Chinese Journal of Tissue Engineering Research ›› 2010, Vol. 14 ›› Issue (2): 237-239.doi: 10.3969/j.issn.1673-8225.2010.02.011

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Meta analysis of soft tissue profile repair in patients treated with and without premolar extraction

Liu Ze-ping, Chen Ting-ting, Li Gui-feng, Jiang Si-cong, Zou Shu-juan   

  1. Department of Stomatology, West China College, Sichuan University, Chengdu   610041, Sichuan Province, China
  • Online:2010-01-08 Published:2010-01-08
  • Contact: Zou Shu-juan, Professor, Doctoral supervisor, Department of Stomatology, West China College, Sichuan University, Chengdu 610041, Sichuan Province, China shujuanzou@yahoo.com.cn
  • About author:Liu Ze-ping★, Studying for master’s degree, Department of Stomatology, West China College, Sichuan University, Chengdu 610041, Sichuan Province, China angellzpyyg@yahoo.com.cn
  • Supported by:

    Soft Science Program of Sichuan Provincial Science and Technology Department, No. 2008ZR0160*

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Abstract:

OBJECTIVE: To analyze the impact of extraction and nonextraction in soft tissue profile repair.
METHODS: Databases of CNKI, Wanfang, VIP Chinese Periodical Database, CBM, Medline (ovid) and Science direct had been searched for studies of soft tissue profile after orthodontic treatment with and without extractions published in recent decade, with orthodontics, corrective, tooth extraction, soft tissue profile as key words. Hand searching was also done to obtain any further information about the studies. Meta analysis was used to comprehensively quantitatively analyze the upper (lower) lip with esthetic plane and soft tissue plane before and after extraction and nonextraction treatment. According to homogeneity test, fixed effect model and random effect model were adopted to calculate weighted mean difference (WMD) and 95% confidence interval (95% CI). Revman 5.0 was used for data management.
RESULTS: Five studies with 356 patients were included. Homogeneity test showed that lower lip-esthetic line and lower lip-soft tissue line I2 < 50%, without heterogeneity, so fixed effect model was adopted. Upper lip-esthetic line and upper lip-soft tissue line were more than 50%, indicating heterogeneity, so random effect model was adopted. Result of meta-analysis showed that, the WMD value and 95% CI of lower lip-esthetic line, lower lip-soft tissue line, and upper lip-soft tissue line has statistically significance.
CONCLUSION: The extraction treatment significantly decreased the distance of lower lip-esthetic line, lower lip-soft tissue line, and upper lip-soft tissue line.

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