Vrahopoulos T P, Barber P M, Newman H N
Department of Periodontology, University of London, UK.
J Periodontol. 1992 Apr;63(4):243-52. doi: 10.1902/jop.1992.63.4.243.
THIS STUDY CONCERNS THE APICAL BORDER (AB) plaque in relation to chronic adult periodontitis (AP). Fifty-six teeth from 24 patients with AP were examined by transmission electron microscopy (TEM). The AB was not discrete with islands of bacteria in the so-called plaque-free zone (PFZ). Coronal to the AB, the established plaque commonly consisted of three to four layers of Gram-positive and Gram-negative cocci, rods, filaments, and spirochetes and a superficial layer, mainly of spirochetes, but including filaments, "test tube brush," and "corn-cob" formations. The most apical apparently intact organisms in the PFZ were in bacterial islands or in isolation and were predominantly Gram-negative cocci and rods, with occasional other morphotypes. The most apical microorganisms were invariably ghost cells. A cuticle of varying thickness and structure was present at the plaque/tooth interface. It was concluded that there was a limited range of intact bacterial morphotypes in the apical border plaque in chronic periodontitis.
本研究关注与成人慢性牙周炎（AP）相关的龈沟底菌斑（AB）。对24例慢性牙周炎患者的56颗牙齿进行了透射电子显微镜（TEM）检查。在所谓的无菌斑区（PFZ），龈沟底菌斑并非离散存在且有细菌岛。在龈沟底菌斑冠方，已形成的菌斑通常由三到四层革兰氏阳性和革兰氏阴性球菌、杆菌、丝状菌和螺旋体组成，还有一层表层，主要是螺旋体，但也包括丝状菌、“试管刷”和“玉米棒”结构。在PFZ中最靠近龈沟底表面看似完整的微生物存在于细菌岛中或单独存在，主要是革兰氏阴性球菌和杆菌，偶尔有其他形态类型。最靠近龈沟底的微生物总是无活力细胞。在菌斑与牙齿界面存在厚度和结构各异的角化层。得出的结论是，慢性牙周炎龈沟底菌斑中完整细菌形态类型的范围有限。
