The absence of a tooth in the oral cavity may be the result of some obstruction with the process of tooth eruption. Physical obstruction can result from many different causes, such as supernumerary teeth, mucosal barrier, scar tissue, and cysts or tumors. Their removal will usually permit the affected tooth to erupt. This case report describes the delayed eruption of the permanent mandibular first molar in a 9-year-old boy due to the dentigerous cyst associated with it. The management was done through a multidisciplinary approach. Surgical removal of cystic sac through marsupialization along with the removal of the barrier was done. As a consequence of delayed eruption of the permanent first molar, the opposing tooth had supraerupted, which was intruded using mini-implants. Following this, the tooth erupted satisfactorily into the oral cavity to establish class I molar relation.
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