Abstract：
:This study describes the formation of a calcium polyacrylate-hydroxyapatite cement. Our hypothesis was that calcium phosphates would rapidly hydrolyze in the presence of polyacrylic acid (PAA) to form a cement. PAA, tetracalcium phosphate (TetCP), and dicalcium phosphate (DCP) were reacted together and formed calcium polyacrylate (CPA) and hydroxyapatite(HAp) within 10 h at 38 degrees C, resulting in hardened masses. Reaction times increased with decreasing (HApreactants)/PAA ratios. In the first of three reaction stages, the pH increased while CPA and dicalcium phosphate dihydrate (DCPD) formed. Two steady-state pH conditions occurred during the second stage as TetCP reacted with DCPD and DCP. The first steady-state pH was the result of DCPD and TetCP reacting at near-equilibrium conditions. The second steady-state pH resulted as the reaction became limited by DCP dissolution. The third, diffusionally controlled, stage occurred as DCP and previously formed HA preacted to produce calcium-deficient HAp (Ca/P = 1.5). The emphasis of this investigation was to establish the mechanistic path involved and the rate-limiting steps of the reaction.
journal_name
J Dent Resjournal_title
Journal of dental researchauthors
TenHuisen KS,Brown PWdoi
10.1177/00220345940730030501subject
Has Abstractpub_date
1994-03-01 00:00:00pages
598-606issue
3eissn
0022-0345issn
1544-0591journal_volume
73pub_type
杂志文章abstract：:The term "artificial intelligence" (AI) refers to the idea of machines being capable of performing human tasks. A subdomain of AI is machine learning (ML), which "learns" intrinsic statistical patterns in data to eventually cast predictions on unseen data. Deep learning is a ML technique using multi-layer mathematical...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034520915714
更新日期：2020-07-01 00:00:00
abstract：:Attempts to produce resin composite with antibacterial properties by incorporation of an antibacterial agent such as chlorhexidine have been reported, but problems can arise due to release of the inhibitory agent from the composite. Such problems may include toxic effects, influence on mechanical properties, and loss ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345940730080701
更新日期：1994-08-01 00:00:00
abstract：:The diagnosis of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) infection relies on the detection of viral RNA by real-time reverse transcription polymerase chain reaction (rRT-PCR) performed with respiratory specimens, especially nasopharyngeal swabs. However, this procedure requires specialized medical...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034520969670
更新日期：2021-02-01 00:00:00
abstract：:Previous reports have linked the prevalence of tooth abnormalities with high caries experience in the different types of epidermolysis bullosa (EB). However, it is not known to what extent the apparent susceptibility to enamel caries is due to disease-related altered enamel chemistry in these cases. The aim of this st...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345960750090901
更新日期：1996-09-01 00:00:00
abstract：:Molecular studies indicate that epigenetic events are important in determining how the internal enamel epithelium folds during odontogenesis. Since this process of folding leads to the subsequent arrangement of cusps on molar teeth, we hypothesized that intercuspal distances of human molar teeth would display greater ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910308200505
更新日期：2003-05-01 00:00:00
abstract：:An adhesive opaque resin for veneering on cast metal was developed with 4-methacryloxyethyl trimellitate anhydride and poly (methyl methacrylate)-coated titanium dioxide prepared by aqueous phase polymerization. The opaque resin was a modified 4-META/MMA-TBB resin. The powder consisted of 20% of the encapsulated mater...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345880670010501
更新日期：1988-01-01 00:00:00
abstract：:An acidified gel system was used to produce artificial caries lesions in root surfaces. Radiopaque surface layers were found with 47% of the lesions. Demineralized bodies of the lesion and mineralized zones of banding were seen in all lesions when examined by microradiography. Cementum and dentin seemed to respond to ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345850640050401
更新日期：1985-05-01 00:00:00
abstract：:Selected strains of oral bacteria were analyzed for their ability to degrade wheat starch, maltose, maltotriose, and maltoheptaose. S. sanguis IUOM-11M and JC804, S. mutans 6715, S. salivarius IUOM-8, A. viscosus IUOM-62, and A. naeslundii ATCC 12104 degraded all four substrates. S. mutans NCTC 10449 degraded starch, ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345880670011501
更新日期：1988-01-01 00:00:00
abstract：:Patients with restorations cemented with a reinforced zinc oxide-eugenol cement and a zinc phosphate cement were recalled after a four- to seven-year interval. No significant differences in clinical success were observed between restoration luted with the two cements. No significant difference in the incidence of cari...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345760550022201
更新日期：1976-03-01 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：:Periodontitis is characterized by periodontal tissue destruction. Since interleukin-17 (IL-17) has been reported to up-regulate IL-1beta and tumor necrosis factor-alpha (TNF-alpha), it was hypothesized that it is increased in periodontitis and up-regulates these cytokines and tissue-destructive matrix metalloproteinas...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910708600409
更新日期：2007-04-01 00:00:00
abstract：:Candida colonization of the oral cavity increases in the elderly. A major predisposing condition is denture use, which also increases in the elderly. To test whether the increase in colonization is age-related in a fashion independent of denture use, we analyzed the frequency (incidence) of carriage, the intensity of ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345990780040601
更新日期：1999-04-01 00:00:00
abstract：:There is a large variability between and among individuals in the physiology of mastication, but it is not known whether this produces a similar variability in the particle sizes of food boluses at the end of the chewing process. Food boluses obtained just before swallowing were analyzed in ten subjects (aged 36.7 +/-...
journal_title：Journal of dental research
pub_type： 临床试验,杂志文章
doi：10.1177/154405910408300713
更新日期：2004-07-01 00:00:00
abstract：:Streptococcus mutans strain JH1005 is a mutant that produces levels of bacteriocin activity three-fold-elevated than those produced by its parent, JH1001. A single infection regimen with JH1005 was found to result in persistent colonization of the teeth of all three adult subjects tested. This is a significant improve...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345870660060101
更新日期：1987-06-01 00:00:00
abstract：:The ability of physiological amounts of lysozyme to de-chain two serotype c strains of Streptococcus mutans was determined. Both human and hen lysozymes were equally effective in chain breakage of S. mutans DPR and S. mutans DJR. De-chaining did not affect growth of cultures, but resulted in finely dispersed suspensio...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345850640010901
更新日期：1985-01-01 00:00:00
abstract：:Caries of the permanent first molars of 5-year-old children was found to be associated with caries of their diciduous teeth. The sample consisted of 220 children whose permanent first molars had erupted. They were selected out of 965 children who were a representative sample of children attending compulsory kindergart...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345760550062001
更新日期：1976-11-01 00:00:00
abstract：:In comparison with control rats. chronic administration of isoproterenol (IPR) caused enlargement of the parotid and submandibular glands and the synthesis of apparently new proteins, probably by acinar cells. The parotid and submandibular saliva secreted in response to methoxamine or IPR differed markedly in protein ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345800590062001
更新日期：1980-06-01 00:00:00
abstract：:With clinical oral examinations not always possible in health surveys, researchers may instead be invited to add questions to a wider health survey. In such situations, an item is needed which adequately represents both clinical and self-reported oral health. This study investigated the clinical validity of Locker's g...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034512460676
更新日期：2012-11-01 00:00:00
abstract：:The relationship between periodontitis and systemic bone mineral density in Japanese women is undetermined. We tested the hypothesis that periodontitis was more frequent in women with low metacarpal bone mineral density (m-BMD). Subjects were 190 Japanese women (89 premenopausal, 101 post-menopausal). Periodontal stat...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345010800090901
更新日期：2001-09-01 00:00:00
abstract：:The aim of this study was to compare the effectiveness of dexamethasone administration following arthrocentesis of the temporomandibular joint (TMJ) with a placebo (saline). Twenty-eight participants with TMJ arthralgia were randomly assigned to two groups of a parallel double-blind RCT. In both groups, an arthrocente...
journal_title：Journal of dental research
pub_type： 杂志文章,随机对照试验
doi：10.1177/0022034511431260
更新日期：2012-02-01 00:00:00
abstract：:Debonding rates of 164 resin-bonded prostheses (RBP) placed from 1974 to 1985 were examined at recall. The yearly debond rates were calculated, the cumulative probability of failure was determined for the debonded RBPs, and Weibull distribution parameters were determined. For perforated prostheses, there was a high in...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345930720081401
更新日期：1993-08-01 00:00:00
abstract：:Direct FA staining for S mutans serotypes may be performed on smears made from plaque or strain isolates and on colonies attached to agar plates of black membrane filters. Staining with single conjugates directed to S mutans serotypes (a to e) as well as with polyvalent a-, b-, d-, f-fluorescein label and c-, e-rhodam...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/002203457605500126011
更新日期：1976-01-01 00:00:00
abstract：:A water-soluble lipopolysaccharide from Salmonella enteritidis and a phenol-soluble lipopolysaccharide from Leptotrichia buccalis were applied topically to the healthy marginal gingivae of beagle dogs. Saline was applied to contralateral areas as an internal control. Increases in vascular permeability were monitored b...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345860650020301
更新日期：1986-02-01 00:00:00
abstract：:The lack of a reliable bond test has hindered the elucidation of the mechanism for porcelain-metal bonding in dental systems, because a test capable of detecting differences among porcelain-metal bonds of various qualities is required before the reasons for these differences may be ascertained. A method was developed ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345880670020801
更新日期：1988-02-01 00:00:00
abstract：:The tissue-implant interfaces of functional and non-functional endosseous dental implants were compared histologically for up to one year post-operatively. Nonmineralized connective tissue zones (a "fibrous capsule") existed in all functional interfaces. Direct, or nearly direct, bone apposition to implants occurred i...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345790580100201
更新日期：1979-10-01 00:00:00
abstract：:A quantitative microprobe analysis was conducted on three commercial amalgams to determine the nature of the phases present. The presence of tin in the Ag-Hg phase (gamma1) was confirmed and Cu-3Sn was found in the original alloy particles. In the dispersant amalgam studied, little Sn-Hg phase (gamma-2) was found and ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：
更新日期：1975-03-01 00:00:00
abstract：:A new type of hydraulic cement has been developed. This cement consists of a mixture of cement powder and setting agent powder and therefore has only to be kneaded with a little amount of water when being used. ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345790580050601
更新日期：1979-05-01 00:00:00
abstract：:In sham-operated and TPTX animals, F treatment did not affect final body weight, or serum Ca and P. In sham-treated rats, serum iPTH was not affected by F treatment. At the periosteum, F increased bone formation rate and bone and matrix apposition rates. At the endosteum, F treatment decreased forming surface, bone fo...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345770560031601
更新日期：1977-03-01 00:00:00
abstract：:Minimally invasive caries-removal procedures remove only caries-infected dentin and preserve caries-affected dentin that becomes remineralized. Dental cements containing calcium phosphate promote remineralization. This study evaluated the in vivo remineralization capacity of resin-based calcium-phosphate cement (Ca-P)...
journal_title：Journal of dental research
pub_type： 杂志文章,随机对照试验
doi：10.1177/0022034509360155
更新日期：2010-03-01 00:00:00
abstract：:Lipopolysaccharide (LPS) from the Gram-negative pathogen Porphyromonas gingivalis (Pg) stimulates cytokine secretion in immune cells, and thereby initiates the inflammation associated with periodontitis. Modulation of pro-inflammatory cytokine activity is a plausible therapeutic target in periodontal disease. Vasoacti...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910508401106
更新日期：2005-11-01 00:00:00
