Abstract:
:A great deal of controversy has existed in the periodontal literature as to whether the site or the subject should be the unit of analysis. Using the site as the unit of analysis assumes that observations of sites within the same subject are independent and ignores between subject variation. The purpose of this report is to evaluate the influence that the unit of analysis has on estimating the number of necessary site specific bacterial samples from each subject. The number of bacterial samples per subject was defined as the number of samples that would insure a clinician at a 95% confidence level that, if the bacteria were present in a subject, it would be discovered. From two data sets in which 20 to 30 bacterial samples were taken from each subject and data generated from a simulation, appropriate within-subject sample size was determined. In one data set the presence of Actinobacillus actinomycetemcomitans, Porphyromonas gingivalis, Bacteroides forsythus, and Prevotella intermedia was determined by indirect immunofluorescence. In the other data set the presence of A. actinomycetemcomitans, P. gingivalis, and P. intermedia was determined using DNA probes. Results of this study demonstrate that there is a large between subject variation in site specific bacterial prevalence, as indicated by an elevated intraclass correlation. Simulated data in this report demonstrated that the number of necessary bacterial samples per subject increased with increasing values of intraclass correlation. The number of necessary within subject samples also increased with decreasing prevalence rate. For A. actinomycetemcomitans, which had a low prevalence rate (0.11 to 0.18), the number of necessary samples per subject was very high (31 to 35).(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
J Periodontoljournal_title
Journal of periodontologyauthors
Gunsolley JC,Chinchilli VN,Savitt ED,Killoy W,Darack AP,Christersson LA,Fransson CF,Dunford RG,Zambon JJdoi
10.1902/jop.1992.63.6.507subject
Has Abstractpub_date
1992-06-01 00:00:00pages
507-14issue
6eissn
0022-3492issn
1943-3670journal_volume
63pub_type
杂志文章abstract:BACKGROUND:The objective of this study is to determine whether simvastatin consumption and hyperlipidemia are associated with a worse periodontal condition and specific bone activity biomarkers. METHODS:This cross-sectional and analytic study includes 73 patients divided into three groups: 1) simvastatin-treated patie...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2014.130652
更新日期:2014-10-01 00:00:00
abstract:BACKGROUND:Human periodontal ligament stem cells (hPDLSCs) are readily accessible and represent a promising source of mesenchymal stem cells (MSCs) for therapies. For expected clinical applications of stem cell therapies, prolonged maintenance of stemness of hPDLSCs after storage is crucial. Likewise, optimization of c...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2016.150693
更新日期:2016-07-01 00:00:00
abstract:BACKGROUND:Porphyromonas gingivalis is one of the major microbial pathogens associated with chronic periodontitis. To eradicate such pathogens by periodontal therapy, it is essential to clarify the source of infection. Recent findings suggest that the genotype of the fimbriae is one of the important factors in infectio...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2003.74.9.1355
更新日期:2003-09-01 00:00:00
abstract:BACKGROUND:Unsupervised clustering is a method used to identify heterogeneity among groups and homogeneity within a group of patients. Without a prespecified outcome entry, the resulting model deciphers patterns that may not be disclosed using traditional methods. This is the first time such clustering analysis is appl...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1002/JPER.20-0489
更新日期:2020-12-14 00:00:00
abstract::The clinical efficacy of minocycline in a subgingival local delivery system was evaluated alone (M) or as an adjunct to scaling and root planing (M + SRP), in comparison to scaling and root planing (SRP) or to no subgingival treatment (NoTx) in adult periodontitis. Fifty-one adult patients with > or = 7 mm periodontal...
journal_title:Journal of periodontology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1902/jop.1994.65.11.1058
更新日期:1994-11-01 00:00:00
abstract::The effects of twice weekly topical applications of hydrogen peroxide on the buccal epithelium of Syrian hamsters were studied. Animals were treated either with hydrogen peroxide alone, with hydrogen peroxide and the carcinogen 9, 10-dimethyl-1,2-benzanthracene (DMBA), or with DMBA alone. In animals treated with 30% H...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1986.57.11.685
更新日期:1986-11-01 00:00:00
abstract::The clinical, histopathologic and functional consequences of the genetic deficiency of leukocyte Mac-1, LFA-1 and p150,95 were assessed among three affected patients, heterozygotes and unaffected individuals among two generations of a single kindred. Longitudinal assessments of this family afforded the unique opportun...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1987.58.6.400
更新日期:1987-06-01 00:00:00
abstract::This study compared demineralized-unicortical-ilium-strips (DUIS) and an expanded polytetrafluoroethylene (ePTFE) physical barrier in combination with decalcified freeze-dried bone allograft (DFDBA) for treatment of Class II mandibular furcations. Twenty patients with adult periodontitis and at least 2 furcation invas...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1996.67.8.803
更新日期:1996-08-01 00:00:00
abstract::Cystatins are physiological inhibitors of cysteine proteinases and widely distributed in human tissues and fluids including saliva. Cystatins S, SA, SN, and D are only found in glandular saliva and tear fluid whereas cystatin C has been detected in all tested biological fluids. Previous studies demonstrated that total...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1996.67.3.205
更新日期:1996-03-01 00:00:00
abstract::Two cases of hemophilia in severely mentally retarded patients with drug-induced gingival hyperplasia are presented. The method of management in each case is described. A conservative approach is recommended in which tissue removals and only selected extractions are performed. It is also suggested that the sequela of ...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1978.49.1.44
更新日期:1978-01-01 00:00:00
abstract:BACKGROUND:The aim of this split-mouth study is to compare long-term (18 to 35 years) periodontal conditions of sites treated with gingival augmentation procedures (GAPs) and untreated homologous contralateral sites. METHODS:Forty-seven patients with 64 sites (test group), with lack of attached gingiva associated with...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2016.160284
更新日期:2016-12-01 00:00:00
abstract:BACKGROUND:Macrophages account for 5% to 30% of the inflammatory infiltrate in periodontitis and are activated by the classic and alternative pathways. These pathways are identified by indirect markers, among which interferon (IFN)-γ and interleukin-6 (IL)-6 of the classic pathway and IL-4 of the alternative pathway ha...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2013.130078
更新日期:2014-05-01 00:00:00
abstract::The dynamics of bone turnover in the furcations of teeth treated with expanded polytetrafluoroethylene (ePTFE) membranes were evaluated using multiple fluorochrome labels in 6 male beagle dogs. Loss of attachment involving the furcation area was induced in the second, third, and fourth premolar teeth using silk ligatu...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1994.65.1.84
更新日期:1994-01-01 00:00:00
abstract:BACKGROUND:Immediate functional loading is a new surgical-prosthetic technique that can be used extensively in implant placement. Because of a lack of experimental reports regarding edentulous maxilla, we decided to evaluate the survival rate of immediately loaded dental implants in this area. METHODS:Forty-three pati...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2005.76.6.1016
更新日期:2005-06-01 00:00:00
abstract:BACKGROUND:The purpose of this clinical study was to evaluate the possible influence of testosterone hormone on common clinical measurements of periodontal disease in men with hypergonadotropic hypogonadism. METHODS:Twenty-four hypergonadotropic hypogonadal men (H) and 24 systemically healthy men (S) were divided into...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2006.050286
更新日期:2006-07-01 00:00:00
abstract::The purpose of this study was to determine which treatment of a large osseous defect adjacent to an endosseous dental implant would produce the greatest regeneration of bone and degree of osseointegration: barrier membrane therapy plus demineralized freeze-dried bone allograft (DFDBA), membrane therapy alone, or no tr...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1997.68.10.933
更新日期:1997-10-01 00:00:00
abstract::A classical treatment for chronic adult periodontitis consists of four to six consecutive sessions of scaling and root planing at a 1- to 2-week interval. Such a so-called "quadrant or sextant therapy" might result in a reinfection of a previously disinfected area by bacteria from an untreated region. The purpose of t...
journal_title:Journal of periodontology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1902/jop.1996.67.12.1251
更新日期:1996-12-01 00:00:00
abstract:BACKGROUND:The purpose of this prospective study was to compare the changes in periodontal somatosensory function and microcirculation in patients with periodontitis following initial treatment with scaling and root planing (SRP) with or without adjuvant laser therapy. METHODS:Twenty-four patients suffering from perio...
journal_title:Journal of periodontology
pub_type: 杂志文章,随机对照试验
doi:10.1002/JPER.19-0562
更新日期:2020-10-01 00:00:00
abstract:BACKGROUND:Previous studies demonstrated significant variability in the histologic biologic width in periodontal health and mild periodontitis. The purpose of this study was to determine whether the previously established dimensions of the biologic width applied to subjects with severe, generalized, chronic periodontit...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2008.080066
更新日期:2008-10-01 00:00:00
abstract:BACKGROUND:Enhanced neutrophil responses play a critical role in the activation of the innate immune system and causation of aggressive periodontitis (AgP). The hypothesis that comprehensive periodontal treatment expedites resolution of amplified leukocyte activity and facilitates the reconstitution of periodontal heal...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2002.73.9.995
更新日期:2002-09-01 00:00:00
abstract:BACKGROUND:Prostaglandin E2 (PGE2) plays important roles in the pathogenesis of periodontal disease. Recent studies have revealed the existence of 2 isozymes of cyclooxygenase (COX), called COX-1 and COX-2. The purpose of the present study was to investigate the contribution of COX-1 and COX-2 to PGE2 production by hum...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2000.71.10.1575
更新日期:2000-10-01 00:00:00
abstract:BACKGROUND:Regenerative periodontal treatment aims to restore the attachment of the periodontal ligament and gingival collagen fibers to both the cementum of the root surface and alveolar bone. Fibroblasts are the predominant cells of the periodontal ligament and gingiva and have important roles in the function and reg...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2003.74.4.458
更新日期:2003-04-01 00:00:00
abstract::A study of a consanguineous family with a high prevalence of localized juvenile periodontitis (LJP) and generalized prepubertal periodontitis (GPP) was done over a 7-and-a-half year period. The parents had adult periodontitis, while 2 daughters, aged 13 and 15, had LJP. Furthermore, 2 other daughters, ages 14 and 10, ...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1992.63.5.457
更新日期:1992-05-01 00:00:00
abstract::A rotation flap for covering denuded single root surfaces with attached gingiva has been described and illustrated. This was performed utilizing a closed wound technique. The single flap provided attached gingiva coverage for a moderate area while a double flap provided coverage for a larger area. Although more attach...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1977.48.1.41
更新日期:1977-01-01 00:00:00
abstract:BACKGROUND:Metastases to the oral mucosa are rare, representing less than 1% of the tumors at this site. Most of these metastatic neoplasms originate in the lungs, kidneys, and liver. METHODS:The clinicopathologic features of an occult hepatocellular carcinoma, metastatic to the oral mucosa, are reported. The patient,...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2000.71.4.641
更新日期:2000-04-01 00:00:00
abstract::The interpretation of dental radiographs for the diagnosis of periodontal disease conditions poses several difficulties. These include the inability to adequately reproduce the projection geometry and optical density of the exposures. In order to improve the ability to extract accurate quantitative information from a ...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1983.54.7.435
更新日期:1983-07-01 00:00:00
abstract:BACKGROUND:The possible association between oral infection and chronic inflammation and cardiovascular disease risk has been studied intensively. The present study is designed to determine the strength of association between edentulism and angina pectoris in Mexican adults aged 35 years and older. METHODS:Using the to...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2013.130186
更新日期:2014-03-01 00:00:00
abstract::Langerhans cells (LC) are antigen-presenting cells which express high levels of Class II MHC antigens on their plasma membranes. While the expression of these antigens on gingival LC has been documented, their functional significance is unclear. In this study, the mixed epithelial cell-lymphocyte culture reaction (MEC...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1990.61.6.328
更新日期:1990-06-01 00:00:00
abstract:BACKGROUND:Maintaining normal weight, engaging in the recommended level of exercise, and eating healthy food are known to improve general health. The impact of these behaviors on periodontal health is not well documented. This study is aimed at examining whether the increased number of these behaviors is associated wit...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2005.76.8.1362
更新日期:2005-08-01 00:00:00
abstract::The purpose of this single blind clinical study was to determine the effects of two commerical mouthwashes (one containing cetylpyridinium chloride and domiphen bromide and the other containing only cetlypridinium chloride) on existing plaque accumulations. A second purpose was to determine if a residual effect could ...
journal_title:Journal of periodontology
pub_type: 临床试验,杂志文章
doi:10.1902/jop.1976.47.7.419
更新日期:1976-07-01 00:00:00