What is OPG?
An OPG is a panoramic or wide view x-ray of the lower face, which displays all the teeth of the upperand lower jaw on a single film. It demonstrates the number, position and growth of all the teeth including those that have not yet surfaced or erupted. It is different from the small close up x-raysdentists take of individual teeth. An OPG may also reveal problems with the jawbone and the joint which connects the jawbone to the head, called the Temporomandibular joint or TMJ. An OPG may be requested for the planning of orthodontic treatment, for assessment of wisdom teeth or for a general overview of the teeth and the bone which supports the teeth.
You may be asked to remove jewellery, eyeglasses, and any metal objects that may obscure the images. You will be asked to stand with your face resting on a small shelf and to bite gently on a sterile mouth piece to steady your head. It is important to stay very still while the x-ray is taken. You will not feel any discomfort during the procedure.
A Lat Ceph is a lateral or side view x-ray of the face, which demonstrates the bones and facial contours in profile on a single film. Lat Ceph x-rays are usually used in the diagnosis and treatment of orthodontic problems.
You may be asked to remove jewellery, eyeglasses, and any metal objects that may obscure the images. You will be asked to stand with your head against the machine so that it can be adjusted for your comfort. A pair of cone shaped plastic supports are then gently positioned in each ear, rather like a pair of headphones. This aligns both ears to ensure that an exact side view of the face is
obtained. You will not feel any discomfort during the procedure.
How safe is an MRI?
- No ionizing radiation
- No known biological hazards
- High-resolution-isotropic images (3D images)
- Excellent soft tissue contrast – Opportunity to interpret pathological changes
- MRI is usually non-invasive- imaging of blood vessel without contrast injection
- Dynamic imaging of joints and the heart
How safe is an MRI?
Some patients may not be able to have an MRI scan. They include people who get nervous in small spaces (claustrophobic) and those with implanted medical devices such as aneursm clips in the brain, heart pacemakers and cochlear (inner ear) implants. Also, people with pieces of metal close to or in a vital organ (e.g. the eye) may not be scanned. There are a few additional safety considerations and some exceptions based on individual circumstances.