Comparison of success rates of orthodontic mini-screws by the insertion method

Jung Suk Kim, Seong Hwan Choi, Sang Kwon Cha, Jang Han Kim, Hwa Jin Lee, Sang Seon Yeom, Chung Ju Hwang

Research output: Contribution to journalReview article

15 Citations (Scopus)

Abstract

Objective: The aim of this study was to compare the success rates of the manual and motor-driven mini-screw insertion methods according to age, gender, length of mini-screws, and insertion sites. Methods: We retrospectively reviewed 429 orthodontic mini-screw placements in 286 patients (102 in men and 327 in women) between 2005 and 2010 at private practice. Age, gender, mini-screw length, and insertion site were cross-tabulated against the insertion methods. The Cochran-Mantel-Haenszel test was performed to compare the success rates of the 2 insertion methods. Results: The motor-driven method was used for 228 mini-screws and the manual method for the remaining 201 mini-screws. The success rates were similar in both men and women irrespective of the insertion method used. With respect to mini-screw length, no difference in success rates was found between motor and hand drivers for the 6-mm-long mini-screws (68.1% and 69.5% with the engine driver and hand driver, respectively). However, the 8-mm-long mini-screws exhibited significantly higher success rates (90.4%, p < 0.01) than did the 6-mm-long mini-screws when placed with the engine driver. The overall success rate was also significantly higher in the maxilla (p < 0.05) when the engine driver was used. Success rates were similar among all age groups regardless of the insertion method used. Conclusions: Taken together, the motor-driven insertion method can be helpful to get a higher success rate of orthodontic mini-screw placement.

Original languageEnglish
Pages (from-to)242-248
Number of pages7
JournalKorean Journal of Orthodontics
Volume42
Issue number5
DOIs
Publication statusPublished - 2012 Nov 19

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Orthodontics
Hand
Private Practice
Maxilla
Age Groups

All Science Journal Classification (ASJC) codes

  • Orthodontics

Cite this

Kim, Jung Suk ; Choi, Seong Hwan ; Cha, Sang Kwon ; Kim, Jang Han ; Lee, Hwa Jin ; Yeom, Sang Seon ; Hwang, Chung Ju. / Comparison of success rates of orthodontic mini-screws by the insertion method. In: Korean Journal of Orthodontics. 2012 ; Vol. 42, No. 5. pp. 242-248.
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Comparison of success rates of orthodontic mini-screws by the insertion method. / Kim, Jung Suk; Choi, Seong Hwan; Cha, Sang Kwon; Kim, Jang Han; Lee, Hwa Jin; Yeom, Sang Seon; Hwang, Chung Ju.

In: Korean Journal of Orthodontics, Vol. 42, No. 5, 19.11.2012, p. 242-248.

Research output: Contribution to journalReview article

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AB - Objective: The aim of this study was to compare the success rates of the manual and motor-driven mini-screw insertion methods according to age, gender, length of mini-screws, and insertion sites. Methods: We retrospectively reviewed 429 orthodontic mini-screw placements in 286 patients (102 in men and 327 in women) between 2005 and 2010 at private practice. Age, gender, mini-screw length, and insertion site were cross-tabulated against the insertion methods. The Cochran-Mantel-Haenszel test was performed to compare the success rates of the 2 insertion methods. Results: The motor-driven method was used for 228 mini-screws and the manual method for the remaining 201 mini-screws. The success rates were similar in both men and women irrespective of the insertion method used. With respect to mini-screw length, no difference in success rates was found between motor and hand drivers for the 6-mm-long mini-screws (68.1% and 69.5% with the engine driver and hand driver, respectively). However, the 8-mm-long mini-screws exhibited significantly higher success rates (90.4%, p < 0.01) than did the 6-mm-long mini-screws when placed with the engine driver. The overall success rate was also significantly higher in the maxilla (p < 0.05) when the engine driver was used. Success rates were similar among all age groups regardless of the insertion method used. Conclusions: Taken together, the motor-driven insertion method can be helpful to get a higher success rate of orthodontic mini-screw placement.

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