Sangwan S, Chawla H S, Goyal A, Gauba K, Mohanty U
Department of Pedodontics, Government Dental College, Rohtak, India.
J Indian Soc Pedod Prev Dent. 2011 Jan-Mar;29(1):14-9. doi: 10.4103/0970-4388.79915.
The present study was conducted to evaluate, on a longitudinal basis, the changes in intercanine and intermolar widths form the primary to the early mixed dentition periods.
A total of 38 children aged 4-5 years, with normal occlusion without any proximal caries or any dental anomalies, were selected. The impressions were recorded and casts were prepared. Intercanine and intermolar widths were measured on these dental casts with the help of a digital vernier calliper. After 3 years follow-up, the impressions were recorded again and dental casts were prepared. Intercanine and intermolar widths were measured again at this stage and were compared with the baseline data using the paired t-test and the chi square test.
There is a significant increase in the intercanine (3.93 + 1.70 mm) and intermolar width (1.49 + 1.77 mm) during the transition period from primary to early mixed dentition in both the arches and both the sexes. The gender-wise comparison showed a greater increase in males than in females, but this was not statistically significant.
A thorough knowledge of growth changes during various stages of the mixed dentition period are important for a pediatric dentist to make an accurate diagnosis and treatment planning during preventive and interceptive orthodontics.
本研究旨在纵向评估从乳牙列期到早混合牙列期犬齿间宽度和磨牙间宽度的变化。
选取38名4 - 5岁、咬合正常且无邻面龋或任何牙齿异常的儿童。记录印模并制作模型。借助数字游标卡尺在这些模型上测量犬齿间宽度和磨牙间宽度。经过3年随访后，再次记录印模并制作模型。在此阶段再次测量犬齿间宽度和磨牙间宽度，并使用配对t检验和卡方检验与基线数据进行比较。
在从乳牙列期到早混合牙列期的过渡期，上下颌及男女两性的犬齿间宽度（3.93 + 1.70毫米）和磨牙间宽度（1.49 + 1.77毫米）均有显著增加。按性别比较显示男性的增加幅度大于女性，但差异无统计学意义。
对于儿童牙医而言，全面了解混合牙列期各阶段的生长变化对于在预防性和阻断性正畸治疗期间进行准确诊断和治疗计划至关重要。
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