Odor and deterioration characteristics of denture base resins.

尽管诸如义齿基托树脂之类的牙科树脂可能是呼吸异味的主要原因，但在假牙基托树脂和其他牙科树脂材料变质过程中，有一些关于变色和气味特征的报道。本研究的目的是研究丙烯酸基托树脂和聚砜基托树脂的气味特性和降解情况。研究了光活化恢复性复合树脂和用于恢复性树脂遮光改性的涂漆树脂的劣化与光学性能的关系。用电气味计和引起呼吸异味的主要原因甲基硫醇溶液测定了气味特征。利用光谱透射率计和数字色度计测量了其光学特性和颜色特性。结果表明：(1)义齿基托树脂的气味值随甲基硫醇溶液浸泡时间的延长而增加；(2)气味特征与变色特征之间存在显著的高度相关；(3)临床光固化装置的辐射光特性显著影响修复复合树脂和涂漆树脂的力学性能和变色特征。我们的结果表明，测量树脂的气味特征和光学性质可能是一种简单而有用的方法来检查树脂的劣化。

There are a few reports concerning discoloration and odor characteristics during deterioration of denture base resins and other dental resin materials, although dental resins such as a denture base resin may be a major cause of breath malodor. The purpose of this study was to investigate the odor characteristics and deterioration of acrylic and polysulfone denture base resins. The relationship between the deterioration and optical properties of light-activated restorative composite resins and paint-on resins for shade modification of restorative resins were also examined. The odor characteristics were measured with an electrical odor meter and methlmercaptan solution which was a major cause of breath malodor. The optical properties and color characteristics were measured using a spectral transmittance meter and a digital chroma meter. The results obtained were, (1)the values of odor of denture base resins increased with increasing period for immersion in the methlmercaptan solution, (2)there was significant high relationship between the odor characteristics and discoloration characteristics, (3)the mechanical properties and discoloration characteristics of restorative composite resins and paint-on resins were significantly influenced by the radiation light characteristics of clinical light-curing units. Our results indicated that measurements of the odor characteristics and optical properties of resin may be a simple and useful method for examining the deterioration of the resin.