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.