The aim of this retrospective study was to determine differences between the outcomes of treatment using implant anchorage compared with straight-pull headgear and intermaxillary elastics in bimaxillary protrusion patients. The lateral cephalograms of 28 adult orthodontic patients (3 males and 25 females; age, 24.9 ± 5.0 years) who had an Angle Class I malocclusion with bimaxillary protrusion w...

INTRODUCTION The aim of this prospective clinical study was to evaluate the skeletal, dentoalveolar, and soft-tissue effects of maxillary protraction with miniplates compared with conventional facemask therapy and an untreated Class III control group. METHODS Forty-five subjects who were in prepubertal or pubertal skeletal growth periods were included in the study and divided into 3 groups of...

miniscrews reportedly have failure rates as high as 10-30%.1-4 Miniscrew loosening or tipping can result from any of the following factors: • Insufficient bone quantity or quality at the insertion site.5-7 • Use of a screw of inadequate diameter or length.3,8-10 • Inappropriate intraosseous design.10-12 • Root contact during insertion.13 • Manipulation by the patient’s fingers or tongue.8 • Poo...

Nesprin 1 is an outer nuclear membrane protein that is thought to link the nucleus to the actin cytoskeleton. Recent data suggest that mutations in Nesprin 1 may also be involved in the pathogenesis of Emery-Dreifuss muscular dystrophy. To investigate the function of Nesprin 1 in vivo, we generated a mouse model in which all isoforms of Nesprin 1 containing the C-terminal spectrin-repeat region...

INTRODUCTION Early Class III treatment with reverse-pull headgear generally results in maxillary skeletal protraction but is frequently also accompanied by unfavorable dentoalveolar effects. An alternative treatment with intermaxillary elastics from a temporary anchorage device might permit equivalent favorable skeletal changes without the unwanted dentoalveolar effects. METHODS Six consecuti...

For many years, orthodontists have searched for a form of anchorage that does not rely on patient cooperation, although the answer already lay in the implants dentists used to replace missing teeth and oral surgeons used to hold bone segments together. Now these divergent lines have come together in the form of stationary anchorage, and titanium is the most biocompatible material. State-of-the-...

OBJECTIVE An appliance was designed to increase the cortical bone surface contact area of miniscrew implants (MSIs). The purpose of this in vitro study was to evaluate the effects of this appliance on the anchorage force resistance and the stability of orthodontic MSIs. MATERIALS AND METHODS A total of 48 MSIs were placed into bone specimens prepared from the ilium of bovines. Half were place...

Diagnosis A 12-year-old male in the late mixed dentition was referred by his dentist for orthodontic treatment. Initial examination revealed a skeletal and dental Class II malocclusion with a retrognathic mandible, a severe overbite, moderate overjet, and mild malalignment of both arches, including rotations and generalized spaces in the mandibular arch (Fig. 1). The facial type was hypodiverge...

1Department of Orthodontics, School of Dentistry, Kyung Hee University, Seoul 130-701, Republic of Korea 2Department of Orthodontics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul 110-749, Republic of Korea 3Division of Orthodontics, Department of Orofacial Science, University of California, San Francisco, CA 94143, USA 4Department of Orthodontics, Center f...