Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Comparative Study
. 2017 Mar;87(2):320-327.
doi: 10.2319/051016-375.1. Epub 2016 Sep 29.

Comparison of the effects of mini-implant and traditional anchorage on patients with maxillary dentoalveolar protrusion

Yanhua Xu, Jiye Xie
Comparative Study

Comparison of the effects of mini-implant and traditional anchorage on patients with maxillary dentoalveolar protrusion

Yanhua Xu et al. Angle Orthod. 2017 Mar.

Abstract

Objective: To compare the treatment effects of mini-implants as anchor units with conventional methods of anchorage reinforcement in maxillary dentoalveolar protrusion patients in terms of skeletal, dental, and soft tissue changes.

Materials and methods: We searched the databases of the Cochrane Library, PubMed, OVIDSP, CBM, VIP, WanFang Data, and CNKI covering December 1966 to March 2016 for randomized controlled trials (RCTs) and clinical controlled trials that compared the treatment effects of mini-implants with conventional anchorage reinforcement in maxillary dentoalveolar protrusion patients. Literature filtering, data extraction, and methodological quality evaluation were finished independently by two researchers and disagreements were solved by discussion. Meta-analysis was performed when possible; otherwise descriptive assessment was done.

Results: Through a predefined search strategy, we finally included 14 eligible studies. Eight outcomes were evaluated in this study: maxillary incisor retraction, maxillary molar movement, U1-SN, SNA, SN-MP, UL-E Plane, NLA and G-Sn-Pg.

Conclusions: Mini-implant anchorage was more effective in retracting the anterior teeth, produced less anchorage loss, and had a greater effect on SN-MP for the high-angle patients than did traditional anchorage. Both mini-implants and traditional anchorage underwent decreases in on U1-SN and SNA. More qualified RCTs are required to make reliable recommendations about the anchorage capacity of mini-implant and traditional anchorage in patients with maxillary dentoalveolar protrusion, especially on the UL-E plane, NLA, and G-Sn-Pg.

Keywords: Implant; Protrusion; Systematic review; Traditional anchorage.

PubMed Disclaimer

Figures

Figure 1.
Figure 1.
Flow chart summarizing literature search.
Figure 2.
Figure 2.
Meta-analysis of SNA.
Figure 3.
Figure 3.
Meta-analysis of SN-MP.
Figure 4.
Figure 4.
Meta-analysis of maxillary incisor retraction.
Figure 5.
Figure 5.
Meta-analysis of maxillary molar movement.
Figure 6.
Figure 6.
Meta-analysis of U1-SN.
Figure 7.
Figure 7.
Meta-analysis of UL-E plane.
Figure 8.
Figure 8.
Meta-analysis of NLA.
Figure 9.
Figure 9.
Meta-analysis of G-Sn-Pg.
See this image and copyright information in PMC

References

    1. Upadhyay M, Yadav S, Nagaraj K, Patil S. Treatment effects of mini implants for en-masse retraction of anterior teeth in bialveolar dental protrusion patients: a randomized controlled trial. Am J Orthod Dentofacial Orthop. 2008;134:18–29. - PubMed
    1. Melsen B, Bosch C. Different approaches to anchorage: a survey and an evaluation. Angle Orthod. 1997;67:23–30. - PubMed
    1. Proffit WR. The second stage of comprehensive treatment: correction of molar relationship and space closure. In: Proffit WR, Fields HW Jr, editors. Contemporary orthodontics. 3rd ed. St. Louis: Mosby-Yearbook; 1997. pp. 573–577.
    1. Upadhyay M, Yadav S, Patil S. Mini-implant anchorage for en-masse retraction of maxillary anterior teeth: a clinical cephalometric study. Am J Orthod Dentofacial Orthop. 2008;134:803–810. - PubMed
    1. Costa A, Raffaini M, Melsen B. Miniscrews as orthodontic anchorage: a preliminary report. Int J Adult Orthod Orthognath Surg. 1998;13:201–229. - PubMed

MeSH terms

Substances