If you’re thinking about getting a dental implant, pause for a minute and run a quick health check. Not everyone is a good candidate, and overlooking a red flag can turn a smooth procedure into a long recovery. Below we break down the most common reasons doctors say “no” or ask you to fix a problem first.
Uncontrolled diabetes – High blood sugar weakens healing. If your A1C is over 7 %, dentists usually ask you to bring it down before cutting into bone.
Severe osteoporosis or low jaw bone density – Implants need solid bone to hold. A CT scan can reveal if the jaw is too soft. Sometimes bone grafts are required, but in extreme cases the implant may not be feasible.
Radiation therapy to the head or neck – Radiation damages blood vessels and slows tissue repair. Doctors often wait 6‑12 months after treatment, and even then the success rate drops.
Auto‑immune disorders like lupus or rheumatoid arthritis can interfere with the body’s ability to integrate the implant. If you’re on heavy immunosuppressants, discuss a tailored plan with your oral surgeon.
Bleeding disorders – Conditions like hemophilia, or taking blood thinners such as warfarin, increase the risk of excessive bleeding during surgery. Your physician may adjust medication or suggest an alternative.
Smoking – Nicotine narrows blood vessels and slows bone healing. Even occasional smoking can raise implant failure rates. Most dentists ask you to quit for at least two weeks before and after surgery.
Active gum disease (periodontitis) – Infected gums won’t support an implant. A deep cleaning and possibly antibiotics are needed first.
Poor oral hygiene – If you’re not brushing and flossing regularly, plaque can build up around the implant and cause infection.
Heavy alcohol use – Alcohol can impair bone regeneration. Moderation or a short break before surgery helps improve outcomes.
Medications that affect bone growth – Drugs like bisphosphonates (used for osteoporosis) can cause a rare condition called osteonecrosis of the jaw. Your dentist will evaluate dosage and treatment length.
Age alone isn’t a deal‑breaker, but seniors often have weaker bone or multiple health issues that need extra screening. A thorough evaluation, including X‑rays and a medical history review, is the only way to know if you’re a good fit.
Bottom line: The safest implants happen when you and your dentist have a clear picture of any health or lifestyle hurdles. Fix what you can—quit smoking, control diabetes, treat gum disease—and you’ll boost the odds of a strong, lasting smile.
Not everyone is a good candidate for dental implants. This article covers who should not get dental implants and highlights conditions, risks, and safer alternatives.
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