Which condition is a contraindication for dental implants?

• A. Receiving IV bisphosphonate therapy
• B. Osteoporosis with low bone mass
• C. Extensive caries
• D. Poor oral hygiene

Answer: (A)

Systemic medications that affect bone turnover can make implants inappropriate because successful dental implants depend on good healing and osseointegration in the jawbone. IV bisphosphonate therapy significantly suppresses bone remodeling and repair in the jaw, which raises the risk of medication-related osteonecrosis of the jaw after invasive procedures like implant placement. This risk is higher with intravenous administration than with oral forms, so placing implants while a patient is on IV bisphosphonates is generally avoided or requires careful medical consultation and possible treatment postponement.

Osteoporosis with low bone mass, while a challenge, is not an absolute barrier to implants; with planning, augmentation if needed, and careful follow-up, implants can still succeed. Extensive caries indicates the need to address existing decay and overall dental health before implant therapy, but it does not by itself rule out implants. Poor oral hygiene increases the likelihood of peri-implant disease and implant failure over time, so it’s a significant risk factor to improve before or after placement, but it is not an outright contraindication.