1993 Volume 31 Issue 5 Pages 936-942
Cases of impacted permanent teeth have been often observed. However, cases of impacted deciduous teeth are rare. An 8-year 8-month old girl (Case 1)and a 7-year 5-month old girl (Case 2) visited the Department of Oral and Maxillofacial Surgery at Kagawa Medical school complaining that the lower right second deciduous molars had not erupted.
Clinical examination and x-rays showed, the grems of the lower right second deciduous molars were impacted in the mandibule in both cases too, but it was not noted that these axes were inclined. Also these germs of the lower first molars of the affected site were inclined to the mesial site and they were deficiented in the eruptional space of lower second deciduous teeth. Further the germ of the lower second premolar which was a succedaneous permanent tooth, was located in the distal region of the impacted tooth, in Case 2. In both of these cases, the history of present illnesses and family histories, even in a general sense, showed absence of abnormal findings. We therefore considered that impactions of E occured due to by special causes.
We extracted the impacted E and marsupialized 5 in these two cases. For regaining of the eruptional spaces of 5, in case 1, the space was regained using in active plate, sectional arch and cross elastic system. In case 2, the space was regained by a direct-bonding system with power chains.
