Porcelain Crown & Bridge

An abutment tooth is a supporting tooth that carries the load of the bridge; your dentist prepares these teeth to take a crown. The pontic is the section that replaces the missing tooth — it has no root underneath it. The pontic only touches the gum surface; it isn't embedded in the bone. A classic three-unit bridge has two abutments and one pontic. This distinction shapes the whole logic of the treatment: chewing force is transferred from the pontic to the abutment teeth.

Your dentist first examines the extent of the gap, the condition of the abutment teeth's roots, and gum health, using X-rays and an intraoral examination. At the second appointment, under local anaesthetic, the abutment teeth are reduced by a set amount and an impression is taken; in practices working digitally, an intraoral scanner handles this step. A temporary bridge is fitted the same day, so you're not left with a visible gap while you wait. In the lab, the technician builds the framework, layers the porcelain and matches the shade. At the final appointment, your dentist checks the fit, verifies the bite, and cements the bridge permanently in place.

A straightforward bridge is usually completed in three to five appointments. If the abutment teeth don't need any preliminary work, the whole process typically spans one to two weeks. The timeline extends if gum treatment, root canal treatment, or healing after an extraction is needed first. When a bridge follows an extraction, a few weeks' wait is built in to let the gum settle.

Below a certain thickness, porcelain loses its strength, so your dentist removes a measured amount of structure from the outer surface of the abutment tooth to make room for the restoration. This reduction covers every surface of the tooth and takes away a significant portion of the enamel. The enamel and dentine removed this way don't grow back — the process is irreversible. Reducing an otherwise sound, filling-free tooth for the sake of a bridge is the most debated aspect of this treatment, which is why dentists tend to favour a bridge when the abutment tooth already has a large restoration in place.

Irreversible loss of tooth structure in the abutment teeth is the main downside of this treatment. The tooth's nerve can become irritated after reduction, and root canal treatment may be needed further down the line — which can mean removing the bridge to carry it out. If plaque builds up between the crown margin and the gum, decay can start in the abutment tooth; because the bridge is a single unit, a problem at just one abutment affects the whole restoration. Food trapped under the pontic can cause redness, bleeding and bad odour in the gum. Bone volume in the toothless ridge under the pontic can reduce over time, and this can leave a visible gap between the pontic and the gum. That gap can be noticeable aesthetically and can make food trapping worse. Cracks or fractures can develop in the porcelain surface; biting hard objects and night-time clenching both increase this risk. If the cement loosens over time, the bridge can become mobile, and decay can develop underneath without being noticed.

Ordinary floss won't pass underneath a bridge, because the units are joined together. For this area, you need stiff-ended super floss, a floss threader, or an interdental brush. You thread the floss horizontally under the pontic and work it against the surface of each abutment tooth to clear away plaque. A water flosser helps remove food debris, but it doesn't replace mechanical cleaning. If this doesn't become a daily habit, the bridge won't stay in the mouth as long.

With crowns and bridges placed on teeth that still have a live nerve, mild sensitivity to hot and cold is common in the first few days. In most cases, this settles within a few days to two weeks. Sticking to softer foods for the first week while you get used to the new bridge improves comfort. Throbbing pain, pain that gets worse at night, or pain that sharpens when you bite down points to something different and needs a check-up.

Your dentist makes the temporary bridge from acrylic and fixes it with a weak cement; its job is to maintain your appearance, protect the abutment teeth from outside factors, and shape the gum. During this stage, sticky sweets, chewing gum and hard, crunchy foods can dislodge it. Floss should be slid out sideways from beside the temporary bridge rather than pulled up through it. If the temporary bridge comes off, keep the piece and call the clinic — an exposed abutment tooth becomes sensitive quickly, and the neighbouring teeth can start to drift out of position.

How long a bridge stays in the mouth isn't down to any single factor. The root health of the abutment teeth, how well the crown margins fit the gum, day-to-day plaque control, and keeping up with regular check-ups all have a direct effect on this. In patients who clench or grind at night, wearing a protective night guard reduces the risk of cracks in the porcelain, while habits such as cracking hard nuts or chewing ice shorten its lifespan. In patients who keep up with clinical follow-up, fixed bridges can function well for many years — even so, every mouth carries a different load profile.