Abstract:

BACKGROUND: Implant anchorage and J-hook are commonly used in orthodontic treatment, both of which can enhance the anchorage, but the effects of them may be different. 
OBJECTIVE: To compare the differences of implant anchorage and J-hook headgear between clinical therapeutic efficacy and root adsorption.
METHODS: PubMed database (1950-01/2010-08), Embase (1966-01/2010-08), Cochrane library (the second phase, 2010), VIP database (1989-2010-08), CBM database (1978-01-2010-08), CNKI database (1979-01-2010-08) was retrieved by computer. Literatures addressing implant anchorage and J-hook headgear effect published in 10 years by domestic and foreign scholars were collected with manual research and supplemented with the article retrospective approach. Cephalometric measurements were quantitatively analyzed by Meta analysis. Revman 5.0 was used for data management. Chi-square test was used to undergo homogeneity test of included studies. Fixed effect model and random effect model were adopted to calculate weighted mean difference (MD) and 95% confidence interval (95% CI).
RESULTS AND CONCLUSION: A total of 4 literatures were included, 87 cases of objects. Meta analysis demonstrated that there were significant differences among overbite decrement, overjet decrement, and the vertical distance of upper central incisor cutting to palatal plane (PP) decrement in index changes. Individual results showed that compared to J-hook headgear, the reduction of root adsorption was caused by implant anchorage; there were significant differences in results. In terms of anchorage control, implant anchorage is a good alternative to J-hook headgear. However, it still needs more high quality RCT of large sample to further verify the differences between implant anchorage and J-hook headgear.