Draft:ISO Metrik Device
Facial resistance training device
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The ISO Metrik Device is a patented intra-oral resistance apparatus developed by Prentice Capri McGhee and produced by ISO Metrik Solutions, Inc., based in Atlanta, Georgia. The system integrates principles from plastic surgery, dermatology, orthopedics, dentistry, and aesthetic design to apply controlled mechanical resistance to the perioral, mandibular, and midfacial musculature.
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Comment: Everything but one sentence lacks citations. The article is incredibly promotional with lines such as, "McGhee involved his daughters, Jasmine and Julia-Pun McGhee (born 2007 and 2010, respectively), who demonstrated strong academic aptitude from an early age" GGOTCC 02:57, 18 October 2025 (UTC)
| Type | Facial resistance training device |
|---|---|
| Inventor | Prentice Capri McGhee |
| Manufacturer | ISO Metrik Solutions, Inc. |
| Website | Official website |
By stabilizing the jaw through a bite plate and engaging the lips against dual polymeric holders mounted on a stainless-steel glide bar, the device enhances facial tone, symmetry, and bone-density maintenance in accordance with the biomechanical framework of Wolff’s Law. The ISO Metrik Device is classified as a non-invasive biomedical training device intended for facial rehabilitation and aesthetic conditioning.
History
The origins of the ISO Metrik Device trace back to inventor Prentice Capri McGhee’s recovery from a mild stroke in the early 2010s, which caused temporary facial paralysis. During rehabilitation, McGhee began studying the anatomy of the head and neck, focusing on the muscles and cranial nerves responsible for facial expression and motor control.
As part of his recovery, McGhee involved his daughters, Jasmine and Julia-Pun McGhee (born 2007 and 2010, respectively), who demonstrated strong academic aptitude from an early age. Together, they examined the relationships between facial muscles and nerves, exploring ways to stimulate recovery through controlled movement and resistance.
McGhee discovered that applying targeted resistance to specific muscle groups not only restored muscle function but also reduced facial wrinkles and improved skin tone. This dual therapeutic and aesthetic effect led him to hypothesize that controlled resistance could increase circulation and stimulate bone remodeling—principles consistent with Wolff’s Law.
He began designing a device capable of reproducing those results safely and consistently. The first prototypes were fabricated in 2018 using dental-grade polymers and stainless steel. In 2019, McGhee founded ISO Metrik Solutions, Inc. in Atlanta, Georgia, to refine, patent, and commercialize the invention.
Design and Mechanism
The ISO Metrik Device consists of three primary components:
- A bite plate that stabilizes and provides resistance to the mandible.
- A stainless-steel glide bar connecting both sides of the apparatus.
- Lip holders made from medical-grade polymers.
When the user bites gently on the plate and presses the lips against the holders, both the facial muscles and the mandible engage under controlled resistance. This dual activation creates symmetrical mechanical loading across the jaw, midface, and perioral region.
According to the company, this motion strengthens muscles, increases circulation, and may stimulate bone remodeling in the mandibular and midfacial skeletal structures, consistent with Wolff’s Law.
FDA and Regulatory Pathway
ISO Metrik Solutions is in the process of filing with the U.S. Food and Drug Administration (FDA) for clearance of the ISO Metrik Device as a Class II medical device. The filing will follow the FDA’s 510(k) premarket notification pathway, establishing substantial equivalence to predicate non-invasive facial exercise or rehabilitation devices. The regulatory submission includes documentation of:
- Device materials and biocompatibility.
- Manufacturing process and sterilization validation.
- Human factors, usability testing, and ergonomic safety.
- Preliminary clinical data supporting non-surgical muscle rehabilitation and cosmetic applications.
Upon clearance, the device will be authorized for clinical and aesthetic use within the United States and for international distribution through ISO-certified manufacturing facilities.
Clinical and Therapeutic Applications
The ISO Metrik Device is being investigated for potential roles in neuromuscular rehabilitation, including facial re-education following Bell’s palsy, stroke-related facial paralysis, and other conditions involving reduced facial muscle control and asymmetry. Preliminary internal case observations and ergonomic studies indicate that targeted resistance training of the facial muscles may promote improved neuromuscular coordination, circulation, and facial symmetry.
The device has not yet been cleared by the FDA for treatment of Bell’s palsy or stroke-related facial paralysis. Current evaluations are intended to support future submissions under the 510(k) pathway. Controlled clinical studies are planned to quantify neuromuscular outcomes and validate efficacy metrics.
Scientific Basis
Research in orthodontics, plastic surgery, and craniofacial biomechanics supports the relationship between facial-muscle activity, mechanical loading, and bone adaptation.[1][2][3][4][5][6][7][8]
Collectively, these studies suggest a correlation that targeted resistance training of facial musculature can influence skeletal integrity and visible aging patterns.
Independent Evaluation
In 2020, ISO Metrik Solutions commissioned the Atlanta-based design-research firm Thrive Thinking LLC to conduct independent human-factors and use-case studies on the device’s ergonomics, safety, and usability. The evaluation verified ergonomic comfort and identified an optimal resistance range between 65–85 mm, which informed refinements to comfort, hygiene, and usability.[9]
ISO Metrik Method
In 2024, ISO Metrik Solutions introduced the ISO Metrik Method, a multidisciplinary framework that extends the device’s biomechanical principles into full-body wellness disciplines such as Pilates, yoga, barre, and gym training. The Method connects facial resistance training with posture, breath control, and core alignment, forming what the company describes as a "face-to-frame" approach to aesthetic and orthopedic wellness. It is being developed as a professional certification and continuing-education program for wellness and medical-aesthetic professionals.
Patents
The ISO Metrik Device and related systems are protected under patents held by ISO Metrik Solutions, Inc. and inventor Prentice Capri McGhee. International intellectual property rights were secured under the Patent Cooperation Treaty (PCT) in 2019 (Application No. PCT/US2019/036373). This global filing established priority for patent protection in multiple jurisdictions, including the United States, Europe, Japan, China, South Korea, Canada, and Thailand.
- US 10 549 151 B2 (2020) – Granted
- US 11 278 762 B2 (2022) – Granted
- EP 3801786 B1 (2023) – Granted
- JP 7346560 B2 (2023) – Granted
- CN 112770818 B (2022) – Granted
- KR 20210028183 A (2021) – Granted
- CA 3120074 A1 (Pending)
- TH (Thailand DIP National-Phase Filing, Pending)
Primary PCT publication: WO 2019/237116 A1 – WIPO Record.
Reception and Applications
The ISO Metrik Device has been described within medical-aesthetic and wellness communities as bridging rehabilitative and non-surgical facial training. Early ergonomic and use-case evaluations have highlighted its potential for muscle re-education, post-stroke therapy, and aesthetic conditioning. Independent long-term clinical outcome data have not yet been published. The device has also been discussed within professional wellness and physical-therapy circles for its integration of aesthetic and rehabilitative principles.
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