Lumley P J, Fisher F J
Conservation Unit, School of Dentistry, Birmingham, UK.
J Dent. 1995 Aug;23(4):213-5. doi: 10.1016/0300-5712(95)91185-p.
The purpose of this study was to investigate the long-term performance of tunnel restorations.
Thirty-three glass polyalkenoate (ionomer) or cermet restorations were placed in the premolar or first molar teeth of 25 patients. Conservative amalgam control restorations were the means of treatment in 14 similar teeth of the same group. Review as to performance consisted of a regular clinical and radiographic examination and the criteria for failure were recurrent caries, fracture of the marginal ridge or gross loss of restorative material.
After 3 years all types of restoration were satisfactory. By approximately 5 years one-quarter of the glass ionomer and 10% of the cermet restorations had failed. All the failures after any period of service could be replaced by conservative amalgam fillings. None of the controls required replacement.
While tunnel restorations employing glass ionomer material and the cermet variant do enjoy a degree of success, this preliminary work suggests that small restorations of dental amalgam are more successful in the long term.
本研究旨在调查隧道式修复体的长期性能。
在25名患者的前磨牙或第一磨牙中放置了33个玻璃聚烯酸酯（离子体）或金属陶瓷修复体。在同一组14颗相似牙齿中采用保守的银汞合金对照修复体作为治疗手段。对修复体性能的评估包括定期的临床和影像学检查，失败标准为继发龋、边缘嵴折断或修复材料大量丧失。
3年后，所有类型的修复体情况均令人满意。到大约5年时，四分之一的玻璃离子体修复体和10%的金属陶瓷修复体出现失败。在任何使用期后的所有失败修复体都可用保守的银汞合金充填物替代。对照修复体无一需要更换。
虽然采用玻璃离子体材料和金属陶瓷变体的隧道式修复体确实取得了一定程度的成功，但这项初步研究表明，从长期来看，小型银汞合金修复更为成功。
