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. 2015 Apr 15;8(4):4826-36.
eCollection 2015.

Displacement of a dental implant into the maxillary sinus after internal sinus floor elevation: report of a case and review of literature

Xiaojun Ding  1 , Qing Wang  1 , Xuehua Guo  1 , Youcheng Yu  1
Affiliations

Displacement of a dental implant into the maxillary sinus after internal sinus floor elevation: report of a case and review of literature

Xiaojun Ding et al. Int J Clin Exp Med. .

Abstract

Background: Dental implant placement in the posterior maxilla may be complicated by implant migration into the maxillary sinus.

Purpose: To report the clinical and radiological characteristics of a patient who experienced dental implant displacement into the maxillary sinus following sinus floor elevation, and to compare our findings with those of other published reports of the displacement of dental implants.

Materials and methods: Implant placement and maxillary sinus elevation were performed simultaneously. The location of the displaced implant was monitored for 8 years, until the ectopic implant was surgically removed using the lateral window approach. The contributing factors, treatment modality, and clinical outcome for our patient were compared with those of patients reported in the literature.

Results: The clinical characteristics of our case were similar to those of patients with displaced implants who were also asymptomatic for long periods. The clinical outcome of our case was consistent with that of patients who underwent similar surgeries.

Conclusions: Transnasal endoscopic removal of an ectopic implant may be suitable in cases in which the ectopic implant is accessible. Transoral direct approaches are adequate in most cases in which endoscopic approaches may be confounded. The bony-window transoral technique may allow the removal of large implants.

Keywords: Maxillary sinus; bony-window transoral technique; dental implant placement; sinus floor elevation.

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Figures

Figure 1
Figure 1
Panoramic radiograph showing the implant following maxillary sinus elevation. A tooth-supported fixed prosthesis had been installed previously from the right mandibular canine to the third molar. The restored occlusal surface of the mandibular right third molar was higher than the right-side functional occlusal plane.
Figure 2
Figure 2
Panoramic radiograph recorded 3 months after implant placement. The loss of opacity near the neck of the right second molar implant indicated bone loss, and was more conspicuous than that detected at the 6-month follow-up examination. The right second molar implant exhibited an apical shift and distal tilting.
Figure 3
Figure 3
Panoramic radiograph recorded 6 months after implant placement. The loss of opacity near the apex of the right second molar implant indicated bone loss and the bone graft had been lost completely.
Figure 4
Figure 4
Panoramic radiograph recorded 6 months after implant placement showing the ectopic implant in the maxillary sinus following the attempt to remove it.
Figure 5
Figure 5
Panoramic radiograph recorded 1 year after the displacement of implant into the maxillary sinus.
Figure 6
Figure 6
Panoramic radiograph recorded 5 years after the displacement of implant into the maxillary sinus.
Figure 7
Figure 7
Cone-beam computed tomography (horizontal cross-section) image recorded 7.5 years after the displacement of implant into the maxillary sinus.
Figure 8
Figure 8
Cone-beam computed tomography (horizontal cross-section) image recorded 8 years after the displacement of implant into the maxillary sinus.
Figure 9
Figure 9
Cone-beam computed tomography (vertical cross-section) images recorded 6 months after the removal of the implant.
Figure 10
Figure 10
Treatment options for removal of ectopic dental implants from the maxillary sinus.
See this image and copyright information in PMC

References

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