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课程主页: https://www.udemy.com/course/master-how-to-classify-malocclusion-use-iotn-index/
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课程名称：错颌畸形的分类及临床应用IOTN指数 课程概述： 本课程旨在介绍咬合关系的基本概念，以及其对颌面形态和口腔健康的重要性。课程将重点讲解牙齿错颌畸形的分类方法，特别是爱德华·哈特利·安格尔（Edward Hartley Angle）的分类系统，并介绍错颌畸形牙齿矫正需求指数（IOTN）在临床实践中的应用。 课程内容： * **咬合关系的重要性**：讲解咬合的概念及其对个体颜面美观和口腔健康的影响。 * **牙齿错颌畸形的分类**： * **I 类错颌畸形**：上颌牙齿轻微前突，但咬合关系整体正常。包括： * I 类：牙齿向舌侧倾斜。 * II 类：牙弓狭窄，上前牙前突，下前牙舌侧倾斜。 * III 类：上前牙向舌侧倾斜，伴有牙齿拥挤。 * **II 类错颌畸形**：上前牙明显超越下前牙，形成深覆盖（overbite）。通常需要正畸治疗。细分为： * 第1分型：上前牙向前唇侧倾斜。 * 第2分型：上前牙中切牙向舌侧倾斜。 * **III 类错颌畸形**：下颌牙齿咬合在上前牙前方，形成严重的锁颌（underbite），也可能包含反颌（crossbite）。进一步细分为： * I 类：牙齿排列基本良好，但牙弓形态异常。 * II 类：上前牙排列正常，但下前牙舌侧倾斜。 * III 类：上颌骨发育不足，下颌牙齿排列正常，但上前牙舌侧倾斜。 * **错颌畸形的临床诊断**：强调在开始正畸治疗前，对错颌畸形的准确分类是指导治疗方案、确定病因（包括不良习惯）的关键。 * **IOTN 指数的应用**：介绍如何使用错颌畸形牙齿矫正需求指数（IOTN）来评估错颌畸形的严重程度，为临床治疗决策提供依据。
Occlusion is defined as the contact relationship of the maxillary and mandibular teeth when the mouth is fully closed. Occlusion is important because it can influence a person's facial profile and also the health of the oral cavity. Occlusions that are not ideal may be improved with dental treatments such as orthodontics. In this course, we are going to examine some of the most fundamental concepts that dental professionals need to know when classifying occlusion. Also we discuss basic terminology and use of orthodontic treatment need index used to grade severity of malocclusion. WHAT IS CLASS I MALOCCLUSION?A Class I malocclusion is when the upper teeth stick out over the lower teeth, commonly called an overlap, but the bite is otherwise normal. There are many reasons why the upper teeth may overlap, including prolonged thumb-sucking or bottle use in childhood. An overlap may require minor correction with orthodontic appliances. There are three types of Class I malocclusion according to Edward Hartley Angle's classification:Type I: The teeth angle toward the tongue.Type II: Includes narrow arches with the upper teeth sticking out and lower teeth leaning in toward the tongue.Type III: The upper front teeth angle toward the tongue and crowding is present.WHAT IS CLASS II MALOCCLUSION?A Class II malocclusion is when the upper teeth stick out over the lower teeth and affect the overall bite alignment, also known as an overbite. This type of malocclusion is often severe enough that orthodontic intervention is recommended. While it may take a little more time to shape the bite to a more natural state, it is still possible to do so with the right appliances and approach to treatment. There are two divisions of Class II malocclusions that each includes a subdivision where the condition applies to the entire mouth:Division 1: The upper teeth are angled toward the lips.Division 2: The upper central incisors are angled toward the tongue.WHAT IS CLASS III MALOCCLUSION?A Class III malocclusion occurs when the lower teeth stick out farther than the upper teeth, resulting in a severe underbite, but it can also include a crossbite, which may have a series of overlapping upper and lower teeth. Angle further classifies this malocclusion into three types:Type I: The alignment of the teeth is good in general, but there is an abnormal shape to the arch.Type II: The upper front teeth alignment is fine, but the lower front teeth lean toward the tongue.Type III: The upper arch is underdeveloped. The lower teeth have good alignment, but the upper front teeth lean toward the tongue.Classification of the MalocclusionBefore beginning orthodontic treatment, we need to classify malocclusion. Proper identification will guide the course of treatment to bring the teeth and jaw into proper alignment. It can also help to identify possible causes of the malocclusion, especially if those causes include habits that need to be addressed first.
