A gold dental crown is made through a multi-step process that begins with reshaping the tooth in the dentist’s chair and ends with a precisely cast metal restoration cemented into place. The entire process typically takes two appointments spread over two to three weeks, with the bulk of the craftsmanship happening in a dental laboratory between visits. Here’s how each stage works, from tooth preparation to the final fit.
Preparing the Tooth
Before anything can be built, the dentist needs to create space for the crown by reducing the tooth’s height and circumference. The goal is to remove enough structure so the gold shell fits over the tooth without sitting too high or too wide, while leaving enough healthy tooth behind for the crown to grip onto. A minimum of 2 millimeters of sound, parallel tooth wall must remain after shaping to give the crown adequate hold and resistance to being pulled off.
The dentist shaves down the chewing surface (typically 1 to 1.5 mm for gold, less than for porcelain) and tapers the sides slightly so the crown can slide on and off during fitting. A smooth ledge called a finish line is carved around the base of the tooth, right at or just below the gumline, giving the lab a precise boundary to build to. Because gold can be cast thinner than most ceramic materials, less of the natural tooth needs to be removed, which is one of gold’s key advantages.
Once shaping is complete, the dentist takes an impression of the prepared tooth and the opposing teeth. This can be done with a traditional putty-like material or, increasingly, with an intraoral digital scanner. A temporary crown made of acrylic or composite protects the prepared tooth while the permanent crown is fabricated.
Choosing the Gold Alloy
Dental “gold” crowns are not pure gold. They’re made from alloys that combine gold with other metals for strength and durability. The American Dental Association classifies these alloys into two main categories. High noble alloys contain at least 60% noble metals (gold plus platinum group metals), with gold making up at least 40% of the total. Noble alloys contain at least 25% noble metals but may have less gold. The rest of the alloy is typically a mix of silver, copper, palladium, and small amounts of zinc or tin.
Higher gold content generally means better biocompatibility and corrosion resistance, but it also means a softer alloy. For back teeth that absorb heavy chewing forces, labs often use alloys with added palladium or platinum to increase hardness. The alloy choice also affects cost. A single gold crown typically ranges from $800 to $2,500 or more, depending heavily on the gold content, the complexity of the case, and the region.
The Lost-Wax Casting Process
The traditional method for making a gold crown is called lost-wax casting, a technique that has been used in dentistry for over a century. It produces crowns with exceptional fit and detail. The process unfolds in a specific sequence at the dental lab.
First, the lab technician pours the dentist’s impression in a hard plaster-like material to create an exact replica of the prepared tooth, called a die. Working under magnification, the technician sculpts a wax pattern directly on this die, building up the crown’s shape layer by layer. Every cusp, groove, and contact point with neighboring teeth is carefully carved into the wax. This is painstaking handwork that determines how well the finished crown will bite, fit against adjacent teeth, and seal at the margins.
Once the wax pattern is perfected, a small wax rod called a sprue is attached to it. This rod creates a channel through which molten metal will eventually flow. The wax pattern and sprue are then mounted on a base and placed inside a metal ring, which is filled with a heat-resistant plaster-like material called investment. This encases the wax completely.
The invested ring goes into a high-temperature oven, where the wax melts and burns away entirely, leaving behind a perfectly shaped hollow cavity inside the hardened investment. This is where the technique gets its name: the wax is “lost.” Molten gold alloy, heated to over 1,000°C, is then forced into the cavity using centrifugal force or a vacuum. After the metal cools, the investment is broken away to reveal the raw gold crown.
The technician then trims off the sprue, polishes the crown, and checks its fit on the original die. The interior surface is adjusted to ensure it seats completely, and the outer surface is polished to a high shine or given a satin finish depending on preference.
Digital Milling as an Alternative
Some labs now use CAD/CAM technology to fabricate gold crowns. Instead of hand-sculpting wax, a technician designs the crown digitally using software, and a milling machine carves it from a block of gold alloy. This approach can dramatically reduce turnaround time by eliminating the multiple manual steps of waxing, investing, burning out, and casting.
Digital milling works well for most crown shapes, though it has limitations with very thin or delicate edges. The flowable nature of molten metal in traditional casting can fill extremely fine spaces that a milling bur cannot replicate. For straightforward back-tooth crowns, however, the digital workflow produces results comparable to traditional casting and is becoming more common.
Fitting and Cementing the Crown
At the second appointment, the dentist removes the temporary crown, cleans the prepared tooth, and tries in the gold crown. The fit is checked in three key ways: how well the crown seats on the tooth, how it contacts the neighboring teeth, and how it meets the opposing teeth when you bite down. Adjustments are made chairside with polishing instruments until the bite feels natural.
Gold crowns are cemented using one of several types of dental cement. Glass ionomer cement is one of the most common choices because it bonds well to metal, releases fluoride to protect the underlying tooth, and allows the crown to be carefully removed later if needed. Zinc phosphate cement has been used for decades and remains a reliable option. Resin cements provide the strongest bond but make future removal more difficult. The dentist selects the cement based on how much tooth structure remains and how retentive the preparation is. A crown with tall, well-shaped walls may only need a conventional cement, while a shorter or more tapered preparation may benefit from the extra grip of a resin cement.
Once cemented, excess material is cleaned away, the bite is checked one final time, and the crown is complete.
Why Gold Crowns Last So Long
Gold alloys wear at a rate similar to natural tooth enamel, which means they don’t grind down the opposing tooth the way some harder ceramics can. Gold is also slightly flexible rather than brittle, so it absorbs chewing forces without cracking. This combination of properties makes gold particularly well-suited for molars, where bite forces are strongest.
A retrospective study at a dental school clinic found that gold partial crowns and inlays had an overall 10-year survival rate of about 86%. Many dentists report gold crowns lasting 20 to 30 years or longer in patients who maintain good oral hygiene. The tight marginal seal that lost-wax casting achieves helps prevent bacteria from seeping under the crown, which is the most common reason any crown eventually fails.
When Gold Isn’t the Right Choice
Gold crowns have two main drawbacks. The obvious one is appearance. On front teeth or premolars that show when you smile, most people prefer tooth-colored porcelain or zirconia. Gold is most commonly placed on molars where visibility isn’t a concern.
The less obvious issue is allergy. While rare, some people develop a sensitivity to metals in gold alloys. In documented cases, gold dental restorations have triggered oral lichen planus, a condition that causes white, lacy patches or painful sores on the gums and inner cheeks. When the gold restoration was identified as the cause and replaced with a non-metal alternative, symptoms improved. If you have a known metal allergy, mention it before any crown work begins.
Cost is also a factor. Because the price of gold fluctuates with commodity markets, gold crowns tend to be more expensive than porcelain or zirconia options, though the longer lifespan can offset the higher upfront cost over time.