No orthodontist can deny that cast analysis is so important key in diagnosis and treatment planning in conjunction with the rest of routine orthodontic records. Cast analysis for permanent teeth is one of the influential aids to obtain the exact amount of space required to relieve the crowding properly via adequate space gaining methods such as extraction, IPR (Interproximal Reduction), expansion, or distalization. Therefore, the measurement errors during tooth size arch length analysis are a crucial issue because any decrease or increase in millimeters for space required may cause significant alterations in treatment plan strategy because of the inaccuracy of measurement’s magnitude. So, answering the following question is so interesting. The question is “ignoring the measurement errors during cast analysis measurement can affect the measurement’s outcomes significantly or not. Despite, studying and understanding the measurement errors that could happen duringcast analysis procedureis so equal to cast analysis study especially for orthodontists

Transparent Plastic Arch Form Ruler, Reflex Metro-graph, F-curve Ruler