Fixed Prosthodontics
Fixed dental prosthodontics (Fixed Prosthodontics), which in common terms is called a “crown” or a “dental bridge,” is a branch of dentistry that deals with the reconstruction of damaged teeth or the replacement of missing teeth in a way that they are non‑movable.
Nature of Fixed Prosthesis
Unlike old artificial teeth (removable prostheses) that the patient can take out of the mouth, fixed prostheses are placed by the dentist using very strong adhesives (dental cement) on the existing natural teeth or implant bases. These prostheses have the greatest similarity to natural teeth in terms of function and sensation.
Main Types of Fixed Prostheses
1. Dental Crown (Crown)
This is the most common type of fixed prosthesis that is used as a single unit.
Application: When the root of the tooth is healthy but its crown has been weakened due to root canal treatment, severe fracture, or extensive decay.
Function: The crown is placed like a strong cap over the tooth and covers it from all directions to prevent the tooth from breaking under chewing forces.
2. Fixed Bridge (Dental Bridge)
It is used when one or several teeth have been completely lost and there are healthy teeth on both sides of the empty space.
Application: Replacing missing teeth without the need for implant surgery.
Function: The dentist prepares the two teeth adjacent to the empty space so that they act as “abutments.” Then a series of connected crowns is made that covers the side teeth and the replacement tooth (which is suspended) is placed in the middle.
3. Inlay & Onlay (Inlay & Onlay)
These are known as “partial crowns” or laboratory restorations and are an intermediate option between a simple filling and a full crown.
Application: When the tooth damage is greater than what can be restored with filling materials (composite), but it is still not extensive enough to require full preparation and a crown.
Function: A piece made of ceramic or zirconia is fabricated in the laboratory exactly according to the cavity of the tooth and is bonded to the tooth like a piece of a puzzle. This method preserves the maximum amount of healthy tooth structure.
Implant‑Supported Fixed Prosthesis (Implant‑Supported)
This is the most modern type of fixed prosthesis that does not rely on natural teeth.
Application: Replacing one or several teeth without damaging the adjacent teeth.
Function: The crown or bridge is screwed or cemented directly onto a titanium base (implant) that is placed in the jawbone
Short Comparison of Materials (Prosthesis Materials):
1. Zirconia – The Gold Standard
This material is currently the most popular choice in modern dentistry.
Advantages: Extremely high strength (similar to metal), complete biocompatibility with the gums, and a color very similar to natural teeth.
Best option for: Both back teeth (due to chewing strength) and front teeth (due to aesthetics).
Note: Unlike older crowns, its margins never become dark.
2. All‑Ceramic (All‑Ceramic / E‑Max) – The Peak of Aesthetics
These crowns are made of reinforced porcelain and transmit light exactly like tooth enamel.
Advantages: The closest possible similarity to natural teeth; distinguishing it from a real tooth is almost impossible.
Best option for: Front teeth that are located in the “smile line,” where translucency is most important.
Note: They are slightly more fragile than zirconia and are not recommended for the most posterior teeth with high chewing pressure.
3. Porcelain‑Fused‑to‑Metal (PFM) – Economical and Classic
These prostheses have a metal framework with a layer of porcelain fired on top of it.
Advantages: More affordable price and a long history of use in dentistry.
Disadvantages: Because of the metal layer underneath, they do not have the translucency of natural teeth, and after some time a dark gray line may appear at the gum margin.
Best option for: Back teeth when budget limitations are a consideration.
Feature | Zirconia | All‑Ceramic (E‑Max) | Metal‑Ceramic (PFM) |
Internal Structure | Zirconium oxide (a metal‑like ceramic) | Glass‑ceramic (Lithium disilicate) | Metal alloy (Cobalt, Chromium or Gold) |
Compressive Strength | Very High (over 1000 MPa) | Moderate (around 400 MPa) | High (due to metal framework) |
Translucency & Aesthetics | Excellent (very natural) | Exceptional (highest similarity to enamel) | Moderate (more opaque due to metal layer) |
Gum Compatibility | Excellent (does not darken gums) | Excellent (no sensitivity) | May cause a gray shadow at the margin |
Area of Use | Posterior teeth & long bridges | Anterior teeth & veneers | Posterior molars |
Fit Accuracy | Very high (CAD/CAM manufacturing) | Very high | Good (manual casting method) |
The Golden & Key Tip for Final Choice
The “Front for Beauty, Back for Strength” Rule:
If your dentist offers you a choice between these options, remember this formula: For anterior (front) teeth within the smile line, the priority is E-Max, as it transmits light just like a natural tooth enamel. However, for posterior (back) teeth that endure heavy chewing pressure, or when a long bridge is required, Zirconia is the ultimate choice due to its stunning fracture resistance.
We are here to help you make the best decision. To receive a free professional consultation and book an appointment with Dr. Hesam Nazari, please use the following methods:
Contact the Clinic (Landline): ☎️ +987153341322
Mobile & Urgent Consultation: 📱 +989031408680
Online Request: Fill out the form below, and our experts will contact you as soon as possible. 📩
Our commitment is to provide safe and painless services for your healthy smile. 🌿
Table of Contents
“All dental services, from general to cosmetic and specialized, are provided at this clinic. Below you can see some of the services.”
Aligner
(Invisible orthodontics)
Dental implant
(Dental implantation)
Dental laminate
(Cosmetic crown)
Composite veneer
(Composite crown)
Teeth bleaching
(Teeth whitening)
Overdenture
(Implant-supported prosthesis)
Dentures
(Replacement tooth)
Dental restoration
(Dental reconstruction)
These are some of our main services.
To view the full list of services and details of each treatment, visit the Services page
Key Advantages of Fixed Prostheses
1. Complete Restoration of Chewing Power (Function)
One of the biggest challenges of tooth loss or severely damaged teeth is the inability to chew food properly.
Direct force transmission: Because a fixed prosthesis is firmly attached to the tooth root or an implant base, chewing forces are transferred vertically to the jawbone. This means you can eat even the hardest foods (such as meat or firm fruits) without worrying about tooth movement.
Improved digestion: Proper chewing is the first stage of digestion. By restoring chewing ability, extra burden is removed from the digestive system.
2. Permanent Stability (Stability)
Unlike removable dentures that are held in place with temporary adhesives or metal clasps:
No slipping: A fixed prosthesis has no movement in the mouth. This allows the patient to completely forget the “fear of teeth falling out” while speaking or laughing.
Soft tissue comfort: Because these prostheses do not move on the gums, there are no gum sores or inflammations that are commonly seen with removable dentures.
3. Preservation of Facial Structure and Speech
Missing teeth or bulky removable dentures can negatively affect facial shape and pronunciation.
Clear speech: Many sounds (such as “s”, “f”, and “t”) are produced when the tongue touches the back of the front teeth. A fixed prosthesis restores the exact edges of the teeth and returns speech to a completely natural state.
Prevention of lip collapse: Teeth act as support for facial muscles. A fixed prosthesis restores lost volume and prevents sunken cheeks and an aged facial appearance.
4. Prevention of Tooth Shifting and Misalignment
Teeth naturally tend to move toward empty spaces.
Maintaining dental alignment: When a tooth is lost, adjacent teeth tilt toward the gap and the opposing teeth may move into the empty space (overeruption). A fixed prosthesis (especially a bridge) fills this space and locks the entire dental arch in its proper position.
5. High Durability and Long‑Term Cost Efficiency
Although the initial cost of a fixed prosthesis (such as a zirconia crown) is higher than simple restorations or dentures:
Longevity: With proper oral hygiene, these prostheses can remain in the mouth for 15 to 20 years without loss of quality.
Resistance to decay: The prosthesis material (ceramic or zirconia) does not decay. This means the underlying tooth is protected from bacterial acid attacks (provided the crown margins are precise).
Summary at a glance
A fixed prosthesis is not “false teeth”; it is “having teeth again.” This method becomes so well integrated with the body that after a short time the patient perceives it as part of their own body and regains the same level of confidence.
Vital Care for Long‑Term Durability (Over 20 Years)
1. Hygiene of the Critical Margin (The Margin)
The junction where the crown meets the tooth (where the crown edge reaches the gum) is the most vulnerable area. If microbial plaque accumulates at this margin, decay can begin underneath the crown and may remain unnoticed until the crown becomes loose or severe pain appears.
Brushing technique: Hold the toothbrush at a 45‑degree angle toward the gum line so the bristles can reach slightly under the gum edge.
Using a Water Flosser: Oral irrigators that clean with pressurized water are the best tools for cleaning under bridges and around crown margins where a toothbrush cannot reach.
2. Special Strategy for Bridges (Super Floss)
If you have a bridge, it means there is a suspended tooth connected to adjacent teeth.
Super Floss: These flosses have a stiffened end that works like a needle, allowing you to pass the floss underneath the suspended tooth.
Importance: Food accumulation under the bridge can cause gum recession and bad breath. If the gum under the bridge recedes, the longevity of the entire prosthesis is compromised.
3. Management of Destructive Forces (Stress Management)
Ceramic materials are strong but can be fragile under sudden impact forces.
Protection against bruxism: Many people unconsciously grind their teeth during sleep. This pressure can chip ceramic edges or loosen the crown cement. For patients with fixed prostheses, using a custom Night Guard is essential.
Avoid using teeth as tools: Never use crowns to open knots, cut threads, or crack nuts such as pistachios. Point pressure can create microscopic cracks in the ceramic that may lead to complete fracture months later.
4. Diet and Chemical Health of the Mouth
Hidden sugars: Frequent consumption of carbonated drinks and sugary foods makes the oral environment more acidic. Acid can gradually dissolve the cement under the crown (wash‑out).
Dry mouth: Saliva plays a protective role in the mouth. If you experience dry mouth due to medications or illness, the risk of decay under the crown increases significantly. In such cases, using artificial saliva products is recommended.
5. Periodic Maintenance (Like a Car!)
Your crown requires regular professional evaluation.
6‑month checkups: The dentist uses specialized instruments to evaluate the tightness of the crown and check for leakage around its margins.
Annual radiography: The tooth beneath the crown should be examined yearly with X‑rays to ensure there is no secondary decay.
💬 Free Initial Consultation & Examination 🩺
✨ For a free specialized consultation and to book an appointment with Dr. Hesam Nazari, please contact us through the following methods:
📱 Mobile Consultation: +989031408680
☎️ Clinic Phone: +987153341322
📍 Address: Iran, Fars, Fasa, Shahzadeh Ghasem Square, opposite Asieh High School, Dr. Hesam Nazari Clinic
🕐 Working Hours: Saturday to Wednesday (8:00 AM – 22:00)
Thursday, Friday & Public Holidays: Closed
📩 Please fill out the form below for online booking, and we will contact you as soon as possible.
Why Entrust Your Smile to Dr. Hesam Nazari?
Option 1: Comprehensive and Trust‑Building (Suitable for the Main Website Page)
Choosing a dentist goes beyond a simple treatment; it is a choice for your health and self‑confidence. At Dr. Hesam Nazari’s clinic, we have combined a commitment to quality with the art of modern dentistry.
Microscopic Precision in Execution: The use of the latest materials in the world (such as zirconia and advanced ceramics) ensures that your treatments are not only durable but also aesthetically indistinguishable from natural teeth.
Technology in the Service of Comfort: By utilizing modern equipment, we provide you with a fast and pain‑free treatment experience so that the fear of dentistry becomes a distant memory.
Personalized Treatment Plan: Here, every smile is a unique work of art. Dr. Hesam Nazari carefully examines your jaw and facial structure and recommends the best treatment path with complete honesty.
Option 2: Short and Slogan‑Like (Suitable for Social Media or the About Us Section)
Dr. Hesam Nazari’s clinic; a place where expertise finds meaning through your smile.
We know that you are looking for durability. That is why in our clinic:
1.Quality is our red line; we use the best global brands.
2.The art and experience of Dr. Hesam Nazari bring elegance to your fixed prostheses and cosmetic treatments.
3.Hygiene and sterilization are carried out according to the strictest international standards.
With us, be treated once and for all.
Option 3: Friendly and Patient‑Centered (Conversational Tone)
Are you searching for the smile you have always dreamed of?
Many of our patients, before coming to Dr. Hesam Nazari’s clinic, were worried that their crowns might look artificial or that their treatments might not last. But we believe that our best advertisement is the satisfied smile patients have when they leave the clinic. Dr. Hesam Nazari, with patience and care, stays by your side from the first consultation to the final stage of bonding the prosthesis to ensure that the result is exactly what brings dignity and beauty to your face.
Fixed dental prosthetics (crowns and bridges) are not merely a dental restoration; they are a connection between modern technology and the biology of your body. The ultimate goal of this treatment at Dr. Hesam Nazari’s clinic is to restore balance to the chewing system, preserve the jawbone, and enhance your self‑confidence in social interactions.
Conclusion:Summary of What to Consider…
Quality is not accidental: A crown with a lifespan of over 20 years is the result of smart material selection (such as zirconia) and microscopic precision during tooth preparation and impression‑taking stages.
Shared responsibility: The dentist creates the best possible prosthesis for you, but maintaining it—especially at the sensitive gum line—is your responsibility through proper daily oral hygiene.
Preventing chain‑reaction damage: Replacing a missing tooth with a fixed prosthesis prevents the movement of adjacent teeth and helps avoid more complex problems in the jaw joint.
Final message:
“A successful fixed prosthesis is one that, after some time, you forget is not your own tooth. We are here to help turn this natural and long‑lasting experience into reality. Your investment today in high‑quality prostheses guarantees your digestive health and the beauty of your smile for decades to come.
All dental services — from A to Z — are provided in this clinic. Below, you can see a selection of the main treatments.
Dental Bonding
(Dental Bonding)
Dental Bridge
(Dental Bridge)
Dental Onlay
(Dental Coating)
Dental Crown
(Protective Coating)
Intraoral Scanner
(3D Scanning)
Periodontics
(Gum Treatment)
Orthodontics
(Jaw and Teeth Correction)
Dental Composite
(Composite Restoration)
You can see a selection of our clinic services here; for the full list, please visit the Services page.
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