World Square Centre

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Sydney CBD · World Square · Suite 38, Level 3

Specialist Orthodontist at World Square Sydney CBD

ACAOO is Sydney CBD’s specialist orthodontic centre, located in the heart of World Square. AI-powered braces, clear aligners, and expert bite correction — led by Dr. Gareth Ho for over 20 years.

About Our Clinic

Sydney CBD's home of AI orthodontics

ACAOO — The Australian Centre for AI Orthodontics and Orthopaedics — is a state-of-the-art specialist orthodontic centre located in the World Square precinct, at the heart of Sydney CBD. Founded in 2007 by Dr. Gareth Ho as Sydney’s first practice dedicated exclusively to adult orthodontics, ACAOO expanded in 2025 to welcome patients of all ages.

Our clinic was designed intentionally — a spacious, calm environment that allows you to step away from the pace of the CBD and focus entirely on your care. Every consultation, treatment plan, and review is personally led by Dr. Gareth Ho, a dual-qualified Specialist Orthodontist with postgraduate degrees in both Orthodontics (University of Sydney) and Paediatric Dentistry (University of Melbourne).

In 2025, Dr. Gareth Ho founded AI Orthodontics Australia — advancing smarter diagnostics, AI-powered treatment planning, and remote monitoring tools for orthodontic patients across Sydney and beyond. ACAOO is the clinical home of that initiative.

AI-Powered Precision

Every treatment plan built with 3D scanning and AI diagnostics

Complex Cases Welcome

Surgical orthodontics, severe bites, and medically complex patients

Non-Surgical First

Smartee S8-SGTB for Class II correction without jaw surgery

Personal Oversight

Dr. Gareth Ho personally leads every stage — no junior handoffs

Treatments at World Square

What we treat at our Sydney CBD clinic

Every treatment at ACAOO is planned by a specialist orthodontist using AI-powered 3D imaging — not a general dentist or technician.

Advanced Bite Correction

Smartee S8 Digital Twin Block — Overbite & Overjet Correction

A breakthrough clear aligner system that corrects Class II overbite and overjet by repositioning the jaw — without surgery. ACAOO’s flagship non-surgical bite correction treatment.

Lingual Braces

Placed on the inner surface of teeth — completely invisible. ACAOO’s most popular option for professionals and image-conscious adults in Sydney CBD.

Clear Aligners

Discreet, removable aligner trays planned with AI precision. Suitable for mild to complex tooth movement — all monitored remotely via DentalMonitoring.

Metal & Ceramic Braces

Reliable and precise for complex alignment and bite correction across all age groups — metal or tooth-coloured ceramic options available.

AI Orthodontics & DentalMonitoring

Remote progress tracking via AI — fewer in-clinic visits, smarter oversight. Exclusive to ACAOO’s AI-powered treatment workflows in Sydney CBD.

Special Occasion & Event Plans

Tailored treatment plans for weddings, graduations, and life milestones — timeline-led orthodontic care for your important dates.

Surgical Orthodontics

Corrective jaw surgery coordinated with specialist oral and maxillofacial surgeons for severe skeletal discrepancies that require surgical correction.

Children & Teen Orthodontics

Early intervention and adolescent orthodontic treatment — Dr. Ho’s dual qualification in Paediatric Dentistry and Orthodontics covers the full spectrum.

Complex & Medically Compromised Cases

ACAOO accepts orthodontic referrals for patients with complex medical histories, periodontal conditions, or cases other practices have declined.

Who We See

Orthodontic care for every stage of life

ACAOO treats patients across all ages and case complexities. Our World Square Sydney CBD location is accessible from across the greater Sydney region.

CBD Professionals & Adults

Discreet options — lingual braces and clear aligners — designed around demanding work schedules. Remote monitoring reduces in-clinic appointments.

Children & Teenagers

Early intervention and adolescent treatment from a dual-qualified specialist in both Orthodontics and Paediatric Dentistry.

Complex & Surgical Cases

Patients referred for jaw surgery, severe bite issues, or cases declined elsewhere. Dr. Ho provides honest specialist assessment and non-surgical alternatives where possible.

International & Multilingual Patients

Consultations in English, Chinese (Mandarin and Cantonese), and Korean. ACAOO's World Square location is central for Sydney's diverse international community.

Getting Here

Located at the heart of Sydney CBD

ACAOO is located in the World Square precinct — one of Sydney CBD’s most accessible locations, within walking distance of Town Hall and Central stations, multiple bus routes, and CBD parking.

Suite 38 is on Level 3 of 650 George Street, within the World Square commercial tower. The building entrance is on George Street, between Liverpool and Goulburn Streets.

Transport & Parking

🚇 Train

Town Hall Station — 4 min walk via George Street. Central Station — 7 min walk.

🚌 Bus

George Street stops serve routes from North, West, and Eastern Sydney directly outside.

🚇 Light Rail

Capitol Square light rail stop — 3 min walk from the World Square entrance.

🅿️ Parking

World Square car park accessible from Goulburn Street. Wilson Parking on Pitt Street nearby.

Serving Greater Sydney

Patients visit us from across Sydney

Our World Square location is central and easily accessible by train, bus, and light rail — making ACAOO convenient for patients from Sydney CBD and surrounding suburbs.

Sydney CBD

World Square

Town Hall

Central

Surry Hills

Pyrmont

Darlinghurst

Haymarket

Ultimo

Glebe

Newtown

Redfern

Circular Quay

The Rocks

Darling Harbour

Chippendale

Waterloo

Zetland

Woolloomooloo

Kings Cross

Potts Point

Balmain

Leichhardt

Ashfield

Surrounding Suburbs

Why Choose ACAOO

Why Sydney CBD patients choose us

ACAOO is not a general dental practice that also offers orthodontics. We are a specialist centre — and every element of our World Square clinic reflects that.

Specialist-only care — not a dental chain

Dr. Ho is a dual-qualified Specialist Orthodontist. Every patient is assessed and treated by the same specialist from consultation to final retainer check.

AI-powered, not guesswork

Every treatment plan is built using 3D intraoral scanning and AI diagnostics. You see your expected result before treatment begins — not after.

Non-surgical solutions for complex bites

Using the Smartee S8-SGTB, ACAOO corrects Class II overbite and overjet cases that were previously considered surgical-only — without jaw surgery.

Central CBD location — DentalMonitoring reduces visits

World Square is central for all of Sydney. And with AI remote monitoring, patients need fewer in-clinic appointments — saving time without sacrificing specialist oversight.

Cases others won't take

Complex cases, medically compromised patients, adults told it’s too late, and patients seeking a surgical second opinion are all welcome at ACAOO.

FAQ

Questions about our World Square clinic

The most common questions patients ask before visiting ACAOO at World Square, Sydney CBD.

Do I need a referral to book a consultation at ACAOO?

No referral is required. You can book directly or by calling (02) 9261 2121. We also welcome GP, dentist, and specialist referrals.

Is ACAOO a specialist orthodontic practice or a general dental clinic?

ACAOO is a specialist orthodontic centre — not a general dental practice. Dr. Gareth Ho is a dual-qualified Specialist Orthodontist, registered with the Dental Board of Australia in both Orthodontics and Paediatric Dentistry.

Does ACAOO treat children and teenagers, or only adults?

ACAOO treats patients of all ages. Since 2025, the clinic has welcomed children, teenagers, and adults. Dr. Ho’s dual postgraduate qualification in both Orthodontics and Paediatric Dentistry means the practice has specialist expertise across every age group.

Can ACAOO treat complex orthodontic cases or surgical patients?

Yes — this is a core part of ACAOO’s identity. Dr. Ho accepts complex cases including severe Class II malocclusion, surgical orthodontics, medically compromised patients, and patients seeking a specialist second opinion before jaw surgery.

Is parking available near the World Square clinic?

Yes. World Square has its own car park, accessible from Goulburn Street. Wilson Parking on Pitt Street and additional CBD car parks are within a short walk. Given the clinic’s proximity to Town Hall and Central stations, public transport is often the most convenient option.

Visit us at World Square, Sydney CBD

Book a consultation with Dr. Gareth Ho at our specialist orthodontic centre in World Square. 3D AI assessment, honest diagnosis, no obligation to proceed.