牙周病患者龈组织中6－K－PGF_1a放免测定和免疫组化定位及定量分析

本实验采用放射免疫测定法（ＲＩＡ）测定了成人牙周炎（ＡＰ）、青少年牙周炎（ＪＰ）、龈炎（Ｇ）和健康人（Ｈ）（各１０例）龈组织中６－酮－前列腺素Ｆｉａ（６－Ｋ－ＰＧＦ＿１ａ）的含量，用免疫组织化学ＡＢＣ染色对同一标本中的６－Ｋ－ＰＧＦ＿１ａ定位，用显微分光光度计（ＭＳＰ）对染色标本定量，与ＲＩＡ结果比较，以探讨６－Ｋ－ＰＧＦ＿１ａ与牙周病的关系。ＲＩＡ结果表明：牙周病患者龈组织中６－Ｋ－ＰＧＦ１ａ含量从Ｈ、Ｇ、ＡＰ到ＪＰ呈递增趋势，各病变组与Ｈ皆有显著差异，ＪＰ与Ｇ组有显著差异，ＡＰ与Ｐ也有显著差异。ＡＢＣ染色表明龈组织中６－Ｋ－ＰＧＦ＿１ａ主要的分泌细胞为血管内皮细胞、巨噬细胞、浆细胞、多形核白细胞及个别的腺管内皮细胞等。对牙龈组织６－Ｋ－ＰＧＦ＿１ａ的ＭＳＰ定量结果与ＲＩＡ相似，两方法可相互补充。提示对６－Ｋ－ＰＧＦ＿１ａ与牙周病关系的研究有重要意义。     

内毒素诱导单核—巨噬细胞产生细胞因子的作用机理

内毒素刺激巨噬细胞产生，ＴＮＦ－α，ＩＬ－１，ＩＬ－６，ＩＬ－８，补体Ｃ３前列腺素（ＰＧ）等生物活性物质，在机体内发挥多种生物学，免疫学效应，细胞膜蛋白家族成人员之一的ＣＤ１４在内毒素诱导单核－巨噬分泌细胞因子的过程中起着重要作用，ＣＤ１４与ＬＰＳ－ＬＰＳ结合蛋白复合体（ＬＰＳ－ＬＢＰ）的结合发挥受体功能，抗ＣＤ１４抗体能够阻断ＬＰＳ－ＬＢＰ与单核细胞膜表面的结合，从而抑制细胞因子的产生。     

细胞间粘附分子1及其受体在成人牙周炎袋上皮区的表达

目的 探讨成人牙周炎牙龈组织中白细胞通过上皮进入龈沟液的粘附机制。方法 采用碱性磷酸酶－抗碱性磷酸酶免疫组化方法，对细胞间粘附分子／白细胞功能相关抗原１在正常牙龈和成人牙周炎牙龈组织中的表达进行研究。结果 正常牙龈和成人牙周炎牙龈的结合上皮，沟内／袋上皮根部均表达ＩＣＡＭ－１，且染色强度呈方向变化；ＬＦＡ－１仅局限表达于白细胞表面，成人牙周炎袋上皮下方结缔组织及袋上皮细胞间隙中ＬＦＡ－１阳性白细胞     

用核酸杂交法研究人类乳头瘤病毒与口腔癌的相关性

以放射性核素￣（３２）Ｐ标记ＨＰＶ１１、ＨＰＶ１６、Ｅ＿６和ＨＰＶ１８ＤＮＡ探针，用核酸斑点杂交法，检测了部分口腔恶性肿瘤组织中的ＨＰＶ相关序列。（１）用ＨＰＶ１１探针检测１２例，其中口腔粘膜鳞状细胞癌（ｓｑｕａｍｏｕｓｃｅｌｌｃａｒｃｉｎｏｍａ，ＳＣＣ）８例，涎腺腺样囊性癌（ａｄｅｎｏｉｄｃｙｓｔｉｃｃａｒｃｉｎｏｍａ，ＡＣＣ）２例，涎腺多形性腺瘤恶变（ｍａｌｉｇｎａｎｔｐｌｅｏｍｏｒｐｈｉｃａｄｅｎｏｎｉａ，ＭＰＡ）１例，软组织胚胎性横纹肌肉瘤（ｅｍｂｒｙｏｉｄｒｈａｂｄＯｍｖｏｓａｒｃｏｍａ，ＥＲＳ）１例；结果阳性５例（５／１２），弱阳性１例，６例为阴性。（２）用ＨＰＶ１６Ｅ＿６探针检测１０例，其中ＳＣＣ６例，ＡＣＣ２例，ＭＰＡ１例，ＥＲＳ１例；结果阳性６例（６／１０），弱阳性１例，３例为阴性。（３）用ＮＰＶ１８探针检测１２例，肿瘤类型及例数同ＨＰＶ１１检测组，结果阳性３例（３／１２），阴性９例（９／１２），非肿瘤对照组共４例（唇、腭裂各２例），除１例唇裂出现了与ＨＰＶ１１和ＨＰＶ１６Ｅ＿６杂交呈弱阳性外，余均为阴性。     

牙周病患者牙龈组织中PGE_2、6-K-PGF_(1a)和TXB_2定量分析及与牙周病的关系

目的：探讨牙龈组织中前列腺素Ｅ２（ＰＧＥ２）、６－酮－前列腺素Ｆ１ａ和血栓素Ｂ２（ＴＸＢ２）与牙周病的关系．方法：选２０例牙周炎患者,１０例牙龈炎患者和１０例健康龈,分别用放免测定（ＲＩＡ）和免疫组化定量法对牙龈组织中ＰＧＥ２、６－Ｋ－ＰＧＦ１ａ和ＴＸＢ２定量．结果：牙周病患者牙龈组织中ＰＧＥ２含量最多,ＴＸＢ２次之,６－Ｋ－ＰＧＦ１ａ含量最少．牙周炎和牙龈炎组中的ＰＧＥ２、６－Ｋ－ＰＧＦ１ｄ和ＴＸＢ２含量与健康龈组比有显著性差异,牙周炎组中的ＰＧＥ２、６－Ｋ－ＰＧＦ１ａ和ＴＸＢ２量明显高于牙龈炎组．牙龈组织中的ＰＧＥ２、６－Ｋ－ＰＧＦ１ａ和ＴＸＢ２含量均从健康组、牙龈炎组到牙周炎组递增,免疫组化定量法对牙龈组织中前列腺素的测定结果与放免测定一致．结论：牙周病患者牙龈组织中的ＰＧＥ２、６－Ｋ－ＰＧＦ１ａ和ＴＸＢ２含量与牙周指数明显相关,前列腺素在牙周病发生中起重要作用,免疫组化与放免测定法结合能更好地探讨前列腺素与牙周病的关系     

涎腺肌上皮瘤与肌上皮癌中c－erbB－2癌基因的表达与p53基因突变的研究

为了探讨癌基因在肌上皮肿瘤中的过度表达及其意义，作者采用ｃ－ｅｒｂＢ－２癌基因蛋白与ｐ５３基因蛋白的单抗（ＤＯ－１）研究１４例肌上皮瘤与６例肌上皮癌。结果发现，５／６例肌上皮癌与９／１４例肌上皮瘤均过度表达ｃ－ｅｒｂＢ－２癌基因蛋白；５例瘤旁腺体内导管上皮细胞也过度表达ｃ－ｅｒｂＢ－２。因此推测，ｃ－ｅｒｂＢ－２癌基因可能作为一种启动基因，与肌上皮肿瘤的发生有着密切的联系。ｐ５３基因蛋白研究发现，肌上皮癌（５／６例）反应阳性，肌上皮瘤（０／１４例）全部反应阴性。作者认为，ｐ５３基因突变可能在肌上皮癌的形成过程中起着重要作用     

涎腺肌上皮瘤与肌上皮癌中c—erbB—2癌基因的表达与p53基因突…

为了探讨癌基因在肌上皮肿瘤中的过度表达及其意义，作者采用ｃ－ｅｒｂＢ－２癌基因蛋白与ｐ５３基因蛋白的单抗（ＤＯ－１）研究１４例肌上皮瘤与６例肌上皮癌。结果发现，５／６例肌上皮癌与９／１４例肌上皮瘤均过度表达ｃ－ｅｒｂＢ－２癌基因蛋白；５例瘤旁腺体内导管上皮细胞也过度表达ｃ－ｅｒｂＢ－２。因此推测，ｃ－ｅｒｂＢ－２癌基因可能作为一种启动基因，与肌上皮肿瘤的发生有着密切的联系。ｐ５３基因蛋白研究发现，     

牙周病患者龈组织中6—K—PGF1a放免测定和免疫组化定位及…

本实验采用放射免疫测定法（ＲＩＡ）测定了成人牙周炎（ＡＰ），青少上牙周炎（ＪＰ），龈炎（Ｇ）和健康人（Ｈ）（各１０例）龈组织中６－酮－前列腺素Ｆ１ａ（６－Ｋ－ＰＧＦ１ａ）含量，用免疫组织化学ＡＢＣ染色对同一标本中的６－Ｋ－ＰＧＦ１ａ定位，用显微分光光度计（ＭＳＰ）对染色标本定量，与ＲＩＡ结果比较，以探讨６－Ｋ－ＰＧＦ１ａ与牙周病的关系。ＲＩＡ结果表明：牙周病患者龈组织中６－Ｋ－ＰＧＦ１ａ含量从Ｈ，     

P53、bcl-2和ki-67蛋白表达与涎腺腺样囊性癌关系

目的 探讨Ｐ５３,ｂｃｌ－２和ｋｉ－６７在腺样囊性癌（ＡＣＣ）中的表达及临床意义,方法 应用免疫组化方法,观察２０例ＡＣＣ石蜡包埋组织中Ｐ５３,ｂｃｌ－２和ｋｉ－６７蛋白表达。结果 Ｐ５３,ｂｃｌ－２和ｋｉ－６７的阳性表达率分别为５０％,７０％和８０％,Ｐ５３,和ｋｉ－６７阳性率在不同ＡＣＣ组织亚型中存有差异（Ｐ〈０．０５）,ｂｃｌ－２阴性表达者３年死亡率高于阳性表达患者（Ｐ〈０．０１）,ｋｉ－６     

牙龈组织中前列腺素与牙周病的关系

牙龈组织中前列腺素与牙周病的关系陈铁楼周以钧吴织芬金岩前列腺素（Ｐｒｏｓｔａｇｌａｎｄｉｎｓ，ＰＧｓ）能诱发大鼠牙槽骨吸收，牙周炎患者牙周脓性分泌物中前列腺素Ｅ２（ＰＧＥ２）含量升高。本研究的目的是用不同方法对牙周病患者牙龈组织中的ＰＧＥ２，６－酮－...     

In vitro phagocytosis by crevicular phagocytes in various forms of periodontitis.

Phagocytes from the gingival crevice fluid (CF-cells) of 11 patients with localized juvenile and post-juvenile periodontitis (LJP/PJP), 14 with rapidly progressive periodontitis (RPP), 11 with adult periodontitis (AP), and 14 controls without periodontal disease were examined. Phagocytic activity in vitro was assessed. Crevicular washings were obtained from healthy sites of controls and diseased sites of patients after completion of the oral hygiene phase (professional and home care). The cells were carefully processed to avoid mechanical damage. The in vitro phagocytosis by uptake of opsonized C. albicans was performed in a moist chamber (30 minutes, 37 degrees C) and examined by light microscopy. CF-cells were differentiated on the basis of their morphological appearance. The majority of cells in crevicular washings were PMNs, some macrophages, and few lymphocytes. Phagocytic activity in patients with LJP/PJP and RPP was significantly decreased in comparison with that from AP and the control group. The decreased percentage of cells phagocytosing opsonized C. albicans was associated with the enhanced adherence of opsonized C. albicans. Moreover cell viability of CF-cells from LJP/PJP sites was significantly reduced. The data from the present study suggest that the in vitro phagocytosis of crevicular phagocytes in juvenile and rapidly progressive periodontitis lesions is diminished.     

Gingival crevicular fluid of patients with gingivitis or periodontal disease: evaluation of elastase-α, proteinase inhibitor complex

Elastase-alpha 1 proteinase inhibitor (E alpha 1PI) concentrations were assessed in gingival crevicular fluids and evaluated in relation to the clinical signs of periodontal disease. 7 gingivitis patients (group G), 38 patients with adult periodontitis and clinically stable lesions (group AP), 21 patients with rapidly progressive periodontitis and clinically stable lesions (group RPP) and 11 patients with either adult periodontitis or rapidly progressive periodontitis and clinically progressive lesions (group Pr) were studied. 6 healthy subjects served as the control group (group H). Significantly differences were observed in the E alpha 1PI concentration between the healthy, gingivitis, clinically stable periodontitis and clinically progressive periodontitis group. In the control group, no E alpha 1PI was detected. Groups G, AP and RPP showed mean E alpha 1PI concentrations of 10.95 +/- 4.96 micrograms/ml, 35.55 +/- 18.64 micrograms/ml and 38.56 +/- 20.89 micrograms/ml, respectively. In these groups, high enzyme levels were correlated with clinical signs of inflammation. The highest E alpha 1PI levels were observed in the clinically progressive lesions. However, they were not necessarily associated with bleeding on probing or clinical evidence of inflammation. These data suggest that a significant increase in crevicular E alpha 1PI levels may be an early manifestation of a progressive or potentially progressive periodontal lesion.     

Relative proportions of mononuclear cell types in periodontal lesions analyzed by immunohistochemistry

In this study, we investigated the relative proportions of infiltrating mononuclear inflammatory cells in sections of granulation tissue from periodontitis lesions in both adult periodontitis (AP) and early onset periodontitis (EOP) patients. We utilised a set of cluster of differentiation (CD) antigen-specific monoclonal antibodies to detect different cell types within the tissues. These included anti-CD 20 (B cells), anti-CD 3 (pan T cells) and anti-CD 45RO (memory T cells), anti-CD 4 (helper T cells) anti-CD 8 (suppressor T cells) and anti-CD 68 (monocyte/macrophage). Biopsies of granulation tissue were obtained from 9 patients with adult periodontitis (AP), from 10 patients with early onset periodontitis (EOP) and for comparative purposes, biopsies of gingival tissue from 4 patients with AP. A significantly greater number of T cells (p < 0.05) were observed in EOP and gingival sections than in AP sections. In addition, a greater number of B cells were observed in the granulation tissues than in the gingiva (p < 0.05). The relative numbers of B cells (CD 20). T cells (CD 3) and macrophages (CD 68) were expressed as a percentage of their combined total for each of the patient groups and indicated that the proportion of B lymphocytes was greater in AP sections than in EOP or gingival sections (p < 0.02). The proportion of T cells was lower in the AP periodontitis sections than in the EOP periodontitis sections (p < 0.05). There were no significant differences in the proportion of macrophages between the 3 categories of tissue specimens. The relative ratios of B cells (CD 20) to T cells (CD 3) and B cells (CD 20) to memory T cells (CD 45RO) and macrophages (CD 68) to T cells (CD 3) and memory T cells (CD 45RO) were analyzed and indicated that there was a significant increase in the B to T cell ratio in AP sections compared to EOP and gingival sections (p < 0.02). There was also a significant increase in the macrophage to T cell ratio in AP sections as indicated by CD 68 to CD 3 ratios (p < 0.05). There were no differences regarding the relative proportions of memory T cells or in the ratios of CD 4+ to CD 8+ T cells in the different disease categories. In conclusion, these differences in the relative proportions of B cells, T cells and macrophages may reflect a difference in the immunopathology of AP and EOP.     

The role of IL-1 beta and TNF-alpha in hyper-reactivity of neutrophils in rapidly progressive periodontitis patients]

OBJECTIVE: Neutrophils (PMNs) from rapidly progressive periodontitis (RPP) was found to generate abnormally high levels of oxygen radicals. Elastase activity in gingival crevicular fluid (GCF) from RPP was also found much higher. It suggested that PMNs in some RPP patients are hyper-reactive. The purpose of this study was to investigate the mechanism of PMN hyper-reactivity by surveying the correlation of TNF-alpha level with elastase activity in GCF and by evaluating the association between PMN infiltration and the expression of IL-1 beta and TNF-alpha in gingival tissues from RPP patients. METHODS: 41 GCF samples from 22 RPP patients and 34 GCF samples from 11 healthy controls were collected. The total amount of TNF-alpha in GCF was detected using ELISA. The elastase activity was measured with a low molecular weight substrate (S2484) specific for granulocyte. The correlation of TNF-alpha level with elastase activity in a GCF sample was analyzed with Spearman correlation. 20 gingival specimens were obtained respectively from 10 RPP patients and 5 periodontally healthy controls. The expression of IL-1 beta and TNF-alpha was detected with immunohistochemistry. The distribution of PMN was observed with hematoxylin and eosin staining. RESULTS: Total amount of TNF-alpha in GCF was positively correlated with elastase activity (r = 0.44, P < 0.05). The IL-1 beta- and TNF-alpha-positive cells in gingiva were superimposed in areas where PMNs infiltration predominant. CONCLUSION: The hyper-reactivity of PMN in RPP patients was related to locally produced IL-1 beta and TNF-alpha.     

Polymorphonuclear neutrophils and their mediators in gingival tissues from generalized aggressive periodontitis.

BACKGROUND: Impaired polymorphonuclear neutrophil (PMN) functions were generally considered to be related to the onset of generalized aggressive periodontitis (GAgP). However, some research has indicated that the hyperreactivity of PMN seems to be involved in the inflammatory response of GAgP. The present study's main purpose was to provide more evidence about the role of PMN in the pathogenesis of GAgP by surveying PMN infiltration in gingiva and its relationship with the expression of their mediators including intercellular adhesion molecule-1 (ICAM-1), interleukin-8 (IL-8), interleukin-1beta (IL-1beta), and tumor necrosis factor-alpha (TNF-alpha). The inflammatory response in GAgP was also compared with that in adult periodontitis (AP) and periodontally healthy subjects. Since these PMN mediators were reported to be produced mainly by macrophages, the association between the expression of these PMN mediators and the distribution of macrophages was also investigated. METHODS: A total of 25 gingival specimens were obtained from 10 GAgP patients, 10 AP patients, and 5 periodontally healthy subjects. Serial sections were obtained from each specimen, and the following techniques were adopted to investigate the distribution and interrelation of different cells and cytokines. Infiltration of PMN was observed by using hematoxylin and eosin staining. Distribution of the macrophages, identified as CD68+, was shown by using immunohistochemistry. Immunohistochemistry and in situ hybridization were used to detect the expression of ICAM-1, IL-8, IL-1beta, and TNF-alpha in gingival tissues. These techniques were performed in serial sections from each individual specimen. RESULTS: Large numbers of infiltrating PMNs were observed in gingiva from GAgP. In gingiva from both GAgP and AP, the strongest protein and mRNA expression of IL-8, ICAM-1, IL-1beta, and TNF-alpha were located in pocket epithelium and adjacent connective tissue with large numbers of infiltrating PMNs. In tissues without abundant PMN infiltration, the appearance of positive cells expressing IL-8, ICAM-1, IL-1beta, and TNF-alpha was scattered. CD68+ was distributed sparsely in connective tissue and was hardly seen in pocket epithelium with large numbers of PMN infiltration. The degree of leukocyte infiltration and connective tissue destruction in gingiva from GAgP patients was not distinctly different from that in gingiva from AP. The gingival specimens with heavy PMN infiltration from both GAgP and AP patients presented strong expressions of IL-1beta and TNF-alpha; showed more extensive inflammatory cell infiltration; had severe connective tissue destruction; and presented severe elongation and ulceration of pocket epithelium. In gingiva from healthy subjects, inflammation was minor with visually no PMN, CD68+, or the positive cells of IL-8, ICAM-1, IL-1beta and TNF-alpha expression. CONCLUSIONS: Enhanced accumulation of PMN, which is associated with the upregulation of IL-8, ICAM-1, IL-1beta, and TNF-alpha expression, relates to the severity and activity of GAgP. In addition to macrophages, PMN and/or epithelial cells might also be important sources of IL-8, IL-1beta, and TNF-alpha production in gingiva.     

Immunohistological and morphometric analysis of inflammatory cells in rapidly progressive periodontitis and adult periodontitis

The purpose of this study was to localize, characterize, and quantify in situ the inflammatory cells in the gingival connective tissue prior and subsequent to the initial therapy of ten patients with rapidly progressive periodontitis (RPP) and five patients with adult periodontitis (AP). Using immunohistological techniques, the amount of T lymphocytes, alphabeta-T lymphocytes, gammadelta-T lymphocytes, B lymphocytes, and plasma cells was determined at the beginning of the periodontal therapy (baseline) and at the time of periodontal surgery. Furthermore, the distribution of collagen types I, III, V, and VI was investigated using transmission electron microscopy. At baseline, patients with RPP revealed much higher numbers of inflammatory cells than patients with AP. During initial therapy of patients with RPP, the amount of T cells, alphabeta-T cells, and gammadelta-T cells was reduced significantly (P<0.05). Biopsies of patients with AP revealed a statistically significant reduction of all cell types, except alphabeta-T cells and gammadelta-T cells in the deep connective tissue. The transmission electron microscopy of biopsies from patients with RPP and AP with severe inflammation taken at baseline revealed that collagen types I and III were destroyed nearly completely in areas with leukocyte infiltration, whereas collagen types V and VI revealed a more pronounced labeling reaction. The results revealed that, during initial therapy, the amount of inflammatory cells was reduced significantly more in biopsies of patients with AP than in patients with RPP. At baseline, the inflamed gingival tissue consists mainly of collagen types V and VI in areas with infiltrates of inflammatory cells.     

Combined collagen membrane and hydroxyapatite/collagen chondroitin-sulfate spacer placement in the treatment of 2-wall intrabony defects in chronic adult and rapidly progressive periodontitis patients

Abstract This study, confined to non smokers, evaluated guided tissue regeneration in deep 2 wall intrabony defects using a diphenylphosphorylazide cross linked bovine type I collagen membrane supported by a hydroxyapatite' collagenychon droitinsulfate spacer in 43 adult periodontitis (AP) and 14 rapidly progressive periodontitis (RPP) patients, no more than 1 defect being randomly selected for each patient. Before surgery and 6 months after surgery, plaque (PI) and sulcus bleeding (SBI) indices, probing pocket depths (PPD), gingival margin locations (GML) and probing attachment levels (PAL) were recorded. During the post-surgical period, the biomaterials were well tolerated in all patients and PI and SBI were kept at a low level. Following therapy, there was a significant gain in PAL (4.2 mm for AP; 3 mm for RPP) and reduction in PPD (6.1 mm for AP; 4.7 mm for RPP) for both groups of patients (p<0.05). A significantly greater gain in PAL and reduction in PPD were observed for AP compared to RPP patients (p<0.05). The change in GML was not statistically different between groups (1.8 mm for AP; 1.6 mm for RPP). It is concluded that the combined use of a diphenylphos–phorylazide cross linked bovine type I collagen membrane, supported by a hydroxyapatite/collagen/chondroitin sulfate spacer, is beneficial in improving PAL and reducing PPD in 2 wall intrabony defects in both AP and RPP patients during the quiescent phase of the disease, with statistically better results for the former group. However, longer observation periods are necessary to evaluate the stability of the improvements obtained by this combined treatment approach between and for each group of patients.     

老年牙周炎牙龈组织Fas/Apo-1(CD95)抗原表达的免疫组织化学研究

目的 :观察慢性老年牙周炎牙龈组织中Fas/Apo - 1(CD95 )抗原表达和分布情况。方法 :采用免疫组织化学染色方法对 10例慢性老年牙周炎患者、10例慢性成人牙周炎患者、10例青少年牙周炎患者和 10例健康老年人牙龈组织中Fas/Apo - 1(CD95 )抗原阳性表达和分布情况进行了观察和比较。结果 :在慢性老年牙周炎组完整的牙龈鳞状上皮间桥、核周胞浆Fas/Apo - 1(CD95 )抗原阳性表达和结缔组织中淋巴细胞Fas/Apo - 1(CD95 )抗原阳性表达为 4组中最强 ;健康老年人组上皮角化层Fas/Apo - 1(CD95 )抗原阳性表达为 4组中最强 ;慢性成人牙周炎组和青少年牙周炎组结缔组织中淋巴细胞和吞噬细胞Fas/Apo - 1(CD95 )抗原阳性表达强于健康老年人组 ;慢性老年牙周炎组上皮细胞和上皮细胞的细胞间桥Fas/Apo - 1(CD95 )抗原阳性表达例数明显高于慢性成人牙周炎组和青少年牙周炎组 (P <0 .0 5 ) ;健康老年人组结缔组织中淋巴细胞和吞噬细胞Fas/Apo - 1(CD95 )抗原阳性表达例数明显低于其它 3组 (P <0 .0 5 )。结论 :由于感染性炎症和衰老的影响 ,①牙周炎患者和健康老年人牙龈组织中鳞状上皮凋亡细胞发生部位与身体其他器官鳞状上皮细胞凋亡发生部位不同 ;②在慢性老年牙周炎患者牙龈组织中上皮细胞和炎性细胞对细胞凋亡易感性     

Guided tissue regeneration using a collagen membrane in chronic adult and rapidly progressive periodontitis patients in the treatment of 3-wall intrabony defects

Abstract This study, confined to non-smokers, evaluated guided tissue regeneration using a diphenylphosphorylazide-cross-linked bovine type I collagen membrane in deep 3-wall intrabony defects in 52 adult periodontitis (AP) and 16 rapidly progressive periodontitis (RPP) patients, previously treated for the acute phase of the disease, no more than one defect being randomly selected for each patient. Before surgery and 6 months after surgery, plaque (PI) and sulcus bleeding (SBI) indices, as well as probing pocket depths (PPD), gingival margin locations (GML) and probing attachment levels (PAL) were recorded. During the post-surgical period, the membranes were very well tolerated in all patients and PI and SBI were kept at a low level. 6 months post-surgical, there was a significant gain in PAL (3.6 mm for AP: 2.6 mm for RPP) and reduction in PPD (5.5 mm for AP; 4.1 mm for RPP) for both groups of patients (p<0.05). However, neither the change in GML (1.9 mm for AP: 1.5 mm for RPP). nor PPD or PAL yielded a statistically significant difference between AP and RPP patients. The results of this study demonstrated that the treatment of deep 3-wall intrabony defects with a diphenylphosphorylazide-cross-Iinked collagen membrane in both AP and RPP patients during the quiescent phase of the disease is a treatment modality where the conquences are predictable. However, longer observation periods are necessary to evaluate the stability of the improvements obtained for the 2 groups of patients and the differences between them.     

IL-1基因多态性与牙周炎关系的研究

目的:研究中国汉族人IL-1 基因多态性与牙周炎易感性的关系。方法:收集30 例重度成人牙周炎(AP) 患者、20 例快速进展型牙周炎(RPP) 患者和94 例健康对照者的颊粘膜拭子,抽提DNA ,PCR-RELP 方法检测IL-1 基因簇基因多态性,比较三组患者各等位基因检出率的差异。结果:AP 组和RPP 组IL-1B + 3953PTaqI 等位基因Ⅱ的检出率均显著高于对照组(APP对照组OR = 618 ,RPPP对照组OR = 916 , P < 0105) ,AP 组IL-1RN 内含子2PVNTR 等位基因Ⅱ的检出率也显著高于对照组( OR = 613 , P < 0105) 。IL-1A-889PNcoI 等位基因在三组间的分布无显著性差异( P > 0105) 。结论:中国汉族人中携带IL-1B + 3953PTaqI 等位基因Ⅱ和IL-1RN 内含子2PVNTR 等位基因Ⅱ可能是牙周炎的遗传易感因素;AP 和RPP 存在遗传异质性。