Most people who assume they cannot get implants are wrong, and a few who assume they can are also wrong. Seoul Top Dental Hospital explains what actually decides candidacy.
The core requirements
Enough bone to anchor a fixture, gums free of active infection, and general health that supports minor oral surgery. All three are measurable: 3D CT for bone, examination for gums, medical history for the rest. None of them is guesswork.

Fixable disqualifiers
Insufficient bone is routinely rebuilt with grafting. Gum disease is treated first, then implants follow. Poorly controlled diabetes becomes acceptable once blood sugar is managed. These add time, not impossibility.
Conditions that need coordination, not cancellation
Osteoporosis medication, blood thinners and cardiac conditions require planning with your physician: adjusted protocols, not automatic refusal. Full disclosure of your medication list is the non-negotiable part.

The honest risk factors
Smoking meaningfully raises failure risk and deserves a frank conversation. Uncontrolled systemic disease and certain rare bone conditions may genuinely rule treatment out, and a proper screening will say so plainly.
Finding out where you stand
A recent panoramic X-ray or CT sent through Clinic in Korea gets you a preliminary answer before booking flights. Timelines and outcomes vary by individual condition.