Conservative Dentistry and Endodontics, Government Dental College and Hospital, Mumbai, India.
Med Princ Pract. 2014;23(1):40-4. doi: 10.1159/000355607. Epub 2013 Nov 9.
To study and compare the effects of dental amalgam and composite restorations on human dental pulp.
One hundred sound premolars scheduled for orthodontic extraction were divided equally into two groups: group A, teeth restored with silver amalgam, and group B, teeth restored with composite resin. Each group was equally subdivided into two subgroups [extracted after 24 h (A-1 and B-1) or 7 days (A-2 and B-2)], and the histological changes in the pulp related to the two different materials at the two different intervals were studied.
It was found that after 24 h, the inflammatory response of the pulp in teeth restored with amalgam and composite was similar (p = 1.00). However, after 7 days, the severity of the inflammatory response of the pulp in teeth restored with amalgam was less compared to that in teeth restored with composite (p = 0.045).
This study confirmed that amalgam continues to be the mechanically as well as biologically more competent restorative material. Composite could be a promising restorative material to satisfy esthetic needs for a considerable period of time. However, its biological acceptance is still in doubt.
研究和比较汞合金和复合树脂修复对人牙髓的影响。
100 颗正畸拔除的健康前磨牙均分为两组：A 组，用银汞合金修复；B 组，用复合树脂修复。每组又均分为 2 个亚组[分别在 24 小时（A-1 和 B-1）或 7 天后（A-2 和 B-2）拔出]，研究两种不同材料在两个不同时间段对牙髓的组织学变化。
发现，24 小时后，用汞合金和复合树脂修复的牙齿的牙髓炎症反应相似（p = 1.00）。然而，7 天后，用汞合金修复的牙齿的牙髓炎症反应的严重程度低于用复合树脂修复的牙齿（p = 0.045）。
本研究证实，汞合金仍然是机械和生物学性能更优越的修复材料。复合树脂在相当长的一段时间内可能是一种有前途的满足美观需求的修复材料。但其生物相容性仍存在疑问。
