CBCT 和全景片影像中横向平面无牙颌牙槽嵴轮廓和颊舌向垂直水平差异的评估：一项回顾性对比研究。

Evaluation of the contour of edentulous jaw sections in the transversal plane and the buccolingual vertical-level disparity in CBCT and panoramic radiography images: a retrospective comparative study.

机构信息

Department of Prosthodontics, School of Dentistry, Faculty of Health, Witten/Herdecke University, Alfred-Herrhausen-Straße 45, 58455, Witten, Germany.

Private Dental Office, Epplestraße 29 a, 70597, Stuttgart, Germany.

出版信息

Int J Implant Dent. 2023 Jan 3;9(1):1. doi: 10.1186/s40729-022-00466-8.

DOI:10.1186/s40729-022-00466-8

PMID:36595148

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9810779/

Abstract

PURPOSE

This study investigates whether edentulous jaw sections in the planned implant position exhibit jaw contours funnel-shaped or exhibit pronounced retraction of the jaw (unusual jaw contours) in the transversal plane of the three-dimensional (3D) images, not visible in two-dimensional (2D) images.

METHODS

A total of 335 patients with an edentulous section of the jaw that required dental implants were selected. Anonymised radiologic patients' data were collected, comprising cone-beam computed tomography (CBCT) images of the edentulous jaw sections. In the first stage, unusual jaw contours were examined, including funnel-shaped or pronounced retraction of the jaw and hypodense regions with an undercut and/or bone deficit. In the second stage, the variation in the height of the alveolar ridge between the lingual and buccal contour in the edentulous jaw sections was assessed.

RESULTS

The CBCT images of an unusual jaw contour were observed in 8 cases (2.4%) in the maxilla on the left and 10 cases (3%) in the maxilla on the right. In the mandible, a jaw contour deviates in 39 cases (12.1%) on the left side and 39 cases (12.1%) on the right side. A height difference was detected in the upper jaw in 307 cases and the lower jaw in 265 cases. The discrepancy was 2.09 mm (± 2.25 mm) in the maxilla and 3.97 mm (± 3.45 mm) in the mandible.

CONCLUSIONS

The CBCT scan provides useful information to avoid complications in the preoperative planning phase and surgical planning in implant dentistry.

摘要

目的

本研究旨在探讨在三维（3D）图像的横断面上，计划种植部位的无牙颌节段是否表现出漏斗形颌轮廓，或表现出明显的颌回缩（异常颌轮廓），而在二维（2D）图像中则无法观察到这些特征。

方法

共选择了 335 名颌骨无牙节段需要种植牙的患者。收集了匿名放射学患者数据，包括颌骨无牙节段的锥形束计算机断层扫描（CBCT）图像。在第一阶段，检查了异常颌轮廓，包括漏斗形或明显的颌回缩以及有切迹和/或骨缺损的低密区域。在第二阶段，评估了颌骨无牙节段颊舌轮廓之间牙槽嵴高度的变化。

结果

在左侧上颌骨中有 8 例（2.4%）和右侧上颌骨中有 10 例（3%）观察到 CBCT 图像存在异常颌轮廓。在下颌骨中，左侧有 39 例（12.1%）和右侧有 39 例（12.1%）的颌轮廓偏离。上颌骨中有 307 例和下颌骨中有 265 例检测到高度差异。上颌骨的差异为 2.09 毫米（±2.25 毫米），下颌骨的差异为 3.97 毫米（±3.45 毫米）。