Abstract
Open oro-nasal defects resulting after oral tumor resection need structural and functional rehabilitation using dental prostheses. Conventional removable prostheses have usually been indicated and performed for prosthodontics. When the patient has an edentulous maxilla, the unfavorable stability of the prosthesis will cause dysfunction of mastication and pronunciation. To achieve improvement of the impaired functional situation, implant-supported full fixed prostheses (IPSPs) for the edentulous maxilla with a removable obturator offer a reasonable solution. We present herein the case of a 70-year-old Japanese man who has presented with oro-nasal defect due to surgical procedures for oral cancer. He was treated with implant-supported full fixed prostheses in a conventional two-step procedure. After prosthesis treatment, a palatal obturator was set. The patient has shown no clinical or radiological evidence of failure as of 24 months after the end of treatment. Functional evaluation of mastication and pronunciation showed dramatic improvements. For a patient with an edentulous maxilla and palatal fistula, full-arch fixed prostheses supported by a combination of axially and non-axially positioned implants and a removable oro-nasal obturator, using the anterior alveolar bone, without bone transplantation or maxillary sinus elevation, could offer an effective, minimally invasive treatment alternative.
Highlights
Open oro-nasal defects, resulting from the resection of oral tumors need structural and functional rehabilitation using dental prostheses
We present the case of a patient, treated using implant-supported full fixed prostheses (ISFPs) with a removable oro-nasal obturator for an edentulous maxilla with palatal fistula due to surgical procedures for oral cancer
He had undergone surgery for maxillary gingival cancer in May 2012, which had resulted in an edentulous maxilla with palatal fistula
Summary
Open oro-nasal defects, resulting from the resection of oral tumors need structural and functional rehabilitation using dental prostheses. Recent several clinical studies have reported that tilting of the implants may represent another practical treatment option Such technique is related to several surgical and prosthetic ad-vantages, such as the possibility of placing long implants with improvement of bone anchorage, the reduction of the need for the maxillary sinus lifting, the improvement of the distribution of implant loading force. No difference in the marginal bone loss between tilted and axially placed implants has been reported These treatment therapies showed the excellent result of implant survival rate and prosthesis survival rate [3]. We present the case of a patient, treated using implant-supported full fixed prostheses (ISFPs) with a removable oro-nasal obturator for an edentulous maxilla with palatal fistula due to surgical procedures for oral cancer
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