en Original Original <p dir="ltr" style="text-align: justify;">Although the delayed exfoliation of primary teeth among children is a common dental&nbsp;problem, simultaneous presence of primary teeth and corresponding successors is a rare feature&nbsp;in adults. This paper reports an unusual case in which both permanent teeth (molars, premolars,&nbsp;and canines) and primary teeth were present simultaneously. This report describes questions&nbsp;concerning the etiology of overretention of primary teeth.</p> Permanent dentition, Deciduous teeth, Tooth exfoliation 145 147 http://anatomyjournal.ir/browse.php?a_code=A-10-108-2&slc_lang=en&sid=1 Fatemeh Jahanimoghadam fatemehjahani4@gmail.com 10031947532846001189 10031947532846001189 Yes Department of Pediatric Dentistry, Dental School, Oral & Dental Research Center, Kerman University of Medical Sciences, Kerman, Iran. Reihaneh Hosseinifar 10031947532846001190 10031947532846001190 No Department of Pediatric Dentistry, Dental School, Kerman University of Medical Sciences, Kerman, Iran.