It is very important that prior to tracing the radiograph, it is examined for any pathology. Once taken, the LCR should be traced either by hand or digitally and analysed to help with treatment planning and diagnosis. These radiographs can also be used for research purposes, although the radiographs must be clinically justified. It is used to assess the aetiology of malocclusion to determine whether the malocclusion is due to skeletal relationship, dental relationship or both. It is a useful record prior to treatment and can be used during treatment to assess progress. The LCR is used primarily in orthodontic d iagnosis and treatment planning, particularly when considering orthognathic surgery. The cephalostat machine incorporates two posts which are placed in the external auditory meatus, the patient’s sagittal plane should be parallel to the X-ray film, the teeth in centric occlusion and the Frankfort plane is aligned horizontally. A degree of magnification (around 8%) is expected and a scale may be incorporated to help calculate this. It is taken from a distance of 1.5m with the head at a right angle to the X-ray beam at a distance of 30cm, (although this has been found to vary slightly).

This article discusses the uses, indications and basic anatomical features present on a Lateral Cephalometric Radiograph, as well as discussing the basic definitions of points and planes used in cephalometric analysis.Ī lateral cephalometric radiograph (LCR) is a standardised, reproducible radiograph used primarily for orthodontic diagnosis and treatment planning. Lydia Harris graduated from Bristol dental school in 2012 and is currently working as a Maxillofacial SHO in Bath.

Lateral ceph landmarks