Newman S M
Division of Biomaterials, School of Dentistry, University of Colorado, Denver 80262.
J Am Dent Assoc. 1991 Aug;122(8):67-71. doi: 10.14219/jada.archive.1991.0246.
I have not discussed the full veneer restoration of metals or ceramics. These are costly services-between four and six times amalgam's cost. No clinical evidence supports longevity much greater than amalgam. Full veneer restoration requires significant reduction of tooth structure and may also require a buildup for appropriate retention. A buildup requirement again debates the question of alternative to amalgam. Full cast restorations have not been discussed as legitimate alternatives, though partial veneers would be equivalent to onlay procedures. Full veneer procedures are better suited to significant reconstructions of tooth structure, and only then when there can be some expectation of home care by the patient. Dr. Miles Markley extolled the use of amalgam during his career. He was innovative in creating extremely conservative preparations, and the placement procedures for quality amalgam restorations. He stated: "Amalgam is the standard." All techniques for single tooth restoration, whether esthetic or not, could stand a comparison to this standard. There are materials and techniques that begin to compare well with amalgam. No one material or technique fits all the needs amalgam has fulfilled, but some can begin to compete.
我尚未讨论金属或陶瓷全冠修复。这些都是成本高昂的治疗——费用是银汞合金的四到六倍。没有临床证据表明其使用寿命比银汞合金长得多。全冠修复需要大量磨除牙体组织,可能还需要进行桩核修复以确保合适的固位。桩核修复的需求再次引发了银汞合金替代品的问题。全冠修复虽然未被视为合理的替代方案,但部分冠修复相当于嵌体修复。全冠修复更适合对牙体组织进行重大修复,并且只有在患者有望进行一定家庭护理的情况下才适用。迈尔斯·马克利博士在其职业生涯中推崇使用银汞合金。他在创造极其保守的预备方法以及高质量银汞合金修复体的放置程序方面富有创新精神。他说:“银汞合金是标准。”所有单颗牙修复技术,无论是否美观,都可以与这个标准进行比较。有些材料和技术已开始能与银汞合金相媲美。没有一种材料或技术能满足银汞合金所满足的所有需求,但有些已开始具有竞争力。