C1-C3 fusion with six screws and hourglass-shaped titanium plate 15 years ago. Can the hardware potentially cause Eustachian tube sensitivity problems?

Slim possibility. Difficult to define how the body will react to metal implants if sensitization develops. Local inflammation leading to Eus. tube problems seems feasible, but unlikely. Perhaps more likely is throat irritation from acid reflux, postnasal drip or allergic or non-allergic rhinitis. If the hardware becomes unstable, then other symptoms would predominate.