Red Light Photobiomodulation Therapy

Photobiomodulation Therapy in Scottsdale & Prescott, Arizona

Preparing the Biology of Healing Before and After Regenerative Joint Procedures

At RegeneZone™, we do not view a regenerative joint injection as an isolated procedure. The injection may take less than an hour, but the biological process of tissue repair continues for weeks and months. For that reason, Dr. John A. Robinson, NMD, uses photobiomodulation therapy before and after joint procedures to help prepare the tissue, support cellular energy production, regulate inflammation, and create a more favorable environment for healing.

Rather than limiting photobiomodulation to occasional treatments inside the clinic, Dr. Robinson provides patients with a cutting-edge handheld home laser and a structured treatment protocol. Patients typically begin using the device at home four weeks before an ultrasound-guided joint injection with HCT/P products and continue treatment for four weeks afterward. Focused acoustic wave therapy is then incorporated after the injection to further support circulation, mechanotransduction, angiogenesis, and tissue remodeling.

This integrated approach is part of the RegeneZone Method™: prepare the biology before the procedure, perform the treatment with ultrasound-guided precision, and continue supporting the regenerative process afterward.

Schedule a Regenerative Joint Consultation

What is Photobiomodulation?

Handheld home photobiomodulation laser for joint recovery

Photobiomodulation, commonly abbreviated as PBM, is the therapeutic application of red and near-infrared light to influence cellular activity. It was formerly called low-level laser therapy, or LLLT, although the term photobiomodulation more accurately describes its biological effects.

Unlike surgical lasers, photobiomodulation does not cut, burn, or intentionally heat the tissue. It delivers specific wavelengths of light at carefully controlled doses. Light energy is absorbed by cellular chromophores, including components of the mitochondrial respiratory chain, where it can influence ATP production, oxidative signaling, calcium activity, inflammatory pathways, and cellular communication.

In simple terms, photobiomodulation provides light-based signals that may help cells produce energy and respond more effectively during the healing process.

Why Cellular Energy Matters for Joint Healing

Tissue repair is an energy-intensive process. Chondrocytes, fibroblasts, tenocytes, muscle cells, vascular cells, and local progenitor cells all require energy to synthesize proteins, remodel extracellular matrix, regulate inflammation, and communicate with surrounding tissues.

Mitochondria produce ATP, the energy currency used to power these activities. When a joint has been affected by chronic inflammation, poor circulation, oxidative stress, previous injury, or degenerative change, its cellular environment may be less capable of supporting an effective healing response.

    • Mitochondrial ATP production

    • Cellular metabolism

    • Cell viability and proliferation

    • Migration of reparative cells

    • Angiogenesis and microcirculation

    • Oxidative stress

    • Inflammatory signaling

    • Extracellular-vesicle secretion

    • Collagen and extracellular-matrix remodeling

    • Bone, muscle, tendon, nerve, and wound repair

The position paper reviewed 204 studies examining PBM in conjunction with regenerative cells and reported positive findings in most of the studies, while also emphasizing that clinical protocols remain variable and that more well-designed human trials are needed.

Why We Use Red and Near-Infrared Light

The majority of successful protocols reviewed in the WALT position paper used wavelengths within two primary ranges.

Red Light: Approximately 630–660 Nanometers

Red wavelengths are commonly studied for more superficial tissues and cellular effects involving:

  • Skin and wound healing

  • Fibroblast activity

  • Collagen production

  • Cellular proliferation

  • Superficial tendons and soft tissues

Near-Infrared Light: Approximately 800–890 Nanometers

Near-infrared wavelengths penetrate more deeply and have been studied in applications involving:

  • Joints

  • Tendons and ligaments

  • Skeletal muscle

  • Bone

  • Peripheral nerves

  • Deeper soft tissues

The paper identified wavelengths of approximately 630–660 nm and 800–890 nm as the ranges most commonly used in PBM research involving regenerative cells. It also proposed approximately 0.5–2 J/cm² as a potentially useful range for future studies focused specifically on cellular proliferation, while making clear that the appropriate dose depends on the tissue, treatment goal, device, power density, and delivery technique.

More light is not automatically better. Photobiomodulation follows a biphasic dose response, meaning an appropriate dose may stimulate cellular activity while an excessive or poorly selected dose may produce less benefit or potentially inhibit the desired response. For this reason, patients should follow the prescribed device-specific treatment protocol rather than assuming that longer treatment times or greater frequency will produce better results.

The Mechanisms That Matter Most

  • Red and near-infrared light may influence mitochondrial chromophores, including cytochrome c oxidase. This can affect electron transport, nitric-oxide availability, membrane potential, and ATP production.

    Greater energy availability may help support the metabolic demands of tissue repair.

  • Inflammation is necessary during healing, but excessive or persistent inflammation can interfere with tissue repair. PBM has been studied for its effects on oxidative stress, NF-κB signaling, cytokine expression, and inflammatory-cell activity.

    The goal is not to eliminate inflammation. It is to encourage a more organized and productive inflammatory response.

  • Healing tissues require oxygen, nutrients, signaling molecules, and an effective blood supply. PBM has been associated in preclinical research with changes in vascular endothelial growth factor and other angiogenic pathways.

  • Many regenerative effects occur through paracrine communication: cells releasing growth factors, cytokines, extracellular vesicles, and other signaling molecules that influence nearby tissues.

    One study included in the WALT review reported a 6.25-fold increase in extracellular-vesicle secretion after 830 nm PBM exposure of human adipose-derived cells. This was an in-vitro finding and should not be interpreted as proof that the same magnitude of effect occurs in a treated human joint, but it provides an important mechanistic basis for continued research.

  • The scientific literature reviewed applications involving bone, cartilage, tendon, muscle, nerve, and wound repair. Results varied by wavelength, fluence, cell type, tissue, scaffold, and treatment schedule, and the authors could not establish one universal protocol for all tissues.

    This variability is why Dr. Robinson uses PBM as one component of an individualized regenerative plan rather than as a stand-alone cure.

The RegeneZone™ Home Photobiomodulation Protocol

A major difference between our approach and conventional in-office laser therapy is continuity. Regeneration does not occur only during a clinic appointment. It unfolds every day as tissues move through inflammation, proliferation, repair, and remodeling.

To support that process consistently, Dr. Robinson has patients use a handheld photobiomodulation laser at home for eight weeks surrounding their regenerative joint procedure.

Phase One: Four Weeks Before the Joint Injection

A major difference between our approach and conventional in-office laser therapy is continuity. Regeneration does not occur only during a clinic appointment. It unfolds every day as tissues move through inflammation, proliferation, repair, and remodeling.

To support that process consistently, Dr. Robinson has patients use a handheld photobiomodulation laser at home for eight weeks surrounding their regenerative joint procedure.

Phase Two: Ultrasound-Guided HCT/P Joint Procedure

After four weeks of biological priming, Dr. Robinson performs the planned joint procedure using the selected HCT/P product.

Diagnostic musculoskeletal ultrasound allows Dr. Robinson to examine the joint and surrounding structures dynamically, identify the target tissue, and guide the injection in real time. The treatment plan may vary according to the joint, tissue involved, extent of degeneration, previous injuries, biomechanics, systemic inflammatory burden, and the patient’s broader health status.

The procedure is therefore not based simply on the location of pain. It is based on identifying the structure that requires treatment and delivering the product with image-guided precision.

Handheld home photobiomodulation laser for joint recovery

Phase Three: Four Weeks After the Joint Injection

Patients continue using the handheld home photobiomodulation laser for four additional weeks after the procedure.

During this period, PBM is intended to support:

  • Cellular energy availability

  • Controlled inflammatory signaling

  • Microcirculation and angiogenesis

  • Cellular communication

  • Extracellular-matrix production

  • Collagen organization

  • Tissue repair and remodeling

The first several weeks after an orthobiologic procedure represent an active biological period. Daily home treatment allows the patient to support that process consistently rather than waiting for intermittent office appointments.

Handheld home photobiomodulation laser for joint recovery

Why We Add Acoustic Wave Therapy After the Injection

Following the injection, Dr. Robinson also incorporates focused acoustic wave therapy as part of the RegeneZone recovery protocol.

Photobiomodulation and acoustic wave therapy influence tissue through different mechanisms. PBM uses light-based signaling to influence mitochondrial function and cellular activity. Acoustic wave therapy delivers controlled mechanical energy to the treated region.

This mechanical stimulus may support:

  • Mechanotransduction

  • Local circulation

  • Angiogenic signaling

  • Tissue metabolism

  • Collagen turnover and organization

  • Tendon and ligament remodeling

  • Recovery of chronically dysfunctional tissue

Mechanotransduction is the process through which cells detect and respond to mechanical forces. This is important because connective tissues are not restored through biological signaling alone. Tendons, ligaments, cartilage, bone, and muscle must also adapt to appropriate mechanical input.

The timing of acoustic wave therapy is individualized. It is used after the HCT/P injection, rather than as an aggressive treatment immediately before the procedure, and is coordinated with the joint treated, tissue condition, procedure performed, and stage of recovery.

Why Home Treatment Is Different

An occasional in-office laser session may provide a biological stimulus, but tissue healing occurs continuously. A handheld home laser allows patients to follow a repeated, structured protocol throughout the weeks before and after their procedure.

    • Consistent treatment throughout biological priming

    • Daily support during early recovery

    • Reduced dependence on repeated clinic visits

    • Greater patient participation in recovery

    • Continuity between the preparation and remodeling phases

    • Treatment that can be directed to the prescribed anatomical area

The device does not replace the joint procedure, diagnostic evaluation, rehabilitation, progressive loading, nutrition, hormone optimization, or other aspects of care. It is an adjunct designed to support the biological environment surrounding the procedure.

HERE is an excellent placebo controlled study showing the direct benefits of a handheld home device.

Schedule a Photobiomodulation and Joint Evaluation in Scottsdale

A regenerative procedure should be more than an injection. It should be a carefully planned process that prepares the tissue, delivers the treatment precisely, and supports the body throughout recovery.

At RegeneZone™, Dr. John A. Robinson uses an integrated eight-week home photobiomodulation protocol surrounding ultrasound-guided HCT/P joint procedures, followed by focused acoustic wave therapy during the post-procedure recovery period.

Your plan may include:

  • Comprehensive medical and musculoskeletal evaluation

  • Diagnostic ultrasound

  • Ultrasound-guided joint injections

  • HCT/P regenerative products

  • Four weeks of home PBM before the procedure

  • Four weeks of home PBM after the procedure

  • Focused acoustic wave therapy after the injection

  • Progressive rehabilitation and mechanical loading

  • Evaluation of systemic inflammation

  • Nutritional, metabolic, and hormonal optimization when indicated

Dr. Robinson’s central philosophy is that regenerative outcomes depend on more than the product placed into the joint. The health of the patient, the condition of the tissue, the precision of the procedure, and the support provided during recovery all matter.

The better the biology, the better the opportunity for regeneration.

To learn whether this approach may be appropriate for your joint or soft-tissue condition, schedule a regenerative evaluation at RegeneZone in Scottsdale, Arizona.

Frequently Asked Questions

  • Photobiomodulation may be incorporated into regenerative treatment plans for patients with joint and soft-tissue conditions such as:

    • Knee osteoarthritis

    • Hip degeneration

    • Shoulder pain

    • Rotator-cuff tendinopathy

    • Elbow tendinopathy

    • Wrist and hand conditions

    • Sacroiliac joint dysfunction

    • Ankle and foot injuries

    • Tendon degeneration

    • Ligament injuries

    • Chronic muscle injuries

    • Postsurgical or post-traumatic tissue dysfunction

    Photobiomodulation is not used as a substitute for a proper diagnosis. Pain in the same general location may originate from cartilage, tendons, ligaments, muscle, fascia, bone, bursae, nerves, or referred structures. A clinical examination and diagnostic ultrasound help determine whether a regenerative treatment plan is appropriate.

  • Photobiomodulation is a more precise clinical term describing the biological effects of red or near-infrared light delivered at specific wavelengths, power densities, doses, and treatment schedules. Consumer red-light devices vary considerably in output and may not be equivalent to a physician-directed handheld laser protocol.

  • PBM is intended to produce nonthermal biological effects. Patients may perceive mild warmth depending on the device and treatment conditions, but the objective is not to heat, burn, or ablate tissue.

  • Dr. Robinson’s typical joint protocol involves daily home use for four weeks before the HCT/P injection and four weeks afterward. The exact application time, frequency, and treatment location are prescribed according to the device and condition being treated.

  • No. PBM follows a dose-response relationship, and more treatment is not necessarily better. Patients should use the device only as directed.

  • Acoustic wave therapy is incorporated after the regenerative joint procedure. The precise timing and schedule depend on the joint, treated tissue, clinical findings, and recovery response.

  • PBM may sometimes be used independently for pain or tissue support, but within the RegeneZone Method it is typically used as an adjunct to prepare the tissue before a regenerative joint procedure and support recovery afterward.

  • These tissues have all been examined in laboratory or animal research, but the quality and quantity of clinical evidence differ considerably by condition. The 2025 WALT position paper concluded that promising effects have been reported while also emphasizing the shortage of standardized human clinical trials.

  • PBM is generally noninvasive and well tolerated when appropriately administered. Eye protection and device-specific precautions are important. PBM should not be applied directly over a suspected malignancy without appropriate medical evaluation, and treatment may not be suitable for every patient.

Medical Disclaimer

Photobiomodulation, acoustic wave therapy, and HCT/P products may not be appropriate for every condition or patient. The information on this page is educational and does not constitute medical advice, a diagnosis, or a guarantee of results. The scientific literature includes laboratory, animal, and limited human studies, and standardized clinical protocols have not been established for every tissue or condition. Individual outcomes vary. Certain regenerative products and applications may be investigational and may not be FDA-approved for the treatment of a specific disease or condition.

Scientific Reference

Azarsina M, Arany P, Marques MM, et al. Photobiomodulation for Stem Cell Modulation and Regenerative Medicine: WALT Position Paper 2025. Journal of Dentistry. 2025. doi:10.1016/j.jdent.2025.105832.