Inlay - Onlay - Overlay Aesthetic Dental Fillings

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Inlay, Onlay, and Overlay Restorations are indirect restorations frequently used in modern dentistry. They are important for preserving the tooth structure, providing an aesthetic appearance, and offering long-lasting solutions. These restorations are made of durable materials that match the natural color of the tooth and offer a long-lasting solution by preserving the tooth structure. Which one to use is determined depending on the size and location of the damage to your tooth. Generally, inlays are preferred for small caries, while onlays and overlays are preferred for larger caries or fractures.

In the Treatment Process; the condition of the tooth is evaluated and the appropriate type of restoration is determined. Carious or damaged tissue is cleaned. Precise measurements are taken from the tooth and sent to the laboratory. A temporary filling is applied until the laboratory process is completed. The prepared restoration is glued to the tooth and the process is completed by polishing. Inlay, onlay, and overlay restorations offer modern solutions that preserve the aesthetic and functional properties of the tooth. Which method to use is determined according to the patient’s dental condition, chewing function, and aesthetic expectations.

Inlay Restorations

It is a type of filling placed in the pits (fissures) and indentations on the chewing surface of the tooth. Only carious or damaged parts are treated by preserving the tubercles (protrusions) of the tooth. It is applied in the restoration of small or medium-sized caries, replacement of old amalgam fillings, treatment of broken teeth, and in cases requiring a minimally invasive approach. Porcelain or composite materials are prepared to match the natural tooth color. It fits the tooth perfectly with precise laboratory procedures. It is more durable than direct fillings. Prevents unnecessary tissue loss. However, it is more costly than other filling types. The procedure is completed in two sessions. (impression taking and placement).

Onlay Restorations

Onlay restorations cover a wider area than inlays. It covers a larger part of the chewing surface of the tooth and can restore more structures. It is applied in larger caries and broken teeth, strengthening weak and cracked teeth, and in cases where the tooth needs to be restored without the need for a crown. It provides a strong chewing function while giving the tooth a natural appearance. It requires less tooth reduction compared to crowns. The material durability is high. Porcelain or ceramic materials are in harmony with the tooth tissues. It better adapts to the natural shape and function of the tooth. However, it requires more preparation and cost compared to inlay restorations. It cannot be completed in a single session due to the laboratory stage.

Overlay Restorations

Overlay restorations are similar to onlays, but cover a wider area of the tooth, sometimes even the entire tooth. It is used to restore most of the chewing surface. It is a minimally invasive solution preferred as an alternative to crown restorations.

It is applied in teeth worn due to bruxism (teeth grinding), strengthening of teeth weakened after root canal treatment, repair of deep caries or treatment of large fractures, and restoring aesthetics and function in patients in need of prosthetic rehabilitation.

There is less tissue loss compared to crowns. Ceramic and porcelain materials are prepared in the appearance of natural teeth and are long-lasting. It preserves the remaining healthy tissue of the tooth. It provides both aesthetic and functional restoration. However, it is costly. Preparation time and laboratory stages take time. Requires sensitive bonding techniques.

Materials Used;

Porcelain (Ceramic): The closest material to the natural tooth color. Provides high durability and aesthetics. Biocompatible with gums and does not stain.
Composite Resin: It is more affordable. Offers moderate durability and aesthetics. Suitable for small restorations.
Gold Alloy: It is the most durable material. It is used in areas with low aesthetic expectations (for example, in the posterior teeth).

Advantages;

Aesthetics: They match the natural color of the tooth, so they give a more natural result in terms of appearance.
Durability: The materials used are durable, so they are long-lasting.
Preserves tooth tissue: They require minimal removal of tooth tissue, so the natural structure of the tooth is preserved.
Hygienic: Thanks to their smooth surfaces, they reduce plaque accumulation, thus reducing the risk of tooth decay.