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Reproducibility of the vertical dimension by different educational degrees

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Abstract

Background: The establishment of the correct vertical rest position is considered essential, because this position is a critical landmark in determining the vertical relation of occlusion. Unfortunately, the physiologic rest position is variable as it may be influenced by muscle tension, fatigue, and properioception. A study was therefore, undertaken to investigate the repeatability of vertical dimension measurement by different education degree groups. Materials and methods: thirty patients were investigated for vertical dimension measurement by different education degree groups (5th class undergraduate students, house officers dentists, MSc and PhD), depending on a very popular and simple method by using millimeter ruler. Result: the result showed that the difference in the vertical dimension measurements by the four different education degree groups was clinically not significant. Conclusion: 1.The vertical dimension measurements obtained from the undergraduates and house officer dentists were dependable. 2.The time-span of the measuring procedure has no effect on the determination of the vertical dimension throughout a single visit. 3.The caliper method was practical, simple and accurate in academic work. As The result of this study reveals the reproducibility of this method by all of the investigators.


Article
The effect of denture cleansers on the color stability, water sorption and water solubility of stained light cured acrylic denture base material

Author: Dr. Aseel Mohammed Al-Hachem Al-Khafaji, B.D.S., M.Sc.* د.اسيل محمد
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2007 Volume: 4 Issue: 2 Pages: 174-181
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

The dirty denture may have undesirable effect on patient's health and ability to successful wear of the denture, if a patient's denture becomes unsanitary, the consequences may be bad breath, poor esthetic, denture stomatitis and angular cheilitis and the using of the denture cleanser is the solution for this problem but the prolong use of such cleansers may affect the properties of the denture. The aim of the study is to observe the effect of denture cleansers on color stability, water sorption and water solubility of the light cured acrylic resin after their immersion in tea solution.Light curing acrylic resin was prepared and immersed in four types of denture cleansers after there staining with tea then color stability, water sorption and water solubility of acrylic resin was measured.There were no changes in the stained acrylic properties when the samples were immersed in prepared denture cleansers and in the alkaline peroxide cleanser compared to that immersed in the distilled water in respect to color stability, sorption and solubility of the testing groups.The water sorption, water solubility and color stability of the light cured acrylic resin where immersed in the prepared denture cleanser solutions are in accordance with the American dental association no.12. The denture cleanser are good and satisfactory cleanser materials for the acrylic resin denture base and it’s recommended for cleansing the prostheses which are cured by light curing method.


Article
The effect of denture cleansers on surface roughness and microhardness of stained light cured denture base material Dr

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Abstract

Denture cleanser is the most widely used method by the patients to maintain clean and healthy denture but the prolong use of such cleansers may affect the properties of the denture. So the aim of our study is to observe the effect of denture cleansers on surface hardness and surface roughness of the light cured acrylic resin after their immersion in the tea solution.Light curing acrylic resin was prepared and immersed in four types of denture Cleansers after there staining with tea then surface hardness and surface roughness of the acrylic resin was measured.There is no change in the stained acrylic properties when the samples were immersed in the denture cleansers compared to that immersed in the distilled water.The prepared denture cleanser solutions are good and satisfactory cleanser materials for the acrylic resin denture base. It’s recommended to use the denture cleanser for cleansing the prostheses which cured by light curing method.IntroductionThe microporous surface

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