Masseter Muscle

This study aims to evaluate whether intramuscular injections of platelet-rich plasma (PRP) are more effective than isotonic saline in reducing pain and improving jaw function in individuals diagnosed with myogenous temporomandibular disorders (TMD). Myogenous TMD is a common source of orofacial muscle pain and functional limitation, and although conservative treatments help many patients, a significant proportion continue to experience persistent symptoms that affect daily life and quality of function. PRP is an autologous, minimally invasive biologic concentrate enriched with platelets and bioactive molecules that may promote tissue repair and modulate inflammation, making it a promising option for managing muscle-related pain conditions. However, evidence from well-controlled randomized clinical trials in myogenous TMD remains limited. In this double-blind, randomized controlled clinical trial, participants will receive two intramuscular injections-either PRP or saline-administered one month apart. Follow-up assessments will occur at 1, 3, and 6 months using standardized and validated measures of pain intensity, pain sensitivity, mandibular function, and psychosocial factors. The results of this study may help determine the clinical value of PRP for myogenous TMD and contribute to future standardization of regenerative treatment protocols in orofacial pain management.

The primary objective of our study is to compare the thickness of the masseter muscle, measured by ultrasound, in individuals with chronic neck pain to that of healthy individuals. The secondary objective of the study is to examine the relationships between masseter muscle thickness and pain intensity, neck disability level, pain catastrophizing level, and clinical diagnostic criteria in individuals with chronic neck pain.

The goal of this observational study is to evaluate the effect of adenoid hypertrophy on the masseter muscle in children aged 3 to 8 years. The primary objectives are: * To assess whether adenoid hypertrophy affects the thickness or structure of the masseter muscle. * To determine whether there is a measurable difference in masseter muscle characteristics between children with and without adenoid hypertrophy. Researchers will compare children diagnosed with adenoid hypertrophy and scheduled for adenoidectomy to healthy controls without adenoid hypertrophy. Each participant will: * Undergo ultrasonographic examination of the masseter muscle using a 9L linear probe (6-15 MHz), and * Have their occlusal relationship, dental findings, age, sex, and adenoid hypertrophy grade recorded.