Studies on Occlusal Adjustment Supply

Marking on the Porcelain Surface

Abstract

The occlusal equilibration is very important procedure in the prosthodontics, especially crown and bridge prosthesis and plate prosthesis. The suitable occlusion is not adjusted by this procedure, as the result it, the overload or decubital ulcer on a specified teeth, tissue and temporomandibular joint disfunction may be taken in some cases. So the method and material of occlusal equilibration are very important factors for correcting occlusion.
There are many reports for the method of occlusal equilibration, but there are few studies for occlusal adjustment supply. Furthermore, it is considered that the marking material and surface roughness used in these reports are rarely associated with the practical dentistry.
The different surfaces of porcelain plate generally used in dental clinic are elected for the specimen. Then it is examined thoroughly that the differences of occlusal adjustment supply and clinical experience have an effected on the discriminating ability, repeat marking, bleeding coefficient of occlusal adjustment supply. As the results of these studies, the author arrived at the following conclusions.
1. Discriminating ability:
1) Concerning the discriminating ability on the surface roughness of porcelain and clinical experience, the polyethylen-made occlusal adjustment supply is best, in the order of silk and paper are unsuitable.
2) Regarding as it's ability on the surface roughness of porcelain, the rough surface is better than the smooth.
3) As it's ability on the clinical experience, the silk and paper-made occlusal adjustment supply are overstimated beyond it's precision without the clinical experience. Especially, it has a remarkable tendency that the inexperienced group overstimates more than the experienced. On the contrary, the polyethylene-made is underestimated.
2. Repeat making:
1) Concerning the repeat marking on the surface roughness of porcelain and clinical experience, the silk-made occlusal adjustment supply is largest in frequency, in the order of the paper and polyethylene are on the decrease.
2) About it's frequency on the surface roughness of the porcelain, the rough surface is larger in frequency than the smooth.
3) Regarding as it's frequency on the clinical experience, especially the inexperienced group overstimates more.
3. Bleeding and bleeding coefficient:
1) As for the bleeding and bleeding coefficient on the surface roughness of porcelain and each condition, the polyethylene-made occlusal adjustment supply is little, in the order of the silk and paper gain in quantity.
2) About the bleeding and bleeding coefficient on the surface roughness of porcelain, the smooth surface is little than the rough.
3) Regarding the bleeding and bleeding coefficient on each condition, the paper-made occlusal adjustment supply at the dry condition is less than at the wet condition. The silk and polyethylene supply are almost same level without the condition.