Löfquist L, Bergendal B, Hugoson A
The Institute for Postgraduate Dental Education, Jönköping, Sweden.
Swed Dent J. 2000;24(3):93-103.
The aim of the study was to assess the prevalence of fixed prostheses, i.e. single crowns and fixed partial dentures, in adults 20-80 years old in two cross-sectional studies carried out in 1983 and 1993 and to analyse whether the choice of material for fixed prostheses had changed during this time period. The material comprised 586 and 593 individuals. A descriptive analysis of number of individuals with fixed prostheses was made concerning the number of crowns and pontics, the distribution in the jaws, and the materials used. The prevalence of individuals with fixed prostheses was shown to increase with age both in 1983 and 1993. In 1993 the number of individuals with fixed prostheses was slightly lower than in 1983 (44 and 48 percent respectively). There was no difference according to gender. The proportion of individuals with fixed prostheses was lower or almost unchanged in the 20-, 30-, 40-, 50-, 60-, and 80-year-olds in 1993 compared to 1983. In the 70-year-olds, however, the proportion of individuals with fixed prostheses was considerably higher in 1993 compared to 1983. Most individuals with fixed prostheses had a small number of crowned teeth, and about half of the individuals had not more than four crowned teeth. Likewise most individuals with pontics had a small number of pontics. The distributions of crowned teeth and pontics in the jaws were similar in 1983 and 1993. Pontics and crowns were more frequent in the upper than in the lower jaw. Crowns made of porcelain or metal ceramic had increased by 1993 in the 30-80 year age groups, and the study thus confirms general clinical experience that porcelain and metal ceramic are more often the materials of choice in fixed prosthodontics in adults today.
该研究的目的是在1983年和1993年进行的两项横断面研究中，评估20至80岁成年人中固定修复体（即单冠和固定局部义齿）的患病率，并分析在此期间固定修复体材料的选择是否发生了变化。研究对象包括586名和593名个体。对拥有固定修复体的个体数量进行了描述性分析，内容涉及牙冠和桥体的数量、在颌骨中的分布以及所使用的材料。结果显示，1983年和1993年拥有固定修复体的个体患病率均随年龄增长而升高。1993年拥有固定修复体的个体数量略低于1983年（分别为44%和48%）。按性别划分无差异。与1983年相比，1993年20岁、30岁、40岁、50岁、60岁和80岁人群中拥有固定修复体的个体比例降低或几乎未变。然而，与1983年相比，1993年70岁人群中拥有固定修复体的个体比例显著更高。大多数拥有固定修复体的个体牙冠数量较少，约一半个体的牙冠数量不超过四颗。同样，大多数拥有桥体的个体桥体数量也较少。1983年和1993年牙冠和桥体在颌骨中的分布相似。桥体和牙冠在上颌比在下颌更常见。到1993年，30至80岁年龄组中由瓷或金属陶瓷制成的牙冠有所增加，因此该研究证实了一般临床经验，即如今瓷和金属陶瓷在成人固定义齿修复中更常被选作材料。
