Clayton J A, Beard C C
J Prosthet Dent. 1986 Apr;55(4):500-5. doi: 10.1016/0022-3913(86)90187-3.
One of the signs and symptoms of TMJ dysfunction is incoordinated mandibular movements. The PRI quantitates the incoordinated movements and gives a muscle dysfunction score and the relative severity of TMJ dysfunction. An electronic, computerized pantograph (Pantronic) has been developed that can be used in place of the mechanical pantograph. This study was undertaken to determine if the Pantronic can be programmed to produce PRI scores that are comparable to the M-pantograph PRI scores. Several programs were written for the computer until the Pantronic PRI was comparable to the M-pantograph PRI. The Pantronic PRI was within zero to 5 points of the M-pantograph PRI in all of the 25 patients studied. Because of this close comparison, studies used to validate the M-pantograph PRI also validate the Pantronic PRI. There was, however, a statistically significant difference (.05 level) between the two PRI scores. In spite of this difference the categories of TMJ dysfunction remained the same. The Pantronic PRI can be determined clinically in 20 to 30 minutes. It can be used to determine the presence and, more important, the absence of TMJ dysfunction; the success of occlusal splint therapy, occlusal adjustment, and restorative treatment; the changes in dysfunction over time; the success of other treatment modalities; and the level of dysfunction in TMJ dysfunction research.
颞下颌关节功能紊乱的体征和症状之一是下颌运动不协调。PRI（姿势恢复指数）对不协调运动进行量化，并给出肌肉功能障碍评分以及颞下颌关节功能紊乱的相对严重程度。现已开发出一种电子计算机化的面弓描记仪（Pantronic），可用于替代机械面弓描记仪。本研究旨在确定Pantronic是否可以编程生成与M型面弓描记仪PRI评分相当的分数。为计算机编写了几个程序，直到Pantronic PRI与M型面弓描记仪PRI相当。在所有25例研究患者中，Pantronic PRI与M型面弓描记仪PRI的差值在0至5分以内。由于这种密切的比较关系，用于验证M型面弓描记仪PRI的研究也验证了Pantronic PRI。然而，两种PRI评分之间存在统计学上的显著差异（0.05水平）。尽管存在这种差异，但颞下颌关节功能紊乱的类别保持不变。Pantronic PRI可在临床20至30分钟内测定。它可用于确定颞下颌关节功能紊乱的存在与否，更重要的是确定不存在功能紊乱；咬合板治疗、咬合调整和修复治疗的成功率；功能紊乱随时间的变化；其他治疗方式的成功率；以及颞下颌关节功能紊乱研究中的功能紊乱程度。
