Stegenga B, Broekhuijsen M L, De Bont L G, Van Willigen J D
Department of Oral and Maxillofacial Surgery, University Hospital, Groningen, The Netherlands.
J Oral Rehabil. 1992 Nov;19(6):639-47. doi: 10.1111/j.1365-2842.1992.tb01493.x.
The aim of this study was to investigate the potential clinical relevance of testing bite force endurance in patients with articular temporomandibular disorders. The endurance of a 50 N bite force was measured in 51 patients with painful temporomandibular joint disorders. The results were compared to those of a control group of 20 subjects. The force exerted was sustained until this task could not be continued because of intolerable pain or fatigue. The endurance test was repeated following therapy. Testing bite force endurance could be reliably carried out (paired t-test not significant, product-moment correlation coefficient 0.87). The mean endurance time in the patient group was significantly different from that of the control group (t = 7.43, df = 69, P < 0.01). The 95% confidence intervals for patients and controls did not show any overlap. No difference in endurance time between diagnostic subgroups could be detected (F = 1.30, df = 4,46, P < 0.28). Following treatment, all patients showed a significant increase of endurance time (t = 8.09, df = 50, P < 0.01) and reported a decrease in post-test pain. The mean difference between pre- and post-treatment endurance was 60s. Subjects of the control group stopped the biting effort predominantly because of muscle fatigue. By contrast, the main reason of the patients to cease the effort was TMJ pain. The results of this study indicate that the discriminatory power of the test is sufficient to justify its utility as a complementary tool in assessing the functional capacity of the masticatory system.
本研究的目的是调查测试颞下颌关节紊乱患者咬力耐力的潜在临床相关性。对51例颞下颌关节疼痛紊乱患者测量了50N咬力的耐力。将结果与20名受试者的对照组进行比较。施加的力持续到由于无法忍受的疼痛或疲劳而无法继续这项任务。治疗后重复耐力测试。咬力耐力测试可以可靠地进行（配对t检验无显著性差异，积差相关系数为0.87）。患者组的平均耐力时间与对照组有显著差异（t = 7.43，自由度 = 69，P < 0.01）。患者和对照组的95%置信区间没有重叠。诊断亚组之间的耐力时间没有差异（F = 1.30，自由度 = 4,46，P < 0.28）。治疗后，所有患者的耐力时间均显著增加（t = 8.09，自由度 = 50，P < 0.01），且测试后疼痛减轻。治疗前后耐力的平均差异为60秒。对照组受试者主要因肌肉疲劳而停止咬合力。相比之下，患者停止用力的主要原因是颞下颌关节疼痛。本研究结果表明，该测试的鉴别能力足以证明其作为评估咀嚼系统功能能力的补充工具的实用性。
