Smedberg J I, Ekenbäck J, Lothigius E, Arvidson K
Department of Prosthetic Dentistry, St Erik Hospital, Stockholm, Sweden.
Int J Prosthodont. 1998 Mar-Apr;11(2):145-9.
The aim of this prospective study was to determine whether a machine-fabricated titanium fixed partial denture veneered with a low-temperature fused porcelain is an acceptable treatment modality.
The study originally included 25 patients with 37 fixed partial dentures of three to seven units, with a total of 151 units including 98 abutments. A clinical examination using the California Dental Association quality evaluation system and radiologic examination and registration of complications was conducted at the time of insertion and after 1 and 2 years.
After 2 years, 123 units (including 80 abutments) remained for examination. Twenty-eight units (including 18 abutments) were lost during the follow-up period. The losses were because of drop-out (eight cases), root fracture (two cases), caries (six cases), and periodontitis (two cases). One fixed partial denture fractured after 18 months and was therefore remade. In all, porcelain fractures occurred in two patients, both with severe parafunctional habits. At baseline, the California Dental Association rating system for marginal integrity was "excellent" for 72 abutments and "acceptable" for 26 abutments. At the 2-year follow-up the corresponding rating was "excellent" for 46 abutments, "acceptable" for 30 abutments, and "not acceptable" for four abutments. The latter marginal defects were corrected with restorations. For surface and color the corresponding ratings were "excellent" for 137 units and "acceptable" for 14 units at baseline, and "excellent" for 80 units and "acceptable" for 43 units at the 2-year follow-up. Bleeding index increased from 24% at baseline to 33% after 2 years.
The study confirms that for an observation period of 2 years, fixed partial dentures made by the Procera method seem to be an acceptable treatment modality. They are a suitable alternative to fixed partial dentures with porcelain fused to high-noble alloys.
本前瞻性研究的目的是确定用低温熔结瓷贴面的机制钛固定局部义齿是否是一种可接受的治疗方式。
该研究最初纳入了25例患者，共37个三至七个单位的固定局部义齿，总共151个单位，包括98个基牙。在义齿植入时以及1年和2年后，使用加利福尼亚牙科协会质量评估系统进行临床检查，并进行放射学检查和并发症记录。
2年后，剩余123个单位（包括80个基牙）可供检查。在随访期间有28个单位（包括18个基牙）缺失。缺失原因包括失访（8例）、牙根折断（2例）、龋齿（6例）和牙周炎（2例）。一副固定局部义齿在18个月后折断，因此重新制作。总共有2例患者出现瓷折裂，均有严重的副功能习惯。基线时，加利福尼亚牙科协会边缘完整性评级系统中，72个基牙为“优秀”，26个基牙为“可接受”。在2年随访时，相应评级为46个基牙“优秀”，30个基牙“可接受”，4个基牙“不可接受”。后者的边缘缺陷通过修复进行了纠正。对于表面和颜色，基线时相应评级为137个单位“优秀”，14个单位“可接受”，2年随访时为80个单位“优秀”，43个单位“可接受”。出血指数从基线时的24%增加到2年后的33%。
该研究证实，在2年的观察期内，采用Procera方法制作的固定局部义齿似乎是一种可接受的治疗方式。它们是高贵金属合金烤瓷固定局部义齿的合适替代方案。
