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01.12.2016 | Case report | Ausgabe 1/2016 Open Access

Journal of Medical Case Reports 1/2016

Removal of dental implant displaced into maxillary sinus by combination of endoscopically assisted and bone repositioning techniques: a case report

Journal of Medical Case Reports > Ausgabe 1/2016
Shinnosuke Nogami, Kensuke Yamauchi, Yuji Tanuma, Kenji Odashima, Aritsune Matsui, Kenko Tanaka, Tetsu Takahashi
Wichtige Hinweise

Competing interests

The authors declare that they have no competing interests in regard to this study.

Authors’ contributions

SN, KY, YT, and TT performed the clinical work, described the operation, and follow-up examinations of the patient. SN, KO, AM, and KT drafted the manuscript. SN, KO, and KT participated in the literature review and revising of the manuscript. All authors read and approved the final version of the manuscript.



Accidental displacement of a dental implant into the maxillary sinus is an infrequent although not uncommon complication encountered in dental clinical practice, with the main cause thought to be inadequate bone height in the posterior maxilla. We report a case of migration of a dental implant into the maxillary sinus, and discuss the benefits of its removal by a combination of endoscopically assisted and bone repositioning techniques.

Case presentation

A 35-year-old Japanese man with a partially edentulous maxilla underwent implant placement at a private clinic. Three months later, at the time of abutment connection, the implant at the site of his maxillary right first molar was accidentally pushed into the sinus. The hole on the alveolar ridge made for placement of the implant was small and far from the dislocated implant, thus access was achieved in a transoral manner via the frontal wall of his maxillary sinus with an endoscopic approach. Piezoelectric instruments were used to perform an osteotomy. The bone lid was removed, and the implant was identified using a rigid endoscope and removed with a surgical aspirator, followed by repositioning of the bony segment; the area was secured with an absorbable suture. Removal of migrated implants should be considered in order to prevent possible sinusal disease complications.


In the present case, removal of a dental implant displaced into the maxillary sinus by use of a combination of endoscopically assisted and bone repositioning techniques proved to be a safe and reliable procedure.

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