Department of Prosthodontics, Can Tho University of Medicine and Pharmcay, Can Tho, Vietnam.
Int J Prosthodont. 2011 Jan-Feb;24(1):30-7.
The aim of this study was to explore the dental functional status of a Southern Vietnamese adult population using a new quantitative- and qualitative-based classification system.
The sample consisted of 2,809 dentate subjects aged ⋝ 20 years from urban and rural areas of Southern Vietnam. Dentitions were classified by a dichotomized five-level step-by-step branching hierarchy reflecting functionality. Cut-offs were as follows: level I (dentition level) = 1 tooth present in each arch, level II (arch level) = 10 teeth in each arch, level III (anterior region) = all 12 anterior teeth present, level IV (premolar region) = ⋝ 3 premolar posterior opposing pairs (POPs) present, and level V (molar region) = 1 molar POP bilaterally.
Of the 2,809 subjects, 44% met all criteria for a functional dentition and 16% met none. Of subjects meeting level II, 81% had a complete anterior region, 74% had a sufficient premolar region, and 66% had a sufficient molar region. For subjects not meeting level II, these figures were 9%, 15%, and 8%, respectively. For patients meeting level II who were between 20 and 35 years of age, a mean 29.2 ± 2.4 teeth and 7.9 ± 2.1 POPs were present; subjects 65 years of age and older had a mean 25.6 ± 3.2 teeth and 5.9 ± 2.1 POPs. For patients not meeting level II, these numbers were 18.6 ± 2.9 teeth and 3.1 ± 1.8 POPs and 12.8 ± 5.4 teeth and 0.9 ± 1.4 POPs for 20- to 35-year-olds and those 65 years of age and older, respectively. Intraclass correlation coefficients for number of teeth and POPs showed fair to good group homogeneities.
The World Health Organization goal of retaining at least 20 teeth throughout life is not achieved in Southern Vietnam; above the age of 44, less than 75% of subjects presented with 20 or more teeth. The presented classification system is a useful framework for mapping the functionality of dentitions by applying additional criteria for dental regions.
本研究旨在使用新的定量和定性分类系统探索越南南部成年人群的口腔功能状况。
该样本由来自越南南部城乡地区的 2809 名 20 岁以上的有牙颌患者组成。牙列通过反映功能的二分类五级逐步分支层次结构进行分类。截止点如下:水平 I(牙列水平)= 每弓 1 颗牙,水平 II(弓水平)= 每弓 10 颗牙,水平 III(前牙区)= 所有 12 颗前牙存在,水平 IV(前磨牙区)= ⋝ 3 个前磨牙后对(POPs)存在,水平 V(磨牙区)= 双侧 1 个磨牙 POP。
在 2809 名受试者中,44%符合功能性牙列的所有标准,16%不符合任何标准。在符合水平 II 的受试者中,81%具有完整的前牙区,74%具有足够的前磨牙区,66%具有足够的磨牙区。对于不符合水平 II 的受试者,这些数字分别为 9%、15%和 8%。对于符合水平 II 且年龄在 20 至 35 岁之间的患者,平均有 29.2 ± 2.4 颗牙和 7.9 ± 2.1 个 POP;65 岁及以上的患者平均有 25.6 ± 3.2 颗牙和 5.9 ± 2.1 个 POP。对于不符合水平 II 的患者,这些数字分别为 18.6 ± 2.9 颗牙和 3.1 ± 1.8 个 POP 和 12.8 ± 5.4 颗牙和 0.9 ± 1.4 个 POP,分别用于 20 至 35 岁和 65 岁及以上的患者。牙齿和 POP 数量的组内相关系数显示出良好的群体同质性。
在越南南部,世界卫生组织保留至少 20 颗牙齿终生的目标并未实现;44 岁以上人群中,不到 75%的患者拥有 20 颗或更多牙齿。所提出的分类系统是一种通过对牙齿区域应用额外标准来映射牙列功能的有用框架。