Introduction A quantitative assessment of maxillary first molar distalization with and without
the maxillary second molar (M2) was carried out. Methods Fifty-six cervical headgear
patients undergoing fixed appliance orthodontic treatment were divided into 2 groups:
before (G− M2) and after (G+ M2) eruption of the maxillary second molars (ages,
11.87±1.20, and 13.05±1.55 years, respectively). The tightness of the dental contact point
(TDCP) and the space between the second premolar and the maxillary first molar were …