Volume 19 Issue 12
Dec.  2021
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Article Navigation >  Chinese Journal of General Practice  > 2021  >  19(12): 2024-2027
MA Tao, ZHANG Rui, FENG Zhe, TIAN Bing-xin. Effect of micro-implant screw combined with transverse palatal rod anchorage on the vertical orientation, arch width and posterior cheek inclination of class Ⅱ high-angle patients[J]. Chinese Journal of General Practice, 2021, 19(12): 2024-2027. doi: 10.16766/j.cnki.issn.1674-4152.002226
Citation: MA Tao, ZHANG Rui, FENG Zhe, TIAN Bing-xin. Effect of micro-implant screw combined with transverse palatal rod anchorage on the vertical orientation, arch width and posterior cheek inclination of class Ⅱ high-angle patients[J]. Chinese Journal of General Practice, 2021, 19(12): 2024-2027. doi: 10.16766/j.cnki.issn.1674-4152.002226
shu

Effect of micro-implant screw combined with transverse palatal rod anchorage on the vertical orientation, arch width and posterior cheek inclination of class Ⅱ high-angle patients

doi: 10.16766/j.cnki.issn.1674-4152.002226
  • 1.

    Department of Stomatology, Xingtai Medical College (Second Affiliated Hospital of Xingtai Medical College), Xingtai, Hebei 054000, China

Funds:

 19277792D

  • Received Date: 2020-07-13
    Available Online: 2022-03-02
    Abstract
  •   Objective  To compare the effects of micro-implant screw anchorage system (MAS) combined with transverse palatal rod anchorage (TPA) on the angle Ⅱ high-angle patients.  Methods  Forty Class Ⅱ high-angle patients who were admitted to the Second Affiliated Hospital of Xingtai Medical College from June 2014 to June 2015 were selected. The patients were randomly divided into the MAS group and MAS combined with TPA group according to the number of entry time, with 20 cases each group. The vertical distance of molars before and after orthodontic treatment was measured by X-ray cephalometric lateral film. An electronic vernier caliper was used to measure the transverse width of the mandibular and upper dental arch before and after orthodontic treatment. The buccal inclination of the first molar was measured and analysed by CBCT before and after treatment. The changes of the vertical distance, the width of the arch and the buccal inclination of the posterior teeth were compared between the two groups.  Results  After correction, the vertical distance of the molar (L6-MP, LI-MP, U6M-SV, U6-PP and UI-PP) in the MAS combined with TPA group has no significant difference than that in the MAS group (all P>0.05), and each index of arch width (U33, U55, U66, L33, L55 and L66) in the MAS combined with TPA group the difference were statistically significant (all P < 0.05). The molar rotation angle and buccal distance in the MAS combined with TPA group were significantly higher than those in the MAS group [(2.23±0.45)° vs. (1.06±0.24)°; (1.23±0.08) mm vs. (0.15±0.01) mm], whilst the molar displacement was significantly lower in the MAS combined with TPA group than in the MAS group [(3.13±0.66) mm vs. (5.21±0.82) mm, all P < 0.05].  Conclusion  MAS combined with TPA can effectively reduce the vertical change of molars, promote the increase of the arch width and improve buccal inclination. The effect of MAS combined with TPA is better than that of MAS in the treatment of Class Ⅱ high-angle patients, which is worthy of clinical application.

     

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