Brin I, Ben-Bassat Y
Department of Orthodontics, Hebrew University Hadassah Faculty of Dental Medicine, Jerusalem, Israel.
Am J Phys Anthropol. 1989 Sep;80(1):25-9. doi: 10.1002/ajpa.1330800104.
A labiogingival notch appearing on the enamel of maxillary central incisors seems to be a potential factor for compromised gingival and dental health. The objective of the survey was to describe the phenomenon and its prevalence in a random Israeli population. One thousand eight hundred eighty children with fully erupted permanent incisors were clinically examined. The appearance of the labiogingival notch on the enamel surface of the maxillary central incisors was determined. Two depth categories of the phenomenon were distinguished by probing. The possible differences in the prevalence of the labial notch appearance, between the sexes as well as between the right and left sides, were statistically evaluated. The prevalence between the right and left sides, were statistically evaluated. The prevalence of the labial notch on at least one incisor in the population examined was 6.5% (5.1% unilaterally and 1.4% bilaterally). No significant difference between the sexes regarding the appearance of this phenomenon was found. The shallow notch was similarly distributed between the right and left sides in both sexes. However, the deeper malformations appeared significantly more on the left side in boys (P less than 0.05) and in girls (P less than 0.01). The gingivae tended to follow the enamel contour; however, only in few cases was gingival inflammation or incipient caries diagnosed. It was concluded that the labio-gingival notch is not a rare phenomenon, and it should be given special attention to prevent possible damage to the dental and gingival tissues.
上颌中切牙牙釉质上出现的唇龈沟似乎是牙龈和牙齿健康受损的一个潜在因素。该调查的目的是描述这一现象及其在以色列随机人群中的患病率。对1880名恒牙完全萌出的儿童进行了临床检查。确定上颌中切牙牙釉质表面唇龈沟的出现情况。通过探查区分该现象的两种深度类别。对唇沟出现的患病率在性别之间以及左右两侧之间的可能差异进行了统计学评估。对左右两侧之间的患病率进行了统计学评估。在所检查的人群中，至少一颗切牙出现唇沟的患病率为6.5%（单侧为5.1%，双侧为1.4%）。未发现该现象在性别之间的出现有显著差异。浅沟在男女两侧的分布相似。然而，较深的畸形在男孩左侧出现的显著更多（P小于0.05），在女孩左侧出现的也显著更多（P小于0.01）。牙龈倾向于遵循牙釉质轮廓；然而，仅在少数情况下诊断出牙龈炎症或早期龋齿。得出的结论是，唇龈沟并非罕见现象，应予以特别关注，以防止对牙齿和牙龈组织造成可能的损害。
