Dental Bridge — How It Works, Benefits & Recovery — Procedure Guide, Recovery & Risks | MyMedicPlus

A dental bridge is a fixed prosthetic appliance that replaces one or more missing teeth by anchoring artificial teeth (pontics) to adjacent natural teeth (abutments) using dental crowns cemented onto the abutment teeth. The pontic spans the gap left by the missing tooth, restoring the dental arch's function, aesthetics, and structural integrity. Three main types exist: traditional bridges (crowns on both abutment teeth flanking the gap); cantilever bridges (one abutment only, for posterior gaps with a single adjacent tooth); and Maryland (resin-bonded) bridges (metal or zirconia wings bonded to the back of adjacent teeth without crown preparation, preserving more tooth structure). Bridges are made from porcelain-fused-to-metal (PFM), full zirconia, or all-ceramic (e-max) materials. Dental bridges have been used in dentistry for over a century and remain one of the most commonly placed prosthetic restorations worldwide. In the United Kingdom, dental bridges account for approximately 15% of all fixed prosthetic tooth replacements, with dental implants accounting for the remainder of permanently fixed restorations. The average three-unit bridge (two crowns and one pontic) requires approximately 1.5–2 hours of chairside time across two appointments and costs between £500 and £2,000 in the private sector depending on material choice and laboratory fees. NHS dental bridges (Band 3 treatment, approximately £300) use porcelain-fused-to-metal construction. Full-ceramic zirconia bridges fabricated using CAD/CAM (computer-aided design/manufacturing) milling technology offer superior aesthetics and strength compared to traditional PFM bridges.

Dental bridges are suitable for patients with one or more missing teeth who have structurally sound adjacent teeth capable of supporting the bridge load, adequate bone density, and good oral hygiene. Bridges are particularly appropriate when adjacent teeth already require crowns for structural reasons (large existing restorations or caries), providing functional justification for tooth preparation. They are preferred over removable partial dentures in patients who want a fixed solution without implant surgery. Contraindications include poor adjacent tooth quality or periapical pathology, bruxism (heavy grinding) not controlled with a night guard, poor periodontal status, and insufficient bone support in the abutment teeth. Implant-supported crowns preserve jawbone better and are the preferred long-term option when adjacent teeth are healthy. Patients must be committed to meticulous oral hygiene to maintain bridge longevity.

At the first appointment (under local anaesthetic), abutment teeth are prepared by removing approximately 1–2 mm of enamel and dentine from all surfaces to create room for the crown wall thickness. Digital or physical impressions capture the prepared teeth and opposing bite. A temporary acrylic bridge is fabricated and cemented to protect the prepared teeth during the 2–3 week laboratory fabrication period. At the second appointment, the permanent bridge (porcelain, zirconia, or PFM) is trial-fitted for occlusion, aesthetics, and marginal fit before permanent cementation with glass ionomer or resin cement. The bite is carefully checked and adjusted. Digital impressions (CEREC, iTero) enable same-day bridge fabrication in some practices using in-office milling systems. Before permanent bridge cementation, the dental laboratory fabricates the restoration on stone models poured from the impression, checking the marginal fit, contact points, and occlusal anatomy to within 50 microns. The dentist trial-fits the bridge, evaluates each contact point with dental floss, assesses the occlusal bite with articulating paper, and makes any necessary adjustments by carefully grinding the occlusal surface with a fine diamond bur before final polishing. Permanent cementation uses a resin-modified glass ionomer or dual-cure resin cement depending on the bridge material: zirconia bridges require adhesive bonding with resin cement (Panavia, RelyX) as they are insoluble in saliva and require a micromechanical or chemical bond; PFM bridges can be cemented with conventional glass ionomer. Excess cement is carefully removed from the gingival margins with a probe and floss before the cement fully sets.

Dental bridges restore chewing function, speech clarity, and aesthetic appearance almost immediately after cementation. They prevent neighbouring teeth from drifting into the gap (causing malocclusion and bite problems) and prevent the opposing tooth from over-erupting. Modern full-zirconia and e-max bridges provide excellent aesthetics with natural colour matching and translucency comparable to natural enamel. Well-maintained bridges have a 10–15 year survival rate of 85–95%. Zirconia bridges are highly durable with fracture resistance superior to PFM. Patient satisfaction is consistently high for function and appearance. A bridge is typically more affordable than an implant in the short term and can be placed faster (2–3 weeks vs 3–6 months for implants). Same-day CEREC digital milling enables bridge fabrication in a single appointment at practices with in-house CAD/CAM technology.

The most significant drawback of traditional bridges is irreversible preparation of adjacent healthy teeth, removing enamel that cannot be replaced. Post-preparation hypersensitivity affects 10–15% of patients for 1–4 weeks. Pulpitis (nerve inflammation) requiring root canal treatment occurs in 3–5% of prepared teeth over 10 years. Cement failure or debonding (bridge becoming loose) requires re-cementation. Recurrent decay developing under the crown margins — particularly with poor oral hygiene — can undermine the abutment tooth structure. Biological failure (loss of abutment tooth from decay or periodontal disease) is the most common reason for bridge replacement. Long-term bone resorption continues under the pontic area as the missing tooth root no longer stimulates the alveolar bone. Maryland resin-bonded bridges carry no risk of abutment tooth damage as no preparation is required.

Sensitivity in prepared abutment teeth persists for 1–2 weeks after preparation and usually resolves after cementation of the permanent bridge. A soft diet for the first 3–5 days after bridge cementation allows the cement to fully set. Aggressive biting, sticky or very hard foods (ice, nuts, crusty bread) should be avoided to protect the bridge. Daily cleaning must include passing dental floss or a floss threader under the pontic to remove food debris from beneath the bridge — failure to clean this area leads to gum disease and bone loss. Interdental brushes sized to fit under the pontic are an alternative. Regular dental check-ups every 6 months allow early detection of cement failure, decay, or gum disease before they compromise the bridge.