Gateway Biologic Dentistry is one of Southern Utah's only practices dedicated entirely to whole-body focused dental care. Led by Dr. Matthew Geddes and Dr. Andy Mohlman, the St. George practice was built on a simple belief: your mouth is part of a living system, and the best dentistry honors your body's natural design rather than working against it.
From subtle enhancements to complete smile transformations, every treatment is crafted with precision and an unwavering commitment to your overall health. The practice is mercury-free, biocompatible, and SMART-certified, pairing advanced surgical and regenerative expertise with materials chosen to work in harmony with your system. Dr. Geddes brings advanced training in ceramic implant placement, safe mercury removal, and airway and sleep medicine, while Dr. Mohlman leads minimally invasive laser gum therapy, periodontal regeneration, and PRF-supported healing.
Whether you are seeking safe amalgam removal, a metal-free restoration, relief from airway or TMJ concerns, or a complete return to oral-systemic balance, the team at Gateway treats the root cause rather than the symptom, in a setting built around your comfort and your long-term wellness.
Services & Specialties
Biologic & Holistic Dentistry | SMART Mercury Removal | Zirconia Implants | LANAP Laser Therapy | Sleep & TMJ
Airway & Sleep
Sleep Apnea Treatment / Oral Appliance Therapy
TMJ Therapy
Airway Screening
Biocompatibility
Material biocompatibility testing
Fluoride-free materials
Biologic Cosmetic & Esthetic Care
Cosmetic Dentistry / Smile Makeovers
Teeth Whitening
Veneers
Clear Aligners
Exams & Prevention
Exams & Cleanings
Preventive Treatment / Periodontal Maintenance
Advanced Diagnostics, reduced radiation / Digital X-rays
CBCT 3D Imaging
Family Dentistry
Regenerative & Biological Therapies
Platlet Rich Fibrin (PRF)
Ozone Therapy
Oral Surgery & Extractions
Periodontal & Soft Tissue Therapy
Periodontal Regeneration
Bone Grafting
Platelet Rich Fibrin (PRF)
Ozone Therapy
Oral Surgery / Extractions
LANAP Laser Gum Treatment
Laser Surgery, Soft Tissue Applications
Biologic Extractions, with socket preservation
Removal of Failed Root Canals
Cavitation Evaluation and Remediation
Ozone Therapy (gum irrigation, disinfection, surgical support)
Restorative & Prosthetics
Zirconia / Ceramic Implants
SMART Mercury Amalgam Removal
Dental Crowns
Bridges
Dentures
Composite / BPA-free Fillings

Why Gateway
Dr. Andy Mohlman
Dr. Matthew Geddes
DDS

DDS, ICOI Fellow, AOS Fellow

SMART Protocols
Office Photos
Before & Afters
Call
Visit
720 S River Rd Ste b-210, St. George, UT 84790, USA

