Abstract：
:Rotational freedom of the implant-abutment connection influences its screw joint stability; for optimization, influential factors need to be evaluated based on a previously developed closed formula. The underlying hypothesis is that the manufacturing tolerances, geometric pattern, and dimensions of the index do not influence positional stability. We used the dimensions of 5 commonly used implant systems with a clearance of 20 microm to calculate the extent of rotational freedom; a 3D simulation (SolidWorks) validated the analytical findings. Polygonal positional indices showed the highest degrees of rotational freedom. The polygonal profile displayed higher positional stability than the polygons, but less positional accuracy than the cam-groove connection. Features of a maximal rotation-safe positional index were determined. The analytical calculation of rotational freedom of implant positional indices is possible. Rotational freedom is dependent on the geometric design of the index and may be decreased by incorporating specific aspects into the positional index design.
journal_name
J Dent Resjournal_title
Journal of dental researchauthors
Semper W,Kraft S,Krüger T,Nelson Kdoi
10.1177/0022034509341243subject
Has Abstractpub_date
2009-08-01 00:00:00pages
731-5issue
8eissn
0022-0345issn
1544-0591pii
0022034509341243journal_volume
88pub_type
杂志文章abstract：:The biochemical function, adenylate energy charge (AEC), correlates with the viable count of S. mutans. AEC may be used to estimate the percent viable fraction of bacteria in dental plaque samples. An interactive computer program designed to process the AEC data is described. ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/002203457905800410011
更新日期：1979-11-01 00:00:00
abstract：:Zirconia-based restorations often fracture from chipping and/or delamination of the porcelain veneers. We hypothesized that veneer chipping/delamination is a result of the propagation of near-contact-induced partial cone cracks on the occlusal surface under mastication. Masticatory loading involves the opposing tooth ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910808701210
更新日期：2008-12-01 00:00:00
abstract：:Although little is known about the mechanism of action of eugenol, some related compounds have been compared with capsaicin derivatives in terms of the relationship between their chemical structure and activity. To elucidate whether eugenol and capsaicin act via a common mechanism at the neuronal membrane, we investig...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345970760110401
更新日期：1997-11-01 00:00:00
abstract：:Severe early childhood caries (S-ECC) is a multifactorial disease that can lead to suffering and reduced oral health-related quality of life in young children. The bacterial and fungal composition of dental plaque and how children's sex is associated with S-ECC are largely unknown. In this study, V4-16S rRNA and ITS1 ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034520908595
更新日期：2020-06-01 00:00:00
abstract：:The effects of oral rinses on enamel fluoride uptake, caries, and plaque pH in rats were investigated by use of (1) an acidic calcium phosphate solution (CPS) saturated with dicalcium phosphate dihydrate (DCPD) and (2) a 1% fluoride solution. Osborne-Mendel rats, 19 days of age, were randomly assigned to one of four m...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345880670061401
更新日期：1988-06-01 00:00:00
abstract：:We previously demonstrated that an anti-caries DNA vaccine intranasally administered with recombinant flagellin protein as a mucosal adjuvant enhanced salivary IgA response and conferred better protection against caries. However, the relatively weak immunogenicity of DNA vaccines and the necessity for a large quantity...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034512457684
更新日期：2012-10-01 00:00:00
abstract：:Resolvins are potent anti-inflammatory mediators derived from ω-3 fatty acids. Results from our previous studies indicated that resolvin D1 (RvD1) blocks pro-inflammatory responses in salivary glands. Furthermore, RvD1 enhances salivary epithelial integrity, demonstrating its potential use for the restoration of saliv...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034513519108
更新日期：2014-03-01 00:00:00
abstract：:As an approach for improving the outcome and predictability of periodontal regenerative therapies, we have focused on determining the responses of cells within the local environment to putative regenerative factors. This study examined the effects of bone morphogenetic protein-2 (BMP-2) on murine cementoblasts in vitr...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910308200106
更新日期：2003-01-01 00:00:00
abstract：:The purpose of this study was to evaluate the Bruxcore Plate (BP) as a dependent measure of nocturnal bruxing activity. As part of a bruxism treatment study, we evaluated 100 nocturnal bruxers for bruxing activity before, during, and immediately after treatment and again at a six-month recall. The first 40 subjects wo...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345890680061101
更新日期：1989-06-01 00:00:00
abstract：:Overgrowth of oral yeast is a common problem among the elderly. Probiotic bacteria are known to inhibit the growth of pathogenic microbes. We tested the hypothesis that cheese containing probiotic bacteria can reduce the prevalence of oral Candida. During this 16-week, randomized, double-blind, placebo-controlled stud...
journal_title：Journal of dental research
pub_type： 杂志文章,随机对照试验
doi：10.1177/154405910708600204
更新日期：2007-02-01 00:00:00
abstract：:4-META and new phosphate-methacrylate resins adhere strongly to dental alloys. However, for strengthening the water durability of the adhesive interface, the oxidation of the alloy surface is indispensable. A new oxidation method using ion-sputtering was developed, and the effectiveness of this surface treatment on tw...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345880670110301
更新日期：1988-11-01 00:00:00
abstract：:We evaluated the histopathological response of the periodontal membrane to intentionally-replanted teeth carrying composite (experimental) and silver amalgam (control) restorations in the middle third of each root. The study revealed that the amalgam produced, in the periodontal tissues, an initial localized inflammat...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345830620011801
更新日期：1983-01-01 00:00:00
abstract：:Khat-chewing has been associated with oral lesions including oral cancer, but the mechanisms leading to their development are not known. We hypothesized that khat interferes with the physiological processes of the oral mucosa, such as cell proliferation and differentiation, and aimed at investigating the effects of kh...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034509354980
更新日期：2010-03-01 00:00:00
abstract：:In this study, environmental stains were removed from maxillofacial elastomers by solvent extraction. Silastic 44210, an RTV silicone with proven color and physical property stability, was stained with lipstick, disclosing solution, and methylene blue. These stains were then removed by solvent extraction with each of ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345810600100501
更新日期：1981-10-01 00:00:00
abstract：:The present study was conducted to investigate the role of proteolysis by matrix metalloproteinase 20 (MMP20) in regulating the initial formation of the enamel mineral structure during the secretory stage of amelogenesis, utilizing Mmp20-null mice that lack this essential protease. Ultrathin sagittal sections of maxil...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034518823537
更新日期：2019-04-01 00:00:00
abstract：:Genetic approaches are rapidly yielding new information about our sense of taste. This information comes from both molecular studies of genes encoding taste receptors and other taste-signaling components, and from studies of inherited variation in taste abilities. Our understanding of bitter taste has advanced by comb...
journal_title：Journal of dental research
pub_type： 杂志文章,评审
doi：10.1177/154405910408300603
更新日期：2004-06-01 00:00:00
abstract：:The treatment of periodontitis/peri-implantitis involves the reduction/eradication of periopathogens. After therapy, beneficial and pathogenic species recolonize the subgingival area. The dynamics of recolonization and especially the role of the supragingival environment in this process are still not well-understood. ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910508400409
更新日期：2005-04-01 00:00:00
abstract：:The classic stimulus for cellular cytokine production is bacterial lipopolysaccharide (endotoxin). It was therefore hypothesized that tumor necrosis factor-alpha (TNF-alpha) may be responsible for pericoronitis. TNF-alpha and its receptors were detected by immunohistochemical staining in third molar pericoronitis in t...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910508401216
更新日期：2005-12-01 00:00:00
abstract：:The kinetics of subsurface demineralization of tooth sections has been studied in real-time by scanning microradiography (SMR). Demineralization was carried out: (1) with a large volume of solution buffered to pH = 4 to maintain a constant composition; and (2) in a small constant volume (approximately 3 mL), buffered ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345930720051401
更新日期：1993-05-01 00:00:00
abstract：UNLABELLED:Dental caries affects most adults worldwide; however, the risk factors for dental caries do not necessarily exert their effects uniformly across all tooth surfaces. Instead, the actions of some risk factors may be limited to a subset of teeth/surfaces. Therefore, we used hierarchical clustering on tooth surf...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034512463241
更新日期：2013-01-01 00:00:00
abstract：:The sequelae of sustained, in vivo delivery of two important neurotransmitter substances, glutamate and thyrotropin-releasing hormone (TRH), upon craniofacial growth and development have previously not been investigated. Our purpose was to document and compare the relative effects of glutamate and TRH microspheres ste...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345970760080601
更新日期：1997-08-01 00:00:00
abstract：:The pathomechanics of degenerative joint disease of the temporomandibular joint (TMJ) may involve fatigue produced by mechanical work on the articulating tissues. This study tested the hypotheses that mechanical work in the TMJ (i) varies with the type of mandibular activity, and (ii) is evenly distributed over TMJ su...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910608501106
更新日期：2006-11-01 00:00:00
abstract：:Secondary palatogenesis occurs when the bilateral palatal shelves (PS), arising from maxillary prominences, fuse at the midline, forming the hard and soft palate. This embryonic phenomenon involves a complex array of morphogenetic events that require coordinated proliferation, apoptosis, migration, and adhesion in the...
journal_title：Journal of dental research
pub_type： 杂志文章,评审
doi：10.1177/0022034517726284
更新日期：2017-10-01 00:00:00
abstract：:Thermal diffusivity, a property related to the thermal insulative efficiency of a material, was measured in nine glass-ionomer cements and compared with results from a silicate and a polycarboxylate cement. Each cement was mixed at various powder-liquid ratios (P/L) and moulded into a rectangular prism of approximate ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345870660051001
更新日期：1987-05-01 00:00:00
abstract：:Although certain bacterial species appear to be risk factors for pain due to odontogenic infections, comparatively little is known about the potential mechanisms mediating this effect. In this study, we tested the hypothesis that trigeminal nociceptive neurons express the TLR4 or CD14 receptors, thus enabling sensory ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910608500108
更新日期：2006-01-01 00:00:00
abstract：:Blood cortisol levels of oral surgery patients were analyzed to objectively determine the effect of intravenous sedation on surgical stress. Results showed a measure of sedation but did not adequately reflect the stress of oral surgery or the changes produced by intravenous sedation. ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345750540053501
更新日期：1975-09-01 00:00:00
abstract：:Dentinal pain in connection with mechanical stimulation i.e. probing, chiseling and initial drilling may be due to removal of fluid from the dentinal tubules. Loss of fluid due to "normal" evaporation from exposed dentin may produce an outward flow in the dentinal tubules rapid enough to cause pain and within a few mi...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345780570012001
更新日期：1978-01-01 00:00:00
abstract：:Dissolution of mercury from the Ag-Hg matrix phase of dental amalgam is distilled water and synthetic saliva, and the mercury evaporation from the solutions, were studied in vitro. The main objectives of the study were to evaluate the factors that affect the results of the mercury release tests, and to consider the po...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345900690050901
更新日期：1990-05-01 00:00:00
abstract：:Vietnamese immigrant and Norwegian children, matched according to caries experience, age, and sex, were compared with respect to S. mutans in dental plaque and in saliva. Regardless of ethnic group, S. mutans prevalence was highest in plaque over caries lesions and from fissures, and lowest in plaque from smooth surfa...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345840630120801
更新日期：1984-12-01 00:00:00
abstract：:The ability of human oral bacteria to inhibit Streptococcus mutans was studied under a variety of in vitro conditions using an agar overlay assay. Extensive inherent variability in microbial antagonism by certain organisms was demonstrated. Antagonistic activity was also significantly influenced by changes in the assa...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345800590110501
更新日期：1980-11-01 00:00:00
