Average chewing pattern improvements following Disclusion Time reduction

Objectives: Studies involving electrognathographic (EGN) recordings of chewing improvements obtained following occlusal adjustment therapy are rare, as most studies lack ‘chewing’ within the research. The objectives of this study were to determine if reducing long Disclusion Time to short Disclusion Time with the immediate complete anterior guidance development (ICAGD) coronoplasty in symptomatic subjects altered their average chewing pattern (ACP) and their muscle function.

Methods: Twenty-nine muscularly symptomatic subjects underwent simultaneous EMG and EGN recordings of right and left gum chewing, before and after the ICAGD coronoplasty. Statistical differences in the mean Disclusion Time, the mean muscle contraction cycle, and the mean ACP resultant from ICAGD underwent the Student’s paired t-test (α = 0.05).

Results: Disclusion Time reductions from ICAGD were significant (2.11–0.45 s. p = 0.0000). Post-ICAGD muscle changes were significant in the mean area (p = 0.000001), the peak amplitude (p = 0.00005), the time to peak contraction (p < 0.000004), the time to 50% peak contraction (p < 0.00001), and in the decreased number of silent periods per side (right p < 0.0000002; left p < 0.0000006). Post-ICAGD ACP changes were also significant; the terminal chewing position became closer to centric occlusion (p < 0.002), the maximum and average chewing velocities increased (p < 0.002; p < 0.00005), the opening and closing times, the cycle time, and the occlusal contact time all decreased (p < 0.004–0.0001).

Conclusion: The average chewing pattern (ACP) shape, speed, consistency, muscular coordination, and vertical opening improvements can be significantly improved in muscularly dysfunctional TMD patients within one week’s time of undergoing the ICAGD enameloplasty. Computer-measured and guided occlusal adjustments quickly and physiologically improved chewing, without requiring the patients to wear pre- or post-treatment appliances.     

窝沟釉质成形封闭术2年临床观察

目的：评价窝沟釉质成形封闭术的临床效果。方法：在84名儿童的第一磨牙上采用半口对照法比较窝沟釉质成形术和普通封闭术封闭剂的保存率。结果：封闭后6个月和1年时，两者保存率无显著性差异；而在2年时有显著性差异。结论：窝沟釉质成形术好于 普通封闭术。     

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目的：评价不同酸蚀方法应用于窝沟封闭术的临床效果。方法选取2011年9月至2012年3月在佛山市禅城区口腔医院就诊的6~8岁儿童90例作为研究对象（共240颗第一恒磨牙）,随机分为3组,每组30例。分别采用自酸蚀黏结剂（A组）、窝沟釉质成形术结合自酸蚀黏结剂（B组）以及磷酸酸蚀剂（C组）处理牙面后行窝沟封闭术,术后随诊3、6和12个月,比较3种方法的临床效果。结果在术后3个月和6个月时,3组的窝沟封闭剂保留率和患龋率差异均无统计学意义（均P〉0.05）。术后12个月时,A组的窝沟封闭剂保留率最低,患龋率最高,与其他两组的差异均有统计学意义（均P〈0.05）;但B组与C组间差异无统计学意义（P〉0.05）。结论自酸蚀黏结剂法行窝沟封闭术的效果不及磷酸酸蚀法,结合使用窝沟釉质成形术可提高窝沟封闭的临床效果。磷酸酸蚀法与窝沟釉质成形术结合自酸蚀黏结剂法的效果相当。     

Estiseal LC光固化窝沟封闭树脂的临床比较

目的探讨光固化窝沟封闭剂预防窝沟龋的临床疗效。方法对60例6~10岁儿童的240颗上、下颌第1恒磨牙用Estiseal LC进行窝沟釉质成形封闭术,并采用自身对照的研究方法用Estiseal LC行普通窝沟封闭术,然后评价两者的效果。结果随诊3年后发现Estiseal LC光固化窝沟封闭树脂用于窝沟釉质成形封闭术与窝沟杯刷清洗封闭术组术后1、2、3年时均有显著性差异(P<0.01)。结论Estiseal LC树脂是一种可靠的窝沟封闭剂,2种封闭术均有良好的临床疗效,窝沟釉质成形封闭术的防龋效果优于窝沟杯刷清洗封闭术。     

窝沟封闭术酸蚀方法研究

目的 评价不同酸蚀方法应用于窝沟封闭术的临床效果。方法 选取2011年9月至2012 年3月在佛山市禅城区口腔医院就诊的6 ~ 8岁儿童90例作为研究对象（共240颗第一恒磨牙）,随机分为3组,每组30例。分别采用自酸蚀黏结剂（A组）、窝沟釉质成形术结合自酸蚀黏结剂（B组）以及磷酸酸蚀剂（C组）处理牙面后行窝沟封闭术,术后随诊3、6和12个月,比较3种方法的临床效果。结果 在术后3个月和6个月时,3组的窝沟封闭剂保留率和患龋率差异均无统计学意义（均P > 0.05）。术后12个月时,A组的窝沟封闭剂保留率最低,患龋率最高,与其他两组的差异均有统计学意义（均P < 0.05）;但B组与C组间差异无统计学意义（P > 0.05）。结论 自酸蚀黏结剂法行窝沟封闭术的效果不及磷酸酸蚀法,结合使用窝沟釉质成形术可提高窝沟封闭的临床效果。磷酸酸蚀法与窝沟釉质成形术结合自酸蚀黏结剂法的效果相当。     

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目的    探讨流动树脂用于窝沟釉质成形术的临床效果。方法    2007年12月至2008年6月昆明医学院附属口腔医院收治的中磨牙窝沟龋患儿84 例（336颗患牙），按就诊顺序随机分为试验组和对照组，各168颗患牙。试验组使用流动树脂行窝沟釉质成形术，对照组使用传统的窝沟封闭剂行窝沟釉质成形术。随访观察1年。结果    封闭后6个月，试验组和对照组的保留率差异无统计学意义（P > 0.05）；1年后，试验组流动树脂保留率明显高于对照组，且差异具有统计学意义（P < 0.05）。结论    行窝沟釉质成形术治疗已形成可疑龋坏的磨牙时，流动树脂效果优于普通窝沟封闭剂。