Preliminary feasibility torque mechanical evaluation for 3D printed orthodontic springs with different parameters: in vitro study.

Background: The purpose of the presented investigation is to evaluate the resulting torque on loaded 3D printed springs using different coil thickness and length.

Methods: Specimens were designed and printed using the 3D printer MAX (Asiga, Sydney, Australia) with 3D printable, experimental, flexible material (Code:BM2008, GC, Tokyo, Japan). The specimens were divided into three groups according to spring coil design.

Comparative Study between the Overall Production Time of Digitally Versus Conventionally Produced Indirect Orthodontic Bonding Trays.

Objective: The purpose of this study was to compare the production time for indirect digitally and laboratory-produced orthodontic bonding trays.

Methods: Orthodontic study casts were used in this study (n=40). The specimens were equally and randomly divided.

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.