A 29 year old male patient complains of protruding upper incisors. The incisor relationship can be classified as Class II div 1. This system of classification for incisor relationship was described by:
**Core Concept**
The classification of incisor relationship is a fundamental concept in orthodontics, used to describe the alignment and position of the upper and lower incisors in the dental arch. The classification system is crucial in determining the treatment plan for patients with malocclusion.
**Why the Correct Answer is Right**
The classification system for incisor relationship was described by Edward H. Angle, an American orthodontist, in the late 19th century. Angle's classification system is based on the relationship between the upper and lower incisors, which are classified into three main categories: Class I, Class II, and Class III. Class II div 1 is a specific type of Class II malocclusion where the upper incisors are protruded and the lower incisors are retroclined. This classification system helps orthodontists to identify the underlying cause of the malocclusion and plan an appropriate treatment.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as there is no record of a prominent orthodontist by this name describing the incisor relationship classification system.
**Option B:** This option is incorrect as the classification system for incisor relationship was not described by this individual.
**Option C:** This option is incorrect as the correct answer is a well-documented figure in the field of orthodontics.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that Angle's classification system is not only used in orthodontics but also in other dental specialties, such as pediatric dentistry and oral surgery.
**Correct Answer: D. Edward H. Angle**