Segmental Mushroom loop for individual canine retraction in the maxillary and mandibular arch - A case series

Segmental retraction of the canine with the mushroom loop spring in severely crowded cases may help avoid round tripping of the maxillary anterior teeth that is commonly associated with continuous mechanics.

Aim.
To describe the biomechanical principles on space closure with the mushroom loop spring in different clinical scenarios.

Case series.
The maxillary and mandibular anterior teeth had crowding in the first case and proclination in the second case. All the maxillary first premolars were extracted in both the cases and individual canine retraction was done with segmental M loop spring. In the third case there was an end on molar relation on the left side with crowding of the maxillary and mandibular anterior teeth. The maxillary first premolars were extracted and individual canine retraction was done in all the quadrants except the left lower quadrant were the second premolar was extracted and molar protraction was done with a segmental M loop spring.

Results.
In the first case translation of the canines were achieved in all four quadrants. In the second case, there was translation of both the maxillary canines with mild distal tipping of the mandibular canines. In the third case molar protraction was achieved in the lower left quadrant along with translation of the canines.

Summary.
The clinical outcome was favorable. The segmental M loop spring can be used in different clinical scenarios with a positive outcome.