Abstract
BackgroundTo evaluate the evolution of patients rehabilitated with endosseous implants after oral cancer treatment.Material and MethodsAn observational retrospective study was carried out between 1991 and 2011 with a sample consisting of patients with oral cancer who had been referred for rehabilitation to the Prosthetics Rehabilitation Unit from the Oral and Maxillofacial Surgery Unit of the Virgen del Rocío University Hospital. All these patients have overcome oral cancer, and have a five-year follow-up after their oral rehabilitation. Age, sex, smoking habits, oral pathology, type of treatment of oral pathology, edentulism, receptor bone, prosthetic rehabilitation, timeouts, working time and evolution were studied. SPSS Statistics was used for statistical analysis of the variables studied. A chi-square test centered on the survival rate of implants placed in relation to the other recorded variables was performed.Results17 patients were treated for cancer and rehabilitated with implant prosthetics, with a total of 106 implants placed. 32% were partially edentulous patients (4 patients), and 68.2% were completely edentulous patients (13 patients). An implant survival rate of 87.7% was observed at 5 years. In the upper maxilla, the survival rate was 79.2%, and in the mandible 93.7% (p = 0.03). 91 implants were placed in native receptor bones (85.8%), with only 15 implants placed in grafted receptor bone (14.2%). According to the type of receptor bone, in native receptor bones, 9 implants failed (90.1% of implant survival), while in grafted receptor bones, 4 implants failed (overall 73.3% implant survival rate) (p = 0.08).ConclusionsAlthough a high survival rate was obtained in this study (with lower survival rates seen in mandible and grafted bone), prospective long-term studies are needed to assess the relationship between radiotherapy doses and the time required for implant placement, prosthetic protocol used, and type of implants used in patients selected for prosthetic rehabilitation. Key words:Dental implant, oral cancer, survival.
Highlights
Implantology has led to significant changes in the planning of prosthetic rehabilitation, mainly in patients who have suffered anatomical alterations after surgical treatment of cancer [1,2,3]
The objective of this study was to evaluate the evolution of patients rehabilitated with endosseous implants after treatment of oral pathology referred to the Unit of Prosthetic Rehabilitation of the University Hospital Virgen del Rocío between 1991-2011
The pre-prosthetic variables studied in patients are shown by age in Table 1, while the post-surgical variables are found in Table 2 and 3
Summary
Implantology has led to significant changes in the planning of prosthetic rehabilitation, mainly in patients who have suffered anatomical alterations after surgical treatment of cancer [1,2,3]. The placement of implant-assisted rehabilitation prostheses in patients with cancer has shown a high degree of satisfaction and there are numerous advantages: they require a smaller number of implants, facilitate oral hygiene, make it easier to obtain greater occlusal stability and good distribution of occlusal forces, and are a less expensive treatment. These prostheses help restore deficiencies in white and hard tissue without need for additional surgeries [12]. Conclusions: a high survival rate was obtained in this study (with lower survival rates seen in mandible and grafted bone), prospective long-term studies are needed to assess the relationship between radiotherapy doses and the time required for implant placement, prosthetic protocol used, and type of implants used in patients selected for prosthetic rehabilitation
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