Peri-Implantitis and Periodontitis: Biological Convergence, Contextual Divergence.

Area of Science:

• Oral biology and pathology
• Periodontology
• Implant dentistry

Background:

• Periodontitis and peri-implantitis are chronic inflammatory diseases affecting teeth and implants, respectively.
• Despite similar features, they are often classified separately due to anatomical and clinical context.
• Understanding their relationship is crucial for effective treatment strategies.

Purpose of the Study:

• To evaluate clinical, microbiological, histological, and molecular evidence comparing periodontitis and peri-implantitis.
• To determine if observed differences represent distinct diseases or variations within a shared inflammatory spectrum.
• To assess the current evidence base for categorizing these conditions.

Main Methods:

• Narrative, question-driven review of existing literature.
• Analysis of clinical, microbiological, histological, and molecular data.
• Evaluation of study design, nomenclature, and comparison methodologies.

Main Results:

• No exclusive microbial species or host pathways identified for either condition.
• Evidence suggests overlapping immune activation and gene expression patterns.
• Differences in disease progression and inflammation may be influenced by anatomical and host-specific factors, but are not definitively disease-specific.

Conclusions:

• Current evidence supports convergence in pathogenic pathways for periodontitis and peri-implantitis, modulated by site-specific and host-specific factors.
• Categorical distinction as separate entities remains premature due to limited and inconsistent research.
• Future research requires robust, longitudinal, within-subject comparisons and advanced molecular techniques.