时间标签：数据日期 2026-11-05 · 生成时间 2026-11-05 05:30（Asia/Shanghai）｜ 检索窗口 PubMed edat 2026/11/02 – 2026/11/06 ｜ 情报发生日期 2026-11-05
研究问题
It was not recorded whether the donated molars were maxillary or mandibular.
方法
(2016).Fundamental in vitro studies that isolate rotationally induced tooth damage are therefore necessary to understand how rotational forces contribute to the mechanical degradation of enamel, and how we can better interpret dental microwear signatures, for example, during dental microwear analysis.；Cyclic loading is applied using simplified axial–rotational contact conditions on minimally prepared occlusal enamel specimens, and the resulting damage is analyzed from a mechanistic perspective.；Tooth samples were stored hydrated (i.e., fully immersed in distilled water inside a sterile container) under refrigeration and kept as hydrated as possible throughout preparation.Mechanical tests were conducted by applying cyclic rotational forces to the occlusal enamel specimens using standardized laboratory equipment to ensure accuracy and reproducibility.
核心结论
Mandibular muscles can also generate additional motions, including rotation (Scott and Halcrow 2017; Smith and Burstone 1984; Grossnickle 2017; Bhullar et al. 2019), as demonstrated by (Yoshihara et al. 2025).；Previous work using this approach focused on synthetic materials for prosthetic crowns (e.g., zirconia, glass‐ceramics and composites) rather than natural enamel, and demonstrated that rotational forces produce distinct microwear patterns compared to axial‐lateral loading, with significant variations in wear resistance between materials as a function of their specific micro‐architecture (Sanchez‐Gonzalez et al. 2026).The present work explores, in a preliminary study, the effect of rotational loading on damage and wear in natural human enamel.；In particular, curved microscratch features reported in archaeological and fossil records suggest that additional loading modes—specifically rotational components—should be considered in dental microwear analyses.The present work simulates in vitro, for the first time, multiaxial cyclic contacts involving a rotational component on occlusal dental enamel, providing a preliminary investigation of the mechanics and severity of the resulting damage.
局限
However, all teeth were impacted/semi‐impacted, minimizing the influence of previous occlusal wear.；Due to technical limitations of the all‐electric system, external lubrication could not be applied, and all tests were conducted under ambient temperature/humidity (19°C–24°C and 40%–60% RH).FIGURE 2Schematic of the mechanical testing configuration involving rotational loading, performed on human enamel samples.；Black arrows in (B) indicate arc‐like grooves.4.DiscussionThe study of dental microwear provides an unparalleled lens into culture, behavior, and ecology in living, dead, and extinct organisms, but our understanding of how the fundamental mechanics of dental microwear develops is heavily biased by the limitations of our testing equipment.
对本项目的价值
中等价值：属「衰老机制与老年临床」方向；其他衰老相关栏目可用作本项目文献库与综述素材。 ｜ 价值分 2.6/5（★★★☆☆）
全文来源
Europe PMC fullTextXML（正文 47,791 字符，题名指纹 1.0，已过 DOI 关联 + 题名指纹 + 正文长度归属校验）
原文题录
- 中文题名：当牙齿扭转：旋转力导致釉质磨损的独特机制与模式——初步研究
- 英文标题：When Teeth Twist: Distinct Mechanisms and Patterns of Enamel Wear from Rotational Forces-A Preliminary Investigation.
- 期刊与标识：American journal of biological anthropology · PMID 42968434 · DOI 10.1002/ajpa.70374 · PMC PMC13725072