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Abstract：
OBJECTIVE: The study continues our longitudinal observation of wear aiming to further monitoring of progression and lesion morphology and to identify relationships with assumed aetiological factors.
METHODS: Molars (FDI #36 or #46) of 74 participants (23.8 ± 2.2 years) were scanned (Trios 3, 3Shape) at the third follow-up (T3; observation period 1,111 ± 10 days). Data sets from T3, T2 (24-month follow-up) and T1 (12-month follow-up) were superimposed with baseline in a 3D analysis software (GOM Inspect). Wear was quantified as maximum vertical tissue loss (µm; median, 95% CI) in various occlusal areas (4/5 cusps and 2 ridges). Morphologies were classified into cupping (C), facet (F), and combined cupping-facet (CF). Aetiological factors were assessed with questionnaires.
RESULTS: Wear increased at T3 significantly at low rates in all areas of the occlusal surface (median between 7.0 (4.0;10.5) and 9.5 (6.0;15.0) µm). There was a clear trend for higher loss values in males, but no association with other factors such as nutrition. C and CF showed significantly higher loss values than F. Areas without initial wear developed F first, which either persisted or developed into C and CF.
CONCLUSIONS: Wear continued at low rates with C/CF morphology and sex as significant factors. Cupped lesions seem to develop from facets and thus may not be a valid diagnostic criterion for erosive tooth wear.
CONCLUSIONS: Wear is a cumulative process that apparently follows complex mechanisms that cannot be conceptualized in simplified terms; C and CF may be indicators for higher progression rates.
METHODS: Molars (FDI #36 or #46) of 74 participants (23.8 ± 2.2 years) were scanned (Trios 3, 3Shape) at the third follow-up (T3; observation period 1,111 ± 10 days). Data sets from T3, T2 (24-month follow-up) and T1 (12-month follow-up) were superimposed with baseline in a 3D analysis software (GOM Inspect). Wear was quantified as maximum vertical tissue loss (µm; median, 95% CI) in various occlusal areas (4/5 cusps and 2 ridges). Morphologies were classified into cupping (C), facet (F), and combined cupping-facet (CF). Aetiological factors were assessed with questionnaires.
RESULTS: Wear increased at T3 significantly at low rates in all areas of the occlusal surface (median between 7.0 (4.0;10.5) and 9.5 (6.0;15.0) µm). There was a clear trend for higher loss values in males, but no association with other factors such as nutrition. C and CF showed significantly higher loss values than F. Areas without initial wear developed F first, which either persisted or developed into C and CF.
CONCLUSIONS: Wear continued at low rates with C/CF morphology and sex as significant factors. Cupped lesions seem to develop from facets and thus may not be a valid diagnostic criterion for erosive tooth wear.
CONCLUSIONS: Wear is a cumulative process that apparently follows complex mechanisms that cannot be conceptualized in simplified terms; C and CF may be indicators for higher progression rates.
摘要：
目的：该研究继续我们对磨损的纵向观察，旨在进一步监测进展和病变形态，并确定与假定的病因因素的关系。
方法：在第三次随访（T3；观察期1,111±10天）时，对74名参与者（23.8±2.2年）的磨牙（FDI＃36或＃46）进行了扫描（Trios3，3Shape）。在3D分析软件(GOMInspect)中,将来自T3、T2(24个月随访)和T1(12个月随访)的数据集与基线叠加。磨损量化为最大垂直组织损失(µm；中位数，95%CI）在各个咬合区域（4/5尖点和2脊）。形态分为拔罐（C），刻面(F)，和组合拔罐方面（CF）。通过问卷调查评估病因。
结果：在咬合面的所有区域中，在T3时磨损率显着增加（中位数在7.0（4.0;10.5）和9.5（6.0;15.0）µm之间）。男性的损失值有明显的趋势，但与营养等其他因素无关。C和CF显示出明显高于F的损失值。没有初始磨损的区域首先发展为F，要么持续存在，要么发展成C和CF。
结论：以C/CF形态和性别为重要因素，穿着率较低。杯状病变似乎是从小平面发展而来的，因此可能不是侵蚀性牙齿磨损的有效诊断标准。
结论：磨损是一个累积过程，显然遵循复杂的机制，不能简单地概念化；C和CF可能是更高进展率的指标。
方法：在第三次随访（T3；观察期1,111±10天）时，对74名参与者（23.8±2.2年）的磨牙（FDI＃36或＃46）进行了扫描（Trios3，3Shape）。在3D分析软件(GOMInspect)中,将来自T3、T2(24个月随访)和T1(12个月随访)的数据集与基线叠加。磨损量化为最大垂直组织损失(µm；中位数，95%CI）在各个咬合区域（4/5尖点和2脊）。形态分为拔罐（C），刻面(F)，和组合拔罐方面（CF）。通过问卷调查评估病因。
结果：在咬合面的所有区域中，在T3时磨损率显着增加（中位数在7.0（4.0;10.5）和9.5（6.0;15.0）µm之间）。男性的损失值有明显的趋势，但与营养等其他因素无关。C和CF显示出明显高于F的损失值。没有初始磨损的区域首先发展为F，要么持续存在，要么发展成C和CF。
结论：以C/CF形态和性别为重要因素，穿着率较低。杯状病变似乎是从小平面发展而来的，因此可能不是侵蚀性牙齿磨损的有效诊断标准。
结论：磨损是一个累积过程，显然遵循复杂的机制，不能简单地概念化；C和CF可能是更高进展率的指标。
