Department of Morphology, Stomatology and Physiology, Ribeirão Preto School of Dentistry, University of São Paulo, Brazil.
J Oral Rehabil. 2011 Sep;38(9):668-73. doi: 10.1111/j.1365-2842.2011.02201.x. Epub 2011 Feb 5.
This research evaluated the effects of Brånemark protocol on electromyography of the masseter and temporal muscles. The patients were divided into two groups: Group I: patients who wore an implant-supported prosthesis in the mandibular arch following Brånemark protocol, and maxillary removable complete dentures; Group II: dentate individuals (control). Electromyography was carried out at rest, right (RL) and left (LL) laterality, protrusion and maximum voluntary contraction (MVC). Data were compared by t-test. At rest, a higher electromyographic (EMG) activity was observed in Group I, and the values were significant in the right masseter and left temporal muscles. In RL, there were statistically significant differences for right masseter (P < 0·01), left masseter and temporal muscles and for the left temporal muscle in LL (P < 0·05). In protrusion, Group I presented a higher EMG activity, and there was a statistically significant difference for the right masseter muscle (RM) (P < 0·05). In MVC, the EMG values were higher in Group II (control), but significant just for the right temporal muscle (P < 0·05). In conclusion, individuals with mandibular fixed dentures supported according to the Brånemark protocol and maxillary removable complete dentures showed a higher activity of masticatory muscles during the mandibular postural clinical conditions examined; however, in the MVC, Group I presented lower values when compared to dentate group. Despite presenting different EMG values in all of the clinical conditions, both groups showed similar EMG patterns of muscle activation which demonstrates that the proposed treatment can be considered as a good option for oral rehabilitation.
本研究评估了 Brånemark 方案对咀嚼肌和颞肌肌电图的影响。患者分为两组：I 组：接受 Brånemark 方案下颌弓种植体支持义齿修复，上颌可摘全口义齿修复的患者；II 组：有牙个体（对照组）。在休息、右侧（RL）和左侧（LL）偏侧咀嚼、前伸和最大自主收缩（MVC）时进行肌电图检查。采用 t 检验比较数据。在休息时，I 组的肌电图（EMG）活性较高，右侧和左侧咬肌及左侧颞肌的数值具有显著性差异。在 RL 时，右侧咬肌（P < 0·01）、左侧咬肌和颞肌以及 LL 时左侧颞肌的差异具有统计学意义（P < 0·05）。在前伸时，I 组的 EMG 活性较高，右侧咬肌（RM）具有统计学意义（P < 0·05）。在 MVC 时，II 组（对照组）的 EMG 值较高，但仅右侧颞肌具有显著性差异（P < 0·05）。结论：根据 Brånemark 方案支持的下颌固定义齿和上颌可摘全口义齿的患者在检查的下颌姿势临床条件下表现出较高的咀嚼肌活性；然而，在 MVC 时，I 组与有牙组相比，其值较低。尽管在所有临床情况下均表现出不同的 EMG 值，但两组的肌肉激活 EMG 模式相似，表明该治疗方案可被视为口腔康复的良好选择。
