Centre Dentaire des Guillemins
According to our open methodology, this clinic scored 41.7/100 for transparency, reputation, service accessibility, and digital visibility.
Overall rank: #21 of 24 ranked clinics · Last checked: 8 September 2026
41.7/100
Positions by Rating Profile
- Overall Transparency & Trust#2141.7/100
- Best for Expats#2137.3/100
- Best for Dental Implants#1637/100
- Best for Emergency Dental Carenot ranked
- Best Price Transparency#2129.4/100
- Best English-speaking Clinicsnot ranked
- Best for Families / Children#1543.1/100
- Sleep Dentistry (GA / deep sedation)not ranked
General Anaesthesia & Deep Sedation
Whether the clinic documents treatment under general anaesthesia or deep / twilight sedation — "sleep dentistry", where the patient is asleep and unaware (does not feel, see, or hear the procedure). Ordinary conscious sedation, where the patient stays awake and responsive, does not count here. This is informational and does not affect the transparency score.
- ? General anaesthesia / deep sedation (sleep dentistry) — Not verified General anaesthesia or deep sedation is not mentioned on the pages read.
Summary
Practice of more than three decades in the Guillemins station quarter, with six named dentists including an endodontist working under a microscope and a dentist for children. It is the only clinic in this Belgian cohort to state that all its dentists are conventioned - that they apply the official INAMI tariffs - and the register bears that out for five of the six. It lists the authorities that supervise it, including its dental-radiography permit; its Google listing carries no website link.
Strengths
- Information Transparency: 16 of 20 points.
- No red flags identified in public sources.
Weaknesses
- Price Transparency: 0 of 15 verifiable points (missing: prices or price ranges published; cleaning price listed; filling price listed; crown price listed; implant price listed; consultation price listed; x-ray / imaging price listed)
- AI & Search Visibility: 1 of 9 verifiable points (missing: mentioned for: best dentist Belgium; mentioned for: English speaking dentist Belgium; mentioned for: dental implants Belgium; mentioned for: emergency dentist Belgium; structured data on website; dedicated service pages)
Score Breakdown
Every criterion below is scored from public sources. ✓ verified yes · ✗ verified no / not found · ◐ partial · ? unverified (scores 0, not a negative finding).
Information Transparency
16 / 20
Whether basic facts about the clinic - its team, premises, services, and location - are publicly verifiable.
| ✓ | Has a working website Kept true on the practice's own site, with the listing gap confirmed. The open question asked whether the Google record really carries no website link: it does not — opened in a browser on 2026-09-08 the place page shows an address, telephone, opening hours and business category, and offers "Add website" where the link would be. That is a gap in the Business Profile, not an absence of a site: the practice publishes dentisteliegeguillemins.be, which the research pass read, so the criterion stands. [s1] | 4/4 |
| ✓ | Dentist names listed The team page names Julien Simonis, Pierre-Edouard Deom, Marie Ponnet, Pauline Colette, Louise Cornet and Lucie Kolb, plus three assistants and a secretary. [s2] | 3/3 |
| ✓ | Dentist specializations listed Each dentist carries a stated role: endodontist, general dentist, and general and paediatric dentist. [s2] | 2/2 |
| ? | Real clinic photos Not settled by the manual browser check of 2026-09-08. The place page's lead image is a street-level view of the shopfront row on Rue des Guillemins with parked cars, carrying no signage, room, equipment or staff by which the practice could be identified. | 0/2 |
| ✓ | Service list published The clinic publishes six areas of care on its own site with the procedures each covers: prevention and check-ups including scaling and fissure sealing, conservative care, fixed and removable prostheses, implants and dental surgery including specialised procedures, aesthetic whitening and endodontics under a microscope. [s1] | 3/3 |
| ✓ | Clear contact details Telephone +32 4 253 33 41 appears in the header of every page and the full postal address in the footer; the telephone matches the Google listing. [s1] [s2] | 2/2 |
| ✗ | English website version The site exists only in French; no language switcher and no English pages were found on the pages read. [s1] [s2] | 0/2 |
| ✓ | Address and map published The full postal address is published in the footer of every page, and the same address is recorded for five of the clinic's dentists in the RIZIV/INAMI register. [s2] | 2/2 |
Price Transparency
0 / 15
Whether patients can estimate costs before visiting. Published price ranges count; exact prices are not required.
| ✗ | Prices or price ranges published The clinic makes a tariff statement of substance - that all its dentists are conventioned, which it says gives patients full transparency on prices and access to INAMI reimbursement - but it publishes no amount, range or fee table of its own. Under the methodology that is a statement about the tariff regime, not a published price. [s1] | 0/3 |
| ✗ | Cleaning price listed [s1] | 0/2 |
| ✗ | Filling price listed [s1] | 0/2 |
| ✗ | Crown price listed [s1] | 0/2 |
| ✗ | Implant price listed [s1] | 0/2 |
| ✗ | Consultation price listed [s1] | 0/2 |
| ✗ | X-ray / imaging price listed [s1] | 0/2 |
Reputation & Reviews
10.5 / 20
Public review signals. The Google rating is adjusted with a Bayesian prior (rating 4.0, weight 25) so a 5.0 from a handful of reviews does not outrank a 4.8 from hundreds.
| ◐ | Google rating (Bayesian-adjusted) Re-read live on the place page in a browser on 2026-09-08 and unchanged at 3.8. The star histogram's weighted mean, 3.773, reproduces the published figure. [gm1] [gmpb] | 1/6 |
| ◐ | Google review volume Confirmed on the place page in a browser on 2026-09-08: the headline reads 75 and the histogram sums to the same figure (51 five-star, 0 four-star, 1 three-star, 2 two-star, 21 one-star). [gm1] [gmpb] | 1.5/3 |
| ✓ | Review recency Newest Google review is dated 2026-09-04 (listing read 2026-09-25). [centre-dentaire-des-guillemins-liege-gbp-2026-09-25] | 3/3 |
| ✓ | Clinic responds to reviews Browser 2026-09-08, 8 visible reviews, sort "Most relevant": one of the eight carries an owner reply, on the oldest of the critical accounts; the four more recent critical accounts are unanswered. [gmpb] | 2/2 |
| ✗ | No recurring complaints Browser 2026-09-08, 8 visible reviews, sort "Most relevant": two readable one-star accounts share one theme — patients who cannot obtain an appointment, including when in pain. One describes being forced to cancel in early January and being told the next slot was in September, and then a conversation with the secretary explaining that too many days of maternity leave had been taken and the practice was overbooked; the other says that if you have a dental emergency in Belgium you should not expect to be treated at the clinics even in severe pain, and calls the level of dehumanisation unbelievable. Neither has an owner reply. A third one-star concerns a named dentist and months of painful work. One-star and two-star ratings together are 23 of 75, or 30.7 per cent of the base. [gmpb] | 0/2 |
| ✓ | No suspicious review patterns Browser 2026-09-08: histogram 51/0/1/2/21 with a mean of 3.773 against a published 3.8; a very large unanswered critical mass, dates running across two years and long specific accounts. No manipulation signature. [gmpb] | 2/2 |
| ✓ | Active Facebook presence The page answered HTTP 200 on 2026-09-07 under the title "Centre dentaire des Guillemins". [fb1] | 1/1 |
| ✗ | TripAdvisor presence No TripAdvisor listing found via its search for "Centre Dentaire des Guillemins Liege" and "Guillemins"; the clinic's site does not link to TripAdvisor (checked 2026-10-02). [centre-dentaire-des-guillemins-liege-ta] [centre-dentaire-des-guillemins-liege-ta-2] [centre-dentaire-des-guillemins-liege-ta-3] | 0/0.5 |
| ✗ | Other review platforms No profile found on four review platforms that cover Belgium: WhatClinic, Trustpilot, Doctoranytime and Hospital Examiner (checked 2026-10-02). [centre-dentaire-des-guillemins-liege-platforms] [centre-dentaire-des-guillemins-liege-platforms-2] [centre-dentaire-des-guillemins-liege-platforms-3] [centre-dentaire-des-guillemins-liege-platforms-4] [centre-dentaire-des-guillemins-liege-platforms-5] | 0/0.5 |
Medical Infrastructure
7.5 / 15
The range of publicly documented equipment and services. This measures documented availability, not clinical quality.
| ✓ | On-site X-ray The clinic names the Federal Agency for Nuclear Control as the authority for its dental-radiography permit, which it needs only if it operates X-ray equipment on site. [s2] | 2/2 |
| ? | CBCT (3D imaging) Cone-beam imaging is not mentioned on the pages read. | 0/2 |
| ✓ | Implantology Implants and dental surgery are one of the six published areas of care. [s1] | 2/2 |
| ✗ | Orthodontics The clinic's own six-item care list was read in full and contains no orthodontics. [s1] | 0/2 |
| ✓ | Oral surgery The same area of care covers implants, extractions and specialised surgical procedures. [s1] | 2/2 |
| ✓ | Pediatric dentistry The clinic states that its care is designed for children, adults and older patients, and one of its dentists is named as a general and paediatric dentist. [s1] [s2] | 1.5/1.5 |
| ? | Emergency care Emergency or same-day care is not documented on the pages read. | 0/1.5 |
| ? | Works with international patients No arrangements for international patients are documented; the site is French-only. | 0/2 |
Communication & Service
2.5 / 10
How easy it is to contact the clinic, get answers, and book - especially for international patients.
| ? | WhatsApp / LINE available No messenger contact is published on the pages read. | 0/2 |
| ? | Response speed | 0/1.5 |
| ? | English spoken The clinic publishes nothing about the languages it works in and runs a French-only site; not asserted either way. | 0/2.5 |
| ✓ | Pre-visit consultation possible The clinic runs a contact page reachable from every page for questions and appointment requests. [s1] | 1.5/1.5 |
| ✓ | Clear service explanations Each area of care is spelled out with the procedures it covers in plain language, and the clinic explains what being conventioned means for the patient's bill. [s1] | 1/1 |
| ✗ | Convenient opening hours The full published week was read on the practice's own Google Business record in a browser on 2026-09-08 — the practice publishes no hours elsewhere: Monday to Friday 09:00-18:30, closed Saturday and Sunday. No evening and no weekend opening. [gmpb] | 0/1.5 |
AI & Search Visibility
1 / 10
Whether the clinic is discoverable when patients search - including via AI assistants. Checked with fixed queries: "best dentist Belgium", "English speaking dentist Belgium", "dental implants Belgium", "emergency dentist Belgium", "Belgium dental clinic for expats".
| ✗ | Mentioned for: best dentist Belgium Checked in the results captured 2026-09-07 for the canonical city query; neither the clinic's domain nor its name appears. [av1] | 0/1 |
| ✗ | Mentioned for: English speaking dentist Belgium Checked in the results captured 2026-09-07 for the canonical city query; neither the clinic's domain nor its name appears. [av2] | 0/1 |
| ✗ | Mentioned for: dental implants Belgium Checked in the results captured 2026-09-07 for the canonical city query; neither the clinic's domain nor its name appears. [av3] | 0/1 |
| ✗ | Mentioned for: emergency dentist Belgium Checked in the results captured 2026-09-07 for the canonical city query; neither the clinic's domain nor its name appears. [av4] | 0/1 |
| ? | Mentioned for: Belgium dental clinic for expats Query not run in the AI-visibility pass: the expats query was captured only for the first research city of each country, which for Belgium is Brussels. | 0/1 |
| ✗ | Structured data on website Neither page read carries a schema.org JSON-LD block or equivalent markup. [s1] [s2] | 0/1.5 |
| ◐ | Google indexing quality The clinic's own site takes rank 1 for its name plus city, but no further page of its domain appears in the remaining 19 results, which are its Facebook page, directory listings and unrelated documents (web search 2026-09-07). [giq1] | 1/2 |
| ✗ | Dedicated service pages The site runs four pages - home, team, treatments and contact - with all six areas of care described on the single treatments page rather than one page each. [s1] | 0/1.5 |
Ranking leaders in AI answers
The queries above are this index's own check. The three leading clinics have also been measured in full: how often ChatGPT and Gemini name them when a patient asks them to recommend a dentist.
- #1Winston Dental Clinic10.7 of 100View report →
- #2VIDENT Dental Clinic40.6 of 100View report →
- #3ALC Dental20.6 of 100View report →
Measured by Ansmeter, 7 October 2026. Ansmeter is an affiliated service. Its figure is not part of this rating and does not affect positions — scores change only when public data changes.
Licensing & Credentials
Whether the clinic publishes its operating licence and the dentists working there together with their professional licence numbers. A verified “not published” is recorded as a red flag; data we have not checked yet is shown as unverified and carries no penalty.
Clinic operating licence: not checked against public sources yet — unverified, no penalty
Dentists & RIZIV/INAMI numbers
| Dentist | Specialization | RIZIV/INAMI No. | Notes |
|---|---|---|---|
| Julien Simonis [reg1] [s1] | Endodontist (clinic's own site); RIZIV/INAMI qualification 001, general dentist | RIZIV/INAMI 311114-62 | The clinic describes this dentist as conventioned; the register records otherwise, and the register is the primary source. |
| Pierre-Edouard Deom [reg2] | General dentistry (clinic's own site); RIZIV/INAMI qualification 001, general dentist | RIZIV/INAMI 308148-21 | Convention number, not a licence number: Belgium publishes no searchable licence register. |
| Lucie Kolb [reg3] | General and paediatric dentistry (clinic's own site); RIZIV/INAMI qualification 001, general dentist | RIZIV/INAMI 319262-62 | Convention number, not a licence number: Belgium publishes no searchable licence register. |
| Marie Ponnet [reg4] | General dentistry (clinic's own site); RIZIV/INAMI qualification 001, general dentist | RIZIV/INAMI 318160-97 | Convention number, not a licence number: Belgium publishes no searchable licence register. |
| Pauline Colette [reg5] | General dentist (RIZIV/INAMI qualification 001, algemeen tandarts) | RIZIV/INAMI 314138-45 | Convention number, not a licence number: Belgium publishes no searchable licence register. |
| Louise Cornet [reg6] | General dentist (RIZIV/INAMI qualification 001, algemeen tandarts) | RIZIV/INAMI 318150-10 | Convention number, not a licence number: Belgium publishes no searchable licence register. |
Red Flags
No red flags identified in the public sources we reviewed.
Data We Could Not Verify
- Information Transparency: Real clinic photos
- Medical Infrastructure: CBCT (3D imaging)
- Medical Infrastructure: Emergency care
- Medical Infrastructure: Works with international patients
- Communication & Service: WhatsApp / LINE available
- Communication & Service: Response speed
- Communication & Service: English spoken
- AI & Search Visibility: Mentioned for: Belgium dental clinic for expats
Unverified items score 0 points but are not treated as negative findings. If you can document any of them, please send a correction.
Contact Information
| Website | https://www.dentisteliegeguillemins.be/ |
|---|---|
| Phone | +32 4 253 33 41 |
| https://www.facebook.com/Centredentairedesguillemins/ | |
| Google Maps | Map listing |
| Address | Rue des Guillemins 72, 4000 Liège, Belgium |
Contact details are provided for identification only and may change; verify with the clinic directly.
Sources
| ID | Source | What it supports | Accessed |
|---|---|---|---|
| s1 | https://www.dentisteliegeguillemins.be/ | Clinic home page: six areas of care with the procedures each covers, the statement that all its dentists are conventioned, republished patient testimonials, telephone | 2026-09-07 |
| s2 | https://www.dentisteliegeguillemins.be/notre-equipe | Team page: six named dentists with their roles, support staff, full postal address and the list of supervisory authorities including the dental-radiography permit | 2026-09-07 |
| gm1 | https://www.google.com/maps/preview/place/Centre+Dentaire+Des+Guill… | Live Google Maps place record: rating, address, telephone, business categories and pin coordinates, and the absence of a website link on the listing | 2026-09-07 |
| fb1 | https://www.facebook.com/Centredentairedesguillemins/ | Clinic Facebook page, live 2026-09-07 | 2026-09-07 |
| reg0 | https://www.vivalis.brussels/fr/accompagner-les-acteurs-socio-sanit… | The one Belgian institutional register that could be read in full: 162 agreed socio-health institutions across 30 sectors, none of them dental | 2026-09-07 |
| reg1 | https://webappsa.riziv-inami.fgov.be/silverpages/Home/SearchHcw/?Fo… | RIZIV/INAMI provider record for Julien Simonis: number, qualification, convention status and work address under the clinic's name | 2026-09-07 |
| reg2 | https://webappsa.riziv-inami.fgov.be/silverpages/Home/SearchHcw/?Fo… | RIZIV/INAMI provider record for Pierre-Edouard Deom: number, qualification, conventioned status and work address under the clinic's name | 2026-09-07 |
| reg3 | https://webappsa.riziv-inami.fgov.be/silverpages/Home/SearchHcw/?Fo… | RIZIV/INAMI provider record for Lucie Kolb: number, qualification, conventioned status and work address under the clinic's name | 2026-09-07 |
| reg4 | https://webappsa.riziv-inami.fgov.be/silverpages/Home/SearchHcw/?Fo… | RIZIV/INAMI provider record for Marie Ponnet: number, qualification, conventioned status and work address under the clinic's name | 2026-09-07 |
| reg5 | https://webappsa.riziv-inami.fgov.be/silverpages/Home/SearchHcw/?Fo… | RIZIV/INAMI provider record for Pauline Collette, looked up by number | 2026-09-07 |
| reg6 | https://webappsa.riziv-inami.fgov.be/silverpages/Home/SearchHcw/?Fo… | RIZIV/INAMI provider record for Louise Cornet, looked up by number | 2026-09-07 |
| av1 | search:best dentist Liège Belgium | Canonical city visibility query, results captured 2026-09-07 | 2026-09-07 |
| av2 | search:English speaking dentist Liège Belgium | Canonical city visibility query, results captured 2026-09-07 | 2026-09-07 |
| av3 | search:dental implants Liège Belgium | Canonical city visibility query, results captured 2026-09-07 | 2026-09-07 |
| av4 | search:emergency dentist Liège Belgium | Canonical city visibility query, results captured 2026-09-07 | 2026-09-07 |
| giq1 | search:"Centre Dentaire des Guillemins" Liege | Name query used to judge indexing quality: the clinic's own site takes rank 1 and no further own-domain result appears in 20 | 2026-09-07 |
| gmpb | https://www.google.com/maps/place/x/@50.628029,5.566985,17z/data=!4… | Live Google Maps place page opened in a browser on 2026-09-08: headline rating and review count, the five star-histogram buckets, eight most-relevant reviews with star values, dates and owner replies, the full published week of opening hours, and the absence of any website field on the record | 2026-09-08 |
| centre-dentaire-des-guillemins-liege-gbp-2026-09-25 | https://www.google.com/maps?cid=365264787077582502&hl=en | Google listing read on 2026-09-25: rating 3.8 from 75 reviews; star histogram 1★ 21 / 2★ 2 / 3★ 1 / 4★ 0 / 5★ 51; newest review dated 2026-09-04. | 2026-09-25 |
| centre-dentaire-des-guillemins-liege-ta | https://www.tripadvisor.com/TypeAheadJson?action=API&query=Centre%2… | TripAdvisor's own search for "Centre Dentaire des Guillemins Liege", run 2026-10-02, returns 12 results, none of them this clinic (e.g. La Voie Du Plaisir - Massage Centre, Liege, Belgium; Centre de Loisirs Ovifat, Ovifat, Belgium) | 2026-10-02 |
| centre-dentaire-des-guillemins-liege-ta-2 | https://www.tripadvisor.com/TypeAheadJson?action=API&query=Guillemins | TripAdvisor's own search for "Guillemins", run 2026-10-02, returns 9 results, none of them this clinic (e.g. Gare de Liege-Guillemins, Liege, Belgium; ibis Styles Liege Guillemins, Liege, Belgium) | 2026-10-02 |
| centre-dentaire-des-guillemins-liege-ta-3 | https://www.dentisteliegeguillemins.be/ | The clinic's website, home page and 2 linked pages (contact, team, practice) read 2026-10-02: no link to or mention of TripAdvisor | 2026-10-02 |
| centre-dentaire-des-guillemins-liege-platforms | https://www.whatclinic.com/dentists/belgium/liege | WhatClinic's Liège dentist listing read 2026-10-02, every page (1 page, 5 clinics), checked against its profile sitemaps (73 Belgian dentist profiles, each one outside the listing opened) and against direct profile addresses built from the clinic's name: no profile at this clinic's address or with its dentists | 2026-10-02 |
| centre-dentaire-des-guillemins-liege-platforms-2 | https://www.trustpilot.com/review/dentisteliegeguillemins.be | Trustpilot, read 2026-10-02: no company page exists for dentisteliegeguillemins.be, the clinic's own website ("the page you're looking for could not be found") | 2026-10-02 |
| centre-dentaire-des-guillemins-liege-platforms-3 | https://www.doctoranytime.be/sitemaps/hospitals | Doctoranytime's lists of practice pages (917) and practitioner pages (5,313, of them 575 dentists and 64 orthodontists), read 2026-10-02: no page for this practice or for its dentists (Simonis, Deom, Kolb, Ponnet, Colette, Cornet) | 2026-10-02 |
| centre-dentaire-des-guillemins-liege-platforms-4 | https://hospitalexaminer.com/countries/belgium/liege/ | Hospital Examiner's Liège listing read 2026-10-02 (319 listings, the dental ones opened for their addresses): none for this clinic | 2026-10-02 |
| centre-dentaire-des-guillemins-liege-platforms-5 | https://www.whatclinic.com/dentists/belgium/centre-dentaire-des-gui… | WhatClinic address under the clinic's name, opened 2026-10-02: it leads to the Belgian dentist listing — a former profile, now removed | 2026-10-02 |
Change History
| Date | Change |
|---|---|
| 2026-10-02 | Presence on review sites checked: TripAdvisor — no; other review platforms — no. |
| 2026-09-29 | Corrected 2026-09-29: review recency within 3 months (newest review dated 2026-09-04). |
| 2026-09-08 | Checked by hand in a browser: the 75-review count confirmed against the histogram; recurring complaints recorded true on two unanswered one-star accounts sharing the theme of patients unable to obtain an appointment, including in pain; the published opening week read and the hours criterion settled; and the absence of a website link on the Business Profile confirmed live, without disturbing the criterion, which rests on the practice's own site. |
| 2026-09-07 | Adversarial verification: review count read live from the Google place record; the two dentists the clinic names on its team page but the card had not carried - Pauline Colette and Louise Cornet - added to the licensing table from their own register records; the disagreement between the clinic's "all our dentists are conventioned" and the register's reading of Julien Simonis re-confirmed live in both directions. |
| 2026-09-07 | Initial data collection (Belgium): home and team pages read live; Google Maps place record read live for rating, address, telephone, categories and coordinates, and the absence of a website link on the listing recorded; Facebook page liveness confirmed; four named dentists matched in the RIZIV/INAMI provider register by postcode search on 4000 and confirmed by single-record lookup, with the register contradicting the clinic's blanket claim that all its dentists are conventioned in one case - recorded in the licensing block; four canonical visibility queries taken from the central capture of 2026-09-07, the fifth not run for this city. Review count, histogram, recency, owner replies, opening hours, premises photos and third-party review profiles left null and queued for a manual browser check. |
A question or a correction?
Have a question, a suggestion, or a correction to this page? Get in touch — we read every message. Verified data corrections are reviewed against sources and applied with a public change-history entry.