Department of Prosthetic Dentistry, Gerodontology and Biomaterials, University Medicine Greifswald, Germany.
Department of Prosthetic Dentistry, Gerodontology and Biomaterials, University Medicine Greifswald, Germany.
Ann Anat. 2023 Oct;250:152112. doi: 10.1016/j.aanat.2023.152112. Epub 2023 Jun 8.
The aim of our investigations is to optimize the anatomical basis for the design of a sufficient occlusal relationship, especially in view of the innovative technologies by analyzing the occlusal contact point patterns at cusp structures according to A-, B-, C- localization tooth by tooth on the individual occlusal surfaces in the posterior region in static habitual occlusal position.
In 3300 subjects of the population-based Study of Health in Pomerania (SHIP 1) the interocclusal registration in habitual intercuspation using silicone registration was used and analyzed by using the special evaluation software Greifswald Digital Analyzing System (GEDAS II). Chi square test was used to investigate whether the distribution of contact areas differed in the group of premolars or molars - each considered separately for maxilla and mandible - on the basis of the probability of error p < 0.05.
In 709 subjects (446 male with a mean age of 48.9 ± 13.04 years; 283 female with a mean age of 52.4 ± 14.23 years) the antagonistic situation was specifically considered on natural posterior teeth without conservative or restorative-prosthetic interventions, i.e. without caries, fillings, crowns or other restorations. On the basis of these subjects, the silicone registrations were analyzed using GEDAS II. For the first and second upper molars, the ABC contact distribution was the most frequent: 20.4 % for the first and 15.3 % for the second molar. The second most frequent contact area for maxillary molars was area 0. The upper molars had contact areas only at the maxillary palatal cusp (B-/C-contacts). This contact relationship was most frequent in the maxillary premolar (18.1-18.6 %). In mandibular premolars, with the buccal cusps areas A and B were frequently involved (15.4-16.7 %). Mandibular molars showed a frequent contact pattern involving all A-, B-, C- and 0- contact areas (13.3-24.2 %). To capture the possible influence of the antagonistic dentition situation, the antagonistic situation was specifically considered and except for the mandibular premolars (p < 0.05) the contact distribution did not differ for molars and maxillary premolars regarding the dental status of the antagonistic teeth. Natural posterior teeth without occlusal contacts were observed from 20.0 % in the second lower molars to 9.7 % in the first upper molars.
Our results suggest a clinically relevant due to the fact, that this study is the first population-based epidemiological study to analyze the occlusal contact point patterns at cusp structures according to A-, B-, C- localization tooth by tooth on the individual occlusal surfaces in the posterior region in static habitual occlusal position in order to optimize the anatomical basis for the design of a sufficient occlusal relationship.
我们的研究旨在根据 A、B、C 定位，对每颗牙齿在静态习惯性咬合位置的后牙个别咬合面的牙尖结构的咬合接触点模式进行分析，从而优化设计足够的咬合关系的解剖学基础。
在基于人群的波罗的海健康研究（SHIP 1）的 3300 名受试者中，使用硅橡胶注册进行习惯性咬合的咬合记录，并使用特殊评估软件格赖夫斯瓦尔德数字分析系统（GEDAS II）进行分析。卡方检验用于根据错误概率 p<0.05 检验在基于概率的错误概率 p<0.05 的情况下，在前磨牙或磨牙组（上颌和下颌分别考虑）中，接触区域的分布是否存在差异。
在 709 名受试者（446 名男性，平均年龄为 48.9±13.04 岁；283 名女性，平均年龄为 52.4±14.23 岁）中，具体考虑了无保守或修复治疗的天然后牙的拮抗情况，即无龋齿、填充物、牙冠或其他修复体。在此基础上，使用 GEDAS II 分析硅橡胶注册。对于第一和第二上颌磨牙，ABC 接触分布最常见：第一磨牙为 20.4%，第二磨牙为 15.3%。上颌磨牙的第二大常见接触区域是区域 0。上颌磨牙仅在腭侧牙尖（B-/C-接触）有接触区域。这种接触关系在上颌前磨牙中最为常见（18.1-18.6%）。在下颌前磨牙中，颊尖区域 A 和 B 经常涉及（15.4-16.7%）。下颌磨牙显示出一种常见的接触模式，涉及所有 A、B、C 和 0 接触区域（13.3-24.2%）。为了捕捉拮抗牙列情况的可能影响，具体考虑了拮抗牙列情况，除了下颌前磨牙（p<0.05）之外，磨牙和上颌前磨牙的接触分布不因拮抗牙齿的牙齿状况而不同。在第二下磨牙中观察到 20.0%的无咬合接触的天然后牙，在上颌第一磨牙中观察到 9.7%的无咬合接触的天然后牙。
我们的研究结果表明，这是一项基于人群的流行病学研究，首次分析了在静态习惯性咬合位置，在后牙个别咬合面的牙尖结构上，根据 A、B、C 定位，对每颗牙齿的咬合接触点模式，以优化设计足够的咬合关系的解剖学基础，具有重要的临床意义。
