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Impacted Tooth Management and Osteoradionecrosis Risk in NPC

10 августа 2026 г. обновлено: min kang, First Affiliated Hospital of Guangxi Medical University

Omission of Prophylactic Impacted Tooth Extraction and Risk of Jaw Osteoradionecrosis in Nasopharyngeal Carcinoma: A Multicenter, Noninferiority, Open-Label, Randomized Controlled Trial

This multicenter, randomized controlled trial is designed to determine whether omitting prophylactic extraction of impacted teeth before radiotherapy leads to an unacceptably higher risk of jaw osteoradionecrosis (JORN) compared with conventional prophylactic extraction in patients with non-metastatic nasopharyngeal carcinoma (NPC). JORN is a condition in which jawbone tissue is damaged and fails to heal properly after radiotherapy.

A total of 536 eligible participants with at least one impacted tooth will be randomly assigned to either omit prophylactic extraction of impacted teeth before radiotherapy or undergo conventional prophylactic extraction before radiotherapy. All participants will receive standard curative-intent intensity-modulated radiotherapy (IMRT), with chemotherapy administered when indicated according to the study protocol.

Participants will be followed for up to 5 years. The primary outcome is the incidence of JORN within 2 years after completion of radiotherapy. Secondary outcomes include longer-term incidence of JORN, overall survival, locoregional relapse-free survival, distant metastasis-free survival, quality of life, and treatment-related toxicities.

Обзор исследования

Статус

Еще не набирают

Условия

Вмешательство/лечение

Подробное описание

Prophylactic extraction of impacted teeth before radiotherapy is performed to reduce the potential risk of dental complications and jaw osteoradionecrosis after treatment. However, whether prophylactic extraction is necessary for impacted teeth without indications for therapeutic extraction remains uncertain.

This study is designed to evaluate whether omission of prophylactic impacted tooth extraction is noninferior to conventional prophylactic extraction with respect to the risk of jaw osteoradionecrosis in patients with non-metastatic nasopharyngeal carcinoma undergoing curative-intent radiotherapy. The study will also assess the long-term clinical outcomes and safety of this tooth-management strategy.

Тип исследования

Интервенционный

Регистрация (Оцененный)

536

Фаза

  • Непригодный

Контакты и местонахождение

В этом разделе приведены контактные данные лиц, проводящих исследование, и информация о том, где проводится это исследование.

Контакты исследования

  • Имя: Li Jiang, MD
  • Номер телефона: +86 15994349883
  • Электронная почта: jiangli@sr.gxmu.edu.cn

Учебное резервное копирование контактов

  • Имя: Zhen Meng, MD
  • Номер телефона: +86 15578301825
  • Электронная почта: mengzhen0307@163.com

Места учебы

  • Китай
    • Guangxi
      • Baise City, Guangxi, Китай, 533000
        • Affiliated Hospital of Youjiang Medical University for Nationalities
        • Контакт:
          • Tingzhuang Yi, MD
          • Номер телефона: +86 776-2802090
          • Электронная почта: ytz20070101@163.com
      • Beihai, Guangxi, Китай, 536000
        • Beihai People's Hospital
        • Контакт:
          • Sihui Liao, MD
          • Номер телефона: +86 779 2023316
          • Электронная почта: 13507799365@136.com
      • Guigang, Guangxi, Китай, 537100
        • Guigang People's Hospital
        • Контакт:
          • Yan Wei, MD
          • Номер телефона: +86 15678865869
          • Электронная почта: wyan184@163.com
      • Guilin, Guangxi, Китай, 541001
        • The Affiliated Hospital of Guilin Medical University
        • Контакт:
          • Xin Zhang, MD
          • Номер телефона: +86 773 2833086
          • Электронная почта: zhangxin1262008@126.com
      • Liuzhou, Guangxi, Китай, 545006
        • Liuzhou People's Hospital
        • Контакт:
          • Jingchang Li, MD
          • Номер телефона: +86 18078259868
          • Электронная почта: 549026160@qq.com
      • Liuzhou, Guangxi, Китай, 545007
        • Liuzhou Workers' Hospital
        • Контакт:
          • Ying Lu, MD
          • Номер телефона: +86 772 3815405
          • Электронная почта: 1786734840@qq.com
      • Nanning, Guangxi, Китай, 530021
        • The First Affiliated Hospital of Guangxi Medical University
        • Контакт:
          • Li Jiang, MD
          • Номер телефона: +86 15994349883
          • Электронная почта: jiangli@sr.gxmu.edu.cn
      • Nanning, Guangxi, Китай, 530000
        • The People's Hospital of Guangxi Zhuang Autonomous Region
        • Контакт:
          • Heming Lu, MD
          • Номер телефона: +860771-5722416
          • Электронная почта: luhming3632@163.com
      • Nanning, Guangxi, Китай, 530199
        • Wuming Hospital Affiliated to Guangxi Medical University
        • Контакт:
          • Weiming Zhang, MS
          • Номер телефона: +86 771-6363880
          • Электронная почта: weiming8207@163.com
      • Wuzhou, Guangxi, Китай, 543002
        • Wuzhou Red Cross Hospital
        • Контакт:
          • Jianquan Gao, MD
          • Номер телефона: +86 774 3827268
          • Электронная почта: wzhh13878480321@163.com
      • Yulin, Guangxi, Китай, 537000
        • The First People's Hospital of Yulin
        • Контакт:
          • Leifeng Liang, MD

Критерии участия

Исследователи ищут людей, которые соответствуют определенному описанию, называемому критериям приемлемости. Некоторыми примерами этих критериев являются общее состояние здоровья человека или предшествующее лечение.

Критерии приемлемости

Возраст, подходящий для обучения

  • Взрослый
  • Пожилой взрослый

Принимает здоровых добровольцев

Нет

Описание

Inclusion Criteria:

  • Eastern Cooperative Oncology Group (ECOG) performance status of 0-1.
  • Age 18-75 years, regardless of sex.
  • Histologically confirmed non-keratinizing nasopharyngeal carcinoma, including differentiated or undifferentiated subtype (WHO type II or III).
  • Newly diagnosed, previously untreated nasopharyngeal carcinoma with stage T1-4N0-3M0 according to the 9th edition of the American Joint Committee on Cancer/Union for International Cancer Control (AJCC/UICC) staging system.
  • Presence of permanent dentition with at least one impacted third molar.
  • Adequate bone marrow function, defined as white blood cell count ≥4.0 × 10⁹/L, platelet count ≥100 × 10⁹/L, and hemoglobin ≥90 g/L.
  • Adequate hepatic function, defined as alanine aminotransferase and aspartate aminotransferase ≤2.5 × the upper limit of normal (ULN), and total bilirubin ≤1.5 × ULN.
  • Adequate renal function, defined as blood urea nitrogen and serum creatinine ≤1.5 × ULN, or creatinine clearance ≥60 mL/min.
  • Coagulation function within normal limits.
  • Written informed consent provided, with willingness and ability to comply with study visits, treatment plans, laboratory assessments, and other study procedures.

Exclusion Criteria:

  • Histopathological diagnosis other than WHO type II or III nasopharyngeal carcinoma.
  • Impacted third molars with recurrent pericoronitis or inflammation due to incomplete eruption.
  • Fully erupted third molars with dental caries involving the pulp.
  • Impacted third molars with radiographic evidence of periapical or periodontal inflammation.
  • Third molars completely impacted within the jawbone.
  • History of active malignancy or other malignant tumors diagnosed within the previous 5 years, except for adequately treated non-melanoma skin cancer or carcinoma in situ.
  • Previous chemotherapy, surgery (except diagnostic procedures), radiotherapy, or other antitumor treatment for nasopharyngeal carcinoma or cervical lesions.
  • Patients receiving palliative treatment.
  • Pregnant or breastfeeding women.
  • Severe uncontrolled cardiovascular or cerebrovascular diseases.
  • Severe hepatic or renal dysfunction.
  • Uncontrolled diabetes mellitus.
  • Severe osteoporosis, medication-related osteonecrosis/osteomyelitis, or chronic diseases requiring long-term systemic corticosteroid therapy.
  • Other severe chronic debilitating diseases that may increase study risk or affect study compliance.
  • History of drug abuse or alcohol dependence.
  • Uncontrolled psychiatric disorders or inability to provide legally valid informed consent.
  • Positive hepatitis B surface antigen (HBsAg) with hepatitis B virus DNA >1,000 copies/mL.
  • Active hepatitis C virus infection (positive HCV RNA).
  • Human immunodeficiency virus (HIV) infection or diagnosis of acquired immunodeficiency syndrome (AIDS).
  • Active tuberculosis within the previous 1 year.
  • History of active tuberculosis more than 1 year previously without documented completion of standard anti-tuberculosis treatment.
  • Any other medical, psychological, social, or laboratory condition that, in the investigator's judgment, may compromise participant safety, interfere with study procedures, affect protocol compliance, or result in premature withdrawal from the study.
  • Refusal or inability to provide written informed consent.

Учебный план

В этом разделе представлена ​​подробная информация о плане исследования, в том числе о том, как планируется исследование и что оно измеряет.

Как устроено исследование?

Детали дизайна

  • Основная цель: Профилактика
  • Распределение: Рандомизированный
  • Интервенционная модель: Параллельное назначение
  • Маскировка: Нет (открытая этикетка)

Оружие и интервенции

Группа участников / Армия
Вмешательство/лечение
Экспериментальный: Omission of Prophylactic Extraction Group
Participants assigned to this group will not undergo prophylactic extraction of impacted teeth before radiotherapy.
Другой: Omission of Prophylactic Impacted Tooth Extraction
Participants will not undergo prophylactic extraction of eligible impacted teeth before radiotherapy.
Активный компаратор: Conventional Prophylactic Extraction Group
Participants assigned to this group will undergo conventional prophylactic extraction of impacted teeth before radiotherapy.
Процедура: Prophylactic Impacted Tooth Extraction
Participants will undergo prophylactic extraction of eligible impacted teeth before radiotherapy according to the study protocol.

Что измеряет исследование?

Первичные показатели результатов

Мера результата
Мера Описание
Временное ограничение
2-Year Cumulative Incidence of Jaw Osteoradionecrosis
Временное ограничение: Within 24 months after completion of radiotherapy
The cumulative incidence of jaw osteoradionecrosis (JORN) within 24 months after completion of radiotherapy will be estimated and compared between the two treatment groups.
Within 24 months after completion of radiotherapy

Вторичные показатели результатов

Мера результата
Мера Описание
Временное ограничение
2-Year Overall Survival
Временное ограничение: 24 months after randomization
The 2-year overall survival rate will be estimated as the probability of remaining alive at 24 months after randomization and compared between the two treatment groups.
24 months after randomization
2-Year Event-Free Survival
Временное ограничение: 24 months after randomization
The 2-year event-free survival rate will be estimated as the probability of remaining free from local recurrence, regional recurrence, distant metastasis, or death from any cause at 24 months after randomization and compared between the two treatment groups.
24 months after randomization
2-Year Local Relapse-Free Survival
Временное ограничение: 24 months after randomization
The 2-year local relapse-free survival rate will be estimated as the probability of remaining free from local recurrence or death at 24 months after randomization and compared between the two treatment groups.
24 months after randomization
2-Year Regional Relapse-Free Survival
Временное ограничение: 24 months after randomization
The 2-year regional relapse-free survival rate will be estimated as the probability of remaining free from regional recurrence or death at 24 months after randomization and compared between the two treatment groups.
24 months after randomization
2-Year Distant Metastasis-Free Survival
Временное ограничение: 24 months after randomization
The 2-year distant metastasis-free survival rate will be estimated as the probability of remaining free from distant metastasis or death from any cause at 24 months after randomization and compared between the two treatment groups.
24 months after randomization
Quality of Life Assessed by the EORTC QLQ-C30
Временное ограничение: Baseline and 3, 6, 12, and 24 months after completion of radiotherapy
Quality of life will be assessed using the European Organisation for Research and Treatment of Cancer Quality of Life Questionnaire-Core 30 (EORTC QLQ-C30). Scores are transformed to a 0-100 scale. Higher scores on the functional scales and global health status/quality-of-life scale indicate better functioning or quality of life, whereas higher scores on the symptom scales indicate greater symptom burden.
Baseline and 3, 6, 12, and 24 months after completion of radiotherapy
Head and Neck Cancer-Specific Quality of Life Assessed by the EORTC QLQ-H&N35
Временное ограничение: Baseline and 3, 6, 12, and 24 months after completion of radiotherapy
Head and neck cancer-specific symptoms and quality-of-life problems will be assessed using the EORTC QLQ-H&N35 questionnaire. Scores are transformed to a 0-100 scale, with higher scores indicating greater symptom burden or more severe problems.
Baseline and 3, 6, 12, and 24 months after completion of radiotherapy
Acute Treatment-Related Toxicities
Временное ограничение: From initiation of treatment through 90 days after completion of radiotherapy
The incidence and severity of acute treatment-related toxicities will be assessed and compared between the two treatment groups. Toxicities will be graded according to the Common Terminology Criteria for Adverse Events (CTCAE), version 5.0, as applicable.
From initiation of treatment through 90 days after completion of radiotherapy
5-Year Cumulative Incidence of Jaw Osteoradionecrosis
Временное ограничение: Within 60 months after completion of radiotherapy
The cumulative incidence of jaw osteoradionecrosis (JORN) within 60 months after completion of radiotherapy will be estimated and compared between the two treatment groups.
Within 60 months after completion of radiotherapy
5-Year Overall Survival
Временное ограничение: 60 months after randomization
The 5-year overall survival rate will be estimated as the probability of remaining alive at 60 months after randomization and compared between the two treatment groups.
60 months after randomization
5-Year Event-Free Survival
Временное ограничение: 60 months after randomization
The 5-year event-free survival rate will be estimated as the probability of remaining free from local recurrence, regional recurrence, distant metastasis, or death from any cause at 60 months after randomization and compared between the two treatment groups.
60 months after randomization
5-Year Local Relapse-Free Survival
Временное ограничение: 60 months after randomization
The 5-year local relapse-free survival rate will be estimated as the probability of remaining free from local recurrence or death from any cause at 60 months after randomization and compared between the two treatment groups.
60 months after randomization
5-Year Regional Relapse-Free Survival
Временное ограничение: 60 months after randomization
The 5-year regional relapse-free survival rate will be estimated as the probability of remaining free from regional recurrence or death from any cause at 60 months after randomization and compared between the two treatment groups.
60 months after randomization
5-Year Distant Metastasis-Free Survival
Временное ограничение: 60 months after randomization
The 5-year distant metastasis-free survival rate will be estimated as the probability of remaining free from distant metastasis or death from any cause at 60 months after randomization and compared between the two treatment groups.
60 months after randomization
Late Treatment-Related Toxicities
Временное ограничение: From more than 90 days through 60 months after completion of radiotherapy
The incidence and severity of late treatment-related toxicities will be assessed and compared between the two treatment groups using the RTOG/EORTC late radiation morbidity scoring criteria and CTCAE version 5.0, as applicable.
From more than 90 days through 60 months after completion of radiotherapy

Соавторы и исследователи

Здесь вы найдете людей и организации, участвующие в этом исследовании.

Спонсор

First Affiliated Hospital of Guangxi Medical University

Соавторы

Wuzhou Red Cross Hospital
LiuZhou People's Hospital
First People's Hospital of Yulin
Guigang People's Hospital
Affiliated Hospital of Guilin University
People's Hospital of Guangxi Zhuang Autonomous Region
Youjiang Medical College for Nationalities
Liuzhou Workers' Hospital

Следователи

  • Главный следователь: Min Kang, MD, First Affiliated Hospital of Guangxi Medical University

Публикации и полезные ссылки

Лицо, ответственное за внесение сведений об исследовании, добровольно предоставляет эти публикации. Это может быть что угодно, связанное с исследованием.

Общие публикации

Даты записи исследования

Эти даты отслеживают ход отправки отчетов об исследованиях и сводных результатов на сайт ClinicalTrials.gov. Записи исследований и сообщаемые результаты проверяются Национальной медицинской библиотекой (NLM), чтобы убедиться, что они соответствуют определенным стандартам контроля качества, прежде чем публиковать их на общедоступном веб-сайте.

Изучение основных дат

Начало исследования (Оцененный)

30 августа 2026 г.

Первичное завершение (Оцененный)

30 ноября 2029 г.

Завершение исследования (Оцененный)

30 ноября 2032 г.

Даты регистрации исследования

Первый отправленный

26 марта 2026 г.

Впервые представлено, что соответствует критериям контроля качества

10 августа 2026 г.

Первый опубликованный (Действительный)

14 августа 2026 г.

Обновления учебных записей

Последнее опубликованное обновление (Действительный)

14 августа 2026 г.

Последнее отправленное обновление, отвечающее критериям контроля качества

10 августа 2026 г.

Последняя проверка

1 августа 2026 г.

Дополнительная информация

Термины, связанные с этим исследованием

Ключевые слова

Дополнительные соответствующие термины MeSH

Другие идентификационные номера исследования

  • FirstGuangxiMU02

Планирование данных отдельных участников (IPD)

Планируете делиться данными об отдельных участниках (IPD)?

НЕТ

Описание плана IPD

Individual participant data (IPD) will not be shared because the study data are subject to institutional, ethical, and participant confidentiality requirements.

Информация о лекарствах и устройствах, исследовательские документы

Изучает лекарственный продукт, регулируемый FDA США.

Нет

Изучает продукт устройства, регулируемый Управлением по санитарному надзору за качеством пищевых продуктов и медикаментов США.

Нет

Эта информация была получена непосредственно с веб-сайта clinicaltrials.gov без каких-либо изменений. Если у вас есть запросы на изменение, удаление или обновление сведений об исследовании, обращайтесь по адресу register@clinicaltrials.gov. Как только изменение будет реализовано на clinicaltrials.gov, оно будет автоматически обновлено и на нашем веб-сайте. .

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