Periodontitis involves progressive destruction of the periodontium. Its main features are clinical attachment loss (CAL), radiographic alveolar bone loss, periodontal pockets, and bleeding. The disease is further defined by stage and grade. Stage describes its severity, extent, distribution, and expected treatment complexity. Grade reflects additional biological factors, including observed or anticipated progression, predicted treatment outcomes, and the risk that the disease or its treatment may adversely affect overall health.
Periodontitis is a major public health concern because of its high prevalence and associated morbidity. Severe disease can impair chewing and appearance, lead to tooth loss and edentulism, contribute to social inequality, and substantially reduce quality of life. It can also negatively affect general health and generate significant oral healthcare costs.
Periodontitis is associated with several systemic conditions, including diabetes, cardiovascular disease, and adverse pregnancy outcomes. It is also independently associated with premature death from all causes or cardiovascular disease.
The distinction between stage III and stage IV periodontitis is based mainly on the consequences of advanced loss of periodontal support. These may include tooth loss leaving less than 20 teeth (less than 10 opposing pairs), masticatory dysfunction, tooth mobility of grade 2 or higher, severe alveolar ridge defects, and occlusal collapse (e.g., drifting, flaring). These features make stage IV treatment more complex and require an interdisciplinary approach to restore the dentition.
Unlike stage III treatment, stage IV treatment must maintain or re-establish a functional dentition and include rigorous supportive care before, during, and after rehabilitation. Compared with stage I disease, stage IV periodontitis carries a greater risk of periodontal tooth loss over 10–30 years, as well as pathological tooth migration and other functional complications.
Without treatment, or when treatment is inadequate or incomplete, the risk of further loss of tooth-supporting tissues increases and may result in complete edentulism. Untreated severe periodontitis can therefore cause substantial tooth loss in adults.
The European Federation of Periodontology (EFP) developed an S3 level clinical practice guideline for treating stage IV periodontitis. It emphasizes the interdisciplinary care needed to treat the disease and rehabilitate clients affected by its associated complications and tooth loss.
The guideline was developed using rigorous, validated methods to identify the best available evidence on intervention effectiveness. Recommendations were then established through a structured consensus process involving experts and representatives of key interest groups.
To simplify the clinical guideline, four major phenotypes of stage IV periodontitis were recognized, corresponding to the following case types:
- Case type 1: Clients with tooth hypermobility caused by secondary occlusal trauma that can be corrected without tooth replacement.
- Case type 2: Clients with pathological tooth migration (i.e., tooth elongation, drifting, flaring) that is amenable to orthodontic correction.
- Case type 3: Partially edentulous clients who can be restored prosthetically without full-arch rehabilitation.
- Case type 4: Partially edentulous clients whose dentition requires full-arch rehabilitation using tooth-supported, implant-supported, or implant-retained prostheses.
This S3 level guideline provides recommendations on orthodontic tooth movement, tooth splinting, occlusal adjustment, tooth- or implant-supported fixed and removable prostheses, and supportive periodontal care. Before treatment planning, clinicians should complete a definitive diagnosis and comprehensive case assessment, gather relevant client information, and conduct frequent re-evaluations during and after treatment. Periodontal therapy should follow the clinical practice guideline for stages I–III periodontitis.
Applying this S3 level guideline supports a consistent, interdisciplinary, evidence-based approach to managing stage IV periodontitis.
The EFP has produced infographics to support interpretation and application of the EFP clinical practice guideline for treating stage IV periodontitis:
