Final answer:
An indication for prescribing fixed prosthodontics, such as permanent bridges, is the presence of multiple missing teeth in a single arch. Adequate supporting teeth or implants are necessary to sustain the prosthetic devices and ensure successful dental restoration.
Step-by-step explanation:
An indication for prescribing fixed prosthodontics is that: there are multiple missing teeth in a single arch. Fixed prosthodontics, also known as permanent bridges, are indicated for patients with one or more missing teeth to restore function and aesthetics. They rely on remaining teeth, or sometimes implants, as supports for the prosthetic devices that span the gap where teeth are missing. When patients have multiple missing teeth in a single arch, fixed prosthodontics can be used to restore the dentition assuming the supporting teeth or implants are adequate to sustain a prosthesis.
The alternatives, such as removable dentures or dental implants, might be preferred by some patients, but they serve different needs and situations. For example, dental implants may be preferred by patients looking for a more permanent and stable solution, while removable dentures might be suitable for those who are not candidates for fixed prosthetics or implants.
Having fewer cavities and less severe cavities can often contribute to the success of fixed prosthetics, as the supporting teeth must be in good condition. Furthermore, permanent teeth, including wisdom teeth, typically emerge at certain stages in the human lifespan, and these stages must be considered when planning for prosthodontic treatment.