Odén A, Andersson M, Krystek-Ondracek I, Magnusson D
Department of Dental Biomaterials Science, Karolinska Institute, Huddinge, Sweden.
J Prosthet Dent. 1998 Oct;80(4):450-6. doi: 10.1016/s0022-3913(98)70010-1.
Esthetic demands of patients and practitioners for an all-ceramic crown in both anterior and posterior regions of the dental arches has prompted the development of the Procera AllCeram crown. Long-term clinical trials that evaluate the strength and naturalness of the Procera AllCeram crown are lacking.
This prospective study was initiated to evaluate the clinical performance of 100 Procera AllCeram crowns after 5 years in service.
One hundred Procera AllCeram crowns were fabricated for 58 patients (20 men and 38 women). Patients were treated by 4 general dental practitioners. Crown placement involved both the anterior and posterior regions of the dental arches. Crowns were examined at baseline and once a year during the 5 years that followed and evaluated at each appointment with the California Dental Association's quality assessment system.
Of the 97 crowns remaining in the study after 5 years, only 3 crowns had experienced a fracture through the veneering porcelain and the aluminum oxide coping material. Two additional crowns were replaced as a result of fractures of only the veneering porcelain. One crown was replaced as a result of recurrent caries. All remaining crowns were ranked as either excellent or acceptable for surface/color, anatomic form, and marginal integrity.
The 5-year clinical observations and ranking with the California Dental Association's quality assessment criteria supported the conclusion that Procera AllCeram crowns may be used in all areas of the mouth.
患者和从业者对牙弓前后区域全瓷冠的美学需求推动了Procera全瓷冠的发展。目前缺乏评估Procera全瓷冠强度和逼真度的长期临床试验。
本前瞻性研究旨在评估100颗Procera全瓷冠使用5年后的临床性能。
为58例患者（20名男性和38名女性）制作了100颗Procera全瓷冠。由4名普通牙科医生对患者进行治疗。牙冠修复涉及牙弓的前后区域。在基线时对牙冠进行检查，并在随后的5年中每年检查一次，每次检查时使用加利福尼亚牙科协会的质量评估系统进行评估。
5年后仍在研究中的97颗牙冠中，只有3颗牙冠的饰面瓷和氧化铝基底材料发生了断裂。另外有2颗牙冠因仅饰面瓷断裂而被更换。有1颗牙冠因继发龋而被更换。所有其余牙冠在表面/颜色、解剖形态和边缘完整性方面的评级均为优秀或可接受。
5年的临床观察以及根据加利福尼亚牙科协会的质量评估标准进行的评级支持以下结论：Procera全瓷冠可用于口腔的所有区域。
