onearm_gardener said:
the new dentist asked, on the form, whether I need antibiotic cover because of a joint replacement
Both good questions, and the answers are linked. General information only; your own team's advice comes first.
On the dentist: for most people, no. The American Dental Association's guideline says that, in general, people with prosthetic joint implants do not need prophylactic antibiotics before dental procedures to prevent joint infection, based on a review that found no association between dental procedures and joint infections. The practice your hip friend describes was common years ago and has largely been dropped. There are exceptions, for example someone with a previous infection or other complication of the joint, or conditions that lower resistance to infection, and in those cases the dentist, the orthopaedic team, and the patient decide together, with the orthopaedic surgeon generally recommending any antibiotic. Your dentist was right to ask; the right response is to tell them you have a replacement and, if in doubt, let them check with your surgical team, as Margaret's did. Many units give a standard answer in a sentence.
On the follow-up: "see you in two years" is entirely normal after a good first year. Infection and wound problems are mostly early issues, and by a year the shoulder has usually reached most of its result. The later X-rays look for things you will not feel at first: bone changes around the components that suggest loosening, wear, and, around a hemiarthroplasty, wear of your own socket where the metal ball sits against natural cartilage. Comparing films over time shows whether anything is changing. Between visits, the reasons to get in touch early are change in the shoulder: new pain once it has settled, a loss of movement or strength, a fall onto the arm, or redness, swelling, or fever. And an infection elsewhere, a tooth abscess included, is worth treating promptly rather than leaving, because bacteria in the bloodstream can reach a replacement even years later.
The site has just published a full piece on this, follow-up after shoulder replacement, covering the review schedule, the X-rays, and the dental guidance. What applies to your particular operation is something your own surgeon can confirm at the next visit.