groups reveals that it was possible to divide them into three district groups. As age increase, the variations in TBR were more consistently monotonic in dentate maxilla than in edentulous maxilla. In edentate maxilla, the TBR reduced monotonically in the incisor region, but in the canine, premolar, and molar regions the variation was nonmonotonic. In edentulous maxilla, the TBR reduced monotonically in the molar and first premolar regions, but in other regions the variations were nonmonotonic.3、Comparison between mandible and maxillaIn dentate, the TBR was significantly higher in the maxilla than in the mandible between central incisor and lateral incisor, but higher in the mandible than maxilla from first premolar to first molar. In edentulous, the TBR was significantly higher in the maxilla than in the mandible from second premolar to second molar.Conclusion:1、Micro-CT and Macro Cutting&Banding System can reflect the anatomical changes of bony trabecular effection.2、The measurement about the presence of teeth, sex, and age on the bone quality in different tooth regions of the jawbone using Micro-CT would give more valuable information to stomatologists. The direct consequence will improve the success rate of implant and decrease the incidence rate of complications during and after the surgery.