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Measured 7 October 2026

Dentists in Lisbon: which clinics ChatGPT and Gemini name

Ask ChatGPT or Gemini about dentists in Lisbon without letting it search the web, and one name keeps coming back: MALO CLINIC Lisboa turned up in 114 of 144 answers. Ask where to get implants for missing teeth, and all 8 of 8 answers sent you there.

Let the models search the web and the list opens up. MALO CLINIC Lisboa dropped to 29 of 96 answers, while Clínica Dentária de Lisboa went from 12 of 144 to 42 of 96. Six clinics that never came up from the models' own memory, ADC Dental Center and International Advanced Dentistry among them, appeared once they looked online. On a tight budget, the answers pointed to ADC Dental Center in 4 of 16 cases and to Oral XXI in 3 of 16.

Place
Lisbon, Portugal
Measured
Questions asked in
English
Models
ChatGPT (GPT-5.6 Luna) and Gemini (Gemini 3.6 Flash)
Answers
240 (4 runs of 60)
Clinics tracked
9

The clinics we tracked

Each cell counts the answers that named the clinic out of the answers in which we tracked it, then the share and the range it would most likely fall in if we asked again (95 %).

Clinic All answers ChatGPT Gemini Without web search With web search
ADC Dental Centeradental.pt 31 of 24013 % · 9–18 % 5 of 1204 % · 2–9 % 26 of 12022 % · 15–30 % 0 of 1440–3 % 31 of 9632 % · 24–42 %
Clínica Dentária de Lisboadentistalisboa.com 54 of 24022 % · 18–28 % 21 of 12018 % · 12–25 % 33 of 12028 % · 20–36 % 12 of 1448 % · 5–14 % 42 of 9644 % · 34–54 %
Clínica Dentária do Marquêsclinicadomarques.pt 10 of 2404 % · 2–8 % 10 of 1208 % · 5–15 % 0 of 1200–3 % 0 of 1440–3 % 10 of 9610 % · 6–18 %
Clínica Dentária São Dentesaodente.pt 15 of 2406 % · 4–10 % 4 of 1203 % · 1–8 % 11 of 1209 % · 5–16 % 0 of 1440–3 % 15 of 9616 % · 10–24 %
International Advanced Dentistryiadlisbon.com 24 of 24010 % · 7–14 % 8 of 1207 % · 3–13 % 16 of 12013 % · 8–21 % 0 of 1440–3 % 24 of 9625 % · 17–34 %
MALO CLINIC Lisboamaloclinics.com 143 of 24060 % · 53–66 % 64 of 12053 % · 44–62 % 79 of 12066 % · 57–74 % 114 of 14479 % · 72–85 % 29 of 9630 % · 22–40 %
Mint Dental Clinicmint.pt 40 of 24017 % · 12–22 % 12 of 12010 % · 6–17 % 28 of 12023 % · 17–32 % 5 of 1444 % · 2–8 % 35 of 9636 % · 28–46 %
Oral XXIoralxxi.pt 8 of 2403 % · 2–6 % 8 of 1207 % · 3–13 % 0 of 1200–3 % 0 of 1440–3 % 8 of 968 % · 4–16 %
Prime Dental Clinicprimedentalclinic.pt 21 of 2409 % · 6–13 % 5 of 1204 % · 2–9 % 16 of 12013 % · 8–21 % 0 of 1440–3 % 21 of 9622 % · 15–31 %

Where the answers disagree

For these clinics the two ranges do not overlap, so the difference is larger than repeated asking would explain.

With and without web search

ChatGPT and Gemini

In the models' words

Lines from the answers, verbatim apart from formatting.

MALO CLINIC Lisboa — Internationally known for implant dentistry and full-arch rehabilitation, including “All-on-4”-type treatments. It can be expensive, so obtain a detailed written plan and an independent second opinion.

ChatGPT (GPT-5.6 Luna), without web search, asked: Which dentists and dental clinics in Lisbon, Portugal would you recommend?

Clínica Dentária do Marquês — listed among Lisbon’s highest-rated practices, with nearly 5.0 across about 893 reviews in a local directory.

ChatGPT (GPT-5.6 Luna), with web search, asked: Which dentists and dental clinics in Lisbon, Portugal are most often recommended for the way they treat people?

Founded by Dr. Pedro Ferreira Lopes, Prime Dental Clinic is a popular aesthetic and rehabilitation center in Portugal. They are known for utilizing modern 3D imaging and digital smile design to deliver quick, natural-looking transformations.

Gemini (Gemini 3.6 Flash), with web search, asked: Give me a top-10 list of the best dentists and dental clinics in Lisbon, Portugal.

Other names in the answers

The models brought these up on their own. We did not track them, so there is no share: the number is how many of the 240 answers mentioned the name. Hospitals, insurers, professional bodies and treatment brands appear here as the models wrote them.

  • CUF 119
  • Ordem dos Médicos Dentistas 114
  • White Clinic 106
  • All-on-4 96
  • Hospital da Luz 89
  • Invisalign 84
  • Médis 73
  • Multicare 71
  • AdvanceCare 55
  • Swiss Dental Services 47
  • Clínica Bexiga 38
  • OralMED 32

The 18 questions

As we asked them. Each line under a question counts its answers and the tracked clinics they named.

Open request for a recommendation

  • What are the best dentists and dental clinics in Lisbon, Portugal?

    16 answers, with and without web search. Named: ADC Dental Center (5 of 16), Clínica Dentária de Lisboa (5 of 16), Clínica Dentária do Marquês (1 of 16), Clínica Dentária São Dente (5 of 16), International Advanced Dentistry (5 of 16), MALO CLINIC Lisboa (12 of 16), Mint Dental Clinic (5 of 16), Prime Dental Clinic (4 of 16).

  • Which dentists and dental clinics in Lisbon, Portugal would you recommend?

    16 answers, with and without web search. Named: ADC Dental Center (3 of 16), Clínica Dentária de Lisboa (3 of 16), Clínica Dentária São Dente (1 of 16), International Advanced Dentistry (2 of 16), MALO CLINIC Lisboa (11 of 16), Mint Dental Clinic (3 of 16), Prime Dental Clinic (2 of 16).

Request for a ranked list

  • Give me a top-10 list of the best dentists and dental clinics in Lisbon, Portugal.

    16 answers, with and without web search. Named: ADC Dental Center (4 of 16), Clínica Dentária de Lisboa (8 of 16), Clínica Dentária do Marquês (1 of 16), Clínica Dentária São Dente (2 of 16), International Advanced Dentistry (4 of 16), MALO CLINIC Lisboa (11 of 16), Mint Dental Clinic (8 of 16), Prime Dental Clinic (4 of 16).

Who can be trusted

  • Which dentists and dental clinics in Lisbon, Portugal are considered the most trustworthy?

    16 answers, with and without web search. Named: ADC Dental Center (1 of 16), Clínica Dentária de Lisboa (5 of 16), Clínica Dentária do Marquês (1 of 16), Clínica Dentária São Dente (1 of 16), International Advanced Dentistry (2 of 16), MALO CLINIC Lisboa (10 of 16), Mint Dental Clinic (3 of 16), Prime Dental Clinic (2 of 16).

  • Which dentists and dental clinics in Lisbon, Portugal are most often recommended for the way they treat people?

    16 answers, with and without web search. Named: ADC Dental Center (4 of 16), Clínica Dentária de Lisboa (4 of 16), Clínica Dentária do Marquês (3 of 16), Clínica Dentária São Dente (2 of 16), International Advanced Dentistry (1 of 16), MALO CLINIC Lisboa (8 of 16), Mint Dental Clinic (2 of 16), Oral XXI (3 of 16).

Comparing options

  • Compare the best dentists and dental clinics in Lisbon, Portugal by quality, reputation, price and waiting times.

    16 answers, with and without web search. Named: ADC Dental Center (3 of 16), Clínica Dentária de Lisboa (7 of 16), Clínica Dentária do Marquês (2 of 16), Clínica Dentária São Dente (1 of 16), International Advanced Dentistry (1 of 16), MALO CLINIC Lisboa (11 of 16), Mint Dental Clinic (2 of 16), Oral XXI (2 of 16), Prime Dental Clinic (2 of 16).

Who the experts are

  • Which dentists and dental clinics in Lisbon, Portugal have the strongest reputation?

    16 answers, with and without web search. Named: ADC Dental Center (5 of 16), Clínica Dentária de Lisboa (6 of 16), Clínica Dentária do Marquês (2 of 16), Clínica Dentária São Dente (1 of 16), International Advanced Dentistry (3 of 16), MALO CLINIC Lisboa (13 of 16), Mint Dental Clinic (5 of 16), Prime Dental Clinic (4 of 16).

Alternatives

  • Which dentists and dental clinics in Lisbon, Portugal are good alternatives if I'm not happy with the place I go to now?

    8 answers, without web search. Named: MALO CLINIC Lisboa (6 of 8).

A patient's constraint

  • I need one place for two things: a check-up with a professional cleaning, and teeth straightening with braces or aligners. Which dentists and dental clinics in Lisbon, Portugal cover both?

    8 answers, without web search. Named: Clínica Dentária de Lisboa (1 of 8), MALO CLINIC Lisboa (7 of 8).

  • I'm looking for implants to replace missing teeth. Which dentists and dental clinics in Lisbon, Portugal would you recommend?

    8 answers, without web search. Named: MALO CLINIC Lisboa (8 of 8).

  • Where can I get urgent help with a toothache in Lisbon, Portugal?

    8 answers, without web search. Named: Clínica Dentária de Lisboa (2 of 8), MALO CLINIC Lisboa (1 of 8).

A trade-off

  • Two things matter to me: teeth straightening with braces or aligners, and clear prices before treatment starts. Which dentists and dental clinics in Lisbon, Portugal are best at each?

    16 answers, with and without web search. Named: ADC Dental Center (1 of 16), MALO CLINIC Lisboa (4 of 16), Mint Dental Clinic (4 of 16).

Exploring options

  • I'm choosing among dentists and dental clinics in Lisbon, Portugal and I want urgent help with a toothache. What are my best options?

    16 answers, with and without web search. Named: Clínica Dentária de Lisboa (3 of 16), MALO CLINIC Lisboa (6 of 16), Mint Dental Clinic (3 of 16).

A problem to solve

  • Which dentists and dental clinics in Lisbon, Portugal would you suggest as a replacement? I'm tired of the place I go to now.

    16 answers, with and without web search. Named: ADC Dental Center (1 of 16), Clínica Dentária de Lisboa (7 of 16), Clínica Dentária São Dente (2 of 16), International Advanced Dentistry (4 of 16), MALO CLINIC Lisboa (10 of 16), Mint Dental Clinic (1 of 16), Prime Dental Clinic (1 of 16).

A specialist need

  • Mine is a demanding case and I need implants to replace missing teeth. Which dentists and dental clinics in Lisbon, Portugal have the best specialists for it?

    16 answers, with and without web search. Named: International Advanced Dentistry (2 of 16), MALO CLINIC Lisboa (10 of 16), Mint Dental Clinic (4 of 16), Prime Dental Clinic (2 of 16).

Budget

  • I need clear prices before treatment starts and my budget is tight. Which dentists and dental clinics in Lisbon, Portugal are on the cheaper side?

    16 answers, with and without web search. Named: ADC Dental Center (4 of 16), Clínica Dentária de Lisboa (1 of 16), MALO CLINIC Lisboa (1 of 16), Oral XXI (3 of 16).

A specific treatment

  • I need a check-up with a professional cleaning. Which dentists and dental clinics in Lisbon, Portugal are a good fit?

    8 answers, without web search. Named: Clínica Dentária de Lisboa (1 of 8), MALO CLINIC Lisboa (7 of 8).

Switching dentist

  • I want to switch. Which dentists and dental clinics in Lisbon, Portugal do people usually move to?

    8 answers, without web search. Named: Clínica Dentária de Lisboa (1 of 8), MALO CLINIC Lisboa (7 of 8).

How Lisbon was measured

Each of the 18 questions went to ChatGPT and to Gemini, in 4 separate runs; 12 of them were asked twice, with the model's web search off and on. A question that itself named a clinic is left out, since its answer would name that clinic by force. The clinics we tracked are the ones we chose to measure in Lisbon and the clinics they compete with for the same patients.

Ansmeter Benchmark v2.0, methodology 2026.10, prompt library 2026.10-service-voice. The method and its limits: Methodology. The table as a file: data.csv.

We ran this measurement on our own initiative; no clinic asked for it or paid for it. If a clinic's name or website is wrong here, write to us and we will correct it.

All 86 cities and every clinic