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Biologic & Holistic Dentistry | SMART Mercury Removal | Zirconia Implants | LANAP Laser Therapy | Sleep & TMJ

Gateway Biologic Dentistry

720 S River Rd Ste b-210, St. George, UT 84790, USA

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

Root-cause, not symptom-chasing The team looks past the immediate concern to the patterns underneath it, from chronic headaches and inflammation to sleep and airway issues. You leave with an understanding of why, not just a quick fix. Metal-free and biocompatible by design From SMART-certified mercury removal to zirconia ceramic implants and mercury-free restorations, the materials used here are selected to work in harmony with your body, not against it. Advanced technique, gentler experience LANAP laser therapy and the scalpel-free Chao Pinhole Technique make procedures that were once invasive far more comfortable, with faster healing and less downtime.

Dr. Andy Mohlman

Dr. Matthew Geddes

DDS

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Dr. Andy Mohlman is a LANAP-certified and Chao Pinhole-certified dentist specializing in regenerative and laser periodontal care, with more than 20 years of clinical experience. He co-leads Gateway Biologic Dentistry, focusing on laser periodontal therapy, tissue regeneration using PRF (Platelet-Rich Fibrin), and advanced implant procedures. After graduating from The Ohio State University, Dr. Mohlman spent nearly 15 years refining his craft in Kennewick, Washington, developing deep expertise in implant surgery and laser procedures. His focus on regeneration grew from a simple observation: the body wants to heal. By combining PRF therapy, laser precision, and biocompatible materials, he helps patients achieve outcomes that work with nature rather than against it. His expertise spans 3D cone-beam guided implant placement, FDA-cleared LANAP laser therapy for periodontal disease, the scalpel-free Chao Pinhole Technique for gum recession, bone grafting and PRF for socket preservation, and tongue-tie treatment for infants, children, and adults. Dr. Mohlman and his wife Rachel are raising six children, with family, faith, and lifelong learning at the center of their lives. Drawn to the sunshine and red rock landscapes of St. George, he enjoys hiking and spending time with his growing family.

DDS, ICOI Fellow, AOS Fellow

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Dr. Matthew Geddes is an ICOI Fellow and SMART-certified biologic dentist with more than 18 years of experience in ceramic implant placement, safe amalgam removal using the IAOMT SMART protocol, and root-cause dental diagnosis. He co-leads Gateway Biologic Dentistry, one of Southern Utah's only practices dedicated entirely to whole-body focused dental care. After years of traditional practice, Dr. Geddes began noticing what his training had not prepared him for: patients with chronic headaches, sleep issues, and systemic inflammation that pointed to something beyond the mouth. His study of sleep medicine and airway dysfunction beginning in 2018 transformed how he practices dentistry. Today, guided by why rather than simply what, he offers unhurried, comprehensive evaluations across zirconia implants, airway and sleep medicine, TMJ and bite dysfunction, and the oral-systemic connections linking gum health to whole-body wellness. Raised in Ogden, Utah, Dr. Geddes and his wife Sharlyn are raising six children, with family, faith, and outdoor adventure at the center of their lives.

SMART Protocols

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Before & Afters

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720 S River Rd Ste b-210, St. George, UT 84790, USA

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