Hashim Hayder A, Al-Sayed Najah, Al-Hussain Hashim
Hamad Medical Corporation, Rumaila Hospital, Dental Centre, Orthodontic Division, Doha, Qatar.
J Orthod Sci. 2017 Jan-Mar;6(1):22-27. doi: 10.4103/2278-0203.197395.
To establish the overall and anterior Bolton ratio among a sample of Qatari population and to investigate whether there is a difference between males and females, as well as to compare the result obtained by Bolton.
The current study consisted of 100 orthodontic study participants (50 males and 50 females) with different malocclusions and age ranging between 15 and 20 years. An electronic digital caliper was used to measure the mesiodistal tooth width of all maxillary and mandibular permanent teeth except second and third molars. The Student's -test was used to compare tooth-size ratios between males and females and between the results of the present study and Bolton's result.
The anterior and overall ratio in Qatari individuals were 78.6 ± 3.4 and 91.8 ± 3.1, respectively. The tooth size ratios were slightly greater in males than that in females, however, the differences were not statistically significant ( > 0.05). There were no significant differences in the overall ratio between Qatari individuals and Bolton's results ( > 0.05), whereas statistical significant differences were observed in anterior ratio ( = 0.007).
Within the limitation of the limitations of the present study, definite conclusion was difficult to establish. Thus, a further study with a large sample in each malocclusion group is required.
确定卡塔尔人群样本中的总体博尔顿比率和前牙博尔顿比率，调查男性和女性之间是否存在差异，并比较本研究结果与博尔顿所得结果。
本研究包括100名正畸研究参与者（50名男性和50名女性），他们有不同的错颌畸形，年龄在15至20岁之间。使用电子数字卡尺测量除第二和第三磨牙外所有上颌和下颌恒牙的近远中牙宽度。采用学生t检验比较男性和女性之间以及本研究结果与博尔顿结果之间的牙大小比率。
卡塔尔人的前牙比率和总体比率分别为78.6±3.4和91.8±3.1。男性的牙大小比率略高于女性，但差异无统计学意义（P>0.05）。卡塔尔人与博尔顿结果之间的总体比率无显著差异（P>0.05），而在前牙比率方面观察到统计学显著差异（P=0.007）。
在本研究的局限性范围内，难以得出明确结论。因此，需要在每个错颌畸形组中进行大样本的进一步研究。
