Hampe Tristan, Krohn Sebastian, Schmitt Franziska, Kubein-Meesenburg Dietmar
Poliklinik für Zahnärztliche Prothetik, Universitätsmedizin Göttingen, Robert-Koch-Str. 40, 37075, Göttingen, Germany.
J Orofac Orthop. 2020 Mar;81(2):89-99. doi: 10.1007/s00056-019-00213-6. Epub 2020 Jan 31.
The aim of this study was to examine possible parameters correlating to the shape of the curve of Spee (COS) by analyzing multiple setups of the same Angle class I patient case.
In all, 65 setups of the same Angle class I patient case were constructed. We measured the depth of the COS, length and width of the dental arch, steps, rotations, spaces and symmetry of the constructed setups. With a correlation analysis, possible relationships between the depth of the COS and measured parameters were evaluated.
The COS in the constructed setups was more exaggerated than in the reference case but none of the measured parameters correlated to the depth of the COS. The largest deviation was found on the mesiobuccal cusp tip of the first molar (-0.5 ± 0.4 mm left side; -0.8 ± 0.5 mm right side). This study found a negative correlation between the length and width of the lower dental arch (r = -0.61). While maintaining Angle class I, a large spread width of the depth of the COS, the dental arch width and length was shown.
The different manifestations of the COS in this study show the freedom of arrangement of the individual tooth morphology without exhibiting a correlation to parameters of the dental arch.
本研究旨在通过分析同一安氏I类患者病例的多种模型设置，研究与司皮曲线（COS）形态相关的可能参数。
总共构建了同一安氏I类患者病例的65种模型设置。我们测量了COS的深度、牙弓的长度和宽度、台阶、旋转、间隙以及构建模型设置的对称性。通过相关性分析，评估了COS深度与测量参数之间的可能关系。
构建模型设置中的COS比参考病例中的更明显，但没有一个测量参数与COS的深度相关。最大偏差出现在第一磨牙的近中颊尖（左侧为-0.5±0.4mm；右侧为-0.8±0.5mm）。本研究发现下颌牙弓的长度和宽度之间存在负相关（r = -0.61）。在保持安氏I类的情况下，COS深度、牙弓宽度和长度的分布范围较大。
本研究中COS的不同表现表明，个体牙齿形态的排列具有自由度，且与牙弓参数无相关性。
