Dentistry focuses on diagnosing, preventing, and treating conditions of the teeth, gums, and oral structures, supporting oral health and overall well-being.
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The treatment of tooth decay has undergone a paradigm shift in the 21st century, moving from “drill and fill” to “minimally invasive dentistry.” The primary goal is to preserve as much natural tooth structure as possible. Treatment modalities range from non-invasive chemical therapies for early lesions to complex surgical restoration for extensive damage.
The choice of treatment depends on the depth of the decay, the structural integrity of the tooth, and the patient’s caries risk level. Modern biomaterials allow for restorations that not only fill the hole but also release minerals to protect the tooth from future acid attacks.
For early lesions (white spots) that have not physically broken the surface, no drilling is required. The treatment focuses on rebuilding the mineral content. High concentration fluoride varnishes (5% sodium fluoride) are applied professionally.
Additionally, pastes containing Calcium Phosphate (CPP-ACP) or nano hydroxyapatite are prescribed to supply the building blocks for enamel repair. This therapy can reverse the decay process entirely if caught early enough.
Resin infiltration is a microinvasive bridge between prevention and filling. It is used for white spot lesions, particularly between teeth or on front teeth. The dentist etches the surface to open the pores of the decay.
A highly fluid, clear resin is then soaked into the porous lesion, filling the microvoids. This stabilizes the decay, stops the acid progression, and often improves the appearance by making the white spot disappear. No drilling is typically required.
SDF is a liquid antimicrobial medication that can be painted directly onto active decay. The silver kills the bacteria, while the fluoride strengthens the tooth structure. It stops the cavity from growing instantly.
It is a non-invasive option often used for children, elderly patients, or difficult to treat areas. The main side effect is that it turns the decayed area permanently black, so it is mainly used on back teeth or baby teeth.
Sealants are a preventive treatment that can also arrest very early decay in the grooves of teeth. A thin, flowable resin coating is bonded into the deep pits and fissures of molars.
This creates a physical barrier that blocks food and bacteria from entering the groove. If early bacteria are trapped underneath, the sealant cuts off their nutrient supply, effectively stopping the caries process.
When a cavity has broken through to the dentin, a filling is necessary. Modern dentistry relies on composite resin (tooth colored) materials. These materials bond chemically and mechanically to the tooth structure.
Unlike metal fillings that require undercuts (removing healthy teeth to hold the metal in), composites allow for very conservative preparations. The decay is removed, and the resin is layered and cured with a special light to harden it.
The newest generation of filling materials is “bioactive.” These materials, such as glass ionomers or bioactive composites, release fluoride, calcium, and phosphate into the surrounding tooth structure.
They actively fight recurrent decay and help the tooth heal itself at the margin. They are handy for patients with high decay risk or for cavities along the gumline where moisture control is difficult.
When a cavity is too large for a simple filling but not severe enough for a full crown, an inlay or onlay is the treatment of choice. These are custom made puzzle pieces, usually milled from porcelain or cured resin.
They are bonded into the cavity. An onlay covers one or more cusps of the tooth, protecting it from fracture. This is a conservative alternative to a crown, saving the healthy side walls of the tooth.
If a tooth has been severely compromised by extensive decay or large old fillings, a crown (cap) is required. The crown completely encases the tooth, holding it together and preventing it from splitting apart.
Modern crowns are typically made of Zirconia or Lithium Disilicate (E.max), offering immense strength and natural aesthetics without the need for metal substructures.
If a deep cavity reaches the nerve, but the nerve is still alive, and only mildly inflamed, vital pulp therapy can save the tooth from a root canal. This involves removing the decay and placing a biocompatible material (like MTA or Bioceramic) directly over the pulp exposure.
This material stimulates the nerve to build a bridge of reparative dentin, sealing itself off and healing. This maintains the vitality of the tooth.
When bacteria irreversibly infect the pulp (nerve), a root canal is necessary to save the tooth. The dentist removes the infected nerve tissue from the hollow canals inside the roots.
The canals are cleaned, shaped, and sterilized, then filled with a rubber-like material called gutta-percha. This eliminates the infection and pain while allowing the tooth to remain in the jaw.
Modern techniques for removing decay focus on precision. Dentists may use ceramic burs (which only cuts soft decay, not hard enamel) or chemo mechanical agents (gels that soften decay for scraping) to avoid removing healthy tissue.
Dyes can be used to stain only the infected bacteria, ensuring that the dentist removes exactly what is needed and nothing more.
For very deep cavities approaching the nerve, dentists may use a “stepwise” approach. They remove the bulk of the decay but leave a small layer over the nerve to avoid exposing it.
A medicated filling is placed to kill the remaining bacteria and allow the nerve to heal and build a protective wall. Months later, the temporary filling is removed to ensure the decay is arrested before placing the final filling.
Extraction is the last resort when the tooth is non restorable. This occurs when the decay has destroyed so much structure that the tooth cannot hold a filling or crown, or if the infection has fractured the root.
Following extraction, the missing tooth should be replaced (via implant, bridge, or denture) to prevent the shifting of adjacent teeth and maintain chewing function.
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No. Dentists use powerful local anesthetics to numb the tooth and the surrounding area thoroughly. You might feel some pressure or vibration from the instruments, but you should not feel any sharp pain. If you do, the dentist can administer more anesthesia.
Composite resin (white) fillings typically last 7 to 10 years, but they can last much longer with excellent oral hygiene. Their lifespan depends on the size of the filling and the patient’s biting forces.
It is always better to save your natural tooth with a root canal. Natural teeth function better than artificial ones and maintain the jawbone structure. Extraction should be a last resort, as replacing a tooth is often more expensive and complex.
A filling patches a small hole in the tooth. A cap (crown) covers the entire tooth like a helmet. Crowns are used when the cavity is so big that the remaining tooth walls are too weak to support a filling without breaking.
Yes, Silver Diamine Fluoride (SDF) permanently stains the decayed part of the tooth black as it kills the bacteria. It does not stain healthy enamel. Because of the color, it is mainly used on baby teeth or back molars, where aesthetics are less of a concern.
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