Distal movement of mandibular molars in adult patients with the skeletal anchorage system

Junji Sugawara, Takayoshi Daimaruya, Mikako Umemori, Hiroshi Nagasaka, Ichiro Takahashi, Hiroshi Kawamura, Hideo Mitani

Research output: Contribution to journalArticle

142 Citations (Scopus)

Abstract

The skeletal anchorage system (SAS) consists of titanium anchor plates and monocortical screws that are temporarily placed in either the maxilla or the mandible, or in both, as absolute orthodontic anchorage units. Distalization of the molars has been one of the most difficult biomechanical problems in traditional orthodontics, particularly in adults and in the mandible. However, it has now become possible to move molars distally with the SAS to correct anterior crossbites, maxillary dental protrusion, crowding, and dental asymmetries without having to extract premolars. This study evaluated the treatment and posttreatment changes during and after distalization of the mandibular molars. In 15 adult patients (12 women and 3 men), a total of 29 mandibular molars were successfully distalized with SAS. The amount of distalization and relapse and the type of tooth movement were analyzed with cephalometric radiographs and dental casts. The average amount of distalization of the mandibular first molars was 3.5 mm at the crown level and 1.8 mm at the root level. The average amount of relapse was 0.3 mm at both the crown and root apex levels. Of 29 mandibular molars, 9 were tipped back, and the others were translated distally in accordance with the established treatment goals. SAS is a viable modality to move mandibular molars for distally correcting anterior crossbites, malocclusions characterized by mandibular anterior crowding, and dental asymmetries.

Original languageEnglish
Pages (from-to)130-138
Number of pages9
JournalAmerican Journal of Orthodontics and Dentofacial Orthopedics
Volume125
Issue number2
DOIs
Publication statusPublished - Jan 1 2004
Externally publishedYes

Fingerprint

Malocclusion
Tooth
Orthodontics
Crowns
Mandible
Cephalometry
Tooth Movement Techniques
Recurrence
Bicuspid
Maxilla
Titanium
Therapeutics

All Science Journal Classification (ASJC) codes

  • Orthodontics

Cite this

Distal movement of mandibular molars in adult patients with the skeletal anchorage system. / Sugawara, Junji; Daimaruya, Takayoshi; Umemori, Mikako; Nagasaka, Hiroshi; Takahashi, Ichiro; Kawamura, Hiroshi; Mitani, Hideo.

In: American Journal of Orthodontics and Dentofacial Orthopedics, Vol. 125, No. 2, 01.01.2004, p. 130-138.

Research output: Contribution to journalArticle

Sugawara, Junji ; Daimaruya, Takayoshi ; Umemori, Mikako ; Nagasaka, Hiroshi ; Takahashi, Ichiro ; Kawamura, Hiroshi ; Mitani, Hideo. / Distal movement of mandibular molars in adult patients with the skeletal anchorage system. In: American Journal of Orthodontics and Dentofacial Orthopedics. 2004 ; Vol. 125, No. 2. pp. 130-138.
@article{22c2f951ecc3424688d04c519d4de9f9,
title = "Distal movement of mandibular molars in adult patients with the skeletal anchorage system",
abstract = "The skeletal anchorage system (SAS) consists of titanium anchor plates and monocortical screws that are temporarily placed in either the maxilla or the mandible, or in both, as absolute orthodontic anchorage units. Distalization of the molars has been one of the most difficult biomechanical problems in traditional orthodontics, particularly in adults and in the mandible. However, it has now become possible to move molars distally with the SAS to correct anterior crossbites, maxillary dental protrusion, crowding, and dental asymmetries without having to extract premolars. This study evaluated the treatment and posttreatment changes during and after distalization of the mandibular molars. In 15 adult patients (12 women and 3 men), a total of 29 mandibular molars were successfully distalized with SAS. The amount of distalization and relapse and the type of tooth movement were analyzed with cephalometric radiographs and dental casts. The average amount of distalization of the mandibular first molars was 3.5 mm at the crown level and 1.8 mm at the root level. The average amount of relapse was 0.3 mm at both the crown and root apex levels. Of 29 mandibular molars, 9 were tipped back, and the others were translated distally in accordance with the established treatment goals. SAS is a viable modality to move mandibular molars for distally correcting anterior crossbites, malocclusions characterized by mandibular anterior crowding, and dental asymmetries.",
author = "Junji Sugawara and Takayoshi Daimaruya and Mikako Umemori and Hiroshi Nagasaka and Ichiro Takahashi and Hiroshi Kawamura and Hideo Mitani",
year = "2004",
month = "1",
day = "1",
doi = "10.1016/j.ajodo.2003.02.003",
language = "English",
volume = "125",
pages = "130--138",
journal = "American Journal of Orthodontics and Dentofacial Orthopedics",
issn = "0889-5406",
publisher = "Mosby Inc.",
number = "2",

}

TY - JOUR

T1 - Distal movement of mandibular molars in adult patients with the skeletal anchorage system

AU - Sugawara, Junji

AU - Daimaruya, Takayoshi

AU - Umemori, Mikako

AU - Nagasaka, Hiroshi

AU - Takahashi, Ichiro

AU - Kawamura, Hiroshi

AU - Mitani, Hideo

PY - 2004/1/1

Y1 - 2004/1/1

N2 - The skeletal anchorage system (SAS) consists of titanium anchor plates and monocortical screws that are temporarily placed in either the maxilla or the mandible, or in both, as absolute orthodontic anchorage units. Distalization of the molars has been one of the most difficult biomechanical problems in traditional orthodontics, particularly in adults and in the mandible. However, it has now become possible to move molars distally with the SAS to correct anterior crossbites, maxillary dental protrusion, crowding, and dental asymmetries without having to extract premolars. This study evaluated the treatment and posttreatment changes during and after distalization of the mandibular molars. In 15 adult patients (12 women and 3 men), a total of 29 mandibular molars were successfully distalized with SAS. The amount of distalization and relapse and the type of tooth movement were analyzed with cephalometric radiographs and dental casts. The average amount of distalization of the mandibular first molars was 3.5 mm at the crown level and 1.8 mm at the root level. The average amount of relapse was 0.3 mm at both the crown and root apex levels. Of 29 mandibular molars, 9 were tipped back, and the others were translated distally in accordance with the established treatment goals. SAS is a viable modality to move mandibular molars for distally correcting anterior crossbites, malocclusions characterized by mandibular anterior crowding, and dental asymmetries.

AB - The skeletal anchorage system (SAS) consists of titanium anchor plates and monocortical screws that are temporarily placed in either the maxilla or the mandible, or in both, as absolute orthodontic anchorage units. Distalization of the molars has been one of the most difficult biomechanical problems in traditional orthodontics, particularly in adults and in the mandible. However, it has now become possible to move molars distally with the SAS to correct anterior crossbites, maxillary dental protrusion, crowding, and dental asymmetries without having to extract premolars. This study evaluated the treatment and posttreatment changes during and after distalization of the mandibular molars. In 15 adult patients (12 women and 3 men), a total of 29 mandibular molars were successfully distalized with SAS. The amount of distalization and relapse and the type of tooth movement were analyzed with cephalometric radiographs and dental casts. The average amount of distalization of the mandibular first molars was 3.5 mm at the crown level and 1.8 mm at the root level. The average amount of relapse was 0.3 mm at both the crown and root apex levels. Of 29 mandibular molars, 9 were tipped back, and the others were translated distally in accordance with the established treatment goals. SAS is a viable modality to move mandibular molars for distally correcting anterior crossbites, malocclusions characterized by mandibular anterior crowding, and dental asymmetries.

UR - http://www.scopus.com/inward/record.url?scp=1042289429&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=1042289429&partnerID=8YFLogxK

U2 - 10.1016/j.ajodo.2003.02.003

DO - 10.1016/j.ajodo.2003.02.003

M3 - Article

VL - 125

SP - 130

EP - 138

JO - American Journal of Orthodontics and Dentofacial Orthopedics

JF - American Journal of Orthodontics and Dentofacial Orthopedics

SN - 0889-5406

IS - 2

ER -