A Study Of Corrosion Casts Of Blood Vessels Of Human Dental Pulp

The microvasculars of dental pulp is the main part of endodontic microcirculation. It relates to the health of teeth and the endodontic diseases. This article reviewed the various methods used to study dental pulp microvasculars. By experiment, a suitable condition of solidification of methyl methacrylate had been found. The vascular casts of the human pulp were fabricated by corrosion casts with low-viscosity methyl methacrylate under the negative pressure. The characteristics of microvascular architecture were studied under the scanning electron microscope.1. The study of effective factors in methyl methacrylate solidificationBy using the completely random design, the effects of proportion of primer, pre-solidification time and the treatment temperature were studied. From the results we found that primer proportion, pre-solidification time and the treatment temperature all had significances to the volume contract of the resin. Under the condition of 1% of primer, 6 minutes for pre-solidification and 70 癈 treatment temperature, the resin contracts least.2. The morphological study of the microvasculature of human dental pulp using corrosion resin castsUnder the negative pressure we perfused the just extracted teeth with methyl methacrylate and Prime&Bond NT as filling materials. Then observed the characteristics of cast structural under light and scanning electron microscope. The results showed that the blood vessels of pulp were abundantly dense. There were many communicating anastomosis between microvasculars. The main direction ofhe vessels was parallel with the long axis of the teeth. The main vessels and their anastomosis were centered hi the model. Then- branches formed dense network, especially beneath the dentin. The anastomosing branches of the terminal capillaries formed circular loops. There are few little arteries and veins. The arteriovenous anastomosis was presented. On the surface of the vascular wall there were some endothelial nuclei impressions. It concluded that the corrosion casts of human dental pulp provided a clear, detailed stereoscopic display of vascular network. The dental pulp was abundant in blood supply. It had both the common characteristics of the terminal circulation and particularities coincided with its physiological structure. The technology of corrosion resin cast was feasible to studying the microcirculation of the human dental pulp.