Teeth on implants straight away, or after healing? What the trials and reviews found

Why loading time became a research question

When Brånemark's group began treating people with no teeth in 1965, implants were buried under the gum and left alone for months before any teeth were attached (Adell et al., 1981). The reasoning was simple and cautious: bone needs time to grow onto the implant, and movement during that time might stop it happening. Patients wore dentures through the healing period and had a second operation to uncover the implants.

That approach worked, but it was slow and unpleasant for people who had just lost their last teeth. From the 1990s, as implant surfaces became rougher and surgeons learned more about stability, clinicians began fitting teeth sooner. By the early 2000s, full-arch protocols with fixed teeth fitted the same day were being published (Maló et al., 2003). The obvious question followed: does fitting teeth early cost anything in terms of failures?

The words researchers use

Definitions vary slightly between papers. The Cochrane review used these:

Immediate loading

Teeth attached within 1 week of placing the implant

Early loading

Between 1 week and 2 months

Conventional loading

After 2 months; traditionally 3 to 8 months unloaded

These are about when the teeth go on, not when the implant goes in. Putting an implant into a fresh tooth socket on extraction day is called immediate placement, a separate question with its own evidence. See the glossary for short definitions of both.

What the Cochrane review found

The Cochrane Collaboration's review of loading times, updated in 2013, searched for every randomised trial comparing the same implant loaded at different times (Esposito et al., 2013). It identified 45 trials and included 26, with 1,217 participants and 2,120 implants. Follow-up ran from four months to one year.

Across all 26 trials the mean implant failure rate was 2.5%. The authors concluded there was no convincing evidence of a clinically important difference between loading times, and called for larger, better-reported trials.

It is worth reading those risk ratios carefully. The point estimates (1.87 and 1.65) lean towards more failures with immediate loading, but the intervals are wide and cross 1, so the trials cannot rule out no difference or a meaningful one. Only three of the 26 trials were judged at low risk of bias. This is what "no evidence of a difference" usually looks like in implant research: reassuring, not definitive. Our article on the evidence hierarchy explains why that distinction matters.

What the full-arch review found

The Cochrane review mixed single teeth, partial bridges and full arches. A 2014 systematic review focused only on people with no teeth receiving fixed full-arch bridges, and included cohort studies as well as trials because full-arch trials are scarce (Papaspyridakos et al., 2014). It pooled 62 studies with 2,695 patients; 45 studies reported immediate loading, 8 early and 11 conventional.

The estimated one-year implant survival was above 99% for all three protocols, and no difference was found between upper and lower jaws. The authors concluded that, with careful case selection and rough-surface implants, immediate loading gave similar survival and failure rates to early and conventional loading. They also added a caution: many confounding factors affect results with each protocol.

The 30 Ncm detail

One practical finding from that review is that most studies recommended a minimum insertion torque of 30 Ncm for immediate loading (Papaspyridakos et al., 2014). Insertion torque is the twisting force needed to seat the implant, and it is a rough measure of how firmly the bone grips it at the start, called primary stability.

This is why a surgeon cannot always promise fixed teeth on the day before surgery. If an implant seats with low torque because the bone is soft, the safer choice may be to let it heal before loading. In full-arch cases the implants are joined together by the temporary bridge, which spreads the load and is one reason immediate loading works well across a whole arch.

What the evidence does not tell you

Three gaps are worth knowing about.

First, time. Most randomised evidence covers the first year. Long-term comparisons come from cohort studies, such as the ten-year report of four lower-jaw implants loaded immediately, which found cumulative implant success of 94.8% and bridge survival of 99.2% (Maló et al., 2011). That is strong evidence the approach can last, but it is not a head-to-head comparison with waiting.

Second, selection. Trials and cohort studies include people who were judged suitable. If you have very soft bone, uncontrolled diabetes, heavy grinding or smoke heavily, the results may not apply in the same way.

Third, placement on the same day as extractions. Many full-mouth patients have failing teeth removed and implants placed in one session. A separate Cochrane review on implants in fresh sockets found too few good trials to settle whether immediate placement carries a higher failure risk, while noting a suggestion that immediate and immediate-delayed implants might have more failures and complications than delayed ones (Esposito and colleagues, 2010, in the sources). The evidence was described as preliminary and based on small trials.

Questions to ask your surgeon about loading

Because the decision depends on the day, it helps to talk it through before you travel. Useful questions include:

• Do you expect to fit fixed temporary teeth soon after surgery in my case, and what would make you change that plan?
• If an implant is not stable enough, what will I wear while it heals, and how long would that add?
• Will the temporary teeth be joined across the whole arch, and what are they made of?
• What should I eat, and for how long, while the implants integrate?
• When will the final bridge be made, and what checks happen before it is fitted?

Clear answers to these show that the clinic has a plan for both outcomes. For people travelling from far away, such as North America or Australia, it is worth knowing in advance whether a change of plan could affect the length of your stay or the timing of the second visit. Our travel guides cover planning by country.

How this plays out in planning

In practice, most full-arch protocols today aim for fixed temporary teeth soon after surgery when the implants are stable enough, and a final bridge some months later once healing is complete. Our timeline tool shows a typical sequence. The decision on the day depends on the stability of each implant, the bone and the plan for the bridge.

Precious Dental publishes this site. Our clinic plans full-arch cases on a 3D scan and sets out in writing how many implants and which brand. Whether temporary teeth go in straight away is a clinical decision made at surgery, and a responsible surgeon will explain beforehand what happens if the implants are not stable enough on the day.

For more on how bone grows onto implants during this healing period, see our osseointegration explainer.

Common questions

What is the difference between immediate placement and immediate loading?

Immediate placement means putting the implant into the socket on the day a tooth is removed. Immediate loading means attaching teeth to an implant within about a week of placing it. A treatment can involve one, both or neither.

Does immediate loading mean I can eat normally straight away?

No. Even when fixed temporary teeth are fitted on the day, patients are normally told to stick to a soft diet for several weeks while the bone heals. Your dentist will give you specific instructions.

Why are implants sometimes left to heal before teeth are fitted?

If an implant is not firmly held in the bone at surgery, movement during healing can stop bone from growing onto it. In that case waiting is safer. The decision is made on the day, based on how firmly each implant sits.

Is there long-term evidence for immediate loading of full arches?

Several cohort studies report results up to ten years, and reviews have found similar survival to conventional loading. Long-term randomised trials comparing the two in full arches are scarce.

Does my health affect whether immediate loading is suitable?

It can. Bone quality, smoking, diabetes control, grinding and the number of implants all play a part. Our risk factors page summarises the evidence on health factors.

Sources

1. Esposito M, Grusovin MG, Maghaireh H, Worthington HV. Interventions for replacing missing teeth: different times for loading dental implants. Cochrane Database Syst Rev 2013. PMID 23543525
2. Papaspyridakos P, Chen CJ, Chuang SK, Weber HP. Implant loading protocols for edentulous patients with fixed prostheses: a systematic review and meta-analysis. Int J Oral Maxillofac Implants 2014. PMID 24660202
3. Esposito M, Grusovin MG, Polyzos IP, Felice P, Worthington HV. Interventions for replacing missing teeth: dental implants in fresh extraction sockets (immediate, immediate-delayed and delayed implants). Cochrane Database Syst Rev 2010. PMID 20824846
4. Maló P, Rangert B, Nobre M. "All-on-Four" immediate-function concept with Brånemark System implants for completely edentulous mandibles: a retrospective clinical study. Clin Implant Dent Relat Res 2003. PMID 12691645
5. Maló P, de Araújo Nobre M, Lopes A, Moss SM, Molina GJ. A longitudinal study of the survival of All-on-4 implants in the mandible with up to 10 years of follow-up. J Am Dent Assoc 2011. PMID 21357865
6. Adell R, Lekholm U, Rockler B, Brånemark PI. A 15-year study of osseointegrated implants in the treatment of the edentulous jaw. Int J Oral Surg 1981. PMID 6809663

Checked October 2026. Where we give our own view as a clinic, we say so.