How often should I get a Bitewing X-ray?

Low caries risk (3+ years cavity-free, good hygiene): every 2-3 years. Medium risk (1-2 new caries in 3 years): annually. High risk (3+ new caries in 3 years, periodontitis, diabetes, xerostomia): every 6-12 months. Children: every 2-3 years. Bitewing radiation dose is minimal (0.005 mSv = 2 hours of flight).

How much does caries diagnosis cost in Hamburg?

Basic (exam + Bitewing): free via GKV. Extended private diagnostics: DIAGNOdent 10-30 € per tooth, transillumination 5-15 €, CBCT 200-400 €. Private benefit: caries found 1-2 years earlier, treatment cheaper (filling 80-180 € vs endodontics 350-800 €). Positive ROI.

Are dental X-rays dangerous?

No. Bitewing X-ray: 0.005 mSv (millisievert), equivalent to 2 hours of flight. Natural background radiation in DE: 2.4 mSv per year. So 1 X-ray = 0.2% of annual natural dose. Patient limit: 1 mSv per year, allowing 200 Bitewings. Realistically dentist takes 2-4 per year. In pregnancy X-ray is avoided, but even accidental exposure poses minimal risk.

Can I ask my dentist for fewer X-rays?

Yes, that's your right (§ 630e BGB, right to information). Ask: «Is this X-ray really necessary?» The dentist will justify. With low risk, visual exam and Bitewing every 3 years is enough. But with suspected interproximal caries or caries under fillings, accurate diagnosis requires X-ray.

How do I know if I'm high caries risk?

5 factors: 1) 2+ new caries in last 3 years, 2) old fillings with cavities under them, 3) dry mouth (xerostomia) from medications, 4) diabetes or other systemic disease, 5) high sugar/acid consumption daily, 6) orthodontics (braces). With 2+ factors, dentist recommends enhanced monitoring.

Can I spot caries myself?

Only at late stages. Early signs visible only to dentist. Your signals: 1) white spot on tooth (demineralization), 2) dark spot in groove, 3) cold/hot sensitivity on specific tooth, 4) food gets stuck in tooth, 5) bad smell from one side of mouth. At these stages caries is already deep and needs a filling. Annual preventive exam catches it 1-3 years before symptoms.

Caries diagnosis: methods Bitewing, ICDAS, laser. How dentists find hidden caries

Yuri hadn't seen a dentist in 6 years. «My teeth don't hurt.» On exam, 3 small interproximal caries found via Bitewing X-ray. If he'd waited until pain, he'd need endodontics (350-800 € per tooth) instead of a simple filling (80-180 €). 70% of interproximal caries is invisible without X-ray.

Caries develops slowly. From the first white spot to tooth pain takes 1-4 years. During that time the patient doesn't know about the problem, but the dentist can find it. The earlier it's caught, the simpler and cheaper the treatment.

5 diagnostic methods

Visual exam + ICDAS

The dentist examines each tooth with mirror and magnifying loupe. Uses ICDAS (International Caries Detection and Assessment System) scoring: 0 healthy, 6 visible cavity. Accuracy: 60-70% for open surfaces. Weakness: can't see between teeth or under fillings. Cost: included in GKV exam.

Bitewing X-ray

2-4 bite X-rays. Shows caries between teeth and under fillings. Most important method for adults. Accuracy: 80-90%. Dose: 0.005 mSv per image (= 2 hours of flight). Frequency: low risk every 2-3 years, high risk annually. Cost: GKV-covered.

Laser fluorescence (DIAGNOdent, KaVo)

Laser shines on the tooth, calcified caries fluoresces. Device shows reading 0-99 (0 healthy, 30+ suspicious, 50+ caries). Accuracy: 85-95% for occlusal caries (chewing surfaces). Weakness: false positives from tartar, fluoride. Cost: 10-30 € private per tooth, not GKV.

Caries Detector (dye)

Special dye applied to the tooth during filling prep. Infected dentin stains, healthy doesn't. Helps remove only the affected tissue without overcutting healthy. Accuracy: high with correct application. Cost: included in filling price.

Transillumination (FOTI, Diagnocam)

Intense light shines through the tooth. Healthy tissue transmits light, caries appears dark. Radiation-free alternative for interproximal monitoring. Accuracy: 70-80%. Weakness: not for deep caries. Cost: 5-15 € private per exam, not GKV.

What works best for each situation

👨 Low-risk adult: exam + Bitewing every 2-3 years. Cheapest and effective. GKV-covered.

👩 High-risk adult (many fillings, periodontitis, diabetes): exam + Bitewing annually + DIAGNOdent. Early detection critical.

👶 Child 6-12: exam + DIAGNOdent (radiation-free when possible). Bitewing every 2-3 years only if at risk.

🤰 Pregnant: visual exam + DIAGNOdent. Avoid Bitewing (possible after birth). Caries Detector safe.

👵 Over 65 patient: exam + Bitewing annually. Root caries on receded roots is common in this age, Bitewing sees it.

🛡 Suspected hidden caries: combo DIAGNOdent + transillumination + Bitewing. Highest accuracy 95%.

Why GKV doesn't cover newer methods

GKV covers standard diagnostics: exam, Bitewing, OPG. Everything else is private.

💰 DIAGNOdent: 10-30 € private. Better than exam, but GKV deems standard exam sufficient.

💰 3D scan (CBCT/DVT): 200-400 € private. Only for suspected complex caries, cysts, or before implantation. GKV covers in specific cases.

💰 Caries Detector: included in treatment cost. Indirectly GKV-covered.

💰 Transillumination: 5-15 €. Radiation-free alternative for children and pregnant women. Private.

🛡 Zahnzusatzversicherung: covers 70-90% of private diagnostics. With insurance you can use modern methods at no out-of-pocket cost.

Caries diagnosis: 5 methods dentists use