Abulwefa Ahmed, Brkić Hrvoje, Kaić Zvonimir
Department of Orthodontics, Pedodontics and Preventive Dentistry, Faculty of Dental Medicine and Oral Surgery, Tripoli University, Libya.
Department of Dental Anthropology, School of Dental Medicine University of Zagreb & University Clinical Hospital Center Zagreb, Croatia.
Acta Stomatol Croat. 2017 Dec;51(4):300-308. doi: 10.15644/asc51/4/4.
To investigate the eruption angle of maxillary canine in patients with Klinefelter syndrome (KS) in which high prevalence of palatally displaced canine anomaly (PDC) has been found by clinical assessment.
The sample consisted of 37 KS males aged 20-34 years (mean 27 years) and the control group which consisted of 78 healthy males aged 20-27 years (mean 23 years). A pioneer method was used to measure the eruption angle. It was based on determining the topographic construction of mandibular gonion line called GO-GO method on panoramic radiograph.
The mean of eruption angle was increased for 10.58° in the right side and 9.69 ° in left side in patients with KS compared to those in the control group. The difference of mesioangular inclination of palatally displaced canines in Klinefelter patients was statistically significant (p< 0.01). When eruption angle in the control group was compared to Klinefelter patients, the statistical difference was confirmed for respective sides (P <0.01 for both).
The difference between eruption angle values in KS patients as well as in those belonging to the control group seemed to identify a developmental disturbance, thus confirming the fact that an extra X chromosome has an influence. The GO-GO method might be used for males when it is difficult to define occlusal planes, or for comparison. If this method is used, the eruption angular values should not exceed 56.74°.
通过临床评估发现，克氏综合征（KS）患者中腭侧移位尖牙异常（PDC）的患病率较高，本研究旨在调查该综合征患者上颌尖牙的萌出角度。
样本包括37名年龄在20 - 34岁（平均27岁）的KS男性以及由78名年龄在20 - 27岁（平均23岁）的健康男性组成的对照组。采用一种开创性的方法测量萌出角度。该方法基于在全景X线片上确定下颌角线的地形结构，即GO - GO法。
与对照组相比，KS患者右侧萌出角度平均增加10.58°，左侧增加9.69°。克氏综合征患者中腭侧移位尖牙近中倾斜度的差异具有统计学意义（p < 0.01）。当将对照组的萌出角度与克氏综合征患者进行比较时，两侧均证实存在统计学差异（两侧均P < 0.01）。
KS患者与对照组患者萌出角度值的差异似乎表明存在发育障碍，从而证实了额外的X染色体具有影响这一事实。当难以确定咬合平面时，GO - GO法可用于男性患者或进行比较。如果使用该方法，萌出角度值不应超过56.74°。
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