Why PEEK Is Gaining Popularity in Digital Dentistry

Introduction

In recent years, PEEK (Polyetheretherketone) has emerged as a promising material in the field of digital dentistry. Known for its outstanding mechanical strength, biocompatibility, and processing versatility, PEEK is increasingly being adopted for a variety of dental applications—from implants to removable prostheses. As CAD/CAM technologies continue to reshape dental workflows, PEEK’s compatibility with digital processes has made it a material of growing interest among clinicians and technicians. This article explores the reasons behind PEEK's rising popularity in digital dentistry, highlighting its unique advantages, clinical applications, and future potential.

What is PEEK?

PEEK is a high-performance thermoplastic polymer in the polyaryletherketone (PAEK) family. Originally developed for aerospace and medical applications, it is now gaining recognition in dental circles due to its exceptional strength-to-weight ratio, chemical resistance, and biological safety.

In dentistry, PEEK offers a metal-free alternative that is lightweight yet strong, and can be easily milled using digital CAD/CAM systems. Its natural tooth-colored appearance and radiolucency further enhance its appeal in aesthetic and diagnostic applications.

Key Advantages of PEEK in Digital Dentistry

1. Biocompatibility and Safety

PEEK is inert and non-toxic, making it highly biocompatible with oral tissues. It doesn’t cause allergic reactions or irritation, which is particularly valuable for patients with sensitivities to metals or acrylic-based materials.

2. Exceptional Mechanical Properties

PEEK demonstrates high flexural strength and excellent fatigue resistance, making it suitable for long-term use in both permanent and semi-permanent restorations. It can withstand the functional stresses of chewing without cracking or deforming.

3. Lightweight and Comfortable

Compared to metal frameworks, PEEK is much lighter, which significantly improves patient comfort—especially for full-arch prosthetics and implant-supported overdentures.

4. Aesthetic Benefits

While not as translucent as ceramics, PEEK has a naturally tooth-colored tone that provides an acceptable aesthetic for non-visible or framework components. It doesn’t corrode or discolor over time.

5. Digital Process Compatibility

PEEK blocks are readily available for milling with CAD/CAM machines, making the fabrication process efficient and precise. Its machinability is superior to many traditional materials, reducing tool wear and saving chairside time.

6. Metal-Free Alternative

PEEK is ideal for patients seeking metal-free dentistry, as it offers strength and durability without the disadvantages of metallic materials, such as thermal conductivity or taste alterations.

7. Resistance to Chemicals and Plaque

Its low surface energy reduces plaque adhesion, and it’s highly resistant to acids, bases, and disinfectants—making it a hygienic choice for long-term restorations.

Common Applications of PEEK in Dentistry

1. Implant-Supported Frameworks

PEEK is widely used as a framework material for implant-supported dentures and bars, offering strength without the weight of metal.

2. Temporary and Permanent Crowns/Bridges

Its machinability and durability allow PEEK to be used for temporary restorations, and in some cases, for permanent posterior crowns—especially where aesthetics are less critical.

3. Removable Partial Dentures (RPDs)

PEEK offers flexible, metal-free clasps and frameworks for RPDs, delivering a better patient experience and reduced allergenic risk.

4. Occlusal Splints and Night Guards

Its resistance to wear and comfort in the mouth make PEEK ideal for occlusal guards and bruxism appliances.

5. Orthodontic Devices

PEEK is increasingly being explored in orthodontic brackets and wires, as its mechanical strength and biocompatibility meet the requirements for long-term intraoral use.

The Future of PEEK in Dentistry

With the rapid advancement of digital workflows, materials like PEEK that integrate seamlessly into CAD/CAM and 3D printing technologies are expected to see continued growth. Researchers are working on improving its surface bonding characteristics and color stability to expand its application in aesthetic zones. Combined with new composite coatings and veneering techniques, PEEK is poised to become even more versatile in dental care.

Conclusion

PEEK is fast becoming a go-to material in digital dentistry, thanks to its combination of biocompatibility, mechanical strength, lightweight comfort, and digital processing compatibility. As clinicians continue to seek materials that offer durability, aesthetics, and patient comfort, PEEK stands out as a modern solution for many restorative and prosthetic needs.

By embracing the capabilities of PEEK, dental professionals can offer patients a metal-free, reliable, and digitally efficient alternative—supporting better outcomes and long-term satisfaction.