<prompt> Which primary tooth is generally accepted as the first to erupt, and at about what mean age?Maxillary central incisor, 8 to 12 months.Maxillary central incisor, 7 to 9 months.Mandibular central incisor, 7 to 9 months.Mandibular central incisor, 8 to 10 months.  <response>: Eruption for the primary mandibular central incisor may be given as 6 months Woelfel and Scheid, 2002; 6.5 months Kraus et al., 1969; 7.5 monthsCharlick et al.; or 8 6 to 10 months Ash andNelson, 2003. 