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Post design and its impact on the root and crown.
Barry Lee Musikant1, Allan S Deutsch
1Essential Dental Systems, South Hackensack, New Jersey 07606, USA.
Compendium of Continuing Education in Dentistry (Jamesburg, N.J. : 1995)
|February 24, 2006
Summary
Proper dental restoration requires engineering principles like ferrules. The split-shanked Flexi-Post and Flexi-Flange design is recommended for optimal post-and-core longevity and stress distribution.
Area of Science:
- Restorative Dentistry
- Biomaterials Engineering
- Prosthodontics
Background:
- Optimizing the longevity of dental restorations is crucial for patient outcomes.
- Proper tooth preparation and post selection are key factors in restoration success.
- Insufficient coronal tooth structure often necessitates post-and-core procedures.
Purpose of the Study:
- To emphasize the importance of engineering principles in post-and-core restorations.
- To evaluate the ideal characteristics of posts for supporting restorations.
- To advocate for specific post designs that meet these criteria.
Main Methods:
- Review of engineering principles relevant to dental restorations.
- Analysis of post characteristics including insertional stresses, retentive values, and stress distribution.
- Evaluation of different post designs based on established criteria.
Main Results:
- The necessity of internal or external ferrule for restoration longevity is highlighted.
- Porcelain-fused-to-metal restorations are indicated when internal ferrule support is insufficient.
- The split-shanked design (Flexi-Post and Flexi-Flange) is proposed as superior for achieving low insertional stresses, high retention, and even stress distribution.
Conclusions:
- Adherence to engineering principles is paramount for durable dental restorations.
- The split-shanked post design offers a unique combination of beneficial properties.
- Post placement should aim to reinforce coronal structure without compromising root integrity.