Abstract:
BACKGROUND:Proper formation of cementum, a mineralized tissue lining the tooth root surface, is required for development of a functional periodontal ligament. Further, the presence of healthy cementum is considered to be an important criterion for predictable restoration of periodontal tissues lost as a consequence of disease. Despite the significance of cementum to general oral health, the mechanisms controlling development and regeneration of this tissue are not well understood and research has been hampered by the lack of adequate in vitro experimental models. METHODS:In an effort to establish cementoblast cell populations, without the trappings of a heterogeneous population containing periodontal ligament (PDL) cells, cells were obtained from the root surface of first mandibular molars of OC-TAg transgenic mice. These mice contain the SV40 large T-antigen (TAg) under control of the osteocalcin (OC) promoter. Therefore, only cells that express OC also express TAg and are immortalized in vitro. Based on results of prior in situ studies, OC is expressed by cementoblasts during root development, but not by cells within the PDL. Consequently, when populations are isolated from developing molars using collagenase/trypsin digestion, only cementoblasts, not PDL cells, are immortalized and thus, will survive in culture. RESULTS:The resulting immortalized cementoblast population (OC/CM) expressed bone sialoprotein (BSP), osteopontin (OPN), and OC, markers selective to cells lining the root surface. These cells also expressed type I and XII collagen and type I PTH/PTHrP receptor (PTH1R). In addition to expression of genes associated with cementoblasts, OC/CM cells promoted mineral nodule formation and exhibited a PTHrP mediated cAMP response. CONCLUSIONS:This approach for establishing cementoblasts in vitro provides a model to study cementogenesis as required to enhance our knowledge of the mechanisms controlling development, maintenance, and regeneration of periodontal tissues.
journal_name
J Periodontoljournal_title
Journal of periodontologyauthors
D'Errico JA,Berry JE,Ouyang H,Strayhorn CL,Windle JJ,Somerman MJdoi
10.1902/jop.2000.71.1.63subject
Has Abstractpub_date
2000-01-01 00:00:00pages
63-72issue
1eissn
0022-3492issn
1943-3670journal_volume
71pub_type
杂志文章abstract:BACKGROUND:Autologous bone grafts are usually well consolidated after 4 to 5 months but can be incompletely interlocked with the native bone. This study investigated the effect of acid demineralization of the graft-bed interface on graft consolidation. METHODS:Onlay bone grafts were performed on the calvaria of 36 gui...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2013.130298
更新日期:2014-05-01 00:00:00
abstract:BACKGROUND:Chronic exposure to occupational noise is reported to cause a wide range of health problems. But, there are no reports on studies investigating the association between noise exposure and periodontitis. The purpose of this study was to examine the relationship between occupational noise exposure and periodont...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1002/JPER.17-0484
更新日期:2018-04-01 00:00:00
abstract:BACKGROUND:Alanine aminopeptidase (ALAP) and dipeptidyl peptidase IV (DPPIV) are ectopeptidases that play a role in collagen degradation and are thought to be involved in the destruction of periodontal tissue. This study compared the activities of salivary ALAP and DPPIV in patients with periodontitis and periodontally...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2009.090233
更新日期:2009-11-01 00:00:00
abstract:BACKGROUND:Recently, a genetic marker (IL-1 genotype) that identifies individuals at higher risk for developing severe periodontal disease was discovered. A subgroup of the population reported on earlier was evaluated to determine if knowledge of the patient's IL-1 genotype would improve accuracy in assignment of progn...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1999.70.1.49
更新日期:1999-01-01 00:00:00
abstract:BACKGROUND:This prospective and controlled histologic study evaluates the impact of smoking on bone-to-implant contact, the bone density in the threaded area, and the bone density outside the threaded area around microimplants with anodized surface retrieved from human jaws. METHODS:A total of 24 subjects (mean age 51...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2010.090493
更新日期:2010-04-01 00:00:00
abstract:BACKGROUND:The detailed mechanism of osseointegration, the most appropriate implant-bone interface, remains unclear in jaw tissues at the ultrastructural level in contrast to the many reports using long bones. The present study reports on tissue response to titanium-implantation on an animal model using rat maxilla. M...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2000.71.2.287
更新日期:2000-02-01 00:00:00
abstract:BACKGROUND:The clinical success of root coverage with autogenous connective tissue (CT) or acellular dermal matrix (ADM) has been well documented. However, limited histological results of CT grafts have been reported, and a case report of a human block section has been published documenting an ADM graft. The purpose of...
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.2005.76.2.178
更新日期:2005-02-01 00:00:00
abstract:BACKGROUND:Infection and inflammation induce epigenetic changes that alter gene expression. In periodontal disease, inflammation, and microbial dysbiosis occur, which can lead to compromised barrier function of the gingival epithelia. Here, we tested the hypotheses that infection of cultured human gingival epithelial (...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1002/JPER.20-0262
更新日期:2020-10-01 00:00:00
abstract:BACKGROUND:Guided bone regeneration (GBR) has been widely utilized for the promotion of bone augmentation in bone loss areas. However, little information has been available regarding chronological changes in newly formed bone and alterations in the nature of newly formed bone after removal of a barrier membrane. The pr...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2000.71.3.341
更新日期:2000-03-01 00:00:00
abstract::An increased incidence of antibiotic-resistant bacteria and yeast overgrowth has been reported following various periodontal treatments. The objective of this study was to detect possible overgrowth of opportunistic bacteria and fungi as well as changes in normal microbiota after application of a biodegradable deliver...
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.1995.66.10.870
更新日期:1995-10-01 00:00:00
abstract::The morphotypes of the subgingival microflora from 85 12 to 18-year-old Finnish adolescents with insulin-dependent diabetes mellitus (IDDM) were studied in Gram- and Rhodes-stained smears. A comparison was made with subgingival plaque samples from paired age- and sex-matched healthy controls. Significant differences w...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1989.60.9.526
更新日期:1989-09-01 00:00:00
abstract::A 1% carrageenan solution was injected into the palatal mucosa of male guinea pigs between the two first molars. Biopsy specimens were taken 1, 3, 6, 12 and 24 hours after the injection. Control specimens with healthy mucosa and tyrode injected mucosa were used in order to evaluate the carrageenan-induced inflammation...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1979.50.3.114
更新日期:1979-03-01 00:00:00
abstract:BACKGROUND:Recently, brain-derived neurotrophic factor (BDNF)/high molecular weight hyaluronic acid (HMW-HA) complex with flap surgery has been shown to promote periodontal tissue regeneration. The objective of this study was to evaluate the effects of local subgingival application of BDNF/HMW-HA complex adjunctive to ...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1002/JPER.18-0070
更新日期:2019-01-01 00:00:00
abstract:BACKGROUND:Periodontists have found the gingival autograft to be an effective and predictable technique to increase the amount of attached gingiva around teeth, but this technique requires the surgeon to harvest donor tissue from a remote surgical site. The present study seeks to evaluate the safety and effectiveness o...
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.2005.76.6.867
更新日期:2005-06-01 00:00:00
abstract:BACKGROUND:Placement of endosseous dental implants in edentulous areas of the anterior maxilla poses a unique challenge due to variations in the amount of residual alveolar bone. Implant position becomes crucial in cases demanding high esthetic results but possessing minimal ridge width or in cases requiring augmentati...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2002.73.10.1202
更新日期:2002-10-01 00:00:00
abstract:BACKGROUND:To improve regenerative therapies, it is important to understand the cells and factors modulating periodontal tissues. Our group has focused on bone sialoprotein (BSP), a mineralized tissue-selective protein considered to be involved in the initiation of cementogenesis and osteogenesis. In this study, we exa...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2006.050057
更新日期:2006-02-01 00:00:00
abstract:BACKGROUND:In sinus augmentation, when remaining bone height is ≤5 mm, a lateral window approach is often the preferred choice; nonetheless, patients prefer to have a less invasive approach such as crestal sinus augmentation (CSA). Prior case reports have described the use of various staged approaches of a CSA techniqu...
journal_title:Journal of periodontology
pub_type:
doi:10.1002/JPER.18-0632
更新日期:2020-02-01 00:00:00
abstract::This review examines specific aspects of orthodontic treatment and periodontal health, namely the effects of orthodontic banded attachments on periodontal disease and more specifically the microflora found around the gingival margins. This review highlights critical developments in orthodontic techniques and microbiol...
journal_title:Journal of periodontology
pub_type: 杂志文章,评审
doi:10.1902/jop.1996.67.2.78
更新日期:1996-02-01 00:00:00
abstract:BACKGROUND:Patients with juvenile idiopathic arthritis (JIA) have been shown to have incipient attachment loss (AL) more frequently than systemically healthy individuals. This study investigated neutrophil activity and proinflammatory cytokines in these patients and aged-matched controls. METHODS:Elastase activity, me...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2005.76.1.75
更新日期:2005-01-01 00:00:00
abstract::THE MAXILLARY anterior region presents a difficult and unique therapeutic challenge to both the periodontist and restorative dentist. Although access for surgical and prosthetic procedures is certainly easiest in this part of the mouth, the problem of esthetics, in terms of increased tooth length and loss of interdent...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1981.52.4.208
更新日期:1981-04-01 00:00:00
abstract::This study examined histologic and histometric responses to 2 bioabsorbable membranes made from a synthetic copolymer of glycolide and lactide. They were tested for their biocompatibility, resorption characteristics, and ability to support periodontal regeneration. Expanded polytetrafluoroethylene (ePTFE) was used as ...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1994.65.6.583
更新日期:1994-06-01 00:00:00
abstract:BACKGROUND:The purpose of this single-masked, randomized, controlled clinical trial was to evaluate the effects of boric acid irrigation as an adjunct to scaling and root planing (SRP) on clinical and microbiologic parameters and compare this method with chlorhexidine irrigation and SRP alone in patients with chronic p...
journal_title:Journal of periodontology
pub_type: 杂志文章,随机对照试验
doi:10.1902/jop.2012.120467
更新日期:2013-09-01 00:00:00
abstract:BACKGROUND:Osseointegrated dental implants are currently recognized as a standard treatment method in dentistry. Titanium (Ti) and its alloys are the metals of choice for endosseous parts of currently available dental implants. Ti-6Al-4V is the most used Ti alloy, however; an improved version, Ti-6Al-7Nb, has been rece...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2002.73.8.900
更新日期:2002-08-01 00:00:00
abstract:BACKGROUND:Members of the matrix metalloproteinase (MMP) family are implicated in the chronic remodeling in periodontal diseases. Therefore, we performed a case-control study to investigate a plausible association between susceptibility to chronic periodontitis (CP) and the polymorphisms in the MMP-9 (gelatinase B) gen...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2006.050347
更新日期:2006-11-01 00:00:00
abstract::The relation between utilization of dental services from community dentists and the extent and severity of alveolar bone loss is reported for a panel of men followed for over 6 years. Oral health data were collected by the Department of Veterans Affairs, Dental Longitudinal Study, which began in 1969 and still continu...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1994.65.5s.551
更新日期:1994-05-01 00:00:00
abstract::Supragingival plaque and calculus indices, salivary flow rates, pH, ionic and total calcium concentrations, total phosphate concentration, and the number of cervical restorations and caries lesions were measured in 29 subjects using systemic beta-(beta) blockers and in 28 subjects who were not taking any systemic medi...
journal_title:Journal of periodontology
pub_type: 临床试验,杂志文章
doi:10.1902/jop.1996.67.4.428
更新日期:1996-04-01 00:00:00
abstract::Periodontal data typically have a hierarchical structure, with sites grouped within individuals, and individuals grouped within communities. Also, the occasion may be regarded as another level since the acquired knowledge indicates that periodontal disease activity may vary over time. Conventional statistical tests ar...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1992.63.8.690
更新日期:1992-08-01 00:00:00
abstract:BACKGROUND:Some studies have advocated marrow penetration in guided bone augmentation (GBA), whereas others have shown that bone can be generated without marrow penetration. This study examined the effect of marrow penetration and the optimal rate of penetration. METHODS:In 10 rabbits, the calvarium was exposed, and c...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2007.070086
更新日期:2007-10-01 00:00:00
abstract:BACKGROUND:This case report describes a 22-year-old female who was referred with a radiolucent lesion between her mandibular right molars. The original radiographic image suggested an odontogenic cyst. METHODS:The surgical enucleation and osteotomy of the residual cavity were performed with a piezoelectric knife. Hist...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2007.060417
更新日期:2007-07-01 00:00:00
abstract::The purpose of this investigation was to evaluate calcium hydroxide and potassium nitrate individually as densensitizing agents for hypersensitive root surfaces. The apparatus used in the experiment to measure hypersensitivity was (a) a thermo-electric stimulating device to measure hot and cold stimulation quantitativ...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1977.48.10.667
更新日期:1977-10-01 00:00:00