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Key Clinical Message: Dental fusion should be included in differential diagnosis when panoramic radiograph reveals changes in tooth shape or size. The use of specialized dental photographic techniques can augment the dentists' knowledge and awareness of such conditions. Dental fusion of impacted teeth may show up as a change in tooth shape and size on the first radiographic examination. This report presents an impacted maxillary third molar fused with a peg‐like distomolar in a 20‐year‐old male. The patient presented with symptoms of localized periodontitis distal to the second molar, and radiographic examination revealed abnormal dental structure of the third molar. Surgical extraction of the impacted molar was the treatment of choice. The final diagnosis of fusion was based on data from ex vivo CBCT, photographs of the extracted tooth, and extracted tooth's sections using polarizing filters. Two‐dimensional radiographs may conceal special dental anatomies. Visualization of such cases using CBCT and dental photography serves to educate dentists and reduce postoperative complications. Knowledge and awareness of possible dental abnormalities are of utmost importance for successful treatment planning. [ABSTRACT FROM AUTHOR]

Aim To describe combined endodontic, surgical and orthodontic treatment of a maxillary lateral incisor fused with a supernumerary. Double tooth is a dental irregularity consequent to fusion of two or more teeth or dental gemination. The teeth most commonly involved are deciduous, but in 0.1% of cases permanent teeth are affected, in which case aesthetic, functional and periodontal problems can result. This paper reports a clinical case of a double tooth in the position of the maxillary right lateral permanent incisor. Combined orthodontic, endodontic and surgical treatment (intentional replantation) allowed the tooth to be retained without periodontal compromise and with a positive orthodontic result both immediately and 6 years following intervention. Key learning points •A conservative approach that addresses periodontal, pulpal and tooth tissues, can result in the retention of a double tooth. •Maintenance of the root and alveolar bone in young adults at least until full skeletal maturation should be the main treatment objective. [ABSTRACT FROM AUTHOR]

Aim To present a case with various morphological irregularities requiring root canal treatment and to discuss the problems and options for orthograde root canal treatment. Root canal treatment of a double tooth presenting with an acute alveolar abscess is described. The anatomical variations of this tooth included double tooth, dental invagination, incomplete apical closure, three root canal systems and an internal lacuna . The tooth was treated nonsurgically with orthograde root canal treatment resulting in nearly complete radiographic apical repair after 4 years. Key learning points •Double teeth occur infrequently and may be distinguished from fusion, gemination, concrescence and dental twinning. •Several malformations may be present in a single tooth. •Orthograde root canal treatment may be an adequate treatment option even in teeth with a complex internal anatomy. [ABSTRACT FROM AUTHOR]

Case report Developmental anomalies in permanentmolars frequently require surgical intervention. A case of a mandibular third molar fused with a fourth molar which was successfully treated with conservative endodontic therapy is reported. [ABSTRACT FROM AUTHOR]

In this article we report a case of a mandibular lateral incisor in which 3 separate root canals were located. Clinical and radiographic examinations suggested that fusion had occurred between the mandibular incisor and a supernumerary tooth. The endodontic management of the tooth is described, and repair of an apical periodontitis had occurred after 9 months. [ABSTRACT FROM AUTHOR]