Correction of ectopically placed canine by combining skeletal anchorage and statically determinate force system

Spider Screw: skeletal anchorage system.

The stability of the anchorage unit plays a very important role in orthodontic control. Controlled orthodontic movements such as retraction and/or protraction of teeth and intrusion of overerupted teeth are very difficult to achieve without patient cooperation and without causing undesirable reciprocal movement in the anchorage unit. The article describes characteristics, surgical procedure, an...

Skeletal anchorage for Class II correction in a growing patient.

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...

When is an ectopically placed ureteral stent acceptable?

*E-mail: [email protected] We report a rare case of an ectopically placed ureteral stent, which was acceptable and functional. obstructing 8 × 15-mm proximal right-sided ureteral calculus. There were also multiple nonobstructing renal calculi on the left side. An antegrade ureteral stent was placed to relieve his infected and obstructed right kidney. During stent placement, the interventional ra...

Effects of the zygoma anchorage system on canine retraction.

The aim of this study was to compare the effects of the Gjessing (PG) retraction spring used with and without the zygoma anchorage system (ZAS) on canine retraction. Thirty patients, with an Angle Class I or Class II malocclusion, whose upper first premolars were scheduled for extraction, were divided into two equal groups. Group 1 comprised maximum anchorage cases (nine females and six males w...

Module2: Analysis of statically indeterminate structures by matrix force method