Meet Our Dental Providers

Dzien Nguyen, D.D.S

General Dentist 

Dr. Nguyen (better known as “Dr. Z") was first drawn to dentistry after volunteering at the UCLA Dental Clinic as an undergraduate. He loved the level of detail and manual dexterity involved with the profession, and was amazed by how much impact a simple dental procedure could have on someone’s life. He also certainly empathizes with patients having dental fears – he admits to having nightmares himself about bad things happening to his teeth! Accordingly, Dr. Z works closely with his patients to understand their dental priorities, educate them on oral hygiene and maintenance, and achieve the goal of having them leave the office with a healthier mouth. Esthetic and Cosmetic Dentistry are his areas of specialty.

Dr. Z received his D.D.S. degree from New York University. He is affiliated with both the ADA and the CDA, and he is fluent in Vietnamese. Outside the office, he has a variety of interests, including playing basketball, watching movies, traveling, and producing music.


B.S., Psychobiology – UCLA
D.D.S. – New York University


American Dental Association; California Dental Association, Orange County Dental Society

Manreet Pannu, DDS

General Dentist

Dr. Pannu says, “I love helping people smile, and it is a great pleasure to interact with my patients and help them to get the smile they will love! I believe in providing outstanding dental care to my patients, and encourage them to be involved in their treatment in order to achieve the best results possible.” Dr. Pannu realizes that your oral health has a profound impact on your overall well-being.

After graduating from Modi College, Dr. Pannu received her Dental Degree from the Guru Nanak Dev Dental College in India. She received additional training in Operative & Esthetic Dentistry at the Boston University School of Dental Medicine. She also speaks Hindi and Punjabi.

Dr. Pannu says, “Away from the office, I enjoy traveling and spending time with my wonderful family.”


B.S., Pre-Dental–Modi College
D.D.S.–Guru Nanak Dev Dental College, India
Operative & Esthetic Dentistry-Boston University School of Dental Medicine

Bassem Alkatib, D.D.S


Bassem Alkatib completed his dental studies at the University of Southern California Dental School, in 2007. He then continued on at USC to receive his certificate in Endodontics and graduated from his training in 2009. He was on the Dean’s list during his studies and received an Honorary Award from the American Academy of Osteointegration for being the best in his class in implant training. Dr. Alkatib is also an internationally trained Oral Surgeon. Because of his dual training, he has a special interest in Surgical Endodontics.
Dr. Alkatib is a professional swimmer and enjoys hiking and spending time with his wife and three children. During his free time, he also enjoys cooking, and traveling to different countries to learn new recipes. He is a member of the American Dental Association, California Dental Association, and Tri-County Dental Society.


D.D.S. - USC
Certificate, Endodontics - USC


American Dental Association; California Dental Association; Tri-County Dental Society

Mohamed Hassan, D.D.S


Dr. Hassan  says, “As a Periodontal Specialist, I enjoy providing my patients with thorough evaluations and informative solutions. I help them decide for themselves what is ultimately in their best interest. These choices can have a very positive impact on peoples well-being.” Dr. Hassan feels that building a foundation of trust by treating his patients as special individuals is vital. He understands how uneasy some patients may feel about their dental visits, and how he can make a difference in providing a relaxing and comfortable experience.

After graduating from the Alexandria University Faculty of Dentistry, Dr. Hassan received his Dental Degree and his Periodontist Certificate from the Herman Ostrow School of Dentistry of USC. He is a Diplomate of the American Board of Periodontology. He also speaks Spanish and Arabic.

Away from the office, Dr. Hassan likes to unwind by reading and jogging.

B.S., Dentistry–Alexandria University Faculty of Dentistry
D.D.S.–USC School of Dentistry
Periodontist Certificate–USC School of Dentistry

Diplomate of the American Board of Periodontology

Arthur Johnson, D.D.S

Oral Surgery

Dr. Johnson practices the full scope of Oral and Maxillofacial surgery, including dentoalveolar surgery, orthognathic surgery, facial reconstruction, obstructive sleep apnea, as well as facial cosmetic surgery. He is especially interested in dental implants, with 10 years of experience using 6 different systems. His attention to detail and philosophy of providing optimal, quality care with the least amount of invasive surgery has earned him trust from patients and confidence from referring doctors.

He received his D.D.S. from The University of Michigan. After completing a General Residency Program at Johns Hopkins Hospital Dr. Johnson attended the University of Pennsylvania School of Medicine where he earned his Medical Degree in 1998.

Dr. Johnson volunteers with Health Care International where he provides medical and dental care to the undeserved regions of Jamaica. He’s a member of many organizations including the American Board of Oral and Maxillofacial Surgery and the California Association of Oral & Maxillofacial Surgeons.

In his free time he enjoys travel and relaxing at the beach.


D.D.S–The University of Michigan
M.D.–University of Pennsylvania School of Medicine


Diplomate-American Board of Oral and Maxillofacial Surgery American Association of Oral & Maxillofacial Surgeons California Association of Oral & Maxillofacial Surgeons California Medical AssociationAmerican Dental Association


Taylor Olsen, D.D.S. M.S.D


Dr. Olsen says, “I love working to help people increase their self-esteem and to smile more confidently.” He feels that building a foundation of trust by treating his patients as special individuals is vital. He understands how uneasy some patients may feel about their dental visits, and how he can make a difference in providing a relaxing and positive experience that result in an amazing smile.

Dr. Olsen received his B.S. in Microbiology, Immunology and Molecular Genetics from UCLA and his D.D.S. from the UCLA School of Dentistry. He was awarded his M.S.D. and Orthodontic Certificate from the University of Washington. He is a member of many organizatons including the American Association of Orthodontists and the Pacific Coast Society of Orthodontists. Dr. Olsen is also fluent in Spanish.

In his free time Dr. Olsen relaxes with his family. He enjoys surfing, snow skiing, hiking and the Piano.


B.S., Microbiology, Immunology and Molecular Genetics–UCLA
D.D.S.–UCLA School of Dentistry
M.S.D., Orthodontic Certificate–University of Washington


American Association of Orthodontists Pacific Coast Society of Orthodontists American Dental Association California Dental Association Orange County Dental Society The Crown Council


Bobby Soleiman, D.D.S


With over ten years of practice in Periodontics, Dr. Bobby Soleiman takes great pride in his work as a dental specialist. He consistently strives for perfection and never compromises on the care taken and delivered to his patients. Because each patient has individual needs, he makes sure to provide tailor-made solutions and education. Dr. Soleiman also complements his treatments with multiple forms of sedation – such as Oral, Nitrous Oxide, and IV Sedation – to make his patients’ visits as painless and comfortable as possible.

Dr. Soleiman received his D.D.S. degree from the University of the Pacific Dugoni School of Dentistry. He went on to focus his skill set on his chosen specialty through the Advanced Education in Periodontics and Implant Dentistry program at Loma Linda University School of Dentistry. During his studies, his academic work garnered him induction into the Tau Kappa Omega and Omicron Kappa Upsilon Dental Honor Societies. He was also selected as the recipient of the American Academy of Periodontology Award for Outstanding Achievement in Periodontists.

Currently, Dr. Soleiman remains active with his peers through his membership to professional organizations such as the California Periodontal Society and the American Dental Association. Outside of his practice, he enjoys basketball, working out, watching movies, and camping with his family. He and his wife have three children.


D.D.S. – University of the Pacific Dugoni School of Dentistry
Certificate, Periodontics – Loma Linda University School of Dentistry


American Academy of Periodontology; American Dental Association; California Dental Association; California Periodontal Society; Tri-County Dental Society



About Gentle Dental Irvine

While other dentists will tell you they have reached the pinnacle of dentistry, only Gentle Dental Irvine has the expertise and artistry that modern dentistry demands. At Gentle Dental Irvine our dedicated dentists will take the time to hear your dental concerns and will devise a personalized solution that fits your particular needs. Our compassionate and friendly staff will ensure your comfort at all levels and will make you their top priority. Gentle Dental Irvine dentists count on the latest state-of-the-art equipment, which allows them to stay at the top of a demanding modern dentistry.

At Gentle Dental Irvine, all our dentists feel proud to be members of the Irvine community and will actively participate in local events and make it their mission to care for the dental needs of all Irvine residents. Our devoted dentists are trusted for their exceptional skills and wide range of dental specialties, including cosmetic dentistry, regular examinations, professional cleanings, x-rays, veneers, sealants, fillings, crowns and bridges, teeth implants, dentures, root canals, teeth whitening, and braces and all aspects of general dentistry to make your smile a healthy and radiant smile.

What are you waiting for? A beautiful smile is only a phone call away. Call today to schedule your first appointment with your dentist.

Gentle Dental

4950 Barranca Parkway Suite 105
Irvine, CA 92604
Call: 949-988-0865
to schedule an appointment today

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Office Hours:

Monday8:00 AM to 5:00 PM
Tuesday10:00 AM to 7:00 PM
Wednesday8:00 AM to 5:00 PM
Thursday7:00 AM to 4:00 PM
Friday7:00 AM to 3:00 PM

New Patient Forms

Below are links to the new patient forms that you will be asked to complete during your first visit. Feel free to download them using the links below, and fill them out before your visit.

Adult New Patient Form (English)
Child New Patient Form (English)
Adult New Patient Form (Spanish)
Child New Patient Form (Spanish)