Biography of Cecil C. Steiner: - Born in Rancho Cucamonga, California in 1896. - Moved to California in 1904 and settled in the Imperial Valley. - Attended a small country school with only 12 students. - Graduated from Brawley High School and attended the University of California, Berkeley for his undergraduate education. - Obtained his dental degree from the UCSF School of Dentistry at the age of 19.

Career of Cecil C. Steiner: - Known for his articles on cephalometrics. - Worked at the Angle School of Orthodontia and perfected the edgewise bracket. - Part-time faculty at the Orthodontic Department in UCSF School of Dentistry. - Played a significant role in starting the USC Orthodontic Department. - USC Department dedicated their library to Dr. Steiner in recognition of his contributions.

Steiner's Analysis: - Consists of Skeletal, Dental, and Soft Tissue Analysis. - Skeletal component relates the upper and lower jaws to the skull and each other. - Dental component relates the position of the upper and lower incisors to each other and their respective jaws. - Soft tissue component focuses on understanding the lower facial profile. - Developed various measurements and angles to assess these components.

Skeletal Analysis: - SNA angle determines the position of the maxilla relative to the cranial base. - SNB angle determines the position of the mandible relative to the cranial base. - ANB angle determines the relationship between the maxilla and mandible. - Occlusal Plane to SN is a plane drawn through cusps of first molars and premolars. - Mandibular Plane is drawn using Gonion and Gnathion to determine the growth pattern.

Dental Analysis: - Maxillary Incisor Position relates the upper incisors to the N-A line. - Mandibular Incisor Position relates the lower incisors to the N-B line. - Interincisal Angle describes the position of the upper incisor relative to the lower incisor. - Lower Incisor to Chin measures the distance from the distal surface of the lower incisor to the N-B line. - Various averages and measurements are used to assess dental relationships.