Filipović Gordana, Janosević Mirjana, Stosić Maja
Medicinski fakultet Nis, Klinika za stomatologiju, Odeljenje za ortopediju vilica.
Med Pregl. 2010 May-Jun;63(5-6):343-8. doi: 10.2298/mpns1006343f.
A certain ratio of maxillary to mandibular tooth size is very important for the proper occlusion formation. In regular occlusion, the teeth must be proportional to size. A discrepancy in tooth size between the mandibular and maxillary arch is usually the cause of disharmonious occlusion ratios. One of the most widespread methods in determining of discrepancy in tooth size between the upper and lower jaw is the Bolton analysis of mesiodistal width of permanent teeth.
The subjects of both sexes with the permanent dentition and occlusive ratio of Angle Class I classification had had the precise impressions taken on the basis of which the study models were obtained. 60 patients were selected for this investigation (30 males and 30 females) according to the following criteria: the presence of completely erupted teeth of permanent dentition from the first molar on one side to the first molar on the other side of the dental string; good quality of the study models; the absence of mesiodistal and occlusive abrasion, caries lesions, Class II fillings; the absence of prosthetic or composite restoration;the absence of anomalies in regard to shapes, structures and tooth development. We measured the mesiodistal width of each tooth from the first molar on one side to the first molar on the other side, from the mesial contact point to the distal contact point with the greatest interproximal distance.
The obtained results for mesiodistal tooth width of the right and left side do not show statistically significant differences. The mean values of the Bolton anterior ratio showed neither the sexual dimorphism nor did the mean values of the Bolton total ratio show any differences in sexes. The mean values of the Bolton anterior ratio in our examinees of both sexes are significantly higher compared to the values of Bolton norms. The mean values of the Bolton total ratios in our examinees of both sexes were not statistically different compared to the values of Bolton norms.
Determining of intermaxillary ratios is an important diagnostic and prognostic value in orthodontics since it offers a possibility to predict the outcome of orthodontic therapy applied on persons with tooth size discrepancy related to the upper and lower jaw.
上颌与下颌牙齿大小的特定比例对于正常咬合的形成非常重要。在正常咬合中，牙齿大小必须成比例。下颌与上颌牙弓之间牙齿大小的差异通常是咬合比例不协调的原因。确定上下颌牙齿大小差异最常用的方法之一是对恒牙近远中宽度进行博尔顿分析。
选取恒牙列且安氏I类咬合比例的男女受试者，获取精确印模并制作研究模型。根据以下标准选择60例患者（30例男性和30例女性）：恒牙列从一侧第一磨牙到另一侧第一磨牙完全萌出；研究模型质量良好；无近远中及咬合磨损、龋损、II类充填物；无修复体或复合树脂修复；牙齿形态、结构及发育无异常。测量从一侧第一磨牙到另一侧第一磨牙每颗牙齿的近远中宽度，从近中接触点到具有最大邻间隙的远中接触点。
左右侧牙齿近远中宽度的测量结果无统计学显著差异。博尔顿前牙比例的平均值未显示出性别差异，博尔顿总比例的平均值在性别上也无差异。我们研究的男女受试者的博尔顿前牙比例平均值显著高于博尔顿标准值。我们研究的男女受试者的博尔顿总比例平均值与博尔顿标准值相比无统计学差异。
确定颌间比例在正畸学中具有重要的诊断和预后价值，因为它能够预测对上下颌牙齿大小存在差异的患者进行正畸治疗的效果。
