By Dr Amit Ashok Basannavar
Consultant Oral, Maxillofacial & Cleft Care Surgeon.
Associate Professor,
Department Of Oral And Maxillofacial Surgery
Bharti Vidyapeeth Deemed To Be University Dental College & Hospital, Sangli
Maharashtra, India
In Oral and Maxillofacial Surgery (OMFS), lasers and light based strategies play a pivotal role not only in surgical interventions but also in adjunctive therapies like photodynamic therapy (PDT) and photobiomodulation (PBM). These advanced applications harness the unique properties of light to enhance surgical outcomes, reduce post surgical complications, and improve patient comfort.
Photodynamic Therapy (PDT)
PDT utilises a combination of a photosensitising agent and light of a specific wavelength to induce a highly specific and localised phototoxic reaction in selected targeted tissues. In OMFS, PDT finds application primarily in the management of oral precancerous lesions, such as leukoplakia and erythroplakia, as well as in the treatment of localised oral cancers (Carcinoma In-situ)
The process involves several key steps:
- Photosensitizer Application: A photosensitising agent, often a light-sensitive drug like 5-aminolevulinic acid (5-ALA) or methylene blue, is applied topically or administered systemically. This agent accumulates preferentially in abnormal cancerous tissues.
- Light Activation: After a sufficient period (soaking time) for the photosensitizer to localise, a laser emitting light of a specific wavelength (usually in the red spectrum) is applied to the target area. This light activates the photosensitizer, generating reactive oxygen species that induce cellular damage and apoptosis selectively in the cancerous tissues.
- Clinical Applications: PDT in OMFS has shown promising results in the treatment of oral potentially malignant disorders (OPMDs) and early-stage oral cancers. It offers advantages such as minimal invasiveness, preservation of healthy tissues, and reduced systemic side effects compared to traditional therapies like surgery or chemotherapy.
Photobiomodulation Therapy (PBMT)
PBMT, also known as low-level laser therapy (LLLT) or laser biostimulation, involves the application of low-intensity laser light or light-emitting diodes (LEDs) to tissues to promote healing, reduce inflammation, and relieve pain. In OMFS, PBMT is utilised in a variety of clinical scenarios:
- Post-Surgical Pain Management: PBMT can significantly reduce pain and accelerate healing following surgical procedures such as dental extractions, implant placements, and periodontal surgeries. It achieves this by modulating cellular processes, enhancing tissue repair mechanisms, and reducing inflammation.
- Wound Healing: By promoting angiogenesis, collagen synthesis, and fibroblast proliferation, PBMT enhances the overall wound healing process. This is particularly beneficial in the management of chronic wounds, mucositis, and oral ulcers commonly encountered in OMFS practice.
- Temporomandibular Disorders (TMD): PBMT has been explored as a non-invasive treatment option for TMD, offering symptomatic relief by reducing inflammation and muscle spasm in the temporomandibular joint and associated muscles.
- Neuropathic Pain: PBMT has shown promise in the management of neuropathic pain conditions such as trigeminal neuralgia and post-herpetic neuralgia, providing analgesic effects through its influence on nerve conduction and pain modulation pathways.
Clinical Considerations
Incorporating PDT and PBMT into Oral Surgical & maxillofacial practices requires consideration of several factors:
- Patient Selection: Proper patient selection based on clinical indications and contraindications ensures optimal outcomes.
- Dosimetry: Precise determination of laser parameters (wavelength, irradiance, RADIANT EXPOSURE etc) tailored to individual patient needs and specific clinical conditions is crucial.
- Safety: Adherence to safety protocols, including eye protection and adequate training in laser use, minimises risks associated with laser therapy.
In conclusion, lasers in Oral & maxillofacial surgery have evolved beyond traditional surgical applications to include PDT for targeted treatment of oral cancers and PBMT for pain management and tissue healing enhancement. These advanced laser therapies represent a new frontier in enhancing patient care through precision, effectiveness, and ability to minimise morbidity associated with conventional surgery. Integrating these therapies into clinical practice requires a nuanced understanding of their mechanisms and careful consideration of patient-specific factors to optimise therapeutic outcomes.