Medical Board of Excellence

Dr. Andrew McAllister is one of Australia's most experienced implantologists, with 29 years of focused clinical practice in dental implant surgery, full-arch reconstruction, and complex oral rehabilitation. Based in Brisbane, he has built a career defined by precision surgical technique and a commitment to evidence-based implant protocols.

After graduating from the University of Queensland, Dr. McAllister pursued advanced postgraduate training in oral rehabilitation at the University of Melbourne, where his research focused on occlusal loading patterns in implant-supported prostheses. He went on to earn his FRACDS and later completed a fellowship with the International Congress of Oral Implantologists, cementing his credentials in the global implant community. In 2004, he spent a year at NYU's College of Dentistry completing advanced training in bone augmentation and sinus lift procedures under some of the most respected names in American implantology.

Over his career, Dr. McAllister has placed more than 15,000 dental implants and has completed over 900 full-arch All-on-4 and All-on-6 cases. He founded the Brisbane Implant Centre in 2001, which has grown into a multidisciplinary referral hub receiving complex cases from general dentists across Queensland and Northern New South Wales. The centre was among the first in Australia to adopt fully guided digital implant surgery using intraoral scanning, CBCT planning, and 3D-printed surgical guides.

Academically, Dr. McAllister served as a Senior Clinical Lecturer at the University of Queensland School of Dentistry from 2003 to 2016, where he supervised implant training for postgraduate students and ran a weekly implant seminar series. He has published 38 peer-reviewed articles in journals including Clinical Oral Implants Research, the International Journal of Oral & Maxillofacial Implants, and the Australian Dental Journal. He has been an invited speaker at over 70 international conferences, including the ITI World Symposium, the European Association for Osseointegration Congress, and the Asia Pacific Implant Dentistry Conference.

He holds active memberships with the Australian Dental Association, the Australian Osseointegration Society, the International Team for Implantology (ITI), and the Academy of Osseointegration. Dr. McAllister serves on SmileJet's Board of Excellence as the lead advisor on implant surgical standards, overseeing partner clinic evaluation for implant placement protocols, guided surgery adoption, bone grafting techniques, and long-term implant survival tracking across Vietnam, Thailand, and Mexico.

Dr. Karen Lim-Beaumont is a specialist endodontist based in Perth with 23 years of clinical experience in root canal therapy, endodontic retreatment, vital pulp therapy, and microsurgical endodontics. She is recognized across Australia as a leader in microscope-enhanced endodontics and has been instrumental in advancing minimally invasive techniques within the Australian endodontic community.

After graduating with honours from the University of Western Australia, Dr. Lim-Beaumont completed her specialist training at the University of Adelaide, where her doctoral research examined the efficacy of different irrigation protocols in eliminating biofilm from lateral canals. She went on to receive advanced microsurgery certification at the University of Pennsylvania under Dr. Kim's renowned endodontic microsurgery program, gaining expertise in MTA retrograde filling, ultrasonic root-end preparation, and microsurgical flap design.

Since establishing her referral-only endodontic practice in Perth in 2003, Dr. Lim-Beaumont has treated over 14,000 root canal cases, including more than 2,500 retreatments and 1,200 microsurgical apicoectomies. Her practice was one of the first in Western Australia to integrate dental operating microscopes for all endodontic procedures, and she has championed the use of CBCT imaging for diagnosis of complex root canal anatomy, vertical root fractures, and periapical pathology.

From 2006 to 2019, Dr. Lim-Beaumont held a position as Clinical Senior Lecturer at the University of Western Australia's School of Dentistry, where she taught in the postgraduate endodontic program and supervised clinical cases. She has published 24 peer-reviewed articles in the Journal of Endodontics, the International Endodontic Journal, and the Australian Endodontic Journal. Her ongoing research interests include regenerative endodontic procedures in mature teeth, the use of bioceramics in root canal obturation, and outcomes analysis of microsurgical retreatment.

She is a member of the Australian Society of Endodontology (ASE), the International Association of Dental Traumatology (IADT), the European Society of Endodontology (ESE), and the American Association of Endodontists (AAE). On SmileJet's Board of Excellence, Dr. Lim-Beaumont oversees root canal treatment quality benchmarks, evaluates partner clinic infection control and sterilization standards, and sets endodontic outcome criteria used in SmileJet's clinic verification process.

Dr. Robert Marchetti is a Harvard-trained restorative dentist and implant clinician based in Boston with 26 years of experience delivering comprehensive, full-mouth restorative care. His practice focuses on complex treatment planning that integrates implant surgery, fixed prosthodontics, occlusal rehabilitation, and cosmetic dentistry into cohesive, long-lasting treatment outcomes.

Dr. Marchetti's academic path began with a biomedical engineering degree from Boston University, which gave him an analytical foundation that distinguishes his approach to treatment planning and materials science. He then earned his DMD at Harvard School of Dental Medicine, followed by a General Practice Residency at Brigham and Women's Hospital, where he gained intensive hospital-based training in medically complex patients, trauma management, and interdisciplinary case coordination.

Rather than pursuing a single specialty, Dr. Marchetti followed the comprehensive restorative dentistry track, completing advanced training at both the Pankey Institute and Spear Education — two of the most respected postgraduate programs in the US for complex treatment planning and interdisciplinary restorative care. He earned his FAGD from the Academy of General Dentistry, a distinction held by fewer than 7% of US general dentists, and his FICOI recognizing advanced competence in implant placement and restoration.

Over his career, Dr. Marchetti has completed more than 3,200 full-mouth rehabilitation cases and placed over 6,000 dental implants. He founded Marchetti Dental Group in Boston's Back Bay in 2002, which now operates as a multi-provider comprehensive care practice with a dedicated in-house ceramics lab. His engineering background has made him an early adopter of digital workflows, and his practice has been fully digital since 2014, using intraoral scanning, digital design, and in-office milling for same-day restorations.

Academically, Dr. Marchetti served as a Part-Time Clinical Instructor at Harvard School of Dental Medicine from 2003 to 2013 and has been a visiting faculty member at the Spear Education campus since 2015. He has published 19 peer-reviewed articles in the Journal of Prosthetic Dentistry, the Journal of the American Dental Association (JADA), and Compendium of Continuing Education in Dentistry, with a research focus on long-term outcomes of implant-supported fixed bridges and the clinical performance of monolithic zirconia restorations. He has delivered over 50 continuing education lectures nationally.

He is a member of the American Dental Association, the Academy of General Dentistry, the American Academy of Implant Dentistry (AAID), and the American Academy of Cosmetic Dentistry (AACD). On SmileJet's Board of Excellence, Dr. Marchetti serves as the lead advisor on restorative quality standards, overseeing crown and bridge evaluation criteria, dental lab quality benchmarking, material selection guidelines, and comprehensive treatment planning review protocols across all partner clinics.

Dr. Catherine Reyes-Sullivan is a board-certified prosthodontist based in Chicago with 24 years of experience in fixed and removable prosthodontics, implant prosthetics, maxillofacial prosthetics, and digital dentistry. She is nationally recognized for her leadership in integrating CAD/CAM technology, digital smile design, and 3D printing into everyday prosthodontic workflows.

Born in Chicago to a Filipino-American family, Dr. Reyes-Sullivan developed her interest in dentistry through community health outreach programs during her undergraduate years at Northwestern. She earned her DDS at the University of Illinois at Chicago and then completed her prosthodontic residency at Indiana University, one of the oldest and most rigorous prosthodontic programs in the country. Her master's thesis investigated the marginal fit accuracy of CAD/CAM-fabricated zirconia frameworks compared to traditional cast metal substructures, research that would foreshadow her career-long focus on digital prosthodontics.

After earning board certification from the American Board of Prosthodontics in 2004, Dr. Reyes-Sullivan established her private practice on Chicago's Michigan Avenue, specializing in full-mouth reconstruction, implant-supported overdentures, and complex aesthetic rehabilitations. In 2010, she completed a digital dentistry fellowship at the University of Zurich's Center for Dental Medicine, studying under pioneers of the European digital prosthodontics movement. This experience positioned her as one of the earliest US prosthodontists to implement a fully digital clinical and laboratory workflow, from intraoral scanning through chairside milling and 3D-printed provisional restorations.

Over her career, she has completed more than 3,800 major prosthodontic cases, including over 600 full-arch implant-supported rehabilitations and 200 maxillofacial prosthetic cases for patients with congenital defects or post-oncology surgical deficits. She has served as an Associate Professor of Prosthodontics at the University of Illinois at Chicago College of Dentistry since 2008, where she directs the digital prosthodontics curriculum and co-founded the school's Digital Dentistry Research Lab.

Dr. Reyes-Sullivan has published 31 peer-reviewed articles in the Journal of Prosthetic Dentistry, the International Journal of Prosthodontics, the Journal of Dental Research, and the Journal of Prosthodontics. She has authored two textbook chapters on digital impression systems and 3D printing in prosthodontics. Her current research examines the accuracy and efficiency of fully digital workflows for full-arch implant prostheses and the integration of artificial intelligence into shade matching and tooth morphology design.

She holds memberships in the American College of Prosthodontists, the American Dental Association, the Academy of Prosthodontics, the Digital Dentistry Society, and the International Association for Dental Research (IADR). On SmileJet's Board of Excellence, Dr. Reyes-Sullivan leads the digital dentistry and prosthodontic standards division. She is responsible for evaluating partner clinic lab workflows, digital technology adoption, veneer and crown fabrication quality, and establishing prosthodontic outcome scoring metrics across SmileJet's clinic network.

Dr. William "Grant" Harrelson III is a dual-degree oral and maxillofacial surgeon based in Nashville with 27 years of surgical experience encompassing dentoalveolar surgery, orthognathic surgery, craniomaxillofacial trauma, temporomandibular joint surgery, bone reconstruction, and complex implant surgery. His combined DDS/MD training, Emory residency, and additional trauma fellowship make him one of the most comprehensively trained OMS practitioners in the southeastern United States.

After completing his undergraduate degree at Vanderbilt, Dr. Harrelson earned his DDS at the University of Tennessee and his MD at Emory University School of Medicine, completing the demanding dual-degree pathway that remains the gold standard for OMS training in the US. His four-year residency at Emory University Hospital and Grady Memorial Hospital — one of the busiest Level I trauma centers in the country — provided intensive exposure to maxillofacial trauma, complex reconstruction, and head and neck pathology. He then completed an additional year of fellowship training in craniomaxillofacial trauma at the R Adams Cowley Shock Trauma Center at the University of Maryland, the world's first integrated trauma center.

Dr. Harrelson returned to Nashville in 2002 and founded the Tennessee Center for Oral & Maxillofacial Surgery, which has grown into a five-surgeon practice with two surgical suites equipped for IV sedation and general anesthesia. Over his career, he has performed more than 11,000 surgical procedures, including 3,500 wisdom tooth extractions under general anesthesia, 1,800 implant placements with simultaneous bone grafting, 450 orthognathic surgery cases, and 300 craniomaxillofacial trauma reconstructions.

From 2004 to 2017, Dr. Harrelson served as a Clinical Associate Professor at Vanderbilt University Medical Center's Department of Oral and Maxillofacial Surgery, where he participated in resident training, didactic teaching, and trauma call rotations. He is a Diplomate of the American Board of Oral and Maxillofacial Surgery, a Fellow of the American College of Surgeons, and a Fellow of the American Association of Oral and Maxillofacial Surgeons.

He has authored 34 peer-reviewed publications in the Journal of Oral and Maxillofacial Surgery, the International Journal of Oral & Maxillofacial Surgery, the Journal of Craniomaxillofacial Surgery, and the Journal of Trauma and Acute Care Surgery. His research has focused on fixation techniques in mandibular fractures, outcomes of immediate versus delayed implant placement in grafted sites, and airway management protocols in office-based OMS anesthesia. He has presented at over 55 national and international conferences, including the AAOMS Annual Meeting, the AO CMF International Conference, and the American College of Surgeons Clinical Congress.

Dr. Harrelson is a member of the American Association of Oral and Maxillofacial Surgeons, the American Dental Association, the American College of Surgeons, the AO CMF, and the Tennessee Dental Association. On SmileJet's Board of Excellence, Dr. Harrelson serves as the chief surgical safety advisor, responsible for evaluating partner clinic surgical facility accreditation, anesthesia and sedation protocols, infection control standards, emergency preparedness, and the review of complex surgical cases including bone grafting, orthognathic surgery, and zygomatic implant procedures across all SmileJet markets.