1Anchorage has long been one of the greatest problems in the field of orthodontics because teeth, even molars£¬
move in response to orthodontic forces. Therefore£¬in maximal anchorage cases£¬patients have needed to wear
headgear. Thus£¬reinforced anchorage with extraoral appliances has severe limitations because it requires
excellent patient compliance.
This Anchor Plate is developed by Junji Sugawara and made of pure titanium suitable for osseointegration and
tissue integration. Anchor plate is developed to provide intraoral absolute anchorage for the intrusion or
distalization of molars. This plate has three positions: head£¬arm and body. Jeil's Anchor Plate does not disturb any
kind of tooth movement because they are placed outside the dentition. Furthermore£¬this plate is the most
distinctive feature of SAS in comparison with other orthodontic implant systems.
Anchor Plate Biomechanics for Molar Movement
2These figures show the SAS mechanics for intrusion and distalization
of the molars. It has been extremely difficult£¬if not impossible£¬to
intrude the upper and lower molars with traditional orthodontic
mechanotherapies. Impacting the lower molar region especially£¬even
with orthognathic surgery£¬has posed real problems because of the risk
of injuring the inferior alveolar nerve. SAS mechanics£¬however£¬can
accomplish the intrusion of molars£¬making it possible to correct even
severe open bite cases without orthognathic surgery and without
iatrogenic side effects. (Fig. A and B)
3Distalization of the upper or lower molars has long been considered a
very difficult tooth movement even using headgear£¬and this is
especially so in adult patients. However£¬using SAS mechanics to
achieve distalization of the molars£¬it is now possible to correct even
severe crowding£¬upper protrusion£¬anterior crossbite£¬and asymmetric
dentition without premolar extraction and without the need for constant
patient cooperation. (Fig. C and D)
123 Junji Sugawara£¬DDS£¬PhD: A Bioefficient Skeletal Anchorage System