Apical periodontitis with external cervical resorption of left upper first permanent molar：A case report

doi:10.3877/cma.j.issn.1674-1366.2025.03.007

Abstract

Abstract:

Cervical external resorption occurs at the enamelo-cemental junction of teeth caused by various factors such as occlusal trauma，hypoxia，plaque and orthodontic forces. In the early stage，it is difficult to detect through clinical examination. It can be observed through imaging examinations such as cone beam computed tomography. This article reported a case of periapical periodontitis of the upper left first molar with cervical resorption of the distal buccal root. After timely root canal treatment，reparative imaging of both the periapical lesion and cervical resorption site was observed.

Key words: Apical periodontitis, Pulpitis, External cervical resorption, Orthodontic power

Kunzhou Mei, Tongzheng Sun, Yanfei Sun, Yameng Zhang, Yanwen Cui, Fang Yang. Apical periodontitis with external cervical resorption of left upper first permanent molar：A case report[J]. Chinese Journal of Stomatological Research(Electronic Edition), 2025, 19(03): 198-203.

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References 29

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发生部位	环绕角度	与牙髓组织位置关系
1：位于釉牙骨质界以上（龈上）	A：≤90°	d：局限于牙本质
2：位于釉牙骨质界以下（龈下/根颈1/3）	B：＞90°至≤180°
3：根中1/3	C：＞180°至≤270°	p：接近或波及牙髓组织
4：根尖1/3	D：＞270°

发生部位	环绕角度	与牙髓组织位置关系
1：位于釉牙骨质界以上（龈上）	A：≤90°	d：局限于牙本质
2：位于釉牙骨质界以下（龈下/根颈1/3）	B：＞90°至≤180°
3：根中1/3	C：＞180°至≤270°	p：接近或波及牙髓组织
4：根尖1/3	D：＞270°

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