Dental Crowns in Türkiye: Zirconia and E.max

When a crown is the right answer

Crowns are indicated when a tooth has lost so much structure that a filling would flex and fracture it: after root canal treatment on a back tooth, after a large old amalgam has cracked the surrounding walls, on a heavily worn tooth, or on an implant abutment. They are not the right answer for a purely cosmetic change to an otherwise sound front tooth — that is what veneers and bonding are for, and they remove a fraction of the tooth structure.

Materials, and where each belongs

Monolithic zirconia is milled from a single block and is exceptionally strong. It is the material of choice for molars, for patients who grind, and for long-span bridges. Modern multi-layer zirconia blocks have improved translucency considerably, though they remain slightly more opaque than glass ceramics.

Lithium disilicate (e.max) offers the best optical properties for front teeth: light passes through it much as it does through enamel. It is strong enough for single crowns in the aesthetic zone and for premolars, and it bonds adhesively to the remaining tooth, which reinforces it.

Layered zirconia combines a zirconia core with hand-applied porcelain on the visible surface, giving the strength of one and the aesthetics of the other. It requires an experienced ceramist and is our usual recommendation for front crowns on discoloured or post-treated teeth.

We no longer place porcelain-fused-to-metal crowns as a default. They work, but the metal collar eventually shows as a grey line at the gum margin, and no amount of ceramic hides it.

Why margins decide longevity

The junction between crown and tooth is where failure begins. A margin that stands even fractionally proud, or leaves a microscopic gap, collects plaque that neither brush nor floss reaches — and decay under a crown is often discovered late, when the tooth beneath is beyond saving. Digital impressions with an intraoral scanner avoid the distortion that impression material can introduce, and milling to that scan produces fits measured in tens of microns. We check every margin under magnification before cementation, and we would rather remake a crown than seat a compromised one.

The bite is not an afterthought

A crown that is a fraction of a millimetre high changes how the whole jaw closes. Patients notice it as tenderness, as a tooth that feels "tall", sometimes as jaw joint discomfort weeks later. Occlusion is checked in centric position and in every excursive movement before you leave, and adjusted until the contacts are even. It takes a few extra minutes and prevents a great deal of trouble.

What to expect during treatment

The tooth is prepared under local anaesthetic, scanned digitally, and fitted with a temporary crown made from the design. The laboratory mills and finishes the definitive crown over several days. At the fitting appointment we assess contact points, margins, shade and bite, then cement or adhesively bond depending on the material. Mild sensitivity to cold for a week or two afterwards is normal and settles.

Care

A crowned tooth still has a living root and a gum margin, so it can still decay at the edge and still develop gum disease. Brushing, daily interdental cleaning and six-monthly professional care are exactly as important as they were before. If you grind, wear the night guard: fracturing a zirconia crown takes real force, but the tooth underneath is not made of zirconia.