Denta-Joy Thonglor is located on the second floor of Fifty Fifth Plaza, at the junction of Sukhumvit 55 Road and Thonglor Soi 2, Khlong Toei Nua Subdistrict, Watthana District, Bangkok 10110, Thailand. BTS Thonglor station on the Sukhumvit Line is approximately five minutes on foot from the clinic, accessible from Exit 3. Fifty Fifth Plaza is a commercial complex situated at the Thonglor soi entrance from Sukhumvit Road, in one of Bangkok's most established affluent residential and dining neighborhoods. The Thonglor location has served as the flagship branch of the Denta-Joy network since the practice's founding in 1983, more than 41 years ago. The network has since expanded to eight branches spanning Bangkok, Pattaya, and Phnom Penh, Cambodia, with additional Bangkok locations in Chaeng Wattana, Srinagarindra (Seacon Square), Pinklao, Ramintra, and Bangna.
Clinical Heritage and Founder
Denta-Joy was founded by Dr. Narandr Chevangkul, whose credentials place him among Thailand's most decorated orthodontists. He graduated with first honors from Mahidol University in 1982 and completed a Master of Science in Dentistry from Temple University in Pennsylvania in 1990. He holds the Diplomate credential from the American Board of Orthodontics (ABO), one of the highest levels of orthodontic certification recognized internationally and held by relatively few practitioners in Thailand. Dr. Narandr is a member of the Invisalign Asia-Pacific Advisory Board, reflecting his standing in the global clear aligner industry. He pioneered the introduction of lingual braces in Thailand in 1983, the same year Denta-Joy opened, and was the first dental provider in Thailand to begin offering Invisalign treatment in 2001. In 2019, Denta-Joy became the first clinic outside the United States to offer Brava by BRIUS, a newer clear aligner system developed in the United States. The specialist team across the network includes orthodontists, periodontists, endodontists, prosthodontists, oral surgeons, and pediatric dentists, with advanced degrees from international institutions including UCLA, Indiana University, and German dental faculties.
Invisalign Program
Invisalign clear aligner therapy is the practice's defining specialty. The clinic has treated more than 9,000 Invisalign cases, a volume recognized by Align Technology through multiple tiered provider awards: the first Black Diamond status in Thailand in 2014 (reflecting over 401 cases per year), the first Blue Diamond status in 2016 (751+ cases per year), and the first Red Diamond status in 2018 (1,000+ cases per year). Align Technology awarded Denta-Joy its Lifetime Achievement Award upon completion of 5,000 treated cases. The clinic was designated the Invisalign Flagship Clinic in Thailand from 2014 through 2022. This case volume means the orthodontic team has extensive experience with complex and borderline aligner cases that other providers might refer or not accept, and the clinic's iTero Element 5D digital scanning system captures near-infrared intraoral images without radiation for precise case planning and outcome tracking.
Orthodontic Systems
Beyond Invisalign, the orthodontic program covers Brava by BRIUS, a lingual aligner hybrid system; conventional metal and ceramic fixed braces; Damon self-ligating braces; and traditional lingual braces bonded to the inner tooth surfaces. The range across these systems allows the orthodontic team to match the treatment modality to each patient's case complexity, aesthetic preferences, and budget rather than being limited to a single brand or appliance category. Post-orthodontic retention is managed through retainers, with the Deara retainer system introduced in 2023 as an additional option in the post-treatment retention program.
Implants, Cosmetic, and Specialist Care
Dental implant placement and full restoration are available for single missing teeth and multi-tooth reconstruction cases, with oral surgery and prosthodontic expertise covering the complete treatment workflow. Porcelain veneer fabrication, smile design consultation, and professional teeth whitening cover the cosmetic dentistry range. Crown and bridge fabrication, and full and partial dentures, address restorative and prosthodontic needs. Root canal therapy in the endodontic program and periodontal treatment for gum disease management bring the specialist coverage to a comprehensive level. Pediatric dentistry serves younger patients with age-appropriate preventive and restorative care. Sleep apnea treatment and bruxism management through customized appliances address parafunctional and sleep-related conditions alongside the standard dental service range.
Quality Certification and Patient Services
Denta-Joy is ISO 9001:2015 certified, recognized as the first aesthetic dental clinic in Thailand to achieve this quality management system certification from NQA. The certification covers organizational quality management processes, patient safety protocols, and service delivery standards across the network. For international patients, the clinic offers English and Chinese language support, flexible payment plans, and a complimentary airport or hotel pickup service for patients arriving from abroad for dental treatment. Free parking is available at the Thonglor location. The clinic is open daily from 9:00 in the morning to 8:00 in the evening. Appointments can be arranged by phone at +66 86 320 5693 or the general line +66 2 789 3033, by email at [email protected], or via LINE at @dentajoy for English speakers or @dentajoy.eng for English-language-specific inquiries.
