Hello, I am Dr. Mauricio Fonseca Diaz


Specialist in Oral and Maxillofacial Surgery and Traumatology




+506 2228-0141




  • Spanish: Native
  • English: Both written and spoken proficiency.
  • French: Basic Comprehension

Short Biography​

Dr. Fonseca finished his dentistry training at the Universidad Latina de Costa Rica in 2006. Following rhis he had a private practice in San Jose Costa Rica. In 2010, he was accepted for an Oral and Maxilo facial residency program in Buenos Aires Argentina at the Pontificia Universidad Catolica Argentina. He received his post grad degree in 2014 and spent one more year on specialty training under Dr Alfonso Venturelli, MD. DDS, OMFS, before returning to Costa Rica in 2015. Since then, he has been solely focused exclusively on private practice in oral Maxilo facial surgery, complex dental implants and facial deformities. In 2017, Dr. Fonseca attended a short term fellowship at the LMU University in Munich Germany, and from 2020 to 2023 Dr. Fonseca underwent a training program in aesthetic facial surgery by the American College of Maxilofacial Surgery.
When not in surgery, Dr. Fonseca enjoys spending time outdoors, along his three dogs and his friends. He enjoys the beach, trekking and traveling.


  • Post Graduate Studies
    Pontificia Universidad Católica Argentina, Buenos Aires (March 2010 – December 2013) Faculty of Medical Sciences.
  • Post Graduate Studies
    Pontificia Universidad Católica Argentina, Buenos Aires (March 2010 – December 2013) Faculty of Medical Sciences.
  • Specialization Program in Oral and Maxillofacial Surgery and Traumatology Residency Program
    Chief Resident (2013)
  • Universidad de Costa Rica. San José, Costa Rica (February 2016) Specialization Degree Equivalence #793-131.
  • Colegio Cirujanos Dentistas de Costa Rica (May 2016) Specialization Recognition Certification in Oral and Maxillofacial Surgery for Costa Rica.
  • LMU Klinik un Poliklinik für Mund-, Keifer- und Gesichtschirugie. Munich, Germany. (April – June 2017) AOCMF Center Fellowship program.
  • Graduate Studies Universidad Latina. San José, Costa Rica (January 2001 – April 2006)
  • Faculty of Dentistry
    Degree Granted: License Degree in Dentistry
    Professional Mention: Doctor in Dental Surgery
    Universidad Nacional de Rosario. Santa Fe, Argentina (September 2014)
    Faculty of DentistryOfficial Recognition and equivalence of Dental Degree in Argentina(Res. No. 472/2014)

Continuous Education 

  • ACOMS 15th Annual Hands-on Facial Cosmetic Surgery Course. American Association of Oral Maxillofacial Surgeons. Louisiana State University. New Orleans, LA. Feb 8-9, 2020.
  • International Symposium on Advanced Dentistry. Harvard School of Dental Medicine. Boston, MA. USA. June 3-5, 2019
  • ICOMS Rio. International Association of Oral and Maxillofacial Surgeons. Rio de Janeiro, Brasil. May 1- 4, 2019.
  • ICOI Central America Symposium. ICOI. San Jose, Costa Rica. Feb 28 – Mar 2, 2019.
  • BLS Basic Life Support (Recertification). February 21st, 2019. CIMA Hospital San Jose. Costa Rica.
  • Arnett Orthognathic Surgery Forum. January 23-26, 2019. Hilton Santa Barbara Beachfront Resort. California, USA.
  • Basic Periodontal – Implant Surgery Course. Seoul International University, School of Dentistry. December 2nd, 2018. Seoul, South Korea.
  • Comprehensive Implant Course. Global Academy of Osseointegration Training Center. GAO. December 1-3, 2018. Seoul, South Korea.
  • AOCMF Regional Masters Course—Challenges and Controversies in Orthognathic Surgery with Anatomical Specimens. Duration: 16h. Credits: 13. Depuy Synthes Training Facilities. Feb. 24-25, 2018. Palm Beach Gardens, FL.
  • Dr. Joseph Choukroun a-PRF e i-PRF Protocol. Duration: 8h. Credits: 6 (recertification CCDCR). Wyndham Garden Hotel. May 28, 2016. San José, Costa Rica.
  • Principles of Operative Treatment of Craniomaxillofacial Trauma and Reconstruction. AO North America. Duration: 16h. Credits: 13.25 AMA PRI Cat I. Sept. 10-11 2016. Rosen Shingle Creek Hotel. Orlando, FL. USA.

Work Experience 

  • Fonseca Maxilofacial, San José, Costa Rica. Private practice exclusive to oral maxillofacial surgery and high complexity implantology.
    Owner and Primary OMFS
    January 2015 to date
    Universidad Latina de Costa Rica. San José.
  • Clinical Practice Instructor for Oral Surgery and Exodontia.
    January 2021 – Present.
    Interdisciplinary Relationships II. ESPE-23.
  • Specialization in Endodontics. March 2018 – Present
  • Face & Jaw, Dr. Esteban Alvarado León.
  • Private Practice focused on DentoFacial Deformities.
    April 2015 – Present

Groups and Professional Associations

  • National Dental Association of Costa Rica (CCDCR). September 2006 – Present
  • National Dental Association of Argentina (AOA). 2010 – Present
  • Argentinian Society of Oral and Maxillofacial Surgery and Traumatology (SACyTBMF). 2010 – Present
  • Latin American Association of Oral and Maxillofacial Surgery (ALACIBU). 2012 – Present
  • International Association of Oral and Maxillofacial Surgery (IAOMS). 2012 – Present
    AO CMF 2011 – Present
  • Costa Rica Oral Maxillofacial Surgery Academy. 2016-present. Sitting Vice-President.
  • March 2019: CPR training endorsed by the AHA