Effectiveness and Safety of Power Chain versus Nickel Titanium Coil Springs in Closing Dental Extraction Space: A Meta-Analysis_Chinese Journal of Evidence-Based Medicine

Authors：

CHEN Yan ¹ , SHU Weina ² ,  HE Dengqi ¹

1. Department of Stomatology, The First Hospital of Lanzhou University, Lanzhou 730000, China;2. Dental Hospital of Lanzhou, Lanzhou 730000, China;

Corresponding author：

HE Dengqi, Email: ldyyzlwk@163.com

Keywords：

Nickel titanium coil spring; Power chain; Dental extraction space; Randomized controlled trial; Meta-analysis; Systematic review

DOI：

10.7507/1672-2531.20120217

Video：

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Objective 　To systematically review the effectiveness and safety of power chain vs. nickel titanium coil springs in closing dental extraction space.
Methods 　Databases including PubMed, EMbase, The Cochrane Library, Chinese Biomedicine Literature Database, Chinese Scientific Journals Full-text Database, and Chinese Journal Full-text Database were searched to collect the randomized controlled trials (RCTs) on comparing power chain with nickel titanium coil springs published before February 2012. Two reviewers independently screened literature, extracted data and assessed the quality of the included studies. Then meta-analysis was conducted using RevMan 5.0 software.
Results 　A total of 4 RCTs involving 122 patients were included. The results of meta-analyses showed that there was a significant difference in the rate of space closure between the two groups (MD=0.30 mm per month, 95%CI 0.17 to 0.44, P lt;0.000 1); The results of subgroup analyses indicated that, both high-quality trials (MD=0.20, 95%CI 0.07 to 0.34, P=0.003) and low quality trials (MD=0.40, 95%CI 0.30 to 0.50, P lt;0.000 01) showed no significant difference in the rate of space closure.
Conclusion 　Current clinical evidence indicates nickel titanium coil spring is superior to power chain in the rate of space closure, but its long-term effect still needs to be proved by more large-scale RCTs.

Citation： CHEN Yan,SHU Weina,HE Dengqi. Effectiveness and Safety of Power Chain versus Nickel Titanium Coil Springs in Closing Dental Extraction Space: A Meta-Analysis. Chinese Journal of Evidence-Based Medicine, 2012, 12(11): 1391-1395. doi: 10.7507/1672-2531.20120217 Copy

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3.	Oosterkamp BC, Dijkstra PU, Remmelink HJ, et al. Orthodontic space closure versus prosthetic replacement of missing upper lateral incisors in patients with bilateral cleft lip and palate. Cleft Palate Craniofac J, 2010, 47(6): 591-596.
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14.	Third revision of the National Consensus on Diagnosis and Treatment of Breast Cancer (second of three parts). Ginecol Obstet Mex, 2010, 78(2): 138-150.
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19.	Quinn RS, Yoshikawa DK. A reassessment of force magnitude in orthodontics. Am J Orthod, 1985, 88(3): 252-260.
20.	Han S, Quick DC. Nickel-titanium spring properties in a simulated oral environment. Angle Orthod, 1993, 63(1): 67-72.
21.	Geron S. Anchorage Considerations in Lingual Orthodontics. Seminars in Orthodontics, 2006, 12 (3): 167-177.
22.	王晓玲, 徐宝华, 梁伟. 舌侧与颊侧正畸上颌第一磨牙应力的有限元分析. 现代口腔医学杂志, 2008, 22(5): 548-549.
23.	蒙宇, 谭汉提, 邓文正, 等. 正畸治疗中两种关闭拔牙间隙方法的临床比较. 右江民族医学院学报, 2010, 1(1): 11-12.
24.	Schrumpf E, Soreide O, Aabakken L. How to report randomized controlled trials. The CONSORT statement. Consolidated Standards Of Reporting Trials. Scand J Gastroenterol, 1997, 32(12): 1185-1186.
25.	Bousquet PJ, Calderon MA, Demoly P, et al. The Consolidated Standards of Reporting Trials (CONSORT) Statement applied to allergen-specific immunotherapy with inhalant allergens: a Global Allergy and Asthma European Network (GA(2)LEN) article. J Allergy Clin Immunol, 2011, 127(1): 49-56, 56 e41-11.

1. O’Connor BM. Contemporary trends in orthodontic practice: a national survey. Am J Orthod Dentofacial Orthop, 1993, 103(2): 163-170.
2. Thickett E, Cobourne MT. New developments in tooth whitening. The current status of external bleaching in orthodontics. J Orthod, 2009, 36(3): 194-201.
3. Oosterkamp BC, Dijkstra PU, Remmelink HJ, et al. Orthodontic space closure versus prosthetic replacement of missing upper lateral incisors in patients with bilateral cleft lip and palate. Cleft Palate Craniofac J, 2010, 47(6): 591-596.
4. Kalha AS, Kachiwala VA, Govardhan SN, et al. Redefining orthodontic space closure: sequential repetitive loading of the periodontal ligament–a clinical study. World J Orthod, 2010, 11(3): 221-229.
5. Saporito I, Butti AC, Salvato A, et al. A "typodont" study of rate of orthodontic space closure: self- ligating systems vs. conventional systems. Minerva Stomatol, 2011, 60(11-12): 555-565.
6. Dixon V, Read MJ, O’Brien KD, et al. A randomized clinical trial to compare three methods of orthodontic space closure. J Orthod, 2002, 29(1): 31-36.
7. Nightingale C, Jones SP. A clinical investigation of force delivery systems for orthodontic space closure. J Orthod, 2003, 30(3): 229-236.
8. Bokas J, Woods M. A clinical comparison between nickel titanium springs and elastomeric chains. Aust Orthod J, 2006, 22(1): 39-46.
9. 刘彦. 两种弹性装置关闭拔牙间隙的疗效比较. 现代预防医学, 2009, 36(10): 1990-1991.
10. Young J, Sandrik JL. The influence of preloading on stress relaxation of orthodontic elastic polymers. Angle Orthod, 1979, 49(2): 104-109.
11. Baty DL, Storie DJ, von Fraunhofer JA. Synthetic elastomeric chains: a literature review. Am J Orthod Dentofacial Orthop, 1994, 105(6): 536-542.
12. Erverdi N, Koyuturk O, Kucukkeles N. Nickel-titanium coil springs and repelling magnets: a comparison of two different intra-oral molar distalization techniques. Br J Orthod, 1997, 24(1): 47-53.
13. Antonarakis GS, Kiliaridis S. Maxillary molar distalization with noncompliance intramaxillary appliances in Class II malocclusion. A systematic review. Angle Orthod, 2008, 78(6): 1133-1140.
14. Third revision of the National Consensus on Diagnosis and Treatment of Breast Cancer (second of three parts). Ginecol Obstet Mex, 2010, 78(2): 138-150.
15. Daskalogiannakis J, McLachlan KR. Canine retraction with rare earth magnets: an investigation into the validity of the constant force hypothesis. Am J Orthod Dentofacial Orthop, 1996, 109(5): 489- 495.
16. Yee JA, Turk T, Elekdag-Turk S, et al. Rate of tooth movement under heavy and light continuous orthodontic forces. Am J Orthod Dentofacial Orthop, 2009, 136(2):150 e151-159; discussion 150-151.
17. Friedrich D, Rosarius N, Rau G, et al. Measuring system for in vivo recording of force systems in orthodontic treatment-concept and analysis of accuracy. J Biomech, 1999, 32(1): 81-85.
18. Storey E, Smith R. Force in orthodontics and its relation to tooth movement. The Australian Journal of Dentistry, 1952, 56: 11-18.
19. Quinn RS, Yoshikawa DK. A reassessment of force magnitude in orthodontics. Am J Orthod, 1985, 88(3): 252-260.
20. Han S, Quick DC. Nickel-titanium spring properties in a simulated oral environment. Angle Orthod, 1993, 63(1): 67-72.
21. Geron S. Anchorage Considerations in Lingual Orthodontics. Seminars in Orthodontics, 2006, 12 (3): 167-177.
22. 王晓玲, 徐宝华, 梁伟. 舌侧与颊侧正畸上颌第一磨牙应力的有限元分析. 现代口腔医学杂志, 2008, 22(5): 548-549.
23. 蒙宇, 谭汉提, 邓文正, 等. 正畸治疗中两种关闭拔牙间隙方法的临床比较. 右江民族医学院学报, 2010, 1(1): 11-12.
24. Schrumpf E, Soreide O, Aabakken L. How to report randomized controlled trials. The CONSORT statement. Consolidated Standards Of Reporting Trials. Scand J Gastroenterol, 1997, 32(12): 1185-1186.
25. Bousquet PJ, Calderon MA, Demoly P, et al. The Consolidated Standards of Reporting Trials (CONSORT) Statement applied to allergen-specific immunotherapy with inhalant allergens: a Global Allergy and Asthma European Network (GA(2)LEN) article. J Allergy Clin Immunol, 2011, 127(1): 49-56, 56 e41-11.

Chinese Journal of Evidence-Based Medicine

Effectiveness and Safety of Power Chain versus Nickel Titanium Coil Springs in Closing Dental Extraction Space: A Meta-Analysis

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