Fernando Giovanella
Reviewed and approved by Dr. Fernando Giovanella, CRO-SC 8237 · Lattes CVHow this guide is made →
For anyone about to get an implant who has heard the word “guided”

Is guided implant surgery worth it? The case for and against

It depends on the case, and Dr. Fernando Giovanella, who places implants in Blumenau, Brazil, starts with what the guide does: it brings the implant closer to the spot planned on the CBCT scan3,9, with an average deviation of about 1.2 mm where it enters the bone and 1.4 mm at the implant's tip in the studies — small, but not zero1,2. In the comparisons with freehand placement, it didn't make the implant last longer3,4,5; on pain, whether the gum is opened matters more than the guide3,10; and in a simple case, its advantage is small4,9,10.

One thing the guide does · with strong evidence
Is it more accurate? By how much? It places the implant closer to where it was planned on the CBCT scan3,9, with an average deviation of about 1.2 mm at the entry into the bone and 1.4 mm at the implant tip in the studies — small, but not zero1,2.
Three it doesn’t do the way people often say
Does the implant last longer? In comparisons with freehand surgery, it did not make the implant last longer3,4,5.
Does it hurt less? For pain, whether the gum is opened matters more than the guide3,10.
Who the guide changes little for In a simple case, its advantage is small4,9,10.

Notice the shape of that answer: one thing the guide does, with strong proof, and three it doesn't do the way people usually tell it. The word “guided” reaches patients carrying more promises than the studies support, and I'd rather show you each one with the number in hand, the case for and the case against in the same place.

Before the numbers, the bare minimum on how it works.

How does guided implant surgery work? Is it worth it?

In guided surgery, as Dr. Fernando Giovanella does it in Blumenau, Brazil, the decision comes before the drill. First comes a CBCT scan, a 3D X-ray of the jaw, and a digital scan of your mouth. Together they become a 3D model, and on it the implant is designed starting from the tooth that will be made11,12. That design becomes a printed guide, which fits in your mouth and leads the drill along the planned path.

Whether it's worth it depends on what you expect from it. Each expectation has its own answer, and not all of them are yes.

Is an implant placed with a guide more accurate? By how much?

It is more accurate, yes — that's the part with the strongest proof — and Dr. Fernando Giovanella, in Blumenau, Brazil, explains the measure before the number. Deviation is the difference between where the implant was designed on the screen and where it ended up in the bone: the distance at the entry point and at the tip, and the difference in angle.

The deviation, in three measures
Entry
Tip
Angle
With a guide · average deviation in a 2018 meta-analysis of 20 studies and 2,238 implants1. Under each average, the statistical margin. With a guide, at the entry: 1.2 mmstatistical margin: 1.04 to 1.44 With a guide, at the tip: 1.4 mmstatistical margin: 1.28 to 1.58 With a guide, in the angle: 3.5°statistical margin: 3.0 to 3.96 Compared with freehand · how much closer to the plan the guide placed the implant, on average, in the randomized trials that compared the two approaches — high-quality evidence3. In favor of the guide, at the entry: 0.65 mm In favor of the guide, at the tip: 1.13 mm In favor of the guide, in the angle: 4.41°
An average is not a promise. In a 2014 review that pooled studies in patients and in the lab, the largest deviation reached 4.5 mm at the entry and 7.1 mm at the tip13 — the worst case, with data from that time.
Sketch not to scale: the deviation is enlarged so it shows in the drawing. The numbers are for the techniques studied, not for this clinic.

With a guide, a 2018 meta-analysis of 20 studies and 2,238 implants found an average deviation of about 1.2 mm at the entry point, 1.4 mm at the tip and 3.5 degrees in angle; another, from 2024, with 53 studies and 4,504 implants, reached almost the same numbers1,2. To give you an idea, 1.4 mm is roughly the thickness of two credit cards stacked. Even with those averages, the 2018 international consensus of the ITI, an association of implant professionals, asks that an implant planned with a guide stay at least 2 mm away from critical anatomical structures1,11.

Without a guide, the implant is placed freehand: the plan may well have been made on the CBCT, but what takes the drill there is the surgeon's hand. In the randomized trials that compared the two, pooled in a 2020 meta-analysis, the guide put the implant, on average, about 0.7 mm closer to the plan at the entry point, 1.1 mm at the tip and 4 degrees in angle, and the authors rated that evidence as high quality3,9.

Now, the other side. An average is not a promise: in a 2014 review that pooled studies in patients and in the lab, the largest deviation reached 4.5 mm at the entry point and 7.1 mm at the tip13 — the worst case, with data from that time.

The guide shrinks the margin of error. It doesn't erase it. And the numbers above are from the techniques studied, not mine.

But accuracy is a means, not an end. The question that matters to someone about to get an implant comes next: does it last longer?

Does an implant placed with a guide last longer?

In the studies, no, and here Dr. Fernando Giovanella, in Blumenau, Brazil, drops the “it depends”: for as long as patients were followed, the implant placed with a guide lasted neither longer nor shorter. In the randomized trials, pooled in meta-analyses from 2020 and 2026, more than 98% of implants were still in place at one year, with and without a guide, and a 2026 review of reviews found no difference3,4,5.

Two caveats. The first is the strength of the proof: the authors themselves rate this evidence from very low to moderate quality3,4,5. The second is time: most of these studies followed patients for about a year, and long comparisons between guided and freehand are still rare13,14. Long-term data is missing, and what exists doesn't show the guided implant lasting less.

Lasting, in the studies, doesn't change. Pain is another conversation, and the answer depends on a detail that usually gets left out.

Does guided surgery hurt less?

Only when the guide lets the implant go in without opening the gum, and even then Dr. Fernando Giovanella, in Blumenau, Brazil, shows you what the studies found: a little less pain, of uncertain size and with low certainty.

In a 2023 review of five randomized trials, with meta-analysis, guided surgery without opening the gum, compared with surgery where the gum was opened, brought on average a little less pain in the days that followed; the certainty of that evidence is low, and swelling showed no clear difference6,7,8.

When the studies separate the incision from the guide, the difference doesn't even become clear: with the gum opened in both groups, guided or freehand, the trials showed at most a trend in favor of the guide3,10.

Pain follows the incision more than the guide. In some cases, the guide is what makes it possible to skip the incision. In others, it isn't.

Is guided surgery done without an incision?

Not always: Dr. Fernando Giovanella, in Blumenau, Brazil, keeps the two words apart because they talk about different things. “Guided” is how the drill gets to its place; “no incision” is whether the gum is opened or not. The guide can be used with or without opening the gum, and several of the studies that measured pain used the guide with the gum opened7,10,15.

Operating without opening it depends, among other things, on there being enough firm gum around the implant, and the international consensus asks that this be assessed before guided surgery is planned12. No incision is not a rule of the technique. It's a decision for each case, made before the surgery.

The same goes for the promise that most often comes attached to the word “guided”.

Can I get a tooth the same day with guided surgery?

Sometimes you can, with or without a guide, and Dr. Fernando Giovanella, in Blumenau, Brazil, points to what decides it: how firm the implant is at the moment of surgery, not the guide.

In two trials that compared guided and freehand, both groups had temporary teeth fixed in place right after surgery, and the implants did about equally well7,8. For temporary teeth to be fixed right away, the implant has to come out of surgery firm, and the studies report changes of plan for lack of firmness in guided surgery too10,13,16.

The guide brings the implant closer to the planned spot. It doesn't decide whether it holds firm. The timing for your case comes out of the planning and the surgery, not out of this page.

Firmness, gum, space: the guide depends on things that aren't in it.

Does guided surgery work for every case?

The consensus sees no contraindication, but there are practical limits — that's the answer Dr. Fernando Giovanella, in Blumenau, Brazil, takes from the studies. The source is the ITI's 2018 international consensus: it treats guided surgery as one more tool in diagnosis, planning and surgery and, looking at pain, cost and complications, sees no contraindication to using it instead of conventional surgery11,12.

The first limit is space. For the drill to pass through the guide, the mouth has to open wide enough. In a 2024 study of 90 people, that opening was there in almost all of them at the front of the mouth, but at the molars in only 30% of older patients, with some implant systems; in a 2020 study of 50 implants, 7, all at molars, had to be placed freehand for that reason17,18.

The other one has already come up: operating without opening the gum depends, among other things, on firm gum around the implant. And there are cases where the guide fits with no trouble at all and, even so, adds little.

Who gains little from guided surgery?

Someone with a simple case, such as an implant with bone to spare, in a spot that's easy to see and reach during surgery: there, the guide's advantage is small, and Dr. Fernando Giovanella, who does guided surgery in Blumenau, Brazil, would rather you heard that from someone who does it.

This comes from recent reviews, which use a broader phrase, “simple cases”, without saying which ones; bone to spare and an easy-to-reach spot are an example, not their list. In simple cases, they say, freehand placement by an experienced surgeon remains reliable, and the choice between the two depends on how complex the case is4,9,10. It's the authors' reading, not a measured result. That reading doesn't say the guide gets in the way in a simple case. It says that there, it adds little.

One question is left, the one the word “guided” seems to answer all by itself.

Is guided surgery safer? What can go wrong?

More accurate, yes; safer, the studies don't let anyone say, and Dr. Fernando Giovanella, in Blumenau, Brazil, won't say it for them. On complications, the reviews disagree. The older ones, from 2009 to 2015, recorded many complications — one of them, from 2014, in 36% of cases, counting surgery and prosthesis together, from a broken guide to a loose prosthesis screw. The more recent ones, which compare with freehand, generally found no clear difference; one, from 2026, found, in a subgroup analysis and with weak evidence, fewer complications around the implant with freehand placement4,5,6,10,13,16,19.

What can happen during surgery is described too. The guide can break or fail to sit firmly in the mouth; in the reports, it was fixed on the spot or the surgeon carried on the conventional way10,13,16. And the plan can change: an implant that doesn't hold firmly enough, a graft that wasn't expected and, without opening the gum, an implant that couldn't be placed as planned — in a 2023 review, in 7% of cases6,13,18.

You have the right to know this beforehand, and to ask whoever is going to operate: if the plan changes on the day, what happens in my case?

And with zygomatic implants, does the same apply?

These numbers can't be carried over to them, and Dr. Fernando Giovanella, who plans and places zygomatic implants in Blumenau, Brazil, doesn't do that math: the studies on this page are about regular implants. A zygomatic implant is a different implant, a long one that reaches up into the cheekbone, with a different surgery and different risks, and it has a page of its own, Zygomatic implant: what it is and who it's for (or not).

And if you're reading this because someone told you there isn't enough bone for a regular implant, the page for that question goes through every option, from the smallest step to the largest: Not enough bone for implants? Your options, honestly. On both pages, the rule is the same as here: the numbers are from the techniques studied, not mine.

I want to know whether guided surgery makes a difference in my case. Where do I start?

With an assessment by Dr. Fernando Giovanella, in Blumenau, Brazil, which starts with a message to the clinic's WhatsApp. If you already have a CBCT scan, send it.

The person who assesses you is the one who plans and operates: me. In the assessment, the question on this page becomes the question of your case: does the guide add a lot, or a little? The answer comes from the examination and from your CBCT. And if the answer is “a little”, that's what I'll tell you.

No commitment and no pressure: it starts with a message and ends with a clear plan for your case. Send your scan and you get a written reading of it, from the surgeon who would operate — preliminary until I examine you in person. The message includes your consent to how the clinic handles health data — read it first.

What patients still ask me

Is all guided surgery the same?

No, and Dr. Fernando Giovanella, in Blumenau, Brazil, tells two kinds apart: the guide that leads every drill and the one that leads only the first. Guiding the whole sequence is more accurate2,3,20. In a small randomized trial from 2018, with 32 people, in the back of the upper jaw, the implant's tip ended up, on average, 0.97 mm from the plan with the full guide, 1.43 mm when only the first drill was guided and 2.11 mm freehand21. It's worth asking your surgeon which of the two they use.

Does the guide replace the surgeon's experience?

No: the guide leads the drill, but the one responsible for the surgery is the person operating, and with Dr. Fernando Giovanella, in Blumenau, Brazil, the one who plans is the one who operates. Reviews record unexpected events during guided surgery, and the international consensus asks for experience and training from whoever uses it11,16,22. If the plan changes on the day, the next step is decided by a person, not by the printed part.

I don't have a single tooth left in my jaw. Does guided surgery work the same way?

It can be used, but not with the same accuracy — that's what Dr. Fernando Giovanella, in Blumenau, Brazil, takes from the studies: accuracy is higher when there are still teeth in the mouth to support the guide than in a jaw with no teeth at all1,11. If, besides the teeth, bone is missing too, the options, from the smallest step to the largest, are in Not enough bone for implants.

Does an implant placed with a guide look better?

The studies haven't shown that yet, and Dr. Fernando Giovanella, in Blumenau, Brazil, won't claim what they haven't shown. More accuracy in position hasn't yet turned, in the studies, into a proven gain for the patient, such as the implant looking better6,10. Lasting longer is a different matter: the studies have already asked that question, and the answer, over the time patients were followed, was “no”3,4,5. The question about looks is still open. And a question with no answer is not the same as an answer of “no”.

How much does guided surgery cost, and why is there no price here?

There's no price here because it depends on your case, and Dr. Fernando Giovanella, in Blumenau, Brazil, only gets to it after seeing your CBCT: how many implants, where, and whether the prosthesis comes with them. Before that, a number would be a guess. What can be said without a number: guided surgery has steps that freehand doesn't need, the design of the guide on the computer and its printing. The price comes with the plan, never before it.

How treatment at the clinic works →

Read next

References

  1. Tahmaseb A, Wu V, Wismeijer D, Coucke W, Evans C. The accuracy of static computer-aided implant surgery: A systematic review and meta-analysis. Clin Oral Implants Res. 2018;29 Suppl 16:416–435. doi:10.1111/clr.13346 · PMID 30328191. https://pubmed.ncbi.nlm.nih.gov/30328191/ — accessed 13 October 2026.
  2. Khaohoen A, Powcharoen W, Sornsuwan T, Chaijareenont P, Rungsiyakull C, Rungsiyakull P. Accuracy of implant placement with computer-aided static, dynamic, and robot-assisted surgery: a systematic review and meta-analysis of clinical trials. BMC Oral Health. 2024;24(1):359. doi:10.1186/s12903-024-04033-y · PMID 38509530. https://pubmed.ncbi.nlm.nih.gov/38509530/ — accessed 13 October 2026.
  3. Tattan M, Chambrone L, González-Martín O, Avila-Ortiz G. Static computer-aided, partially guided, and free-handed implant placement: A systematic review and meta-analysis of randomized controlled trials. Clin Oral Implants Res. 2020;31(10):889–916. doi:10.1111/clr.13635 · PMID 32654230. https://pubmed.ncbi.nlm.nih.gov/32654230/ — accessed 13 October 2026.
  4. Tomar S, Chaudhary P, Ganguly A. Comparing the clinical outcomes of guided and freehand dental implant surgery: An umbrella review of systematic reviews and meta-analyses. J Prosthet Dent. 2026;135(5):e53–e59. doi:10.1016/j.prosdent.2025.10.039 · PMID 41206337. https://pubmed.ncbi.nlm.nih.gov/41206337/ — accessed 13 October 2026.
  5. Shirani M, Emami M. Comparison Between Computer-Assisted and Freehand Dental Implant Placement: A Systematic Review and Meta-analysis. Int J Oral Maxillofac Implants. 2026;41(3):359–370. doi:10.11607/jomi.11349 · PMID 40879619. https://pubmed.ncbi.nlm.nih.gov/40879619/ — accessed 13 October 2026.
  6. Romandini M, Ruales-Carrera E, Sadilina S, Hämmerle CHF, Sanz M. Minimal invasiveness at dental implant placement: A systematic review with meta-analyses on flapless fully guided surgery. Periodontol 2000. 2023;91(1):89–112. doi:10.1111/prd.12440 · PMID 35906928. https://pubmed.ncbi.nlm.nih.gov/35906928/ — accessed 13 October 2026.
  7. Pozzi A, Tallarico M, Marchetti M, Scarfò B, Esposito M. Computer-guided versus free-hand placement of immediately loaded dental implants: 1-year post-loading results of a multicentre randomised controlled trial. Eur J Oral Implantol. 2014;7(3):229–42. PMID 25237668. https://pubmed.ncbi.nlm.nih.gov/25237668/ — accessed 13 October 2026.
  8. Tallarico M, Esposito M, Xhanari E, Caneva M, Meloni SM. Computer-guided vs freehand placement of immediately loaded dental implants: 5-year postloading results of a randomised controlled trial. Eur J Oral Implantol. 2018;11(2):203–213. PMID 29806667. https://pubmed.ncbi.nlm.nih.gov/29806667/ — accessed 13 October 2026.
  9. Khaohoen A, Powcharoen W, Yoda N, Rungsiyakull C, Rungsiyakull P. Accuracy in dental implant placement: A systematic review and meta-analysis comparing computer-assisted (static, dynamic, robotics) and noncomputer-assisted (freehand, conventional guide) approaches. J Prosthet Dent. 2025;134(1):91.e1–91.e25. doi:10.1016/j.prosdent.2025.03.038 · PMID 40221370. https://pubmed.ncbi.nlm.nih.gov/40221370/ — accessed 13 October 2026.
  10. Pimkhaokham A, Jiaranuchart S, Kaboosaya B, Arunjaroensuk S, Subbalekha K, Mattheos N. Can computer-assisted implant surgery improve clinical outcomes and reduce the frequency and intensity of complications in implant dentistry? A critical review. Periodontol 2000. 2022;90(1):197–223. doi:10.1111/prd.12458 · PMID 35924457. https://pubmed.ncbi.nlm.nih.gov/35924457/ — accessed 13 October 2026.
  11. ITI Academy — Consensus Database. "Accuracy of Static Computer-Aided Implant Surgery" (Tahmaseb A, Wismeijer D, Evans C; 6th ITI Consensus Conference, 2018), statements 1 to 4 and clinical recommendations 1 to 7. https://academy.iti.org/academy/consensus-database/consensus-statement/-/consensus/accuracy-of-static-computer-aided-implant-surgery/1820 — accessed 13 October 2026.
  12. ITI Academy — Consensus Database. "Static Computer-Aided Implant Surgery (s-CAIS) Analysing Patient-Reported Outcome Measures (PROMs), Economics, and Complications" (Joda T, Derksen WDC, Wittneben JG, Kühl S; 6th ITI Consensus Conference, 2018), recommendations 1 to 3. https://academy.iti.org/academy/consensus-database/consensus-statement/-/consensus/static-computer-aided-implant-surgery-s-cais-analysing-patient-reported-outcome-measures-proms-economics-and-complications/1817 — accessed 13 October 2026.
  13. Tahmaseb A, Wismeijer D, Coucke W, Derksen W. Computer technology applications in surgical implant dentistry: a systematic review. Int J Oral Maxillofac Implants. 2014;29 Suppl:25–42. doi:10.11607/jomi.2014suppl.g1.2 · PMID 24660188. https://pubmed.ncbi.nlm.nih.gov/24660188/ — accessed 13 October 2026.
  14. Laleman I, Bernard L, Vercruyssen M, Jacobs R, Bornstein MM, Quirynen M. Guided Implant Surgery in the Edentulous Maxilla: A Systematic Review. Int J Oral Maxillofac Implants. 2016;31 Suppl:s103–17. doi:10.11607/jomi.16suppl.g3 · PMID 27228244. https://pubmed.ncbi.nlm.nih.gov/27228244/ — accessed 13 October 2026.
  15. D'haese J, Ackhurst J, Wismeijer D, De Bruyn H, Tahmaseb A. Current state of the art of computer-guided implant surgery. Periodontol 2000. 2017;73(1):121–133. doi:10.1111/prd.12175 · PMID 28000275. https://pubmed.ncbi.nlm.nih.gov/28000275/ — accessed 13 October 2026.
  16. Moraschini V, Velloso G, Luz D, Barboza EP. Implant survival rates, marginal bone level changes, and complications in full-mouth rehabilitation with flapless computer-guided surgery: a systematic review and meta-analysis. Int J Oral Maxillofac Surg. 2015;44(7):892–901. doi:10.1016/j.ijom.2015.02.013 · PMID 25790741. https://pubmed.ncbi.nlm.nih.gov/25790741/ — accessed 13 October 2026.
  17. Gargallo-Albiol J, Ortega-Martínez J, Salomó-Coll O, López-Boado AP, Paternostro-Betancourt D, Hernández-Alfaro F. Mouth opening limitation and influence of age and surgical location for static fully guided dental implant placement: an observational, cross-sectional clinical study. Int J Oral Maxillofac Surg. 2024;53(6):526–532. doi:10.1016/j.ijom.2024.01.008 · PMID 38302300. https://pubmed.ncbi.nlm.nih.gov/38302300/ — accessed 13 October 2026.
  18. Lin CC, Wu CZ, Huang MS, Huang CF, Cheng HC, Wang DP. Fully Digital Workflow for Planning Static Guided Implant Surgery: A Prospective Accuracy Study. J Clin Med. 2020;9(4):980. doi:10.3390/jcm9040980 · PMID 32244735. https://pubmed.ncbi.nlm.nih.gov/32244735/ — accessed 13 October 2026.
  19. Schneider D, Marquardt P, Zwahlen M, Jung RE. A systematic review on the accuracy and the clinical outcome of computer-guided template-based implant dentistry. Clin Oral Implants Res. 2009;20 Suppl 4:73–86. doi:10.1111/j.1600-0501.2009.01788.x · PMID 19663953. https://pubmed.ncbi.nlm.nih.gov/19663953/ — accessed 13 October 2026.
  20. Zhou W, Liu Z, Song L, Kuo CL, Shafer DM. Clinical Factors Affecting the Accuracy of Guided Implant Surgery — A Systematic Review and Meta-analysis. J Evid Based Dent Pract. 2018;18(1):28–40. doi:10.1016/j.jebdp.2017.07.007 · PMID 29478680. https://pubmed.ncbi.nlm.nih.gov/29478680/ — accessed 13 October 2026.
  21. Younes F, Cosyn J, De Bruyckere T, Cleymaet R, Bouckaert E, Eghbali A. A randomized controlled study on the accuracy of free-handed, pilot-drill guided and fully guided implant surgery in partially edentulous patients. J Clin Periodontol. 2018;45(6):721–732. doi:10.1111/jcpe.12897 · PMID 29608793. https://pubmed.ncbi.nlm.nih.gov/29608793/ — accessed 13 October 2026.
  22. Hultin M, Svensson KG, Trulsson M. Clinical advantages of computer-guided implant placement: a systematic review. Clin Oral Implants Res. 2012;23 Suppl 6:124–35. doi:10.1111/j.1600-0501.2012.02545.x · PMID 23062137. https://pubmed.ncbi.nlm.nih.gov/23062137/ — accessed 13 October 2026.

About this guide

Reviewed and approved by Dr. Fernando Giovanella, CRO-SC 8237 · Updated October 2026 · Next review: April 2027

Where the facts come from. Every number that comes from a study has its source listed under References, with the date it was checked. The numbers are from the techniques studied, not from Dr. Giovanella. Explanations without a number describe how guided surgery is usually done; they were reviewed by him and are not a promise about any specific case. What this guide does not publish: prices, patient names, before-and-after images without consent, star ratings, or comparisons with other surgeons or countries.

How to check the registration. The public registries of the Santa Catarina Regional Dental Council and the Federal Council of Dentistry list the dentists registered in Brazil. Search “Fernando Giovanella”, Santa Catarina.

Conflicts of interest. Dr. Giovanella is a paid research-and-development consultant to an implant manufacturer and is the designer of surgical instruments with patent applications pending in Brazil. The full declaration is on the editorial policy page.

Found a mistake? Send it to the clinic on WhatsApp (the same button above) or by e-mail at atendimento@fernandogiovanella.com. You'll have an answer within five business days; corrections are made and dated on the page.

How this guide is written, checked and kept up to date

Send your CBCTa scan, not a photoWhatsApp