Influence of Marginal Tooth Preparation Designs on Periodontal Health and Long-Term Stability: A Narrative Review
Tareq Hajaj, Mihai Rominu, George Dumitru Constantin, Maria Dobos, Ioana Veja

TL;DR
This paper reviews how different tooth preparation designs affect periodontal health and long-term dental restoration stability.
Contribution
The paper introduces and evaluates the Biologically Oriented Preparation Technique (BOPT) as a potential alternative to conventional designs.
Findings
Horizontal tooth preparation designs may lead to inflammation and marginal instability.
BOPT is associated with stable probing depths and better esthetic outcomes.
Digital workflows with BOPT improve precision and reproducibility.
Abstract
Background: Tooth preparation design strongly influences the long-term success of fixed prosthodontic restorations, affecting periodontal stability and esthetic outcomes. Conventional horizontal designs such as chamfer and shoulder remain widely used but present biological and technical limitations. The Biologically Oriented Preparation Technique (BOPT), a vertical approach, has been proposed as an alternative. Methods: This narrative review synthesizes evidence from clinical trials, histological investigations, and systematic reviews, comparing horizontal preparations with BOPT with emphasis on periodontal parameters and the role of digital workflows. Results: Horizontal designs provide predictable outcomes but may predispose to inflammation and marginal instability, especially with subgingival margins. BOPT has been associated with greater gingival thickness, stable probing depths,…
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Taxonomy
TopicsPeriodontal Regeneration and Treatments · Dental Implant Techniques and Outcomes · Oral microbiology and periodontitis research
