Kasina Sitaram Prasad, Ajaz Tarannum, Attili Sirisha, Surapaneni Hemchand, Cherukuri Muralikrishna, Srinath H P
Department of Prosthodontics, St. Joseph Dental College, Duggirala, Eluru, Andhra Pradesh, India.
Department of Prsothodontics, Purvanchal Institute of Dental Sciences, Gida, Gorakhpur, Uttar Pradesh, India.
J Int Oral Health. 2014 Feb;6(1):72-7. Epub 2014 Feb 26.
The aim of this study was to evaluate and compare the porosities in the mandibular acrylic denture bases processed by heat and microwave polymerization techniques, using two different brands of commercially available denture base resins.
MATERIALS & METHODS: Two brands of heat activated denture base resins, DPI plain and Acralyn H cross linked denture base resins designed for conventional water bath polymerization, were used to prepare 48 test specimens of mandibular acrylic denture bases. The test specimens were processed using one cycle of conventional water bath polymerization and one cycle of microwave polymerization. The absolute density of acrylic resin was used to calculate the percent mean porosity of each mandibular acrylic denture base by use of various equations.
Anova analysis reveals highly significant difference between mean percent porosity values of whole denture bases of all groups. Statistics reveals that heat polymerized groups have lesser mean percent porosity values than microwave polymerized groups. It also reveals that denture bases processed with Acralyn H cross linked denture base resin have lesser mean percent porosity values than denture bases processed with DPI Plain denture base resin.
Specimens processed with Acralyn H cross linked denture base resin by conventional heat polymerization technique has the least mean percent porosity and specimens processed with DPI Plain denture base resin by microwave polymerization technique has the highest mean percent porosity. How to cite the article: Kasina SP, Ajaz T, Attili S, Surapaneni H, Cherukuri M, Srinath HP. To evaluate and compare the porosities in the acrylic mandibular denture bases processed by two different polymerization techniques, using two different brands of commercially available denture base resins - an in vitro study. J Int Oral Health 2014;6(1):72-7.
本研究的目的是评估和比较使用两种不同品牌市售义齿基托树脂，通过热聚合法和微波聚合法加工的下颌丙烯酸义齿基托的孔隙率。
使用两种品牌的热固化义齿基托树脂，即用于传统水浴聚合的DPI普通型和Acralyn H交联型义齿基托树脂，制备48个下颌丙烯酸义齿基托测试标本。测试标本分别采用一个传统水浴聚合周期和一个微波聚合周期进行加工。通过各种公式，使用丙烯酸树脂的绝对密度来计算每个下颌丙烯酸义齿基托的平均孔隙率百分比。
方差分析显示，所有组全口义齿基托的平均孔隙率百分比值之间存在高度显著差异。统计学表明，热聚合组的平均孔隙率百分比值低于微波聚合组。还表明，用Acralyn H交联型义齿基托树脂加工的义齿基托的平均孔隙率百分比值低于用DPI普通型义齿基托树脂加工的义齿基托。
采用传统热聚合法用Acralyn H交联型义齿基托树脂加工的标本平均孔隙率百分比最低，而采用微波聚合法用DPI普通型义齿基托树脂加工的标本平均孔隙率百分比最高。如何引用本文：卡西纳SP、阿贾兹T、阿蒂利S、苏拉帕内尼H、切鲁库里M、斯里纳特HP。使用两种不同品牌市售义齿基托树脂，通过两种不同聚合技术评估和比较丙烯酸下颌义齿基托的孔隙率——一项体外研究。《国际口腔健康杂志》2014年；6(1):72 - 7。
