n Orthopantomogram — we just call it an OPG — is a panoramic X-ray that captures both your upper and lower jaws in one single, wide image. Think of it as a complete snapshot of your entire mouth.Why do we use it?The OPG is like a screening tool. It gives us a broad view of everything happening in your mouth, often revealing issues you didn't even know were there.Oral screening: We can spot cavities, infections, cysts, bone loss, and other problems across all your teeth at once.Impacted teeth: It shows us teeth that are stuck under the gums — especially wisdom teeth or teeth that haven't erupted properly. This is crucial before starting orthodontic treatment.Bone levels: For gum disease treatment or surgery, we can assess how much bone surrounds each tooth and plan accordingly.General diagnosis: It's a quick way to get an overall picture before diving into more detailed imaging if needed.What are its limitations?Because the OPG is a 2D image, it has some shortcomings:
Magnification: Objects can appear larger than they actually are
Superimposition: Structures overlap, so some details get hidden
Distortion: Measurements aren't 100% accurate
That's why we don't rely on it for precise measurements. If we need exact dimensions — like for implant planning — we'll use a CBCT scan instead.How is it taken?You'll stand or sit in the machine with your chin resting on a small platform. The X-ray arm rotates around your head, taking about 15–20 seconds to capture the full image. It's completely painless.