Abstract：
:Dentin bridging of 150 mechanically exposed monkey pulps to two adhesive resins [BondWell LC (BW); Clearfil Liner Bond II (LB)] and a calcium hydroxide cement [Dycal (DY)] were histopathologically evaluated at 3, 7, 14, 30, and 60 days after operation (n = 10). The dentin bridge structure was three-dimensionally reconstructed from serial sections using a computer-aided reconstruction system. At three and seven days, in all pulps, no necrotic tissue and slight inflammatory cell infiltration was observed just below the exposure site. At 14 days, spindle-shaped fibroblast cells could be detected at the wound surface. All dentin chips showed reparative dentin deposition along the periphery of the wound surface. From this stage, the formation of secondary dentin from the pulpal wall at the periphery of the exposed area was recognized in all pulps. At 30 days, initial signs of dentin bridging were observed at the wound surface with a well-organized layer of odontoblastoid cells. The exposed area became occluded with a dentin bridge as the observation period increased. Group DY showed significantly higher incidence of dentin bridging than other groups at 30 days (p < 0.05). However, no significant difference of dentin bridge formation was found between Group DY and Groups BW and LB at 60 days. Bacterial penetration along the cavity walls and pulp tissue could not be detected in all groups. Histopathological observations and three-dimensional image analysis suggested that dentin bridge formation may occur following three patterns: (1) formed from the periphery of the residual dentin chip at the wound surface within 14 days, (2) formed within 14 days from the periphery of the cavity floor and with formation of reparative dentin by stimulation during the cavity preparation, and (3) formed from the wound surface within 30 days after exposure.
journal_name
Oper Dentjournal_title
Operative dentistryauthors
Kitasako Y,Shibata S,Pereira PN,Tagami Jkeywords:
subject
Has Abstractpub_date
2000-05-01 00:00:00pages
155-62issue
3eissn
0361-7734issn
1559-2863journal_volume
25pub_type
杂志文章abstract：:This study evaluated the two-year clinical performance of two minimally invasive cavity preparation techniques, bur and laser, in Class I occlusal resin composite restorations. Twenty-seven patients, each having at least one pair of occlusal caries, were enrolled in this study. For each patient, one of the cavities wa...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/09-339-C
更新日期：2010-09-01 00:00:00
abstract：OBJECTIVES:Whitening efficacy has been related to hydrogen peroxide (HP) diffusion into tooth structure. However, little information is available relating rheological properties to whitening efficacy. The purpose was to evaluate the whitening efficacy and HP penetration level of a 10% HP gel at three different viscosit...
journal_title：Operative dentistry
pub_type： 杂志文章,随机对照试验
doi：10.2341/17-099-L
更新日期：2018-05-01 00:00:00
abstract：:Amalgam has been used in the restoration of structurally compromised posterior teeth for many years. When placing large amalgam restorations, replacement of weak cusps with restorative material is recommended to prevent tooth fracture. This recommendation can be modified with new guidelines using modern adhesive techn...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/11-082-T
更新日期：2012-07-01 00:00:00
abstract：:For many years, operative dentistry has been using regenerative approaches to treat dental disease. The use of calcium hydroxide to stimulate reparative or reactionary dentin is clearly an example of such a therapeutic strategy. The advent of tissue engineering is allowing dentistry to move forward in the use of regen...
journal_title：Operative dentistry
pub_type： 杂志文章,评审
doi：10.2341/06-000
更新日期：2006-11-01 00:00:00
abstract：:This investigation evaluated the stabilizing effect of glass fiber reinforced posts (FRP) luted with self-adhesive universal cement on the fracture resistance of excessively flared endodontically treated teeth (ETT). Values were compared to teeth with no ferrule, 2 mm ferrule and resin cement for luting with 2 mm ferr...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/05-142
更新日期：2006-11-01 00:00:00
abstract：:Bleaching-induced tooth sensitivity (TS) is highly prevalent. OBJECTIVE:This study aimed to determine if the combination of opioids and nonopioids analgesics (Tylex) may provide a better analgesic effect. METHOD:A triple-blind, parallel, randomized two-center clinical trial was conducted with 105 healthy patients wh...
journal_title：Operative dentistry
pub_type： 杂志文章,多中心研究,随机对照试验
doi：10.2341/17-092-C
更新日期：2018-03-01 00:00:00
abstract：:Hard tissue modification by means of laser irradiation is becoming popular in dentistry, since it promotes assorted responses between the tooth and the restorative material. Some studies on the bond strength of adhesive systems to Nd:YAG irradiated teeth have shown distinctive behaviors when irradiation was applied be...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/05-110
更新日期：2006-09-01 00:00:00
abstract：:This in vitro study investigated the possible dehydration of dentin caused by bleaching agents. Furthermore, it tested whether protective dentin varnishes can maintain the physiological moisture of dentin during bleaching treatment. Fifty-five standardized dentin cylinders were prepared from freshly extracted bovine i...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/05-89
更新日期：2006-09-01 00:00:00
abstract：STATEMENT OF THE PROBLEM:Precise shade matching can be one of the most difficult tasks for the dentist and some variables may influence the process of shade comparison. PURPOSE OF THE STUDY:This study tested the differences in shade perception between genders, the influence of the observer's clinical experience, and t...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/10-057-C
更新日期：2012-05-01 00:00:00
abstract：:This in vitro study investigated the correlation between factors related to cavosurface marginal adaptation and microleakage in Class II cavities restored with a light- or chemical-activated resin composite. Standardized cavities were prepared in 40 molars that were randomly divided between both materials. Each of the...
journal_title：Operative dentistry
pub_type： 杂志文章,随机对照试验
doi：10.2341/06-16
更新日期：2007-01-01 00:00:00
abstract：:The aim of this investigation was to verify the influence of 3 light curing units on the degree of conversion, using different irradiation conditions: 1) manufacturers' recommended times of photo-activation, 2) standardizing total energy density among the units and 3) standardizing energy density at the 450-490 nm wav...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/05-81
更新日期：2006-07-01 00:00:00
abstract：OBJECTIVE:The aim of this study was to investigate the clinical performance and to validate the Lesion Activity Assessment (LAA) in conjunction with the International Caries Detection and Assessment System (ICDAS) for occlusal caries diagnosis in permanent teeth. METHODS:Patients with erupted or partially erupted thir...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/13-332-C
更新日期：2015-09-01 00:00:00
abstract：:The present study investigated the effect of three high-viscosity bulk-fill resin-based composite materials on cuspal deflection in natural teeth. Thirty-two sound maxillary premolar teeth with large slot mesio-occlusal-distal cavities were distributed into four groups (n=8). Three groups were restored with bulk-fill ...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/16-072-L
更新日期：2018-01-01 00:00:00
abstract：:The critical point of the clinical procedure of direct splinting is the placement of the fiber-reinforced strip, which has to be well adapted to tooth surfaces. This article describes the use of aluminum foil to cover and protect the fiber-reinforced strip from light polymerization during the direct splinting techniqu...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/05-68
更新日期：2006-05-01 00:00:00
abstract：:This study compared the clinical performance of a nanofilled resin composite for posterior restorations with 2 microhybrid and 1 packable composite after 12 months of clinical service. Forty-two patients with at least 5 Class I or II restorations under occlusion were enrolled in this study. A total of 148 restorations...
journal_title：Operative dentistry
pub_type： 杂志文章,随机对照试验
doi：10.2341/05-103
更新日期：2006-07-01 00:00:00
abstract：:This study investigated the effect of three equivalent radiant exposure energy application sequences (EASs): high intensity power (HIP: 1,177 mW/cm2, 40 seconds), low intensity power (LOP: 573 mW/cm2, 71 seconds) and ramp (RMP: 650 mW/cm2, 5 seconds, then the irradiance increases to 1047 mW/cm2, 37 seconds) on the mic...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/06-30
更新日期：2007-03-01 00:00:00
abstract：PURPOSE:To investigate the influence of ferrule thickness on fracture resistance after mechanical cycling of teeth restored with different intracanal posts. METHODS AND MATERIALS:One hundred twenty bovine incisor teeth were randomized into six study groups, based on the intracanal post used (fiber post or cast post an...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/18-241-L
更新日期：2019-11-01 00:00:00
abstract：OBJECTIVES::To evaluate the effect of a remineralizing gel combining fluoride and calcium silicate/phosphate or a sodium fluoride gel on bleached enamel microhardness, color, and wear susceptibility. METHODS AND MATERIALS::Two hundred forty bovine enamel-dentin samples were prepared. Baseline analysis of Knoop microha...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/17-150-L
更新日期：2019-01-01 00:00:00
abstract：OBJECTIVES:To evaluate the effect of endodontic access on the failure load resistance of both adhesively and conventionally luted, full-contour monolithic yttria-stabilized zirconium dioxide (Y-TZP) and adhesively luted lithium disilicate (LD) crowns cemented on prepared teeth. METHODS AND MATERIALS:Seventy-two human ...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/18-231-L
更新日期：2020-05-01 00:00:00
abstract：OBJECTIVE:To evaluate the effect of mechanical loading on the microtensile bond strength (MTBS) of five adhesive systems to dentin. METHODS:Flat dentin surfaces from human molars were divided into five groups and bonded with total-etch self-priming adhesives (Single Bond, Prime&Bond NT and Prime&Bond XP), two-step sel...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/04-161
更新日期：2006-01-01 00:00:00
abstract：:Good wettability is one of the desirable physical properties of mercury-free gallium-based alloys (Gallium Alloy GF). However, wettability, while providing good adhesion to the cavity wall, has the adverse effect of causing stickiness to the inside of the capsule during mixing, and also to the metal hand instruments u...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：1996-01-01 00:00:00
abstract：:The objective of this paper is to review the literature concerning factors affecting adhesion to mineralized tissues. Factors related to the physicochemical structure of the adherents and to the inherent properties of composite restorative materials, along with the postulated bonding mechanisms of current adhesive sys...
journal_title：Operative dentistry
pub_type： 杂志文章,评审
doi：
更新日期：1992-01-01 00:00:00
abstract：OBJECTIVE:This study evaluated the importance of enamel at the cervical margin for support and retention of a class II composite restoration in relation to fracture strength, fracture mode, and leakage. METHODS:Sixty-five newly extracted teeth were randomly divided into five groups. Within each group, standardized cla...
journal_title：Operative dentistry
pub_type： 杂志文章,随机对照试验
doi：10.2341/10-126-L
更新日期：2011-03-01 00:00:00
abstract：CLINICAL RELEVANCE:Computer-aided design/computer-aided manufacturing (CAD/CAM) composite resins are susceptible to degradation by dietary solvents. Dietary counselling is prudent when placing such CAD/CAM restorations. SUMMARY:This study determined the effect of dietary solvents on the surface roughness (Ra) of direc...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/19-070-L
更新日期：2020-07-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to evaluate the strengthening effect of resin composite, cured by a modified layering protocol, for teeth with simulated coronal fracture and weakened immature roots. METHODS:Fifty maxillary teeth were decoronated and their apices sectioned to standardize the length to 12 mm. Pr...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/12-525L
更新日期：2014-05-01 00:00:00
abstract：:This study compared the clinical performance of a polyacid-modified resin composite and a resin-modified glass-ionomer restorative material over two years. Thirty-four pairs of restorations of Compoglass and Fuji II LC were placed in caries-free cervical erosion/abfraction lesions without tooth preparation. Restoratio...
journal_title：Operative dentistry
pub_type： 临床试验,杂志文章,随机对照试验
doi：
更新日期：2001-01-01 00:00:00
abstract：:This study evaluated the effects of two in-office bleaching agents (Beyond and Opalescence Boost) with different pH on the structure and mechanical properties of human enamel in vitro and in situ. One hundred and eight enamel slabs were obtained from freshly extracted premolars. The specimens were randomly distributed...
journal_title：Operative dentistry
pub_type： 杂志文章,随机对照试验
doi：10.2341/11-173-L
更新日期：2013-01-01 00:00:00
abstract：:This study evaluated the shear-bond strength of 11 luting cements from different material classes to manufactured pre-treated zirconia ceramics (Lava: 97% ZrO2, stabilized with 3% Y2O3). In addition, the influence of the curing method on shear-bond strength was investigated. The cements examined were one zinc-phosphat...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：2005-05-01 00:00:00
abstract：:No data are available on the direct acute vascular effect of dental bonding materials on the dental pulp. This study investigated the effects of the components of a composite resin-bonding system on pulpal vascular diameter. Three groups of 10 male Sprague-Dawley rats (weighing 330 +/- 51 g) were used for this investi...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：
更新日期：2000-09-01 00:00:00
abstract：OBJECTIVES:To evaluate the bond strength of adhesive luting agents applied to caries-affected dentin (CAD). METHODS:Thirty-six noncarious human third molars were abraded to expose an occlusal dentin surface. Caries lesions were induced in half of the samples using a microcosm biofilm model. Biofilm was cultivated unde...
journal_title：Operative dentistry
pub_type： 杂志文章
doi：10.2341/14-169-L
更新日期：2015-05-01 00:00:00
