Youn Sagong, D.D.S.
Doctoral Education
UCLA: Doctor of Dental Surgery
Yale: Residency, Oral & Maxillofacial Surgery
Yale: Chief Resident, Oral & Maxillofacial Surgery
Affiliations
UCI Medical Center – Assistant Clinical Professor
Long Beach Medical Center
Miller Children’s Hospital Long Beach
Hollywood Presbyterian Medical Center
Biography
Dr. Youn Sagong is an Oral & Maxillofacial Surgeon. He grew up in Southern California and attended UC San Diego for his undergraduate studies. Dr. Sagong graduated with Bachelor of Science in Biology.
He then continued his graduate dental education at UCLA School of Dentistry, where he obtained his Doctor of Dental Surgery Degree.
With Dr. Sagong’s passion for surgical procedures and high academic achievement, he completed a residency training program in Oral and Maxillofacial Surgery at Yale Medical Center, the flagship training center for Yale University, School of Medicine in Connecticut. He excelled in all aspects of his training including Oral & Maxillofacial Surgery, General Surgery, Anesthesia, Emergency Medicine, Head & Neck Cancer Surgery, and Plastic & Reconstructive Surgery.
Dr. Sagong has special interest in complex surgical care of facial trauma, orthognathic (reconstructive jaw), bone grafting, and dental implant patients. He currently practices full-scope Oral & Maxillofacial surgery practice where he can fully utilize all of his skills to provide a compassionate & best possible surgical care in a comfortable setting. Dr. Sagong holds a General Anesthesia Permit in addition to his certification to practice Oral & Maxillofacial surgery.
In addition to practicing at Maxillofacial Surgery Institute – Irvine, Dr. Sagong performs complex Oral & Maxillofacial surgeries in Long Beach Memorial Medical Center and UC Irvine Medical Center.
In his spare time, Dr. Sagong enjoys playing sports, exercising, traveling, and spending time with his family.
Andrei Marechek, MD, DDS
Doctoral Education
University of California, Los Angeles: Doctor of Dental Surgery
Case Western Reserve University: Doctor of Medicine
University Hospitals: General Surgery
Case Western Reserve University: Residency, Oral & Maxillofacial Surgery
Perenack Aesthetic Center – AACS Facial Cosmetic Surgery Fellowship
Affiliations
UCI Medical Center – Assistant Clinical Professor
Long Beach Medical Center
Miller Children’s Hospital Long Beach
Hoag Hospital
UCLA Department of Oral and Maxillofacial Surgery– Part-Time Clinical Faculty
Biography
Dr. Marechek began his academic journey with undergraduate studies at the University of California, San Diego. He subsequently earned his Doctor of Dental Surgery (DDS) degree from the University of California, Los Angeles (UCLA) School of Dentistry, followed by his Doctor of Medicine (MD) degree from the Case Western Reserve University School of Medicine.
Following medical school, Dr. Marechek secured his top-choice residency placement at Case Western Reserve University. This rigorous five-year program focused solely on facial surgery. Throughout his training, he served as a resident physician at University Hospitals and MetroHealth Medical Center—both demanding Level I trauma centers—where he acquired extensive experience in complex post-traumatic facial reconstruction.
His residency also included valuable time at the world-renowned Cleveland Clinic, providing exposure to some of the most intricate and challenging cases in facial surgery. To further deepen his expertise in aesthetic procedures, Dr. Marechek committed to an additional fellowship focused exclusively on facial cosmetic surgery, gaining comprehensive training in advanced surgical techniques.
Now based in Orange County, California, Dr. Marechek maintains a practice with operating privileges at Hoag Hospital and UCI Medical Center. His clinical focus includes facial aesthetic surgery, facial recontouring, temporomandibular joint (TMJ) surgery, and corrective jaw (orthognathic) surgery. Dr. Marechek is committed to advancing his field through ongoing refinement of techniques, demonstrated by his contributions to peer-reviewed research and surgical textbook chapters. Furthermore, he actively participates in educating the next generation of surgeons, holding clinical faculty appointments at both UCI Medical Center and the UCLA Department of Oral and Maxillofacial Surgery.
Outside of his professional commitments, Dr. Marechek enjoys an active lifestyle with pursuits like climbing, spearfishing, surfing, and sailing. He is a dedicated father who cherishes time spent with his family and their dog.
