Babu Mandava Ramesh, Rao C Satyanageswar, Ahmed Syed Tauqheer, Bharat J S V, Rao N Venugopal, Vinod V
Department of Conservative dentistry & Endodontics, Drs. Sudha & Nageswara Rao Siddhartha Institute of Dental Sciences, Chinnoutupalli, Andhra Pradesh, India.
Department of Prosthodontics, Hi-Tech Dental College, Bhubaneswar, Orissa, India.
J Int Oral Health. 2014 Apr;6(2):68-75. Epub 2014 Apr 26.
The aim of this study is to evaluate the dimensional accuracy of heat polymerized PMMA denture base clamped by the conventional method and by R.S technique and cured by a different curing cycle.
MATERIALS & METHODS: In this study, a total of 40 standardized maxillary record bases were fabricated with seven reference points: Point A - Incisive papilla, Point B & C - Canine region on either side, Point E & G - Midpoint of tuberosities on either side, Point F- Midpoint of the line joining the two tuberosities, Point D- Midpoint between the line joining A and F. Group A: Ten maxillary record bases were fabricated by conventional clamping method and cured by long curing cycle. Group A1: Ten maxillary record bases were fabricated by R.S tension clamping method and cured by long curing cycle. Group B: Ten maxillary record bases were fabricated by conventional clamping method and cured by short curing cycle. Group B1: Ten maxillary record bases were fabricated by R.S tension clamping method and cured by short curing cycle. The distances between the reference points i.e. A-B, A-C, A-D, D-F, B-E, C-G, E-F, F-G, B-D, D-G, CD, D-E of all three thermoplastic denture base plates were measured and recorded with the help of a travelling microscope and were used for comparison with the measured and recorded readings of processed acrylic denture bases. The data obtained was analyzed by using the One Way Analysis of Variance.
The overall results of the in vitro study indicate that among all the PMMA bases cured by the two clamping systems and the different curing cycle, group A was the most dimensionally stable, followed by control group A, then followed by B and B was most unstable.
The study concluded that the denture bases fabricated by the R.S Technique using the long curing cycle would produce the most dimensionally stable PMMA denture bases. How to cite the article: Babu MR, Rao CS, Ahmed ST, Bharat JS, Rao NV, Vinod V. A comparative evaluation of the dimensional accuracy of heat polymerised PMMA denture base cured by different curing cycles and clamped by R S technique and conventional method - An In-vitro study. J Int Oral Health 2014;6(2):68-75.
本研究旨在评估采用传统方法和R.S技术夹紧并通过不同固化周期固化的热聚合PMMA义齿基托的尺寸精度。
在本研究中，共制作了40个标准化的上颌记录基托，设有七个参考点：A点 - 切牙乳头，B点和C点 - 两侧尖牙区，E点和G点 - 两侧结节中点，F点 - 连接两个结节的线的中点，D点 - 连接A和F的线的中点。A组：通过传统夹紧方法制作10个上颌记录基托，并采用长固化周期固化。A1组：通过R.S张力夹紧方法制作10个上颌记录基托，并采用长固化周期固化。B组：通过传统夹紧方法制作10个上颌记录基托，并采用短固化周期固化。B1组：通过R.S张力夹紧方法制作10个上颌记录基托，并采用短固化周期固化。借助移动显微镜测量并记录所有三种热塑性义齿基托板参考点之间的距离，即A - B、A - C、A - D、D - F、B - E、C - G、E - F、F - G、B - D、D - G、C - D、D - E，并用于与加工后的丙烯酸义齿基托的测量和记录读数进行比较。使用单因素方差分析对获得的数据进行分析。
体外研究的总体结果表明，在通过两种夹紧系统和不同固化周期固化的所有PMMA基托中，A组尺寸最稳定，其次是对照组A，然后是B组，B组最不稳定。
该研究得出结论，采用R.S技术并使用长固化周期制作的义齿基托将产生尺寸最稳定的PMMA义齿基托。如何引用本文：Babu MR, Rao CS, Ahmed ST, Bharat JS, Rao NV, Vinod V. 不同固化周期固化并采用R.S技术和传统方法夹紧的热聚合PMMA义齿基托尺寸精度的比较评估 - 一项体外研究。《国际口腔健康杂志》2014年；6(2):68 - 75。
