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Long-term stability of miniscrew anchored maxillary molar distalization in Class II treatment

 Till Edward Bechtold  ;  Young-Chel Park  ;  Kyung-Ho Kim  ;  Heekyu Jung  ;  Ju-Young Kang  ;  Yoon Jeong Choi 
 ANGLE ORTHODONTIST, Vol.90(3) : 362-368, 2020-05 
Journal Title
Issue Date
Class II malocclusion ; Miniscrew anchorage ; Molar distalization ; Relapse ; Stability ; Total arch distalization
Objective: To investigate treatment stability of miniscrew-anchored maxillary distalization in Class II malocclusion. Materials and methods: This retrospective study included a distalization (n = 19) and a control (n = 19) group; a patient group with minor corrections served the control. Lateral cephalograms of 38 adult patients were taken before (T0), immediately after (T1), and 3-4 years after (T2) treatment. Horizontal and vertical movement and tipping of the maxillary first molars (U6) and central incisors (U1) were measured along with skeletal craniofacial parameters at three time points to compare the two groups regarding the achieved treatment effects and their stability. Results: Total arch distalization therapy led to 4.2 mm of distal movement of U6 without distal crown tipping (0.6° of axis change) and 3.3° of occlusal plane steepening. Over an average retention period of 42 months, maxillary total arch distalization provided high stability of treatment results, showing the same amount of mesial movement (0.7 mm) as the control group. Conclusions: In Class II treatment, miniscrew-anchored maxillary total arch distalization can provide stable distal movement of the maxillary first molars and central incisors.
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2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Kyung Ho(김경호) ORCID logo https://orcid.org/0000-0002-8154-2041
Park, Young Chel(박영철)
Jung, Heekyu(정희규) ORCID logo https://orcid.org/0000-0002-0385-2095
Choi, Yoon Jeong(최윤정) ORCID logo https://orcid.org/0000-0003-0781-8836
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