1. Site-specific radiation dosage and implant survival in oral cancer patients: A cohort study.
- Author
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Alberga JM, Vissink A, Korfage A, de Visscher SAHJ, Witjes MJH, Langendijk JA, and Raghoebar GM
- Subjects
- Humans, Male, Female, Middle Aged, Aged, Retrospective Studies, Alveolar Bone Loss etiology, Alveolar Bone Loss diagnostic imaging, Dental Restoration Failure, Mouth Neoplasms radiotherapy, Mouth Neoplasms surgery, Radiotherapy, Intensity-Modulated, Dental Implants, Radiotherapy Dosage
- Abstract
Objectives: We assessed the radiation dosages (D
mean ) on implant regions to identify the threshold for implant loss in patients with an intraoral malignancy treated with dental implants to support a mandibular denture during ablative surgery before volumetric-modulated arc therapy (VMAT)., Materials and Methods: Data was collected prospectively from 28 patients treated surgically for an intraoral malignancy, followed by postoperative radiotherapy (VMAT) and analyzed retrospectively. Patients received 2 implants in the native mandible during ablative surgery. Implant-specific Dmean values were retrieved from the patients' files. Radiographic bone loss was measured 1 year after implant placement and during the last follow-up appointment. Implant survival was analyzed with the Kaplan-Meier method. Univariate logistic regression and Cox-regression analyses were performed to investigate the effect of increasing implant-specific radiation dosages on implant loss., Results: Five out of 56 placed implants were lost during follow-up (median 36.0 months, IQR 39.0). Radiographically, peri-implant bone loss occurred in implants with a Dmean > 40 Gy. Implant loss occurred only in implants with a Dmean > 50 Gy., Conclusion: An implant-specific Dmean higher than 50 Gy is related to more peri-implant bone loss and, eventually, implant loss., (© 2023 The Authors. Oral Diseases published by Wiley Periodicals LLC.)- Published
- 2024
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