Meet Our Doctors

All professionals at Peak Dental Specialists maintain the highest levels of accreditation and pursue ongoing education to stay abreast of the latest trends in the dental field. Read on to learn more about our doctors' experience and training.

  • Tony Li
    DDS, MD
    Oral Surgeon

    Dr. Tony Li grew up on the peninsula in Northern California in the city of Belmont. He attended college at UC Berkeley studying molecular biology. Dr. Li then attended UCSF School of Dentistry and graduated in 2008. He subsequently moved to the east coast and completed a 6 year integrated Oral & Maxillofacial Surgery Residency/MD program at the University of Pittsburgh in Pittsburgh, Pennsylvania. He graduated medical school in 2012 and completed surgical residency in 2014. Dr. Li then completed a fellowship in Cranio-maxillofacial trauma at Legacy Emmanuel Hospital in Portland, Oregon in 2015.

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  • Robert Keshishian
    DDS
    Exodontist - Oral Surgery

    Southern California raised, Dr. Keshishian attended California State University - Northridge for his undergraduate degree in Biology with a sub-speacialty in Cell and Molecular Biology. Upon completion, he matriculated into Herman Ostrow School of Dentistry of USC's Doctor of Dental Surgery program
    During his time at USC, Dr. Keshishian served as Vice President of the Oral Surgery selective program as well as participating in the Special Patients elective clinic where he treated medically complex patients. 

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  • Thaer Alqadoumi
    DDS, MS
    Periodontist

    Dr. Alqadoumi earned his first DDS degree from the University of Jordan in 2012, followed by another DDS degree from Loma Linda University in 2016.

    He then completed his post-graduate training in Periodontics and Implant Surgery at Loma Linda University, where he received his MS degree.

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  • Michael Lee
    DMD
    Orthodontist

    “Nothing gets me more excited than seeing a patient view their new smile for the first time after treatment is completed. It is truly a pleasure being able to meet and establish lifelong connections with so many people from different walks of life while transforming their smile.

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  • Taoheed Johnson
    DMD
    Endodontist

    Dr. Johnson grew up in Los Angeles where he attended USC for college. He then ventured to the East Coast to attend Tufts in Boston for dental school. Afterwards, he completed a general practice residency in the Bronx and was fortunate to become the chief resident for the second year. He decided to stay and work in New York City for another year thereafter. Ultimately, he pursued his Endodontic residency in Los Angeles at USC dental school. Dr. Johnson loves dentistry and Endodontics because it is challenging and rewarding to be of service to people. Mostly, he likes using his hands to work and he feels like it is a blessing to get the opportunity! He has been a dentist for 13 years and is excited to be a part of this team. In his spare time, he loves exploring other cultures, travelling and generally being active.

  • Ladan Matin
    DDS
    Endodontist

    Dr. Ladan Ziaie Matin, DDS, graduated from the Advanced Endodontics Program at the University of Southern California (USC) in 2020. Before specializing in Endodontics, she practiced general dentistry focusing on Endodontics. She obtained her DDS certificate overseas. Dr. Matin practices endodontics in Southern California and is a volunteer faculty member at USC. She currently resides in Los Angeles and enjoys reading, hiking, swimming, traveling, and spending quality time with her family and friends.

    Dr. Ladan Matin is a member of the following organizations:

    American Association of Endodontists
    American Dental Association
    California Dental Association

  • Yara Arnouk
    DDS, MICOI, MAAIP
    Managing Dentist

    Dr. Yara Arnouk, a distinguished graduate of Loma Linda University, School of Dentistry, embarked on her journey into implant dentistry early in her educational pursuit. Her fervor for this field was ignited when she was handpicked as one of the elite trio from her graduating class to partake in the prestigious Loma Linda Implant Continuum immediately following graduation.

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  • Dr.
    James Jun
    DMD, MS
    Periodontist

    Dr. James Jun, DMD – Periodontist Education: Tufts University School of Dental Medicine, MA 

    Dr. James Jun has been practicing dentistry since 2006 and is a board-certified periodontist—a dental specialist focused on the prevention, diagnosis, and treatment of periodontal (gum) disease, as well as the placement of dental implants. He has extensive expertise in treating oral inflammation and managing complex periodontal cases, including those involving severe gum disease or patients with challenging medical histories. 


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Contact Us

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COME VISIT GLENDORA'S PREMIER DENTAL SPECIALTY GROUP

Office Location:

210 S Grand Ave, Suite 308 Glendora, CA 91741

Hours of Operation:

Peak Dental Specialists is open five days a week. Our hours of operation are:

Monday:

8:00 am-5:00 pm

Tuesday:

8:00 am-5:00 pm

Wednesday:

8:00 am-5:00 pm

Thursday:

9:00 am-6:00 pm

Friday:

7:00 am-4:00 pm

Saturday:

Closed

Sunday:

Closed