Abstract:Objective To explore the effect of double chain method support on the closure of orthodontic tooth gap.Methods From June 2014 to June 2017, 72 patients of orthodontic patients with different maxillary and mandibular dentition clearances were randomly selected in Department of Stomatology, Affiliated Hospital of Chengde Medical College. The patients were randomly divided into the research group and the control group (n=36) according to the digital table. The control group patients all implants using micro technology with straight wire bow correction. The patients in the study group were treated with double chain method. The time required for tooth gap closure, periodontal index and complications in the two groups was recorded.Results The mean time of the closing time of tooth extraction clearance in the research group and in the control group were (4.19±0.76) and (5.34±0.56) months. The research group was shorter than the control group (t=7.309, P<0.01). The reverse rate of the further tongue in the crown of fang in the two groups were 5.56%(2/36) and 27.78%(10/36). The research group was lower than the control group (χ2=6.400, P<0.05) . The gingival index (GI)of the research group before and after 6 months treatment were 0.53±0.11 and 0.83±0.47, respectively. The control group was 0.54±0.17 and 0.85±0.49, respectively. Compared with pre-treatment, the GI in two groups were significantly improved after treatment for 6 months, the difference was statistically significant (t=3.729、3.586, all P values<0.01). The SPD of the research group before and after 6 months treatment were (2.25±0.43) mm and(2.87±0.47) mm, respectively. The control group was (2.17±0.37) mm and(2.82±0.54)mm, respectively. Compared with pre-treatment, the SPD in two groups were significantly improved after treatment for 6 months, the difference was statistically significant (t=5.840, 5.958, P<0.05). The SBI of the research group before and after 6 months treatment was 0.67±0.36 and 1.23±0.35, respectively. The control group was 0.64±0.38 and 1.15±0.21, respectively. Compared with pre-treatment, the SBI in two groups were significantly improved after treatment for 6 months, the difference was statistically significant (t=6.692, 7.048, all P values<0.05). The PLI of the research group before and after 6 months treatment was 0.81±0.43 and 1.62±0.43, respectively. The control group was 0.86±0.21 and 1.17±0.25, respectively. Compared with pre-treatment, the PLI in two groups were significantly improved after treatment for 6 months, the difference was statistically significant (t=8.288, 5.697, all P values<0.05). Between the two groups of the GI, SPD, SBI were not significantly improved before and after treatment (all P values>0.05),while the research group of the PLI index was significantly better than control group,the difference was statistically significant (t=5.428, all P values<0.01). The incidence of complications in the research group was 2.78%(1/36),the control group was 13.89%(5/36),the difference was statistically significant(χ2=22.500, P<0.01).Conclusions In orthodontic therapy, double chain method to close the orthodontic tooth gap has shorten the time, it is good for the health of periodontal tissue and reduce the incidence of complications.So it is worthy of clinical promotion.
赵婵媛, 王杨洋, 王鹏, 霍峰. 双链法与微种植体支抗配合直丝弓矫治技术对正畸牙牙间隙关闭影响的对比观察[J]. 中华解剖与临床杂志, 2018, 23(4): 333-337.
Zhao Chanyuan, Wang Yangyang, Wang Peng, Huo Feng.. Comparative study of double chain method and micro implant anchorage with straight wire appliance on orthodontic tooth gap closure. Chinese Journal of Anatomy and Clinics, 2018, 23(4): 333-337.
Kang T, Huang SY, Huang JJ, et al. The effects of diamond-like carbon films on fretting wear behavior of orthodontic archwire-bracket contacts[J]. J Nanosci Nanotechnol, 2015, 15(6): 4641-4647. DOI:10.1166/jnn.2015.9788
[3]
Lopes M, Felizardo K, Kaneshima R, et al. Evaluation of tensile and friction resistance of various orthodontic elastomeric ligatures[J]. Br J Med Med Res, 2016, 17(6): 1-8. DOI:10.9734/bjmmr/2016/28045
[4]
Doshi UH, Bhad-Patil WA. Static frictional force and surface roughness of various bracket and wire combinations[J]. Am J Orthod Dentofacial Orthop, 2011, 139(1): 74-79. DOI:10.1016/j.ajodo.2009.02.031