If your dentist has recommended an OPG (orthopantomogram) or a “full mouth X-ray” (দাঁতের এক্স-রে), you might wonder what it involves and why it’s needed. An OPG is a panoramic X-ray that captures your entire mouth—all teeth, both jaws, the temporomandibular joints (TMJ), and surrounding sinuses—in a single sweeping image. It is a routine, painless screening tool that helps dentists see problems that are not visible during a regular oral exam. This guide explains what an OPG shows, how it compares to other dental X-rays, what to expect during the scan, and what it costs in Bangladesh.
What is an OPG and What Does It Show?
An OPG is a two-dimensional panoramic radiograph. Unlike a small intraoral X-ray that focuses on one or two teeth, the OPG machine rotates around your head to create a wide, flattened view of your upper and lower jaws. This single image lets your dentist assess:
- Impacted or unerupted teeth (especially wisdom teeth)
- Jaw fractures or other trauma
- Cysts, tumors, or other bony lesions
- Temporomandibular joint (TMJ) abnormalities
- Maxillary sinus issues
- Bone level and quality before dental implants
- Overall alignment of teeth and jaws for orthodontic planning
It is important to understand that an OPG is a screening tool, not a high-resolution diagnostic for every dental problem. Fine details like early tooth decay, root fractures, or subtle periodontal bone loss are often better seen on intraoral X-rays. Your dentist will decide if additional images are needed based on your symptoms and clinical findings.
OPG vs. Full Mouth X-Ray: What’s the Difference?
Many people use the terms “OPG” and “full mouth X-ray” interchangeably, but they are not the same. A full mouth series (also called a full mouth X-ray or IOPA – intraoral periapical radiographs) consists of 14–18 small images taken inside your mouth, each showing a few teeth in high detail. An OPG is a single extraoral image taken outside the mouth that shows the entire dental arch in one panoramic view. The table below summarizes the key differences.
| Feature | OPG (Panoramic) | Full Mouth Series (IOPA) | CBCT (3D) |
|---|---|---|---|
| Image type | Single 2D panoramic view | Multiple 2D periapical images | 3D cone-beam CT |
| Coverage | All teeth, both jaws, TMJs, sinuses | Individual teeth and roots | 3D volume of a specific area |
| Detail resolution | Moderate – good for overview | High – excellent for root and caries detail | Very high – allows cross-sectional views |
| Radiation dose | Low (5–30 µSv) | Low (similar or slightly lower per image, but multiple images add up) | Higher than OPG but lower than medical CT |
| Typical use | Screening, wisdom teeth, implants, trauma | Detailed diagnosis of decay, root infections, periodontal disease | Implant planning, complex surgical assessment |
In practice, your dentist may start with an OPG for a broad view and then take a few intraoral X-rays for specific areas that need closer inspection.
When is an OPG Recommended?
An OPG is not needed for every routine check-up. Your dentist will usually recommend it when there is a clinical reason to see a larger area. Common situations include:
- Wisdom tooth evaluation: To check the position and angle of impacted third molars and their relation to the inferior alveolar nerve.
- Jaw pain or trauma: To look for fractures, dislocations, or other bony abnormalities.
- Dental implant planning: To assess bone height and width, and to identify vital structures like the maxillary sinus or mandibular nerve.
- Orthodontic assessment: To evaluate tooth development, eruption patterns, and jaw relationships.
- Suspected cysts or tumors: To detect large lesions that may not be visible clinically.
- Sinus issues: To check for sinusitis or other sinus pathology that may mimic dental pain.
- Pre-surgical evaluation: Before complex extractions or jaw surgery.
If you have no specific symptoms, a routine check-up may not require an OPG. Your dentist will decide based on your individual needs.
How to Prepare and What to Expect During the Scan
Preparation is simple. You do not need to fast. Remove any metal objects from your head and neck area, such as eyeglasses, earrings, necklaces, hairpins, and dentures (if they are removable). Inform your dentist if you are pregnant or suspect you might be—while the radiation dose is very low, elective X-rays are usually postponed until after delivery unless there is an urgent clinical need.
The procedure itself is quick and painless. You will either stand or sit in a special chair. Your chin rests on a small support, and you bite on a plastic block to keep your mouth slightly open. The machine then rotates around your head for about 10–20 seconds. You must stay perfectly still and hold your breath briefly to avoid blurring the image. The entire appointment usually takes less than 10 minutes.
Regarding radiation safety, an OPG exposes you to roughly 5–30 microsieverts (µSv), which is comparable to a few days of natural background radiation. This is far lower than a medical CT scan of the jaws. A lead apron is typically provided to minimize exposure to the rest of your body. The benefits of accurate diagnosis almost always outweigh the minimal risk, but you should always discuss any concerns with your dentist.
OPG Cost in Bangladesh: What You Can Expect to Pay
The cost of an OPG in Bangladesh varies depending on the city, the type of facility (private diagnostic lab vs. dental hospital), and whether you receive a printed film or a digital copy (CD/DVD). Prices are generally higher in Dhaka and other metropolitan areas, and lower in smaller towns. The following table gives approximate ranges based on typical private-sector charges. Always call ahead to confirm the current price and what it includes.
| Procedure | Approx. Cost (BDT) | Notes |
|---|---|---|
| OPG (panoramic X-ray) | 800 – 2,500 | Digital OPG with CD/DVD usually at the higher end; printed film may be cheaper. |
| OPG with CBCT (3D) – if needed | 3,000 – 8,000 | CBCT is more expensive and usually only required for implant planning or complex surgery. |
| Full mouth series (IOPA – 14–18 images) | 1,500 – 4,000 | Cost depends on number of images and whether digital or film. |
| Single intraoral periapical X-ray | 150 – 400 | Often used as a follow-up to an OPG for a specific tooth. |
Prices are indicative and may change. Government dental colleges (e.g., Dhaka Dental College) may offer OPG at a lower cost, but waiting times can be longer. Private diagnostic centers and dental clinics usually provide faster service.
How to Choose a Trusted Dental Clinic or Imaging Center
When you need an OPG in Bangladesh, it is important to choose a facility that follows proper safety and quality standards. Here are some practical tips:
- Check for qualified professionals: The X-ray should be taken by a trained radiographer and interpreted by a dentist or oral radiologist.
- Look for modern digital equipment: Digital X-ray systems use lower radiation and produce images that can be easily stored and shared.
- Ask about infection control: The facility should follow standard hygiene protocols, including using disposable barriers and sterilizing equipment.
- Read patient reviews: Online reviews and word-of-mouth recommendations can give you an idea of the quality of service.
- Confirm what you get: Ask whether the price includes a printed report, a digital copy, and a specialist’s interpretation.
If you are looking for a dental clinic or imaging center in your area, you can use the directory below to find options in your division.
| Division | Find listings |
|---|---|
| Dhaka | Find dental clinics in Dhaka |
| Chattogram | Find dental clinics in Chattogram |
| Khulna | Find dental clinics in Khulna |
| Rajshahi | Find dental clinics in Rajshahi |
| Rangpur | Find dental clinics in Rangpur |
| Sylhet | Find dental clinics in Sylhet |
| Barishal | Find dental clinics in Barishal |
| Mymensingh | Find dental clinics in Mymensingh |
Frequently Asked Questions
Is an OPG safe, and how much radiation does it involve?
OPG is considered a low-radiation dental X-ray, and the dose is generally acceptable for routine diagnostic use. The amount is similar to, or only slightly higher than, a few conventional dental X-rays, but the exact level varies with the machine and image settings. The technician will usually provide a lead apron or thyroid collar to further reduce exposure. Tell your dentist if you have had many X-rays recently, and always inform them if you are or might be pregnant. No X-ray is completely zero-risk, so clinicians recommend OPG only when it is genuinely needed.
Can I have an OPG during pregnancy or while breastfeeding?
Routine OPG is usually postponed during pregnancy unless there is a dental emergency, because the developing baby is more sensitive to radiation. Always inform your dentist and technician about your pregnancy before the scan; if imaging is essential, they will use extra shielding and limit exposure. A single diagnostic OPG while breastfeeding is generally considered safe, and no special break from feeding is required, but it is best to confirm with your clinician.
What is the difference between an OPG and a CBCT?
An OPG produces one flat, panoramic (2D) image of the whole mouth, while CBCT (cone beam computed tomography) builds a three-dimensional view of the teeth, jaws, and facial structures. OPG is a broad screening tool, very useful for wisdom teeth, general bone health, and detecting hidden problems. CBCT provides more detailed cross-sectional information and is typically reserved for dental implant planning, complex root canals, or assessing impacted teeth. Your dentist chooses the test based on what specific information they need; they are not interchangeable.
I have a strong gag reflex. Will the OPG be uncomfortable?
Many people worry about gagging during an OPG. The scan involves holding still while the X-ray arm rotates around your head, and you bite gently on a small plastic stick to keep your jaws separated. For most patients, the whole process lasts only about 10 to 20 seconds, which limits discomfort. If you have a sensitive gag reflex, let the technician know beforehand; they can pause, reposition you, or occasionally use a local anaesthetic spray to make the bite block more tolerable. Breathe slowly through your nose and try to relax your throat — the sensation normally passes as soon as the scan ends.
When will I get my OPG results, and who explains them to me?
With digital X-ray systems, the OPG image is usually available immediately on a computer screen. In a typical dental clinic, your dentist will review the image during the same visit and explain the findings in simple language. In a dedicated imaging centre, a radiologist may issue a formal written report, which can take anywhere from a few hours to one working day. The clinic will share both the image and the report with you, and your dentist will discuss what the results mean for your treatment plan.
Key takeaways
An OPG is a valuable, low-radiation screening tool that gives your dentist a panoramic view of your entire mouth. It helps diagnose wisdom tooth problems, jaw issues, and plan treatments like implants or orthodontics. While it is not a substitute for detailed intraoral X-rays, it is often the first step in a thorough dental evaluation. In Bangladesh, the cost is affordable and varies by location and facility. Always consult a qualified dentist to determine if an OPG is right for you and to interpret the results accurately. Your dental health is best managed with professional guidance, not self-diagnosis.
Sources
The following sources are from international journals, government health agencies, or recognized medical organizations:
- World Health Organization — Orthopantomogram (OPG / Full Mouth X-Ray) (who.int)
- MedlinePlus — Orthopantomogram (OPG / Full Mouth X-Ray) (medlineplus.gov)
- CDC — Orthopantomogram (OPG / Full Mouth X-Ray) (cdc.gov)
- NHS — Orthopantomogram (OPG / Full Mouth X-Ray) (nhs.uk)
- PubMed — Orthopantomogram (OPG / Full Mouth X-Ray) (pubmed.ncbi.nlm.nih.gov)
- Mayo Clinic — Orthopantomogram (OPG / Full Mouth X-Ray) (mayoclinic.org)
