There is no single “best” permanent dental cement. The right choice depends on what your crown is made of, where it sits in your mouth, and how much natural tooth structure remains. The two most commonly used categories today are glass-ionomer cements and resin cements, and each has clear strengths in different situations. Understanding what makes them different will help you have a more informed conversation with your dentist.
The Main Types of Permanent Dental Cement
Permanent dental cements fall into two broad families: water-based and resin-based. Water-based options include glass-ionomer, resin-modified glass-ionomer, zinc phosphate, and zinc polycarboxylate cements. These release fluoride, which offers some protection against decay at the margins of a crown. Resin-based cements are chemically similar to tooth-colored filling materials and create the strongest bond between a restoration and the underlying tooth.
Zinc phosphate cement has been used for over a century and still performs reliably, but it has largely been overtaken by newer materials. Glass-ionomer and resin cements now dominate because they offer better adhesion, better aesthetics, or both.
Why Crown Material Determines the Cement
The material your crown is made from plays a bigger role in cement selection than most patients realize. Data from the National Dental Practice-Based Research Network shows a clear pattern: dentists bond about 71% of lithium disilicate (e.max) crowns and 77% of glass-ceramic crowns with resin cement, while only about 30% of full-contour zirconia crowns get the same treatment. The rest of those zirconia crowns are typically cemented with glass-ionomer or resin-modified glass-ionomer.
The reason is straightforward. Zirconia is roughly twice as strong as lithium disilicate and doesn’t need an adhesive bond for structural support. A conventional cement holds it in place just fine. Glass-ceramic and lithium disilicate crowns, on the other hand, are more translucent and lifelike but benefit significantly from the added strength that a bonded resin cement provides. Resin cement also comes in shades that complement the translucency of these materials, so the final result looks more natural.
For porcelain-fused-to-metal and full-metal crowns, bonding with resin cement is even less common (around 14-15% of cases) because the metal substructure already provides plenty of strength.
Self-Adhesive Resin Cement: The Versatile Option
Self-adhesive resin cements have become one of the most popular choices in dentistry, and for good reason. They bond directly to the tooth surface without requiring separate etching, priming, or bonding steps. That simplicity reduces the chance of errors during cementation and saves chairtime.
For zirconia restorations specifically, self-adhesive resin cements perform well. A meta-analysis comparing cement types found that self-adhesive resin cement produced significantly higher bond strength to zirconia than resin-modified glass-ionomer, conventional glass-ionomer, and zinc phosphate cements. Many of these cements contain a specialized bonding molecule (called 10-MDP) that chemically attaches to the oxide layer on zirconia’s surface, creating a durable connection that resists breakdown from moisture and temperature changes over time.
Self-adhesive cements also cause less post-operative sensitivity than traditional etch-and-rinse resin cements. Rather than stripping away the natural layer on freshly prepared tooth surfaces, they modify it in place. This keeps the microscopic channels in your tooth sealed, reducing the risk of irritation to the nerve inside.
When Glass-Ionomer Cement Works Best
Glass-ionomer and resin-modified glass-ionomer cements shine in situations where moisture control is difficult. If your crown margin sits below the gumline or in a hard-to-isolate area, these cements are more forgiving because they tolerate moisture better than resin-based options. They also release fluoride over time, which can help protect the tooth at the edges of the restoration where decay is most likely to develop.
Resin-modified glass-ionomer offers better adhesion than traditional glass-ionomer while retaining that moisture tolerance. In retention testing on implant-supported crowns, resin-modified glass-ionomer produced about 338 newtons of holding force, which is lower than resin cement (around 581 newtons) or zinc phosphate (around 529 newtons), but more than sufficient for most clinical situations. The tradeoff is worth it when the priority is fluoride release, ease of use, or the ability to work in less-than-ideal conditions.
Cement for Implant-Supported Crowns
Implant crowns add another consideration: retrievability. Unlike a natural tooth, an implant may eventually need the crown removed for maintenance or to address complications. Permanent resin cement creates the strongest hold, but it can make removal extremely difficult or even impossible without cutting the crown off.
For this reason, many clinicians use semi-permanent or provisional cements on implant-supported crowns. These provide enough retention to keep the crown securely in place during daily use but allow the dentist to pop it off when necessary. Specialized implant cements made from non-eugenol resin are designed for exactly this purpose: they create a tough, elastic seal that holds firm yet releases cleanly when intentional force is applied.
When permanent cementation on an implant is the goal, resin-modified glass-ionomer, zinc phosphate, and resin cement are all considered appropriate. The choice usually comes down to whether your dentist wants to preserve the option of future removal.
Post-Cementation Sensitivity
If you’ve ever had a new crown feel sensitive to cold or biting pressure for a few weeks, the cement type may have played a role. Cements that require acid-etching of the tooth before placement tend to cause more sensitivity. The etching process strips away a protective layer on the prepared tooth and opens tiny channels that can allow irritants to reach the nerve.
Clinical studies show that self-adhesive resin cements and self-etch systems produce significantly less post-operative sensitivity than etch-and-rinse approaches. In one study, patients cemented with etch-and-rinse resin cement reported substantially higher pain scores at every follow-up visit. Self-adhesive cements, by contrast, showed biting sensitivity below 5% at the two-week mark, and one self-adhesive product produced zero biting sensitivity across all time points.
Excessive air-drying during the procedure and insufficient water-cooling during tooth preparation can also contribute to sensitivity, regardless of cement type.
How Technique Affects the Result
Even the best cement can fail if the cementation process isn’t done carefully. For glass-ceramic crowns, the inside surface is typically etched with hydrofluoric acid, cleaned, and then treated with a coupling agent to improve bonding. Zirconia crowns are sandblasted on the inside and treated with a specialized primer. Skipping or rushing these surface preparation steps weakens the bond significantly.
The thickness of the cement layer matters too. For resin cements under ceramic crowns, research suggests an optimal layer of 150 to 200 micrometers. Too thin (50 micrometers) and bond strength drops to roughly 9 megapascals. At 200 micrometers, it climbs to about 17 megapascals. This is largely controlled by the fit of the crown itself, which is why a well-made restoration with precise margins is just as important as the cement holding it in place.
Adhesive resin cements are the most technique-sensitive option. They deliver the highest bond strength and best aesthetics, but they demand careful moisture control and multiple steps executed correctly. Self-adhesive cements trade a small amount of performance for much greater reliability in everyday clinical conditions. Newer bioceramic cements, which combine calcium aluminate with glass-ionomer chemistry, aim to offer high strength and aesthetics with minimal steps and good moisture tolerance, though they’re still gaining traction in widespread clinical use.