The Application Of Digital Radiotherapy Oral-Positioning-Stents In China

To develop a designing software of digital oral positioning stent for radiotherapy of head and neck, and to evaluate its clinical effect. 30 patients with nasopharyngeal cancer who received oral examination before radiotherapy in the prosthodontics department from July 1, 2021 to December 31, 2021, were randomly selected and divided into three groups according to the patients' wishes,10 per group: one group without radiotherapy oral positioning stents, one group with traditional radiotherapy positioning stents, and another group with digital radiotherapy positioning stents. The manufacturing time and comfort of the two positioning stents were evaluated, and the radiation doses of the radiotherapy target areas and surrounding healthy tissues were statistically analyzed at the end of radiotherapy. The manufacturing time of digital oral positioning stents(209±7.38 min)was much less than that made of traditional manufacturing method(490±10.33 min), p<0.01.The comfort of patients' wearing digital stents(First wearing:4.9±2.21, At the end of radiotherapy:4±1.56) was better than that of traditional ones(First wearing:7.2±2.10, At the end of radiotherapy:6±2.28), p<0.05. Oral positioning stents for nasopharyngeal carcinoma radiotherapy could greatly reduce the exposure dose of tongue and madible of patients. Digital oral positioning stents designed and manufactured by independently developed software had higher production efficiency than the traditional method, and patients’ comfort to wear was better.