Distal movement of maxillary molars in nongrowing patients with the skeletal anchorage system

Junji Sugawara, Reiko Kanzaki, Ichiro Takahashi, Hiroshi Nagasaka, Ravindra Nanda

Research output: Contribution to journalArticlepeer-review

88 Citations (Scopus)

Abstract

Introduction: It is now possible to predictably move maxillary molars distally in nongrowing patients with the skeletal anchorage system (SAS) and to improve malocclusions without having to extract the premolars and regardless of the patient's compliance. The purposes of this study were to investigate the amount of distal movement of the maxillary first molars, the type of movement, the difference between actual and predicted amounts of distalization, and the relationship between the amount of distalization and age. Methods: Twenty-five nongrowing patients (22 female, 3 male) successfully treated with the SAS were the subjects in this study. The amount and the type of distalization, the difference between predicted and resulting amounts of distalization, and the relationship between the patient's age and the amount of distalization were analyzed with wide-opening cephalometric radiographs. Results: The average amount of distalization of the maxillary first molars was 3.78 mm at the crown level and 3.20 mm at the root level. The amount of distalization at the crown level was significantly correlated with the average value of treatment goals (3.60 mm). Conclusions: The maxillary molars were predictably distalized in accordance with the individualized treatment goals without regard to patient age and extraction of the third or second molars. The SAS is a viable noncompliance modality to move maxillary molars for distally correcting maxillary protrusions and malocclusions characterized by maxillary incisor crowding.

Original languageEnglish
Pages (from-to)723-733
Number of pages11
JournalAmerican Journal of Orthodontics and Dentofacial Orthopedics
Volume129
Issue number6
DOIs
Publication statusPublished - Jun 1 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Orthodontics

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