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The decision to use fiber reinforcement is based on a thorough assessment of the patient’s biomechanical, periodontal, and restorative status. At Liv Hospital, diagnosis involves more than just identifying a loose or broken tooth; it consists of calculating the forces that will be placed on the restoration and ensuring that the biological foundation is strong enough to support the intervention. The evaluation process determines whether a fiber application will provide a long-term solution or if it is merely a transitional step in a more complex treatment plan.
Before splinting teeth, the supporting tissues must be rigorously evaluated.
Mobility Grading: We assess the degree of mobility (Miller Classification). Grade I and II mobility are ideal candidates for splinting. Grade III (vertical) mobility often has a poor prognosis and may not benefit from splinting.
Bone Level Analysis: Radiographs are used to determine the crown-to-root ratio. There must be sufficient bone support on the abutment teeth to support the mobile teeth. Splinting two weak teeth together results in both failing together.
Inflammation Status: Active inflammation (bleeding on probing) must be controlled before fiber application. Bonding to inflamed, bleeding gums is impossible and leads to failure.
Occlusal Trauma: We evaluate if the mobility is caused by infection or by a “high bite” (primary occlusal trauma). If it is the latter, a bite adjustment is performed before or during splinting.
For endodontic fiber posts, the amount of remaining tooth structure is the critical diagnostic factor.
Ferrule Measurement: We measure the height of the healthy tooth structure above the gum line. A minimum of 1.5 to 2mm of sound tooth structure (ferrule) is required to encircle the tooth. Without this, even a fiber post will not prevent fracture.
Canal Configuration: We evaluate the root canal shape. Fiber posts are ideal for round or oval canals but may not fit well in ribbon-shaped or extensive canals without customization.
Root Width: Radiographs are checked to ensure the root is thick enough to accommodate a post without being weakened. The post should not exceed one-third of the root diameter.
Apical Seal: The quality of the root canal filling is verified. A post should never be placed in a tooth with a failing root canal or an apical infection.
For fiber-reinforced bridges and splints, the way the teeth bite together dictates the design.
Interocclusal Space: We check the clearance between the upper and lower teeth. There must be enough room (approx. 1-2mm) to place the fiber and composite without interfering with the bite. If the bite is too tight, a channel may need to be prepared in the teeth.
Guidance Patterns: We analyze the patient’s jaw movements. If the lower teeth strike the proposed splint area heavily during lateral movements, the risk of debonding is high.
Parafunctional Habits: Patients with severe bruxism (grinding) generate forces that may exceed the strength of composite materials. These patients require careful evaluation and likely a protective night guard.
Overbite/Overjet: Deep bites present a challenge for maxillary anterior splints, as the lower teeth often impinge on the palatal surface where the fiber is placed.
We evaluate the load the restoration will face.
Span Length: For fiber bridges, the length of the missing tooth space is measured. Fiber bridges are typically successful for single-tooth replacement. Spans of two or more pontics have a high risk of flexing and fracture.
Abutment Stability: The teeth supporting a bridge must be stable. Using a mobile tooth to support a pontic is contraindicated.
Caries Risk: Patients with high caries rates are poor candidates for extensive splinting, as the splint can make cleaning difficult. A caries risk assessment guides the decision.
Material Selection: Based on the stress analysis, we decide between polyethylene fibers (better for stress-breaking and mobility) or glass fibers (better for rigidity and spans).
Since fibers are often used in the aesthetic zone, visual parameters are assessed.
Translucency Needs: We evaluate the translucency of the natural teeth. Glass fibers are more translucent and easier to hide than some opaque polyethylene fibers.
Bulk and Contour: We assess if adding the fiber layer will make the teeth feel too bulky to the tongue or affect speech.
Color Match: The shade of the composite resin used to cover the fiber is selected to match the underlying tooth, ensuring the splint is invisible.
Smile Line: We check how much of the tooth is visible during smiling. If the fiber bridge junction is visible, special layering techniques are required to hide the reinforcement.
Before placing a post, the root’s internal status is assessed.
Gutta-Percha Level: We determine how much root filling material needs to be removed. At least 4-5mm of gutta-percha must remain at the tip of the root to maintain the apical seal.
Undercuts: We check for internal undercuts in the pulp chamber that might interfere with the seating of a pre-fabricated post.
Sclerosed Canals: Calcified or very narrow canals may pose a risk of perforation during post space preparation and should be carefully evaluated on CBCT.
Restorability: Ultimately, we decide if the tooth is worth saving. If the fracture extends below the bone or the tooth is split, a post is contraindicated, and extraction is the correct diagnosis.
Liv Hospital Ulus
Asst. Prof. MD. Begüm Aslan
Dentistry
Liv Hospital Ulus
Dt. Aydan Gürcan
Dentistry
Liv Hospital Ulus
Dt. Melisa Albayrak
Dentistry
Liv Hospital Ulus
Spec. Dt. Ecem Aytuna Yardım
Dentistry
Liv Hospital Vadistanbul
DDS. Mustafa Yılmaz
Dentistry
Liv Hospital Vadistanbul
Spec. Dt. Begüm Kayalak
Dentistry
Liv Hospital Vadistanbul
Spec. MD. Hilal Yüksel Aksakal
Dentistry
Liv Hospital Topkapı
Assoc. Prof. MD. Elif Dilara Arslan
Orthodontics
Liv Hospital Topkapı
Assoc. Prof. MD. Emrah Dilaver
Dentistry
Liv Hospital Topkapı
Dt. Helin Yazgan
Dentistry
Liv Hospital Ankara
Dt. Elif Narin Topgül
Oral and Dental Health
Liv Hospital Gaziantep
DDS. Doğan Tanrıverdi
Oral and Dental Health
Liv Hospital Gaziantep
Dt. Şilan Özel
Dentistry
Send us all your questions or requests, and our expert team will assist you.
Usually, no; fiber splints are adhesive procedures that bond to the tooth surface, though sometimes a shallow groove is made to keep the fiber flush with the tooth surface.
We use digital X-rays to see the level of the bone surrounding the roots; if the bone loss is too severe, the tooth may be too weak even for a splint.
Yes, one of the main diagnostic advantages is that if the conditions are right, we can fabricate and bond the fiber bridge in a single appointment.
It is the band of healthy natural tooth structure that hugs the filling or crown; having enough ferrule is the most critical factor for the success of a fiber post.
No, unlike metal posts, which can cast a grey shadow, fiber posts are white or translucent, helping the final all-ceramic crown look completely natural.
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