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Cherry loop: a new loop to move the mandibular molar mesially
No full textAbstract: The aim of this study was to test the clinical
efficacy of a new loop named ‘cherry loop’ in correcting the
Class II relationship by the mesial movement of the first lower
molars in the Tweed–Merrifield technique. We compared the
amount of molar mesial movement in two groups of patients
treated with upper first bicuspid and lower second bicuspid
extractions. The study was conducted using two X-rays, one
before treatment and one after the molars had moved.
Mandibular molars and incisors were traced and their positions
analyzed along a Cartesian coordinate system. Movements
were related to stable structures: lower borders of the
mandible and the symphysis. The cherry loop performance
was compared to that of the shoehorn loop. Cherry loop
averaged 5.25 mm of average mesial movement, whereas the
shoehorn loop yielded only 3.28 mm. The vertical control of
molars was better with the new loop; we had only 1.24 mm of
extrusion compared to 3.24 mm with the usual loop. The
anteroposterior stability of the incisors was better too; we had
1.54 mm of distal movement of the crowns compared to 2.24
mm with the shoehorn loop. A serendipitous finding was that
the occlusal plane could be controlled by the cherry loop. It
can be oriented to best fit the growth pattern. In turn, in the
growing patient, a favorable skeletal response can be
expected
LE IMPLICAZIONI CLINICHE DELL’ELONGAZIONE DEL RAMO MANDIBOLARE (AUMENTO DELL’ALTEZZA VERTICALE NEUROMUSCOLARE)
No full textPRESURGICAL DECOMPRESSION OF MANDIBULAR ANTERIOR DENTITION IN CLASS III MALOCCLUSION BY ALVEOLAR DISTRACTION OSTEOGENESIS
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