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The preservation of osseointegration is fundamental for the long-term success of dental implants. Breakdown of osseointegration may occur in cases of aseptic implant loosening, a poorly understood process leading to sudden implant failure. So far, no evidence-based therapy concept exists for implants with aseptic loosening. The present case report demonstrates the re-osseointegration of a dental implant in the mandible of a 79-year-old female patient with mamma carcinoma after loss of osseointegration caused by aseptic loosening. The only treatment performed was a correction of the occlusion. After a period of eight months, a re-osseointegration was observed clinically and radiographically, and remained stable for the follow-up period of 21 months. Reduction of occlusal forces after correction of the occlusion may have facilitated a re-osseointegration. Potential influences of concurrent antineoplastic chemotherapy regarding breast carcinoma or further unknown influences on implant re-osseointegration cannot be ruled out.

There is widespread knowledge that the mental foramen or incisive foramen can be projected onto tooth roots in conventional radiographs, thus simulating apical lesions. In contrast, the anatomical structure of the canalis sinuosus and its branching canals in the anterior maxilla are less known. Sometimes these bone canals mimic a dentino- or osteolysis on conventional radiographs. If these bone canals project onto the roots of the anterior maxillary teeth, there is a risk of misinterpretation as root resorption or apical periodontitis. This case report presents an incidental radiological finding. Due to a radiolucency within the root of tooth 11, root resorption was suspected. Using cone beam-computed tomography, the origin of this radiolucency was clearly identified as an anatomical structure, and the suspected diagnosis was ruled out. This case highlights the importance of the knowledge of anatomical structures to avoid misinterpretations and unnecessary treatments.