A prosthodontist replaces and restores teeth. A periodontist treats the gums and bone that hold teeth in place. Both are dental specialists who complete years of training beyond dental school, but they focus on entirely different parts of your mouth. Understanding what each one does helps you know which specialist you need, especially since complex dental work sometimes requires both.
What a Prosthodontist Does
Prosthodontists specialize in replacing missing or damaged teeth with custom-made restorations. The American Dental Association defines prosthodontics as the specialty focused on “rehabilitation and maintenance of oral function, comfort, appearance, and health” for patients with missing or deficient teeth. In practical terms, this is the specialist you see when teeth need to be rebuilt or replaced entirely.
Their core procedures include dental crowns, bridges, full and partial dentures, and implant-supported restorations. If you’ve lost most or all of your teeth, a prosthodontist can design both removable options (like dentures) and permanent ones anchored to implants. They also handle complex cosmetic cases where multiple teeth need reshaping or replacing to restore a functional bite.
Think of a prosthodontist as the architect and builder of the visible parts of your smile. They design the replacement teeth, choose materials, and ensure everything fits, looks natural, and functions properly when you chew or speak.
What a Periodontist Does
Periodontists treat the structures that surround and support your teeth: gums, the bone underneath them, and the ligaments connecting teeth to bone. Their work centers on preventing, diagnosing, and treating gum disease in all its stages.
The first line of treatment is usually non-surgical. Scaling and root planing, a deep cleaning procedure, removes bacterial buildup, hardened plaque, and toxins from below the gumline. When gum disease has progressed further, periodontists perform surgical procedures including gingivectomy (removing diseased gum tissue), bone grafting to regenerate lost bone, and gum grafting to repair receding gumlines using tissue from elsewhere in your mouth or donor material.
Periodontists also surgically place dental implants. Because implants are anchored directly into the jawbone, the procedure falls squarely within a periodontist’s expertise in bone and soft tissue. General dentists typically refer patients to a periodontist when they have deep gum pockets (greater than 5 millimeters), more than 50% bone loss around teeth, loose teeth, severe or rapidly worsening gum disease, or necrotizing periodontal conditions. Patients with certain medical conditions like diabetes or infectious diseases are also commonly referred, since these can complicate gum treatment.
How They Work Together on Implants
Dental implants are the clearest example of how these two specialists collaborate. The process typically unfolds in stages, with each specialist handling their area of expertise.
The periodontist performs the surgical phase: placing the titanium implant post into your jawbone and, if needed, doing bone or gum grafts beforehand to make sure there’s enough healthy tissue to support it. After surgery, there’s a healing period of several months while the implant fuses with the bone, a process called osseointegration.
Once the implant is solidly anchored, the prosthodontist takes over. They design and attach the visible restoration, whether that’s a single crown, a bridge, or a full set of implant-supported dentures. Their focus at this stage is aesthetics, fit, and long-term durability. Getting the shape, contour, and positioning of the restoration right matters not just for appearance but also for protecting the surrounding gum tissue. A poorly designed crown edge or an awkward shape where the restoration meets the gumline can irritate tissue and create new problems.
Research on the relationship between these specialties confirms that harmony between a prosthesis and the surrounding gum tissue is critical. Without close coordination, the result can compromise both the longevity of the restoration and the health of the gums, potentially requiring expensive retreatment.
Training and Certification
Both specialists complete four years of dental school to earn a general dentistry degree before entering a residency program. Periodontics residencies require a minimum of three consecutive years (at least 30 months of instruction). Prosthodontics residencies are a minimum of 33 months. During these programs, residents get intensive hands-on training in their specialty, treating complex cases under supervision.
After residency, both can pursue board certification through their respective boards. The American Board of Periodontology requires candidates to pass a written qualifying exam followed by a separate oral exam. The American Board of Prosthodontics uses a multi-section process that includes a computerized written exam, patient treatment presentations, and oral examinations conducted by board examiners. Board certification is voluntary but signals that a specialist has demonstrated expertise beyond the baseline requirements of their residency.
Which Specialist Do You Need?
The simplest way to think about it: if your problem is with the foundation (gums and bone), you need a periodontist. If your problem is with the structure built on that foundation (the teeth themselves, whether natural or artificial), you need a prosthodontist.
- Bleeding, swollen, or receding gums: periodontist
- Loose teeth caused by bone loss: periodontist
- Missing teeth that need replacing with dentures, bridges, or implant crowns: prosthodontist
- Broken, worn-down, or badly damaged teeth needing full reconstruction: prosthodontist
- Needing a dental implant placed surgically: periodontist
- Needing the crown or denture attached to an existing implant: prosthodontist
In many complex cases, you’ll see both. Someone with advanced gum disease who has already lost several teeth, for example, would typically visit a periodontist first to get the gum disease under control and rebuild bone where needed, then see a prosthodontist to replace the missing teeth. Your general dentist usually coordinates these referrals and can help determine which specialist to see first based on the condition of your gums, bone, and remaining teeth.