Introduction:Teeth that exceed the average number are referred to as supernumerary teeth. Although the exact reason of an excess teeth is unknown, it is thought that both hereditary and environmental factors are involved. Mesiodens, or extra teeth, are most frequently found in the maxillary midline (1). According to reports, the frequency of mesiodens ranges from 0.1% to 7.0% (2). A number of issues, including diastema, crowding, resorption of the roots of nearby permanent teeth, dentigerous cysts, and problems with maxillary incisor eruption, can result from mesiodens. Morphologically, mesiodens may have heterogeneous forms. Three common types have been described: conical or peg-shaped, bulbous, and supplementary (tooth-shaped), of which conical is the most common (3). Surgery will be more difficult if the inverted mesiodens is not found quickly. Therefore, it is essential to identify the mesiodens in advance and extract it at the right time to avoid such problems (4).Pre-eruptive intracoronal dentine radiolucency/resorption (PEIR) is defined as a well-bounded, irregular, radiolucent range that extends into distinct dentinal profundities in unerupted teeth and is located inside the coronal section of the tooth, close to the dentin-enamel junction (5). This disorder may be a rare anomaly that affects both primary and permanent dentitions. These abandoned cases were referred to as ”pre-eruptive caries” or ”hidden caries” in the past, since they were not visible. During normal dental radiography examinations, these injuries are often discovered unintentionally, and around 61% of dentists are aware that PEIR can be misdiagnosed (6). The type of radiograph used for assessment, age, sex, and dentition type all affect the occurrence of pre-eruptive caries in teeth, which ranges from 0.25 to 3.5%. Pre-eruptive caries lesions have been commonly seen in molars and premolars. Involvement in one tooth is more often, but cases with several teeth have also been reported (7).Although odontomas can occur at any age, the majority are discovered during the first 20 years of life. Most lesions are seen on regular radiographs, and there is no preference for one gender over another (8). Although afflicted patients rarely exhibit clinical symptoms, they may do so when a permanent tooth or more teeth fail to erupt. Odontomas can occasionally protrude into the oral cavity (9). Complex odontomas seem to favor the posterior mandible, whilst compound odontomas are more frequently detected in the front maxilla. Although odontomas are usually minor, they can occasionally enlarge and cause the bone to expand (10).This paper reports a case involving the presence of a mesiodens in the maxillary midline, a complex odontoma in the right mandible, and radiolucency in the crown region of six unerupted teeth, which is suspicious for pre-eruptive caries.