Scholarlink

Objectives <p>This study aims to describe the cone-beam computed tomography (CBCT) characteristics of external root resorption (ERR) in second molars associated with impacted third molars.</p> Methods <p>This study analyzed 69&#xa0;s molars diagnosed with ERR caused by impacted third molars in 52 patients (age range: 22–59&#xa0;years; mean age = 31.2 ± 7.1&#xa0;years) to identify key factors influencing the severity and occurrence of ERR. CBCT was used to assess the relationship between impacted third molar characteristics (position, angulation, proximity) and the extent of root resorption in adjacent second molars.</p> Results <p>ERR most commonly affected mandibular second molars (37 teeth: 60.0%, 47 teeth: 40.6%). Resorption extended to the pulp chamber in 47.9% of cases, while 40.6% was limited to superficial/middle dentin. 24.6% of the ERR sites were in communication with the oral cavity. 87% of impacted third molars were low-level, and 38% were completely bone-impacted. 26% had an angulation &gt; 90° relative to the affected tooth. Complete bone impaction significantly correlated with ERR extending to the pulp chamber (65%, p &lt; 0.05). ERR communicating with the oral cavity significantly increased pain on percussion. Younger patients were more likely to have ERR extending to the pulp chamber.</p> Conclusions <p>Low-level and complete bone impactions of impacted third molars significantly contribute to the development of ERR in adjacent second molars. Communication between the ERR site and the oral cavity is associated with a high risk of infection.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

External root resorption of second molars caused by impacted third molars: CBCT characteristics

  • 期刊论文

  • 发表日期：

    2025年9月10日

查看全文
  • Kan Wang,
  • Jiajia Zheng,
  • Jinghua He,
  • Yuan Fu,
  • Xiaoming Lyu

摘要

Objectives

This study aims to describe the cone-beam computed tomography (CBCT) characteristics of external root resorption (ERR) in second molars associated with impacted third molars.

Methods

This study analyzed 69 s molars diagnosed with ERR caused by impacted third molars in 52 patients (age range: 22–59 years; mean age = 31.2 ± 7.1 years) to identify key factors influencing the severity and occurrence of ERR. CBCT was used to assess the relationship between impacted third molar characteristics (position, angulation, proximity) and the extent of root resorption in adjacent second molars.

Results

ERR most commonly affected mandibular second molars (37 teeth: 60.0%, 47 teeth: 40.6%). Resorption extended to the pulp chamber in 47.9% of cases, while 40.6% was limited to superficial/middle dentin. 24.6% of the ERR sites were in communication with the oral cavity. 87% of impacted third molars were low-level, and 38% were completely bone-impacted. 26% had an angulation > 90° relative to the affected tooth. Complete bone impaction significantly correlated with ERR extending to the pulp chamber (65%, p < 0.05). ERR communicating with the oral cavity significantly increased pain on percussion. Younger patients were more likely to have ERR extending to the pulp chamber.

Conclusions

Low-level and complete bone impactions of impacted third molars significantly contribute to the development of ERR in adjacent second molars. Communication between the ERR site and the oral cavity is associated with a high risk of infection.