Therkildsen Nicoline Mie, Sonnesen Liselotte
Section for Orthodontics, Department of Odontology, Faculty of Health and Medical Sciences, University of Copenhagen, DK-2200 Copenhagen, Denmark.
Dent J (Basel). 2022 Jan 19;10(2):14. doi: 10.3390/dj10020014.
Previously, bite force, occlusal contact and pain were investigated in orthodontic patients with moderate-to-severe malocclusion, but not in patients with minor malocclusion. The purpose of this study was to investigate changes in bite force, teeth in occlusal contact and pain in orthodontic patients with minor crowding before orthodontic treatment (T0), after bonding (T1), during treatment (T2), post-treatment (T3) and during retention (T4). In total, 27 patients (21 females, 6 males, median age 15.3 years) with neutral occlusion and normal craniofacial morphology were treated with non-extractions and fixed appliances. Differences in the registered data were analysed by a mixed linear model with repeated measures. Bite force and teeth in occlusal contact significantly decreased between T0 and T1 ( < 0.0001, respectively) and between T0 and T2 ( < 0.01, respectively). Bite force and teeth in occlusal contact significantly increased between T1 and T4 ( < 0.05, < 0.0001, < 0.001, respectively) and between T2 and T4 ( < 0.05, < 0.0001, < 0.01, respectively). No significant difference in pain was found. The results indicate that bite force and teeth in occlusal contact significantly decreased during treatment and reached baseline level at retention. The findings may prove valuable for informing orthodontic patients with minor malocclusion.
此前，已对患有中重度错牙合畸形的正畸患者的咬合力、咬合接触和疼痛情况进行了研究，但未涉及轻度错牙合畸形患者。本研究的目的是调查轻度牙列拥挤的正畸患者在正畸治疗前（T0）、粘结后（T1）、治疗期间（T2）、治疗后（T3）以及保持期间（T4）咬合力、咬合接触牙齿和疼痛的变化。总共27例中性咬合且颅面形态正常的患者（21名女性，6名男性，中位年龄15.3岁）接受了非拔牙和固定矫治器治疗。通过重复测量的混合线性模型分析记录数据的差异。咬合力和咬合接触牙齿在T0和T1之间（分别<0.0001）以及T0和T2之间（分别<0.01）显著降低。咬合力和咬合接触牙齿在T1和T4之间（分别<0.05、<0.0001、<0.001）以及T2和T4之间（分别<0.05、<0.0001、<0.01）显著增加。未发现疼痛有显著差异。结果表明，治疗期间咬合力和咬合接触牙齿显著降低，并在保持期达到基线水平。这些发现可能对告知轻度错牙合畸形的正畸患者具有重要价值。
