光聚合模式對樹脂聚合度與軟化程度之影響

Effect of curing protocol on degree of conversion and softening of light-curing polymers

許璧伃(Pi-Yu Hsu)

指導教授 ： 洪純正

高雄醫學大學/口腔醫學院/牙醫學研究所/碩士(2012年)

https://doi.org/10.6832/KMU.2012.00097

摘要

光聚合樹脂在牙科的應用佔有重要的角色，本研究目的是探討不同光照模式對複合樹脂之聚合度、硬度，與樹脂軟化程度之影響。實驗設計四種不同光照模式：低強度連續照射、高強度連續照射、ramp curing technique和pulse-delay curing technique來照射樹脂。利用傅立葉紅外線吸收光譜儀計算其聚合度。使用微硬度測試機測試樹脂硬度與浸泡酒精後軟化的情形。用SPSS統計軟體以one-way ANOVA和相關分析來探討不同照射模式之間的差異。結果發現pulse-delay curing technique在樹脂底面聚合度較差。而低強度連續照射其底面的硬度值最低。樹脂被酒精軟化程度最少的為ramp curing technique，亦即有最強的交聯結構。結論是使用ramp curing technique可以得到最好的聚合度、硬度，與交聯結構。

關鍵字

聚合模式 ； 複合樹脂 ； 傅立葉紅外線吸收光譜儀 ； 聚合度 ； 微硬度 ； 樹脂軟化 ； 交聯結構

並列摘要

Objective. The purpose of this study was to investigate the effect of light-curing protocol on degree of conversion (DC), and softening of dental composite polymers.
Methods. Different curing-protocols were used to investigate the influence of power density and mode of cure on the properties. The modes of cure were continuous with different power intensity, ramp, and pulse-delay irradiation. Degree of conversion was measured by Fourier transform infrared spectroscopy (FTIR). Softening of composite polymers was measured with microhardness before and after ethanol storage. Data were submitted to one-way ANOVA, and correlation analysis with SPSS software.
Results. Modes of cure influenced the degree of conversion, microhardness and softening of the polymer. Pulse-delay mode has lower degree of conversion on the bottom of resin. Compare lower power density in continuous mode to other curing modes: lower power density in continuous mode resulted in decreased microhardness of bottom surfaces. Ramp-curing mode has the least softening of composite resin.
Conclusion. The ramp curing mode has the best overall performances of degree of conversion, microhardness and softening in ethanol.

並列關鍵字

curing modes ； dental polymers ； FTIR ； degree of conversion ； microhardness ； softening of composite resin ； crosslinking

參考文獻

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