Abstract
To compare tooth movement rate and histological responses with three different force magnitude designs under osteoperforation in rabbit models. 48 rabbits were divided into three groups: Group A, Group B, and Group C, with traction force of 50 g, 100 g, 150 g, respectively. Osteoperforation was performed at the mesial of the right mandibular first premolar, the left side was not affected. One mini-screw was inserted into bones between two central incisors. Coil springs were fixed to the first premolars and the mini-screw. Tooth movement distance was calculated, and immunohistochemical staining of PCNA, OCN, VEGF, and TGF-β1 was analyzed. The tooth movement distance on the surgical side was larger than the control side in all groups (P<0.01). No significant intergroup difference was observed for the surgical side in tooth movement distance among the three groups (P>0.05). For the control side, tooth movement distance in Group A was significantly smaller than Groups B and C (P<0.001); no significant difference in tooth movement distance between Group B and Group C was observed (P>0.05). On the tension area of the moving premolar, labeling of PCNA, OCN, VEGF and TGF-β1 were confirmed in alveolar bone and periodontal ligament in all groups. PCNA, OCN, VEGF and TGF-β1 on the surgical side was larger than the control side in all groups (P<0.001). Osteoperforation could accelerate orthodontic tooth movement rate in rabbits. Fast osteoperforation-assisted tooth movement in rabbits was achieve with light 50 g traction.
Highlights
In clinical tooth extraction cases of protrusive adult orthodontics, it always takes approximately two and half years of traditional fixed appliance treatment
The efforts to increase the rate of tooth movement and shorten the treatment period have always been a focus of clinical orthodontics
The results of the exploratory chi-square statistical tests confirmed the hypothesis of normality of distribution for the tooth movement distance
Summary
In clinical tooth extraction cases of protrusive adult orthodontics, it always takes approximately two and half years of traditional fixed appliance treatment. Long-term comprehensive orthodontic treatments bring many risks to patients, such as root absorption, dental decalcification and periodontal disease.. The efforts to increase the rate of tooth movement and shorten the treatment period have always been a focus of clinical orthodontics. The growing number of adults requiring orthodontic treatment has brought more awareness to the matter.. In the last 20 years, many procedures to accelerate tooth movement and shorten the orthodontic treatment period, such as low-intensity laser treatments, lowintensity pulsed ultrasound, pulsed electromagnetic fields, corticotomy, and corticision, have been investigated.. Good-quality randomized clinical trials show that corticotomy is useful in increasing tooth movement rate. In the last 20 years, many procedures to accelerate tooth movement and shorten the orthodontic treatment period, such as low-intensity laser treatments, lowintensity pulsed ultrasound, pulsed electromagnetic fields, corticotomy, and corticision, have been investigated. Good-quality randomized clinical trials show that corticotomy is useful in increasing tooth movement rate.
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