Abstract

研究目的:本研究之目的在探討快速光聚合機(Bluelight Pro)及傳統鹵素光機,在照射 compomer後其聚合程度及硬度之差異。方法:本研究以Compomer作為填補之材料,分別製作1 mm, 2mm至3mm厚度之壓克力模型3種。各種厚度之模型各分三組,每組5個。分別以Bluelight Pro及另外二種傳統鹵素光機 (Optilux, Elipar)照射20秒、40秒及60秒。照射距離固定。而後在每一壓克力模型之Compomer 標本上取3點,以Vicker's microhardness tester測試其硬度。將各組測試之結果加以統計,並以Student's t test來分析各組結果之差異性。 結果:在1 mm的標本中,三種光源皆要照射達40秒,才能使補綴物底部之硬度與表層相當(即 hardness ratio達到0.9以上)。在2mm厚度時,只有Optilux在40秒照射時可達到Hardness ratio 0.9以上。Blue light及Elipar照射時間達60秒時Hardness ratio才能達到0.9以上。而3mm厚度時,即使在60秒的照射時間,三種光源之Hardness ratio仍無法達到0.9以上。結論:Bluelight Pro並未如廠商所言,在短短5秒鐘內,就可將厚度2mm之補綴物完全聚合。仍需如一般傳統鹵素光機照射40秒。無論何種鹵素光機,光照時間至少需40秒才可將厚度 l mm之補綴物完全聚合。光照時間之長短,確實影響樹脂聚合之程度。而光源強度也是一個相當重要之因素。

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