The screw inside a dental implant, properly called the abutment screw, is the small titanium fastener that passes through the abutment and threads into the implant fixture, clamping crown, abutment and fixture into one rigid unit. It is a separate part from the implant fixture, the threaded body that integrates with bone; the screw holds the parts together against daily bite load. Screw loosening is the most common technical complication of implant single crowns, with a cumulative 5-year incidence of 8.8% (95% CI 5.1 to 15.0) in a meta-analysis of 46 studies (PubMed 23062124).
- 01An implant restoration has three separate parts plus a fastener: the fixture in bone, the abutment above it, the crown on top, and the abutment screw that clamps all three together.
- 02Screw loosening reached a cumulative 5-year incidence of 8.8%, ahead of loss of retention at 4.1% and veneering ceramic fracture at 3.5% on implant single crowns (PubMed 23062124).
- 03Screw loosening stayed the most prevalent prosthesis complication across implant diameters in a review of 18 clinical studies, reported at 1.73% for narrow, 4.08% for standard and 12.45% for wide-diameter implants (PubMed 39889227).
- 04The screw is tightened with a calibrated torque wrench to the manufacturer's value, because both under-tightening and over-tightening change how the joint behaves under load.
- 05The screw normally outlives the restoration: implants supporting single crowns showed 97.2% survival at 5 years and 95.2% at 10 years in the same meta-analysis (PubMed 23062124).
Dental implants are one of the established solutions for replacing missing teeth. When patients learn about implant treatment, they often imagine the visible crown the tooth that looks natural and aesthetic. However, a key part of implant treatment sits out of sight, inside the implant: the dental implant screw.
Dental Implant Screw and Implant Components
What Is a Dental Implant Screw
A dental implant screw is a small but important component that connects the implant fixture (the artificial tooth root) to the abutment and crown.
In simple terms, the parts sit in this order:
- Implant fixture → placed inside jawbone
- Abutment → connector piece
- Crown → visible tooth
- Implant screw → holds everything together
Without the implant screw, the dental implant system would not function as a stable and durable tooth replacement.
Understanding Dental Implant Components
To fully understand the implant screw, we must first understand the dental implant structure. A dental implant restoration has three main parts, plus the screw that joins them.
Implant Fixture (Titanium Root)
The part surgically placed inside the jawbone.
Abutment
The connector that links the implant to the crown.
Crown (Artificial Tooth)
The visible part that looks like a natural tooth.
Implant Screw (Abutment Screw)
The dental implant screw connects the abutment to the implant fixture securely.
This tiny component is responsible for long-term stability and function.
Why Is the Dental Implant Screw So Important
The dental implant screw plays a key role in the success of implant treatment. Its main functions are to provide mechanical stability, prevent crown movement, maintain bite strength and support long-term durability.
Without a properly designed implant screw, the implant crown could loosen or fail over time.
What Is an Abutment Screw
In this guide, the implant screw means the abutment screw, also called the prosthetic screw. It is not the implant itself: the threaded fixture placed in the jawbone is a separate part, and the abutment is the connector that sits on that fixture. The abutment screw sits inside the implant fixture and is tightened to a set torque, which clamps the abutment onto the fixture and locks the prosthetic tooth in place (PubMed 8040822).
This tiny screw must withstand enormous chewing forces every day.
Dental Implant Screw Material and Function
What Material Is the Implant Screw Made Of
Most dental implant screws are made of medical-grade titanium.
Why titanium
Titanium is biocompatible, strong and corrosion resistant, which suits a part that has to hold a small cross-section under daily bite load. Its tolerance of bone is the reason the implant fixture is made of titanium as well; the screw itself sits inside the fixture and does not touch bone.
Titanium has been used in dental implants for decades because it is biocompatible and resists corrosion in the mouth.
How Does the Dental Implant Screw Work
The dental implant screw works using precision engineering and torque mechanics. During implant restoration the steps follow this order.
- The abutment is placed on the implant.
- The implant screw is inserted.
- The screw is tightened using controlled torque.
- The crown is attached.
This creates a secure and stable tooth replacement.
Is the Dental Implant Screw Permanent
In most cases, yes, the implant screw is designed to stay in place for the working life of the restoration. With proper care most screws stay in place for years, and one that loosens or wears can be retightened or replaced.
Regular check-ups support long-term success.
Can an Implant Screw Become Loose
Yes. Screw loosening is the most frequent technical complication of implant single crowns, with a cumulative five-year incidence of 8.8% in a meta-analysis of 46 studies (PubMed 23062124). The usual triggers are excessive bite force, teeth grinding ( bruxism ) and trauma.
At Mosdent, digital planning and precision torque techniques reduce this risk.
Dental Implant Screw Stability and Care
Implant screw stability and care cover looseness signs and routine protection.
Signs of a Loose Implant Screw
Patients may notice crown movement, a clicking sensation, bite discomfort or gum irritation.
If you experience these symptoms, a dentist should check the implant immediately.
How Is an Implant Screw Tightened
Dentists use a torque wrench to tighten implant screws with precise force. Correct torque supports stability and longevity and reduces the risk of loosening.
Dental Implant Screw vs Implant Fixture
Many patients confuse these parts.
| Implant Fixture | Implant Screw |
|---|---|
| Replaces tooth root | Holds abutment in place |
| Inside bone | Inside implant |
| Permanent | Stays in place, replaceable if damaged |
Both are essential for implant success.
Do All Dental Implants Use Screws
Most two-piece implant systems, where the fixture and abutment are separate parts, use an abutment screw. One-piece implants, made with the abutment and fixture as a single body, have no separate abutment screw.
Implant screws are used across these types of implant restorations.
- Single implant crown
- Implant bridge
- Full mouth implants
In two-piece systems, each of these relies on the implant screw for stability.
How Long Does an Implant Screw Last
The screw has no fixed lifespan; it is checked at routine visits. In a review of single implant crowns, 95.2% of implants survived 10 years (PubMed 23062124).
Regular maintenance is essential.
How to Protect Your Implant Screw
These habits protect the implant and the screw joint.
- Brush twice daily
- Use floss or water flosser
- Avoid teeth grinding
- Visit dentist regularly
The implant screw is hidden inside the implant and crown, so it cannot be seen in the mouth, and its condition is checked at least once a year during dental check-ups. A screw is replaced only if it is damaged or has loosened.
Why Choose Mosdent for Dental Implants
Mosdent offers digital implant planning, advanced technology, experienced implant surgeons and international patient services.
The dental implant screw may be small, but it plays a large role in implant success. With proper care and regular check-ups at Mosdent, dental implants can serve for many years, though how long varies from person to person. Learn more about dental implants.
Let's plan the right treatment together.
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