Cernei E R, Maxim Dana Cristiana, Zegan Georgeta
Rev Med Chir Soc Med Nat Iasi. 2016 Oct-Dec;120(4):932-41.
The purpose of this study was to investigate if high values of DMFT/dmft indices constitute risk factors for installation in various types of malocclusions in mixed dentition.
The study consisted of 600 study-cast with mixed dentitions coming from the children in northeastern Romania. WHO (World Health Organization) dental caries criteria were applied to both groups. The existence of an increased caries risk was deducted from the dmft (decay, missed, filled temporary teeth) and DMFT (Decay, Missed, Filled Teeth) indices related to age. Malocclusion was classified in the three planes in accordance with the major symptom. The statistical study was conducted in SPSS 16.0 for Windows. The risk factors we have identified through calculating the odds ratio and relative risk.
Mean value dmft/DMFT (index in mixed dentition was found 3.64±2.686. The highest values of the dmft/DMFT indices were found in patients with normal overjet (4.73± 2.892) and normal overbite (4.04±2.781). In the transverse plane, the lowest value of DMFT/dmft index was recorded in patients with spacing (2.63±1.915), and the highest values were observed in patients with the combined diagnosis of crowding and lateral cross bite (4.97±3.010) respectively of crowding and spacing (4.65 ±2.792).The presence of malocclusions in the three plans is not influenced by increased DMFT/dmft index (DMFT/dmft>5) unless combined diagnoses of crowding and lateral cross bite, and crowding and spacing where the relative risks are over 2.5.
The present study concluded that the prevalence of dental caries in children with mixed dentition is higher in patients with normal overjet and overbite. In terms of the risk of developing a certain malocclusion with dental crowding associate with lateral cross bite, respectively dental crowding associate false spacing are present under a high caries activities.
本研究旨在调查DMFT/dmft指数的高值是否构成混合牙列中各类错牙合畸形矫治的风险因素。
本研究包括来自罗马尼亚东北部儿童的600例混合牙列研究模型。两组均采用世界卫生组织（WHO）的龋齿标准。根据与年龄相关的dmft（龋、失、补乳牙）和DMFT（龋、失、补牙）指数推断患龋风险增加的情况。根据主要症状将错牙合畸形在三个平面上进行分类。在Windows系统的SPSS 16.0中进行统计学研究。我们通过计算比值比和相对风险来确定风险因素。
发现混合牙列中dmft/DMFT的平均值（指数）为3.64±2.686。dmft/DMFT指数的最高值出现在覆盖正常（4.73±2.892）和覆牙合正常（4.04±2.781）的患者中。在横向平面上，间隙患者的DMFT/dmft指数最低（2.63±1.915），而拥挤合并侧方反牙合（4.97±3.010）以及分别为拥挤和间隙（4.65±2.792）的联合诊断患者中观察到最高值。除非是拥挤合并侧方反牙合以及拥挤和间隙的联合诊断（相对风险超过2.5），三个平面上错牙合畸形的存在不受DMFT/dmft指数升高（DMFT/dmft>5）的影响。
本研究得出结论，覆盖和覆牙合正常的混合牙列儿童患龋率更高。就发生伴有侧方反牙合的牙列拥挤或伴有间隙的牙列拥挤等特定错牙合畸形的风险而言，在高龋病活动情况下会出现。
