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The dentigerous cyst is frequent in children under 12 years old. Surgical marsupialization or decompression are actually the most two conservative treatment option described for the management of dentigerous cyst with the preservation of involved teeth. we report two clinical cases of dentigerous cysts treated successufelly by decompression

The dentigerous cyst is the second most common odontogenic. The prevalence rates ranging from 0.8% to 3.6% in the general population. It affects people especially at the second and third decade of life with a male predilection. It presents a preference for the mandibular region particularly for the second lower premolar. Surgical marsupialization or decompression are the most conservative treatment modalities as it prevents the risks of cyst removal as nerve injuries and preserves the unerupted tooth. Two clinical cases of two young patients presenting a dentigerous cyst involving impacted teeth, which were successfully treated by decompression will be reported in order to highlight the benefits and limits of cyst decompression as well as detailing its operating protocol and its instructions.

Regional odontodysplasia (RO) in permanent teeth is a rare developmental anomaly of mineralized tissues. Three‐dimensional images and data from CBCT allowed to provide useful information on the degree of tooth calcification and consequently confirm the diagnosis of RO and establish a treatment strategy to minimize future damages and sequels.

Severe intrusion injuries of primary teeth are frequently associated with serious developmental disorders. This report describes the diagnostic procedures and the multidisciplinary approach for multiple sequelae to permanent incisors due to a severe intrusive injury of the primary maxillary anterior teeth at the age of 18 months in a 7‐year‐old girl. Clinical examination revealed hypoplasia of tooth 22, and radiographic examination showed crown‐root malformation of tooth 21, impaction of tooth 11, and the presence of an odontoma‐like malformation on tooth 12. The affected tooth 12 had a poor prognosis, as highlighted by CBCT, and it was extracted. While for the impacted 11, a surgical extraction followed by an orthodontic treatment is scheduled. Aesthetic and functional problems were solved by a functional space maintainer using a removable partial denture. The occurrence of multiple abnormalities in permanent teeth as a result of intrusive injuries in the primary dentition enhances the need for creating awareness among dentists not only of the importance of appropriate immediate management of trauma but also of the importance of establishing a long‐term follow up and subsequent management of any sequelae.