Temporary & Permanent Dental Glue For Crowns

What is permanent dental glue for crowns? Well, glue is the common term used for dental glue, and the permanent dental glue is the adhesive used for a fixed restoration that permanently attaches the abutment teeth with the crowns. 

Dental glue for crowns are classified into two categories:

•    Temporary dental glue
•    Permanent dental glue

Before we dive deep into these categories, let us look at how dental glues work.

While some dental glues create resistance and retention upon compression, others are manufactured to form stable chemical bonds. The chemically bonding glues provide an unbreakable connect and are recommended for severe cases. For instance, patients with the habit of grinding their teeth often will find this chemically-bonded glue to be more helpful than the other categories.

Types of Dental Glues

As said above, there are two types of dental glues - temporary & permanent. 

•    Temporary: Glues that are made to bind via a series of compression and other activities are called temporary glue. 
•    Permanent: Glues that can form chemical bonds and cannot be broken are called permanent glue. 

Temporary Dental Glue for Crowns

A temporary crown is placed until the patient gets his or her permanent crown fixed. It glues in temporary crowns that are weak and easy to breakable at later stages. 

This type of glue comprises of materials like:

•    Calcium hydroxide (low strength bases) 
•    Zinc oxide
•    Eugenol (low as well as high strength bases) 
•    Zinc oxide powder
•    Olive oil

Permanent Dental Glue for Crowns

This is different from the temporary glue in several ways. Some permanent glues are glass ionomer, resin glues, zinc phosphate, and resin-modified glass ionomer. 

However, zinc phosphate is credited to be one of the oldest and dependable glues to have been used for permanent crowns. The later ones are glass ionomer (GI), and resin-modified glass ionomer (RMGI), which are known to be made from polyacrylic acid liquid and fluoroaluminosilicate glass powder. 

Hydrophilic methacrylate monomers also add to the constituents of RMGI. The resin glues comprise of dmethacrylates and synthetic resins. They impact the strength and consistency of the glue. 

Let us take an in-depth look at these types of glues.

  •    Glass Ionomer: GI is used for the restoration of orthodontic brackets, restoring abased region near the gums, and used to bond the dentin. It is available in the form of glass (made of water, itaconic acid, tartaric acids, and maleic acid) and powdered version (made of aluminum oxide, calcium, and zinc) •    Zinc-Oxide Eugenol: This type of glue is used for temporary as well as restorations. It is available in liquid form (comprising of water, calcium chloride. Ascetic acid and eugenol) and powdered version (made from silica, magnesium oxide, and zinc oxide).
•    Composite Resin: A flexible material, it has a low film thickness and high insolubility property, which makes it perfect for permanent restorations. It is usually deployed in the manufacturing of metal casting, ceramic veneers, and orthodontic brackets. 
•    Zinc Phosphate: Available in a liquid and powdered version, it has water, phosphoric acid, and aluminum phosphate and silica, magnesium oxide as well as zinc oxide respectively. 
•    Polycarboxylate: This type of glue is made up of itaconic acid, maleic acid, polyacrylic acid, tartaric acid, and water. The powdered version comprises of pure zinc oxide and is used for stainless steel crowns and permanent cementation of orthodontic bands.


temporary dental glue for crowns

Features of Permanent Dental Glue

•    Permanent dental glue for a crown is a sure shot way to maintain its strength and resistance. Since this type of glue forms a chemical bond, it is next to impossible to break it.
•    Such glue forms a strong bond with the teeth and does not waver from bonding with the sensitive dental tissues. 
•    They are highly compatible with dental tissues.
•    They encompass the entire surface under its cover and leaves no room for leakage or penetration of external factors.
•    The glue is high on-resistance, utility, aesthetics, and robust composition that does not dissolve or break apart. 

The Technique of Applying the Glue

•    Cleaning and disinfection of the crowns is mandatory. Dentists place a suction material like cotton rolls or rubber dams to devoid the mouth of any fluid.
•    The dental glue is prepared as per instructions. 
•    Once the desired result is achieved with the right consistency, the glue is carefully applied in the crown’s interiors, covering it completely.  
•    The crown is placed on the abutment teeth carefully to avoid any misplacement. 
•    Once the restoration process is done, the extra glue is wiped out. 
•    Post the procedure; patients must maintain diligent oral hygiene and visit the dentist in case of discomforts. 

Properties of an Ideal Glue

•    Avoid marginal leak.
•    Non-irritant which otherwise end up affecting the mouth, especially the tender areas of the gums. 
•    High resistance to physical as well as chemical stimuli and strength.
•    Should not dissolve in the mouth due to saliva or other fluids. 
•    Should have low film thickness. 
•    Must have high retention properties to keep the restoration process intact.
•    It should have substantial opacity for diagnostic purposes on radiographs. 
•    Compliant to dental tissues and other parts. 
•    Good aesthetics.

Benefits of Permanent Glue

•    Improved Stability: The permanent dental glue for crowns makes it easy for users to chew without the worry of harming their teeth or the crown since its high resistance leaves no scope for instability.
•    More Endurance: High resistance and retention by permanent glue make it highly durable against external stimuli.
•    More Control: Since the crowns are now correctly fixed, it provides the user with more freedom, flexibility, and control over their teeth and relevant activities.
•    Long-Lasting: Permanent glue creates a long-lasting chemical which is unbreakable. This results in the longevity of the crowns.  


To make the most of your dental crowns, it is essential to be aware of the dental glues that you choose. Discuss with your dentist about the usability and suspected reactions if any, and make the right choice for excellent oral health. Keep smiling!