Dr. Guillermo Contreras | Dental Prosthesis | Oral Rehabilitation

Contact Details

Request Appointment

At the Clinic

Procedures and Treatments:

Dental Implants
Crowns of porcelain or zirconia
Complete and partial removable dentures
Maxillofacial prosthetics
Teeth whitening
Endodontics – root canals
Restorative dentistry
Enamel shaping
Bone grafts
Gum grafting

Doctor's Profile

Dr. Guillermo Contreras is well-known in Guatemala as the prosthodontist who successfully treats the most complex dental restorations that may be beyond the skills of most normal dentists. He is highly experienced in restoring and replacing teeth after a traumatic injury, as well as creating new smiles for children born with facial deficits. He is an expert at correcting delicate and complicated dental abnormalities from a medical and artistic point of view to the 100% satisfaction of the patient.

When internal and cardiac surgeons require a dental exam to rule out any possibility of oral infection or disease prior to surgery, they call on Dr. Contreras to perform the oral investigation, as he is professionally certified and experienced in this field. His findings and reports will support the surgeons’ decisions, to assure the best possible outcome for a successful procedure.

Choosing to have dental implants is a substantial investment and requires serious consideration. Dr. Contreras believes in empowering patients to make their own informed choices, so he patiently and honestly explains how they choose the highest quality and get the best value for their money. Dental Design collaborates with the best manufacturers, like Keystone Dental, with advanced biomaterials, or Nobel Biocare (The Titan of Titanium), to be sure of long-term satisfaction and reliability.

Dr. Contreras warns patients: “Some other clinics offer lower prices because the titanium used in the implant has contaminated, so they don’t integrate well and could cause a serious infection deep in the bone.” Implants from Korea, China, or Brazil could be softer, and prone to breakage and infection. At Dental Design, the highest quality implant package, including titanium implant, surgical procedure, healing cap, abutment, and a permanent porcelain crown is Q13,000 or about US$1800.

Dr. Contreras understands and communicates with his patients about how poor oral health can directly affect the entire body. For example, strep bacteria in the mouth can travel to cartilage and joints. Rheumatic fever can deposit the bacteria in scars causing life-threatening disease. In diabetic patients, infections in dental cavities and roots can be more aggressive and need to be controlled to maintain a consistent treatment plan.

With the high-tech capabilities of the Dental Design clinic, Dr. Contreras can perform a molar extraction with an immediate replacement on the same day. There are only four dentists in Guatemala City able to offer such fast and safe results. With a state-of-the-art 3-D scanner on-site in the clinic, they are able to take the digital image at the Dental Design clinic, then send it overnight to Sweden to have the abutment and crown custom-made in zirconia or other materials.

As a member of the Academy of Osseointegration and a highly experienced implantologist with over 6,000 dental implants placed, Dr. Contreras has the special skills needed to complete oral assure health and to restore smiles to the best they can be – both beautiful and functional.

Professional Affiliations

Canadian Healthcare Council, Ottawa Canada

  • Certified Status by the Dental Committee, 2017-2018

Agexport, Guatemalan Exporters
TheGuatemalan Association of Exporters

  • Dental Design – Exporter of the year, services sector. Second Place Award
  • Dental Design – “Services Exporter of the Year” 2nd place award in 2016

On September 22, 2016, Agexport, the Guatemalan Association of Exporters, held a gala ceremony at the Westin Camino Real Hotel to recognize the most respected highly examples of world-class exporters operating in Guatemala today. Read the article

The judges considered the export quality of service providers in various categories including medical care, technology, and sustainable tourism. All of them are outstanding in their contributions to innovation, service excellence, and technology. Dental Design (Dr. Contreras and Dr. Alfaro) won second prize in recognition of their dedication to generating robust trade with domestic and foreign companies or individuals.

Guatemalan Association of Oral and Maxillofacial
Guatemalan Association of Oral and Maxillofacial Prosthetics
Active Member
Past President

Academy of Osseointegration (AO)
The premier international association for professionals interested in implant dentistry. AO serves as a nexus where specialists and generalists can come together to evaluate emerging research, technology, and techniques; share the best information; and coordinate optimal patient care using timely, evidence-based science and methods.
Active member

Accreditation Association for Ambulatory Health
Care (AAAHC)
Fully accredited in the global sector for the practice of dental treatments and procedures.

Academic Affiliations

Andrés Bello University, Santiago, Chile

  • Master’s Degree in Implantology Oseointegrada, Master in Osseointegrated Implantology, 2005

Brenemark Osseointegration Center, Santiago, Chile

  • Specialty in Osseointegrated surgery, 2001

University of Chile, Santiago, Chile

  • Specialty in Oral Rehabilitation, Specialty in Oral Rehabilitation, 2000.

Francisco Marroquin University, Guatemala City, Guatemala

  • Graduated from Dentist Surgeon, Medical Degree in Dental Surgery, 1998.

Digital Smile Design

  • Certified in Technical Systems.


Dental Design Guatemala
Customer testimonial
Testimony | Mrs. Margarita Cardwell
Local news interview with the team at Dental Design



“Guatemala, a destination for health and well being” Prensa Libre news article featuring Dental Design Guatemala. Published 9th June 2016.

Special Interests

Dr. Guillermo “Willy” Contreras of Dental Design is one of the four importers of dental implants to Guatemala and owns the largest inventory of grade A+ implants, including the Keystone brand. Keeping quality material standards high, they carry only the best implants available from Europe and the United States.

Implants are used to replace a missing root, filling the space of a lost or extracted tooth. Implant crowns can last 10-15 years, so easy access for removal and replacement is important. Dentists concerned for the long-term maintenance do not generally cement crowns in place, as they should be screwed into the implants, being easier to remove, evaluate and replace if necessary.

A permanent bridge can appear the same as implants to replace missing teeth, but with no replacement for the root, the void under the gums will invite bone loss and structural instability.

For the benefit of international patients with limited time in Guatemala, Dr. Contreras can perform the first three procedures of an implant all at one time, with no healing time in between.

Come back soon to read more about the latest treatment methods that this doctor finds most interesting.


We are Denis and Marie Laurin from Montreal, Quebec, Canada. We traveled to Guatemala in 2009 and some friends recommended us to the Dental Design clinic in Guatemala City. We made the appointment from home so it was a very easy process.

When we arrived at the clinic we received a warm welcome from the doctors and its staff, we found a clinic that works with high technology. At the end of the day, we established our next appointments for the next 10 days and they gave us the costs for the next treatment.

We had root channel treatment, a new crown, and a new partial. All the work was done very professionally and the price we agreed on was respected.

We strongly recommend the Dental Design clinic, because we were very satisfied with the work and the treatment we received.

The clinic is located in zone 10 of Guatemala City, a very safe zone, with hotels and restaurants near.

Best regards
Denis et Marie Laurin, Montreal, Canada

I had an excellent experience at Dental Design, very kindly service and excellent work, the best work I can get in Central America right now.

I got some root canal treatments, crowns, cleaning and all of them were excellent. The service I received was a world-class service, and it compares to the best clinics I’ve ever seen in North America.

Absolutely I will come back and recommend Dental Design to everyone from the United States, Canada, or Europe.

Best regards,
Sylvain, Montreal, Oct 2016

My experience at Dental Design was absolutely fantastic, I feel absolutely fantastic when I come here. I had all my teeth removed and I had prosthetics on the lower and upper with implants, it is working very well I can eat whatever I want to.

Absolutely I will recommend Dental Design.

Thank you very much to Dr. Contreras.

Peter Yates, California, Sept. 2016

Just wanted to thank you again for all you do! We had a really great experience with everything in Guatemala! I have referred Guatemala Medical Travel and the dentists (Dr. Contreras and Dr. Alfaro) to several people already, including my parents, who just may be coming for periodontal cleanings! After having the first phase of the implants, I’m feeling great! I’m having minimal pain but under control with meds and I slept fine. I’m doing great –  All in all, everything is better than expected!

From Jim and Laura Thornburgh, July 2016

Dental Design is the best dental clinic I have ever been to in my life, the treatments the doctors did to me were more than OK, way beyond good, excellent.

All the personnel of the clinic treated me like a very important person, I got a lot of personal attention which I really appreciated. All the service process is really good, and everything that I needed was done perfectly.

For sure I will recommend Dental Design and I’ll be coming back. Guatemala is a great country and a lot of people are surprised about the sophistication of medical services that are provided.

The process to come here to medical service is easier if you got a coordinator, but the personnel here at the clinic are also very helpful.

Kind regards,
JoAnna, North Carolina, June 2015

Charity, Public Service, Donations

Public service and caring for the less fortunate is a way of life in the Latin culture.

Most visitors to the lovely village of San Juan la Laguna at Lake Atitlan see hard-working farmers, organized shopkeepers, and creative visual artists. However, Dr. Contreras sees groups of young and old people in need of extensive dental care that would not be available to them due to the cost and distance.

Together with “Dentists With Hearts”, a medical group from Vancouver, Canada, Dr. Contreras was instrumental in creating the San Juan Dental Clinic. International donations provided $8000 to build the clinic, and to hire dental students from San Carlos University to supervise the daily operations.

Dr. Contreras and other dental specialists volunteer their time every year to provide necessary dental care to Guatemalans in need. As a result, every resident of the village of San Juan is grateful for their continued oral health with the best dental specialists. It certainly shows in their smiles!