Dens Artis – Fachzahnarztpraxis Dr. Gasser
According to our open methodology, this clinic scored 55.6/100 for transparency, reputation, service accessibility, and digital visibility.
Overall rank: #20 of 24 ranked clinics · Last checked: 8 September 2026
55.6/100
Positions by Rating Profile
- Overall Transparency & Trust#2055.6/100
- Best for Expats#2050.3/100
- Best for Dental Implants#2245.5/100
- Best for Emergency Dental Care#2047.8/100
- Best Price Transparency#1839.6/100
- Best English-speaking Clinics#1955.2/100
- Best for Families / Childrennot ranked
- 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
Summary
Specialist practice on Greifengasse in Kleinbasel led by a dentist holding the federal specialist title in reconstructive dentistry, with a second named dentist, an English page for international patients and separate pages for implants, prostheses and veneers. It publishes no prices. Both dentists hold active Basel-Stadt practice authorisations recorded in MedReg. The practice runs a second domain, zahnarztgasser.ch, which is the one its Google listing points at.
Strengths
- Information Transparency: 20 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)
- Communication & Service: 3.5 of 8.5 verifiable points (missing: whatsApp / LINE available; pre-visit consultation possible; convenient opening hours)
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
20 / 20
Whether basic facts about the clinic - its team, premises, services, and location - are publicly verifiable.
| ✓ | Has a working website https://www.densartis.ch/ returned HTTP 200 with 4,831 characters of the practice’s own content — services, team, practice, contact, opening hours — read on 2026-09-07. [s1] | 4/4 |
| ✓ | Dentist names listed The team page names Dr. med. dent. Thomas Gasser as owner and dentist and med. dent. Julia Ledergerber as dentist, next to the named practice manager, hygienist and assistants. [s2] | 3/3 |
| ✓ | Dentist specializations listed The site footer publishes the owner’s titles against his name — specialist dentist for reconstructive dentistry (SSRD), MAS in oral implantology from the University of Zurich, member of SSO, ITI, EPA and SGDMFR — and the practice keeps a specialisation page of its own. [s1] [s2] | 2/2 |
| ✓ | Real clinic photos Settled in a browser on 2026-09-08 from the practice's own Google Business Profile: the lead owner photograph shows one of this practice's own treatment rooms, with the chair, unit and cabinetry in the daylit corner room at Greifengasse 1. [gmpb] | 2/2 |
| ✓ | Service list published The navigation publishes a services section with separate pages for reconstructive dentistry, prostheses and veneers, plus a before-and-after gallery of its own cases. [s1] | 3/3 |
| ✓ | Clear contact details Address Greifengasse 1, 4058 Basel, telephone +41 61 681 00 10, the practice e-mail address on the SSO secure-mail domain and the weekday opening hours are published on the site. [s1] | 2/2 |
| ✓ | English website version The practice publishes an English page for international patients, "English Speaking Dentist Basel – Dental Care for Expats", at its own /en/ route. [s3] | 2/2 |
| ✓ | Address and map published The site publishes the postal address in its footer together with the opening hours and links its location. [s1] | 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 Checked the practice’s own navigation, the international-patients page and the footer link labelled Tariffe: the link resolves to the site’s 404 page, and no price, price list, tariff point value or range is published anywhere else on the site. [s1] [s3] | 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
15 / 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 4.8. The star histogram's weighted mean, 4.810, reproduces the published figure. [gmp1] [gmpb] | 4/6 |
| ◐ | Google review volume Headline count read on the place page in a browser on 2026-09-08. The histogram sums to the same figure: 20 five-star, 0 four-star, 0 three-star, 0 two-star and 1 one-star = 21. [gmpb] | 1/3 |
| ✓ | Review recency Newest Google review is dated 2026-08-21 (listing read 2026-09-29). [dens-artis-dr-gasser-basel-gbp-2026-09-29] | 3/3 |
| ✓ | Clinic responds to reviews Browser 2026-09-08, 8 visible reviews, sort "Most relevant": the owner has replied individually to all eight. [gmpb] | 2/2 |
| ✓ | No recurring complaints Browser 2026-09-08, 8 visible reviews, sort "Most relevant": no review below five stars surfaced and no repeated theme is readable. The single one-star rating on the listing is 1 of 21, so one-star and two-star ratings together are 4.8 per cent of the base. [gmpb] | 2/2 |
| ✓ | No suspicious review patterns Browser 2026-09-08: histogram 20/0/0/0/1 with a mean of 4.810 against a published 4.8. Two facts are disclosed rather than scored — six of the eight visible reviews were written inside a three-month window (five to seven months ago), and several reviewers identify themselves as fellow dentists or dental technicians, which is ordinary for a referral specialist practice. Against manipulation: a genuine one-star rating stands on the listing, the accounts describe different procedures and colleagues, and the owner answers each individually. [gmpb] | 2/2 |
| ✓ | Active Facebook presence The clinic's own Facebook page (Greifengasse 1, with the practice's phone, e-mail and website) is active: latest post 2026-09-11 (checked 2026-10-02). [dens-artis-dr-gasser-basel-fb] | 1/1 |
| ✗ | TripAdvisor presence No TripAdvisor listing found via its search for "Dens Artis Basel" and "Dens Artis"; the clinic's site does not link to TripAdvisor (checked 2026-10-05). [dens-artis-dr-gasser-basel-tripadvisor] [dens-artis-dr-gasser-basel-tripadvisor-2] | 0/0.5 |
| ✗ | Other review platforms No review profile found on WhatClinic, Trustpilot or local.ch, where ratings are switched off for its entry (checked 2026-10-01). [dens-artis-dr-gasser-basel-platforms] [dens-artis-dr-gasser-basel-platforms-2] [dens-artis-dr-gasser-basel-platforms-3] | 0/0.5 |
Medical Infrastructure
5.5 / 15
The range of publicly documented equipment and services. This measures documented availability, not clinical quality.
| ? | On-site X-ray | 0/2 |
| ? | CBCT (3D imaging) | 0/2 |
| ✓ | Implantology The practice publishes implants as one of its declared fields and its owner holds an MAS in oral implantology; "Dental implants provider" and "Dental implants periodontist" are categories on its own Google Business Profile. [s1] [gmp1] | 2/2 |
| ? | Orthodontics | 0/2 |
| ? | Oral surgery | 0/2 |
| ? | Pediatric dentistry | 0/1.5 |
| ✓ | Emergency care The team page publishes a standing emergency contact number for the practice. [s2] | 1.5/1.5 |
| ✓ | Works with international patients The practice publishes a page of its own for international patients and expatriates in English. [s3] | 2/2 |
Communication & Service
3.5 / 10
How easy it is to contact the clinic, get answers, and book - especially for international patients.
| ✗ | WhatsApp / LINE available No WhatsApp, Line or comparable messaging channel is published on the practice’s own site; contact runs through the telephone, the e-mail address and online booking. [s1] | 0/2 |
| ? | Response speed | 0/1.5 |
| ✓ | English spoken The practice publishes an English page describing itself as an English-speaking dentist in Basel. [s3] | 2.5/2.5 |
| ✗ | Pre-visit consultation possible Read on 2026-09-09 after the page did not load on 2026-09-08; the site is plain server-rendered Wix content. The English-speaking-dentist page invites patients "seeking a second opinion" to "discuss your individual situation" — a general consultation invitation, not an offer to draw up a written cost estimate (contrast the UZB Basel precedent, which names a dedicated Kostenvoranschlag section). No page on the site offers one. [s3] | 0/1.5 |
| ✓ | Clear service explanations Each field has its own page, the practice keeps a before-and-after gallery explaining its own cases and the international-patients page explains the process in English. [s1] [s3] | 1/1 |
| ✗ | Convenient opening hours Published hours are Monday to Friday, from 08:00 or 09:00 to 17:00 or 18:00, with no evening or weekend surgery. [s1] | 0/1.5 |
AI & Search Visibility
6 / 10
Whether the clinic is discoverable when patients search - including via AI assistants. Checked with fixed queries: "best dentist Switzerland", "English speaking dentist Switzerland", "dental implants Switzerland", "emergency dentist Switzerland", "Switzerland dental clinic for expats".
| ✗ | Mentioned for: best dentist Switzerland Web search 2026-09-07, 10 results checked. The clinic does not appear in the recorded results for the query "best dentist Basel Switzerland", matched by its own domain and by its name in the result titles. [av1] | 0/1 |
| ✓ | Mentioned for: English speaking dentist Switzerland Web search 2026-09-07, 10 results checked. The clinic appears in the recorded results for the query "English speaking dentist Basel Switzerland", matched by its own domain and by its name in the result titles. [av2] | 1/1 |
| ✗ | Mentioned for: dental implants Switzerland Web search 2026-09-07, 6 results checked. The clinic does not appear in the recorded results for the query "dental implants Basel Switzerland", matched by its own domain and by its name in the result titles. [av3] | 0/1 |
| ✗ | Mentioned for: emergency dentist Switzerland Web search 2026-09-07, 7 results checked. The clinic does not appear in the recorded results for the query "emergency dentist Basel Switzerland", matched by its own domain and by its name in the result titles. [av4] | 0/1 |
| ? | Mentioned for: Switzerland dental clinic for expats Query not run in AI-visibility pass — the pre-pass of 2026-09-07 ran the expat query for the first research city of each country only, which for Switzerland is Zurich. | 0/1 |
| ✓ | Structured data on website The delivered HTML carries three application/ld+json blocks, including a schema.org Dentist block with the postal address, telephone and opening hours. [s1] | 1.5/1.5 |
| ✓ | Google indexing quality The practice’s own domain takes six of the first fourteen results — home page, English page, team page, practice page, specialisation page and a blog post — with search.ch, Comparis and Doc24 below (web search 2026-09-07, 20 results). [giq1] | 2/2 |
| ✓ | Dedicated service pages Separate URLs for the treatment overview, prostheses, veneers, the specialisation page and the international-patients page. [s1] | 1.5/1.5 |
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.
- #1ZurichDental Bahnhofplatz17.8 of 100View report → report in German
- #2CHD Clinique d'Hygiène Dentaire Genève Cornavin46.3 of 100View report → report in German
- #3Clinique Dentaire de Chantepoulet29.2 of 100View report → report in German
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 & MedReg records
| Dentist | Specialization | MedReg No. | Notes |
|---|---|---|---|
| Dr. med. dent. Thomas Johannes Walter Gasser [reg1] | Specialist dentist for reconstructive dentistry (federal specialist title); MAS oral implantology | MedReg 55533, GLN 7601003332858 | Cantonal authorisation to practise under own responsibility: granted and active, no restrictions. |
| med. dent. Julia Martina Ledergerber [reg1] | Dentist | MedReg 208360, GLN 7601009145162 | Cantonal authorisation to practise under own responsibility: granted and active, no restrictions. |
Red Flags
No red flags identified in the public sources we reviewed.
Data We Could Not Verify
- Medical Infrastructure: On-site X-ray
- Medical Infrastructure: CBCT (3D imaging)
- Medical Infrastructure: Orthodontics
- Medical Infrastructure: Oral surgery
- Medical Infrastructure: Pediatric dentistry
- Communication & Service: Response speed
- AI & Search Visibility: Mentioned for: Switzerland 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.densartis.ch/ |
|---|---|
| Phone | +41 61 681 00 10 |
| https://www.facebook.com/p/Dr-Thomas-JW-Gasser-100086306806724/ | |
| Google Maps | Map listing |
| Address | Greifengasse 1, 4058 Basel, Switzerland |
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.densartis.ch/ | Clinic home page: services, contacts, opening hours, owner’s titles, Instagram accounts, schema.org Dentist markup | 2026-09-07 |
| s2 | https://www.densartis.ch/zahnaerzte-basel | Named team with roles and the practice emergency number | 2026-09-07 |
| s3 | https://www.densartis.ch/english-speaking-dentist-basel | English page for international patients and expatriates | 2026-09-07 |
| gmp1 | https://www.google.com/maps/preview/place/Fachzahnarztpraxis+Dr.+Ga… | Live Google Maps place: name, address, star rating, pin coordinates, phone, business categories, and the second domain zahnarztgasser.ch that the listing points at | 2026-09-07 |
| reg1 | https://www.healthreg-public.admin.ch/medreg/search | MedReg federal register: cantonal practice authorisations of Thomas Gasser (id 55533) and Julia Ledergerber (id 208360), canton of Basel-Stadt, both recorded at Greifengasse 1 | 2026-09-07 |
| reg2 | https://www.healthreg-public.admin.ch/betreg/search | BetReg federal facility register: queried for Basel dental companies and for the practice name; this practice is not listed | 2026-09-07 |
| av1 | search:best dentist Basel Switzerland | Canonical visibility query (AI-visibility search pre-pass) | 2026-09-07 |
| av2 | search:English speaking dentist Basel Switzerland | Canonical visibility query (AI-visibility search pre-pass) | 2026-09-07 |
| av3 | search:dental implants Basel Switzerland | Canonical visibility query (AI-visibility search pre-pass) | 2026-09-07 |
| av4 | search:emergency dentist Basel Switzerland | Canonical visibility query (AI-visibility search pre-pass) | 2026-09-07 |
| giq1 | search:"Dens Artis" Basel Zahnarzt | Indexing check: the practice’s own domain takes six of the first fourteen results | 2026-09-07 |
| gmpb | https://www.google.com/maps/place/x/@47.5609373,7.5908687,17z/data=… | 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 dates and owner replies, the practice's two published domains, and the place's own lead photography of a treatment room | 2026-09-08 |
| dens-artis-dr-gasser-basel-gbp-2026-09-29 | https://www.google.com/maps?cid=17166710909323243216&hl=en | Google listing read on 2026-09-29: rating 4.8 from 21 reviews; star histogram 1★ 1 / 2★ 0 / 3★ 0 / 4★ 0 / 5★ 20; newest review dated 2026-08-21; 5 of the 5 newest reviews carry an owner reply, latest dated 2026-08-21. | 2026-09-29 |
| dens-artis-dr-gasser-basel-platforms | https://www.whatclinic.com/dentists/switzerland/basel | WhatClinic: its Basel dentist catalog (8 profiles of 9 declared) and its profile sitemaps (8 Basel profiles) have no profile for Dens Artis or Dr. Gasser (checked 2026-10-01) | 2026-10-01 |
| dens-artis-dr-gasser-basel-platforms-2 | https://www.trustpilot.com/review/densartis.ch | Trustpilot: no company page for densartis.ch (checked 2026-10-01) | 2026-10-01 |
| dens-artis-dr-gasser-basel-platforms-3 | https://www.local.ch/de/d/basel/4058/zahnarzt/zahnarztpraxis-dr-gas… | local.ch entry "Zahnarztpraxis Dr. Gasser - Di Meo", Greifengasse 1, 4058 Basel: ratings are switched off for this entry, so it carries no user ratings or reviews (checked 2026-10-01) | 2026-10-01 |
| dens-artis-dr-gasser-basel-fb | https://www.facebook.com/p/Dr-Thomas-JW-Gasser-100086306806724/ | Facebook page "Dr Thomas JW Gasser" (Basel) read on 2026-10-02; address Greifengasse 1, Basel, Switzerland, 4058; phone +41 61 681 00 10; website https://www.densartis.ch/; 29 followers; Not yet rated (0 reviews); latest post 2026-09-11 | 2026-10-02 |
| dens-artis-dr-gasser-basel-tripadvisor | https://www.tripadvisor.com/TypeAheadJson?action=API&details=true&q… | TripAdvisor's own search, read 2026-10-05: 12 suggestions for "Dens Artis Basel" (5 attractions, 7 hotels), none of them a dental practice in or near Basel; 12 suggestions for "Dens Artis" (3 places, 4 attractions, 5 hotels), none of them a dental practice in or near Basel; no listing for this clinic | 2026-10-05 |
| dens-artis-dr-gasser-basel-tripadvisor-2 | https://www.densartis.ch/ | Clinic's website, home page read 2026-10-05: no link to a TripAdvisor page | 2026-10-05 |
Change History
| Date | Change |
|---|---|
| 2026-10-05 | TripAdvisor presence checked on 2026-10-05: no listing found for this clinic. |
| 2026-10-02 | Facebook presence checked on 2026-10-02: the clinic's own page is active (latest post 2026-09-11). |
| 2026-10-01 | Review platforms re-checked: no profile of the clinic on WhatClinic, Trustpilot or local.ch, so "reviewed on other platforms" changed from yes to no. |
| 2026-09-29 | Corrected 2026-09-29: active Facebook presence now unverified: no Facebook search is on record, so the absence of a page is not established; review recency within 3 months (newest review dated 2026-08-21). |
| 2026-09-08 | Checked by hand in a browser: review count, histogram, recency, owner-reply state, complaint and manipulation readings recorded; practice photographs settled from the profile's own lead image; the listing confirmed to carry both densartis.ch and zahnarztgasser.ch alongside the card's address and telephone, so the second domain belongs to this practice. |
| 2026-09-07 | Initial data collection: clinic site read body-first across home, team and English pages, and the footer Tariffe link followed to its 404 page, which established the absence of any published price; Google Maps place record read live for rating, coordinates, address, phone and business categories, and the second domain in the listing recorded; MedReg queried for both named dentists and the full licence records read, both at the card address; BetReg queried for Basel and by name with no entry found; the four canonical visibility queries taken from the AI-visibility pre-pass; indexing quality measured with a name search. |
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.
Contact us about Dens Artis – Fachzahnarztpraxis Dr. Gasser Email us