Physiologic Midtreatment Tooth Movement as a Correction Strategy for Iatrogenic Root Exposure.

In the case report showcased, we describe orthodontic treatment of a female patient with an excessive gingival display on smiling and severe dental crowding, with maxillary canines positioned excessively buccal (ectopic) to and in near transposition to the lateral incisors. The treatment involved extractions and initial use of unmitigated forces leading to excessive gingival thinning and buccal root positioning of the ectopic canines. Eventually, the root position was corrected and periodontal equilibrium was attained.

Treating a severe iatrogenic gingival exposure and lip incompetence - a challenge worthwhile.

This case reports the retreatment of a young adult who had a previous orthodontic history of inappropriate biomechanical strategies leading to iatrogenic effects with the formation of a dual occlusal plane causing anterior dental extrusion. As a result, an already severe dento-skeletal malocclusion with a vertical growth pattern, severe gummy smile, increased overjet and a very deep bite along with procumbent and incompetent lips became exaggerated. The high smile line and heavy convex profile were changed to an average smile line and a straight profile by intruding the anterior maxillary segment with anterior miniscrew anchorage and retracting the whole maxillary arch using IZC screws posteriorly.

A Novel Temporary Anchorage Device Aided Sectional Mechanics for Simultaneous Orthodontic Retraction and Intrusion.

Closing spaces on light wires with inadequate knowledge and inappropriate mechanics can cause a "roller coaster" effect leading to an improper occlusion. Current knowledge of biomechanics, along with the incorporation of TADs, has made this process less challenging and more predictable. Resistance to sliding is considered the most prominent inhibitor of space closure in archwire-guided space closure or sliding mechanics, in turn delaying treatment duration considerably.