What is the likely diagnosis when a patient shows a normal reaction to cold testing, no percussion sensitivity, and no x-ray abnormalities?

A normal reaction to cold testing, combined with the absence of percussion sensitivity and no x-ray abnormalities, typically indicates a healthy tooth. Cold testing assesses the sensory function of the pulpal tissues, and a normal response suggests that the pulp is healthy and not inflamed. The lack of percussion sensitivity further confirms that there is no inflammation or pathology in the periapical tissues, which would often lead to discomfort upon chewing or tapping the tooth. Lastly, the absence of x-ray abnormalities means there are no signs of decay, infections, or structural problems that would otherwise lead to a diagnosis of conditions like reversible pulpitis, irreversible pulpitis, or a root fracture. This comprehensive assessment of clinical and radiographic findings points to the conclusion that the tooth is normal and functional.