School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil.
Department of Oral Implantology, Institute of Moraes, Rio de Janeiro, Brazil.
J Contemp Dent Pract. 2021 Mar 1;22(3):268-272.
To evaluate the active tactile sensitivity in individuals with complete natural dentition, determining the smallest thickness detected by the participants, and clarifying if there is a difference between the thicknesses analyzed.
Active tactile sensitivity was evaluated in 40 research participants. Inclusion criteria included participants with complete natural dentition, without active or history of periodontal disease, absence of temporomandibular disorders, bruxism, and restorations in the evaluated area. Exclusion criteria included age below 18 years. The active tactile perception threshold was evaluated by using carbon sheets of different thicknesses (0, 12, 24, 40, 80, 100, and 200 μm), which were inserted in the participants' premolars, bilaterally. The carbon sheet was inserted so as not to come into contact with the oral soft tissues. Subsequently, the participant occluded and was asked about the perception of the intraocclusal object 20 times in each occlusal contact. The collected data were tabulated considering the amount of positive and negative responses for each carbon thickness. Values of < 0.05 were considered significant.
The results showed that there was linearity in perception, on both sides, besides, the natural dentition was able to perceive difference in thickness from 12 μm.
We conclude that the 12 μm thickness is noticeable in occlusion and can be differentiated from other thicknesses in natural dentition and that there is no difference between the tactile sensitivity of the right and left sides.
A better understanding of active oral tactile sensitivity will contribute to numerous clinical applications in dentistry, including occlusal adjustment in dental rehabilitation, dental implants prosthesis design, and survival of prosthetic rehabilitation.
评估具有完整天然牙列的个体的主动触觉灵敏度，确定参与者检测到的最小厚度，并阐明分析的厚度之间是否存在差异。
对 40 名研究参与者进行主动触觉灵敏度评估。纳入标准包括具有完整天然牙列、无活动性或牙周病史、无颞下颌关节紊乱、磨牙症和评估区域修复体的参与者。排除标准包括年龄小于 18 岁。通过使用不同厚度的碳片（0、12、24、40、80、100 和 200 μm）评估主动触觉感知阈值，这些碳片插入参与者的前磨牙中，双侧。插入碳片时，不要使其与口腔软组织接触。随后，参与者咬合，并在每次咬合接触时询问 20 次对腔内物体的感知。考虑到每种碳厚度的阳性和阴性反应的数量，对收集到的数据进行制表。<0.05 的值被认为具有统计学意义。
结果表明，在两侧都存在感知的线性关系，此外，天然牙列能够感知 12 μm 厚度的差异。
我们得出结论，12 μm 的厚度在咬合时是可察觉的，可以与天然牙列中的其他厚度区分开来，并且左右两侧的触觉灵敏度没有差异。
更好地了解主动口腔触觉灵敏度将有助于口腔医学中的许多临床应用，包括牙科修复中的咬合调整、牙科植入物修复体设计以及修复体生存能力。
