children dentition duration "double tooth" how to do

Length of time the child dentition "double tooth" how to do? The tooth replacement, permanent teeth have erupted and no normal shedding of deciduous teeth, there will be "double tooth" situation. "Double tooth" phenomenon is most common in the lower front teeth replaced. In the absence of the normal shedding of deciduous occupy permanent dental x ray unit positions, a new eruption of permanent teeth can not be ranked in the normal position of the dentition, often in the lingual dentition, resulting in tooth malalignment. At this point, should be promptly removed without the normal shedding of deciduous teeth, eruption of the permanent teeth with the power to go back dentition.