相关实验视频
Updated: May 6, 2026

10:26
Inducing Apical Periodontitis in Mice
Published on: August 6, 2019
12.3K
顶孔直径对周围病变体积和球状性的影响:形光束计算断层扫描研究
Ariane Moreira Fernandez Souza1, Guilherme Nilson Alves Dos Santos1, Helena Cristina Assis1
1Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Av. do Café, s/n., Ribeirão Preto, São Paulo, 14020-904, Brazil.
Oral radiology
|August 28, 2025
概括
较小的尖端通道直径与较小的周围病变和更高的球形相对应. 解剖学区域影响这些关系,影响内牙治疗计划.
科学领域:
- 牙周内科
- 口腔放射学
- 牙科的解剖学
背景情况:
- 在未经治疗的牙中常见的周病变.
- 评估它们的特征对于诊断和治疗计划至关重要.
- 圆束计算机断层扫描 (CBCT) 可以提供详细的3D成像.
研究的目的:
- 将周围病变的尺寸 (直径,体积,表面积,球形) 与顶部通道直径相关联.
- 通过使用CBCT基础的指数 (CBCTPAI和CBCTPAVI) 对解剖区域进行病变分类的比较.
- 研究解剖位置对这些关系的影响.
主要方法:
- 分析500个未经处理的牙的CBCT扫描.
- 从顶部测量顶部通道直径的1mm.
- 半自动细分用于损伤体积和表面积的计算;球性计算.
- 使用CBCT周周量指数 (CBCTPAI) 和CBCT周周量指数 (CBCTPAVI) 进行分类.
主要成果:
- 较小的顶端直径与较小的病变直径和更高的球形度相关,特别是在下前牙.
- 在上和下后部地区的CBCTPAI得分为4; CBCTPAVI得分为6占主导地位.
- 导致皮层扩张的病变具有显著更大的尖端直径;解剖区域影响了相关性.
结论:
- 周周病变形态和大小因解剖区域和顶端通道直径而异.
- 基于CBCT的体积和形态评估有助于个性化诊断和治疗规划.
- 需要对病变体积和球状度测量的临床适用性进行进一步研究.
相关概念视频
Computed Tomography
7.6K
Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
7.6K
Aneurysm II: Clinical Manifestations and Diagnostic Studies
593
Thoracic, aortic arch and abdominal aneurysms are significant vascular conditions that can present with various clinical manifestations and lead to serious complications. Understanding these manifestations and the appropriate diagnostic studies is essential for effective management and treatment.Thoracic Aortic AneurysmsThoracic aortic aneurysms often remain asymptomatic until they reach a size that impinges on adjacent structures. They typically cause deep, diffuse chest pain that radiates to...
593
Imaging Studies III: Computed Tomography
906
DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
906

