Implant or Bridge: When the Alternative Makes Sense

I love implants.

They are an excellent system: reliable, efficient, and conservative toward the neighbouring teeth.

They have solved a great many problems.

They not only give teeth back to people who have lost them entirely, or who no longer have maintainable teeth (a group that has grown far too wide, in truth), but they let us restore single gaps without touching the adjacent teeth.

Yet, at times, there are alternatives that must be considered.

And I say this as an implantologist.

I say it after thirty years of implant surgery, with thousands of fixtures placed. I say it precisely because I believe in implants. But I believe even more in clinical honesty.

The right question

When you lose a tooth, the question is not “which solution is more modern?” — it is “which solution is best for your mouth, your health, your life?”

And the answer changes. Always.

When the bridge beats the implant

Look at the teeth next to the gap. Are they intact? Then an implant makes sense. But if those teeth already have old crowns that need redoing, deep decay or root canals — a bridge might be an excellent alternative.

Why sacrifice healthy tissue when there is already compromised tissue to restore? In these cases the bridge solves two problems with one solution. The implant solves only one, leaving the others unresolved.

The numbers in the literature are very interesting. The systematic review by Pjetursson and colleagues, published in Clinical Oral Implants Research in 2007 and updated in 2012, analysed decades of clinical studies: the estimated 10-year survival of conventional bridges on natural teeth sits around 89%, comparable to that of implant-supported prostheses.

But there is a figure that is rarely quoted: after five years, 38.7% of patients with implant-supported fixed prostheses experienced some kind of complication (not of the implants, but of the prosthesis!).

To those in the field it is clear where these complications come from: they are the recent materials the industry has handed us, with easy promises of longevity that are not always kept.

And these complications concern almost exclusively full-arch restorations, where the industry has indulged in every kind of gimmick. I have explored this theme in my article on custom regeneration versus All-on-X.

A bridge requires no surgery, no months of osseointegration, none of the possible implant complications. But a bridge can fail too.

Personally I am no fan of bridges. But I always try to analyse each case to understand when they can be a sound and reliable alternative.

Ultimately, in a case with 1-2 missing units and adjacent teeth that already carry crowns or need covering yet are still solid, I will also consider a bridge and discuss it with the patient.

Long-span bridges on natural teeth, on the other hand, I will avoid; I consider them unreliable. Implants are decidedly better.

There is a detail worth stating honestly, because it complicates the picture a little. When the abutment teeth are already non-vital, the prognosis of the bridge drops slightly. The systematic review by Hawthan, Larsson and Chrcanovic (Journal of Prosthodontics, 2024), which pooled 26 clinical studies, quantifies it: at five years a fixed prosthesis on vital abutments survives in 84.9% of cases, against 81.3% when at least one abutment is non-vital. Single crowns on vital teeth, for comparison, reach 98.3%. Fewer than four points of difference on bridges, but the message is precise: a tooth that has already had root canal treatment bears the load a touch less well. That is not a reason to give up on the bridge when the abutments are solid. It is a reason to look at them closely, one by one, before deciding.

The third way: the adhesive bridge

There is an even more conservative route. The adhesive bridge — the Maryland — replaces a tooth by bonding to the enamel of the neighbouring teeth with a wing, without preparing them for crowns. When you lose an incisor young, with the bone still growing and an implant contraindicated, it is often the best choice.

Over the years, the numbers have matured. The systematic review with meta-analysis by Alqutaibi and colleagues (Journal of Esthetic and Restorative Dentistry, 2024), across twelve clinical studies, shows that single-wing cantilever anterior adhesive bridges give fewer complications than double-wing designs, and that zirconia or glass-infiltrated alumina versions hold up successfully for ten to fifteen years. In the anterior region it is a reliable and, above all, reversible solution: you have not burned any bridges, in every sense.

At the back, the story is more fragile. The systematic review by Thu and colleagues at the University of Hong Kong (Journal of Prosthodontic Research, 2026), across fifteen studies, estimates the survival of posterior adhesive bridges at 82.8% at five years and 68.5% at ten. The chewing load of molars is another matter. Back there, if the tooth must be replaced and has to last, the implant remains the more predictable choice over the long term.

How to decide, really

The right choice depends on factors that only a careful examination can assess: the state of the adjacent teeth, the quality and quantity of bone, general health, biological — not chronological — age, realistic expectations, the medications taken.

Among these factors is money too, and it would be hypocritical to pretend otherwise. A cost-effectiveness analysis by Tekpınar and Yiğit (Value in Health Regional Issues, 2024) used a Markov model to simulate twenty years in the life of an implant-supported crown versus a bridge on natural teeth. The implant yields more in terms of quality-adjusted prosthesis-years, but costs more than double. It is not a technical verdict — it is a reminder: the solution that looks superior on paper is not automatically the right one for every person. I have written elsewhere about the real cost of replacing a tooth.

No algorithm can replace this clinical reasoning. Only an honest evaluation of the overall situation, without prejudice toward any of the three options.

Every solution has its ideal patient. The clinician’s task is to find the right match.

References

Pjetursson BE, Brägger U, Lang NP, Zwahlen M. Comparison of survival and complication rates of tooth-supported fixed dental prostheses (FDPs) and implant-supported FDPs and single crowns (SCs). Clin Oral Implants Res. 2007;18 Suppl 3:97-113. doi:10.1111/j.1600-0501.2007.01439.x. PMID: 17594374

Pjetursson BE, Thoma D, Jung R, Zwahlen M, Zembic A. A systematic review of the survival and complication rates of implant-supported fixed dental prostheses (FDPs) after a mean observation period of at least 5 years. Clin Oral Implants Res. 2012;23 Suppl 6:22-38. doi:10.1111/j.1600-0501.2012.02546.x. PMID: 23062125

Hawthan M, Larsson C, Chrcanovic BR. Survival of fixed prosthetic restorations on vital and nonvital teeth: A systematic review. J Prosthodont. 2024;33(2):110-122. doi:10.1111/jopr.13735. PMID: 37455556

Alqutaibi AY, Alghauli MA, Almuzaini SA, et al. Failure and complication rates of different materials, designs, and bonding techniques of ceramic cantilever resin-bonded fixed dental prostheses for restoring missing anterior teeth: A systematic review and meta-analysis. J Esthet Restor Dent. 2024;36(10):1396-1411. doi:10.1111/jerd.13238. PMID: 38623053

Thu KM, Ling Z, Li KY, Botelho MG, Lam WYH. Posterior resin bonded fixed partial denture: A systematic review of five-year clinical outcomes. J Prosthodont Res. 2026. doi:10.2186/jpr.JPR_D_25_00301. PMID: 42161568

Tekpınar L, Yiğit V. Cost-Effectiveness Analysis of Implant-Supported Single Crown and Tooth-Supported Fixed Dental Prostheses in Türkiye. Value Health Reg Issues. 2024;42:100979. doi:10.1016/j.vhri.2024.01.001. PMID: 38340673