The terms 'neutrocclusion', 'distocclusion', and 'mesiocclusion' were first introduced by Lischer to classify malocclusions based on the antero-posterior relationship of the dental arches. This classification is essential in orthodontics for diagnosing and planning treatment by clearly defining the occlusal relationships. Unlike Angle, who later refined malocclusion classifications, Lischer's terms laid the foundational nomenclature. Understanding these terms is critical for recognizing normal occlusion (neutrocclusion) and deviations where the lower jaw is positioned posteriorly (distocclusion) or anteriorly (mesiocclusion) relative to the upper jaw, impacting occlusal function and esthetics.

Reference: Wheeler's Dental Anatomy, Physiology and Occlusion, 10th Edition.