What is the primary basis for diagnosing orthodontic cases?

The primary basis for diagnosing orthodontic cases is the relation of dentition and the jaw to the cranium. This relationship is crucial as it dictates how the teeth and jaws align and function together. Analyzing the occlusion—the way upper and lower teeth meet—along with the skeletal structure provides insights into abnormalities and will guide treatment decisions.

Understanding this relation helps orthodontists assess malocclusions, determine the need for intervention, and establish a treatment plan that considers both aesthetics and functionality. Such assessments typically involve radiographs, cephalometric analysis, and clinical evaluations, all focused on achieving optimal dental alignment relative to the craniofacial complex.

Although cranium size, profile recordings, and overbite size are relevant to orthodontic assessments, they are secondary aspects that contribute to a comprehensive understanding of dental and skeletal relationships. Being centered on the relationship of dentition and jaws to the cranium ensures a more holistic and effective approach to diagnosis and planning in orthodontics.