Craniomaxillofacial Changes Using High-Pull J-Hook Headgear and Mini-Implant Anchorage in Adolescents: A Structural Superimposition Method.

Objective: The aim of this study was to compare the craniomaxillofacial changes when using high-pull J-hook headgear (HPJH) and mini-implants (MIs) as maxillary anchorage in adolescents.

Study Design: 40 female adolescents with dentoalvolar protrusion were divided into 2 groups; the HPJH group (n=20) and the MI group (n=20). Lateral cephalograms taken before treatment (T0) and after anterior tooth retraction (T1) were superimposed on the stable structures and then craniomaxillofacial changes were evaluated.

Nonextraction treatment of an open bite with microscrew implant anchorage.

A 16-year-old girl with an anterior open bite was treated with nonextraction therapy that included intrusion of the maxillary and mandibular posterior teeth with microscrew implants. Implants (diameter, 1.2 mm; length, 8 or 6 mm) were placed into alveolar bone near the posterior teeth and used as anchorage for intrusive force.

Microscrew implant anchorage sliding mechanics.

Aim: To show the effectiveness of sliding mechanics used with microscrew implants in managing a dentoalveolar protrusion. There are several advantages, including reduced treatment time, simplified treatment mechanics, early profile changes, and elimination of interarch mechanics.

Material And Methods: A step-by-step procedure for microscrew implant anchorage sliding mechanics is shown, with records of treated patients, which demonstrate the aforementioned advantages of this technique.

Simultaneous incisor retraction and distal molar movement with microimplant anchorage.

Aim: To show how microscrew implants provide orthodontic clinicians with several advantages, eg, the elimination of interarch mechanics for correcting sagittal discrepancies, the reduction of treatment time, the simplification of treatment mechanics, the correction of midline discrepancies without interarch mechanics, and the ability to move entire quadrants rather than individual teeth.

Material And Methods: A step-by- step procedure for inserting microscrews is shown, along with several treated patients, which together demonstrate the mentioned advantages of this technique.

Results: The authors show how microscrews can rescue treatments that have achieved less than ideal occlusion during the course of therapy and offer readers explicit instructions for placing these microimplants.

Nonextraction treatment with microscrew implants.

The maxillary and mandibular posterior teeth were retracted with microscrew implants (1.2 mm in diameter and six to 10 mm long) that were placed into the alveolar bone and used as anchorage. The retraction proceeded without adverse reciprocal effects on the reactive part of the conventional mechanics, such as premolar extrusion and flaring of the incisors.

BMP-2-induced Runx2 expression is mediated by Dlx5, and TGF-beta 1 opposes the BMP-2-induced osteoblast differentiation by suppression of Dlx5 expression.

Intramuscular injection of BMP-2 induces ectopic bone formation in vivo. Similarly, BMP-2 treatment blocks myogenic differentiation and induces osteoblastic transdifferentiation of premyoblastic C2C12 cells. Previous reports suggested that BMP-2-stimulated Runx2 expression could play a pivotal role in transdifferentiation.

Ultimate anchorage control.

Titanium microscrews represent an exciting new modality for orthodontic treatment. Retraction, protraction, intrusion and extrusion of anterior and posterior teeth can occur without harmful side effects on adjacent teeth and without reliance on patients' cooperation in wearing elastics, facemasks, or headgears. There are no moving parts in the mechanism, and movements in one jaw occur independently or the other.