Hajtó Jan, Marinescu Costin
Eur J Esthet Dent. 2012 Autumn;7(3):282-94.
Porcelain laminate veneer restorations are much thinner than other types of restorations such as crowns or onlays. Within the range of 0.3 to 1.5 mm, it is not an easy task for the clinician to provide the appropriate clearance for the ideal restoration and, concurrently, for the dental technician to predictably create a piece of imitated nature. The advantages of enamel preservation and the principle of nil nocere imply removing as little tooth structure as possible for the purpose of maintaining tooth health, its mechanical strength and ensure the treatment's long-term predictability. There has to be a balance between the requirements of reduction clearance, which will enable the technician to achieve the desired esthetic result, and the minimally invasive principles of dentistry. With laminate veneer cases, there might be areas of variable ceramic thickness that can create esthetic problems. These will be hard to correct during cementation and will also be clearly visible to the patient. Clinical cases are presented here to outline this type of problem.
瓷贴面修复体比其他类型的修复体（如全冠或嵌体）要薄得多。在0.3至1.5毫米的范围内，临床医生要为理想的修复提供合适的间隙并非易事，同时，对于牙科技师来说，要可预测地制作出逼真的修复体也并非易事。保留牙釉质的优点以及“不伤害原则”意味着为保持牙齿健康、其机械强度并确保治疗的长期可预测性，应尽可能少地去除牙体组织。在能够使技师获得理想美学效果的预备间隙要求与牙科微创原则之间必须取得平衡。对于瓷贴面病例，可能存在陶瓷厚度可变的区域，这会产生美学问题。这些问题在粘结过程中很难纠正，而且患者也会明显看到。本文展示临床病例以概述这类问题。
