目的:关于颞下颌关节紊乱病(TMD)患者外周肌氧合和咀嚼肌压力痛阈值(PPT)变化的研究是有限的。这项研究的目的是比较咬肌周围氧合的变化;不同类型TMD的个体的咬肌和颞肌的PPT以及相关的周围肌氧合和咬肌的PPT。
方法:涉及116名参与者的横断面研究分为三组:肌肉组(MG,n=32),联合组(JG,n=30)和肌肉关节组(MJG,n=54)。个人年龄26.97±6.93,68.97%为女性,包括31,03%的男性。所有参与者都使用颞下颌疾病诊断标准进行评估,用于外周肌肉氧合的近红外光谱(NIRS)和用于PPT的压力计。
结果:各组间咬肌的氧合无差异。在咬肌,PPT与MG(rho=0.365)和JG(rho=0.317)的组织饱和指数变化之间呈弱正相关。此外,MJG表达的PPT低于JG(p=0.004),证明MJG的肌肉疼痛更大。
结论:MJG的咬肌PPT较低。尽管PPT取决于TMD的类型,PPT与氧合的相关性较弱。所有评估的TMD组(MG,JG,MJG)显示咬肌的血液动力学相似性。
结论:了解咀嚼肌的疼痛阈值和血流动力学行为有助于对TMD进行更自信的理疗评估,作为谨慎和个性化干预的基础。
OBJECTIVE: Studies exploring variations in peripheral muscle oxygenation and pressure pain thresholds (PPT) of masticatory muscles in individuals with Temporomandibular Disorders (TMDs) are limited. The purpose of this study was to compare variations in peripheral oxygenation of the masseter muscle; PPT of the masseter and temporal muscles and correlate peripheral muscle oxygenation and PPT of the masseter muscle in individuals with different types of TMDs.
METHODS: Cross-sectional study involving 116 participants classified into three groups: muscle group (MG, n = 32), joint group (JG, n = 30) and muscle-joint group (MJG, n = 54). Individuals aged 26.97 ± 6.93, 68.97% female, 31,03% males were included. All participants were evaluated using the Diagnostic Criteria for Temporomandibular Disorders, Near-infrared spectroscopy (NIRS) for peripheral muscle oxygenation and pressure algometer for PPT.
RESULTS: There was no difference in masseter muscle oxygenation among groups. In the masseter muscle, a weakly positive correlation was observed between PPT and variation in tissue saturation index in the MG (rho = 0.365) and JG (rho = 0.317). In addition, the MJG expressed lower PPT (p = 0.004) than JG, demonstrating that MJG had more pain in this muscle.
CONCLUSIONS: MJG have lower PPT in the masseter muscle. Although the PPT is dependent on the type of TMDs, the correlation between PPT and oxygenation is weak. All TMDs groups evaluated (MG, JG, MJG) showed hemodynamic similarities of the masseter muscle.
CONCLUSIONS: Understanding pain thresholds and the hemodynamic behavior of the masticatory muscles contributes to a more assertive physiotherapeutic assessment in TMDs, serving as a basis for careful and individualized interventions.