Treatment of dental implant displacement into the maxillary sinus / 대한악안면성형재건외과학회지

BACKGROUND: Displacement of dental implants into the maxillary sinus is rare, but it primarily occurs in patients with severe pneumatization of the maxillary sinus and/or deficiency of the alveolar process. Some complications such as the infection of the paranasal sinuses and formation of the oroantral fistula can be followed by the displacement of a dental implant. Therefore, the displaced implant has to be removed immediately with surgical intervention show and another plan for rehabilitation should be considered. MAIN BODY: The conventional procedure for the removal of a displaced implant from the maxillary sinus involves sinus bone grafting and new implant placement performed in two or more steps with a significant time gap in between. Simplification of these surgical procedures can decrease the treatment duration and patient discomfort. CONCLUSIONS: In this review, we discuss the anatomical characteristics of the maxillary sinus and the complications associated with implant displacement into the sinus.

Case Study of Secondary Operation in Blowout Fracture for Correction of Implant Displacement

The operative treatment of orbital blowout fracture involves restoration of intra-orbital soft tissue and bony structural integrity. In extensive blowout fracture cases, inadequate dissection inappropriate implant insertion, postoperative edema and subsequent increase of intraorbital pressure may sometimes lead to displace the implant. This case study was performed on 6 patients who underwent secondary blowout fracture operation. After primary blowout fracture reduction operation, we found severely displaced implant in the postoperative computed tomogram study. The most prevalent sites were the posterior portion of the inferior and medial wall. We performed further dissection of the fracture sites and inserted more larger sized implant than before. Then we fixated the implant to prevent postoperative displacement. Among these patients, 3 patients who operated more than 3 months after the first operation, complained residual diplopia and eyeball movement disorder. These clinical cases have troublesome and unique features, so we report our experiences with review of the literatures.