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At least 433 records · Page 24Linked to original sources
PubMed2006

Effect of bonding systems on post-operative sensitivity from posterior composites.

PURPOSE: To compare post-operative sensitivity from posterior composites lined with bonding systems that utilize either a self-etching primer or phosphoric acid conditioner. METHODS: Occlusal cavities on homologous contralateral posterior teeth in 28 selected subjects were lined with either One-Step Plus (a bonding system that utilizes phosphoric acid conditioner) or Clearfil SE Bond with a self-etching primer, and then restored with a hybrid resin composite. Post-operative sensitivity was assessed subjectively by asking the patient to classify pain from the restored tooth into none, mild or severe; and objectively by measuring the time it took for the patient to feel cold sensation when standardized ice stick was placed against the mid-buccal surface of the tooth. RESULTS: Subjective assessment showed that post-operative sensitivity was mild with either of the bonding systems; and marginal homogeneity test showed no statistically significant difference in the prevalence of post-operative sensitivity (P> 0.05), although there was a trend towards decreasing sensitivity with Clearfil SE Bond as post-operative period increased (P= 0.027). In the objective assessment, repeated measures of ANOVA showed that cold response measurements increased significantly with postoperative period only in the teeth lined with Clearfil SE Bond (P< 0.05), indicating decreasing post-operative sensitivity. However, paired t-test showed no significant difference between the cold response measurements obtained for the two bonding systems (P> 0.05).

Acid Etching, Dental↗
PubMed1999

Bite-formed posterior resin composite restorations, placed with a self-etching primer and a novel matrix.

Problems encountered in placement of posterior resin composite restorations have limited their clinical application. This article identifies and solves 4 of the frequently encountered problems: establishment of tight and anatomically correct contacts, refinement of occlusion, postoperative sensitivity, and time required for the procedure. A posterior resin composite is placed using a self-etching primer. A novel matrix, flowable composite, and bite-formed occlusion facilitate the clinical procedure.

Acid Etching, Dental↗
PubMedDate not supplied

Postoperative pain following bonded amalgam restorations.

Sixty subjects were randomized into two groups. The time, in seconds, that it took subjects to respond to a standardized cold stimulus was recorded at baseline and again 1 week following treatment. During the intervening week subjects filled out three self-report questionnaires about pain from exposure to cold and several other common sources of postoperative pain. These questionnaires were filled out after 1 day, again 3 days after the first questionnaire, and 3 days after the second. Subjects mailed the questionnaires in immediately to provide three independent reports about cold sensitivity. The group receiving an OptiBond adhesive liner under their amalgam restorations was not found to be any less sensitive to cold, either by timed response to a cold stimulus or by self-report of pain, than the group receiving conventional liners and bases.

Adolescent↗
PubMedDate not supplied

Cavity sealers, liners, and bases: current philosophies and indications for use.

Traditional dental education has recommended the generous use of bases and liners under amalgam restorations, primarily to prevent postoperative sensitivity. However, new developments in bases and liners, as well as a better understanding of pulp biology, have changed the indications for the use of these materials. Understanding the properties of currently available materials and how they interact with pulpal tissues can help the practitioner decide when to use bases and liners and which products to choose.

Calcium Hydroxide↗
PubMedDate not supplied

A randomized clinical trial of agents to reduce sensitivity after crown cementation.

Three desensitizing agents were evaluated for the control of sensitivity after cementation of 77 crowns. Information was collected on pain in response to hot, cold, or bite preoperatively; and postoperatively with temporary crowns at one week and at one month after cementation of crowns. No medicament was clearly better than the placebo.

Adult↗
PubMed2000

A clinical evaluation of Class II composites placed using a decoupling technique.

PURPOSE: This study was undertaken to evaluate the three-year clinical performance of Class II restorations of a fine particle hybrid composite placed using a decoupling placement technique, whereby polymerization shrinkage stresses at the cervical tooth-restoration interface were minimized by separating the initial gingival increment of composite from the body of the restoration using a polyurethane varnish. MATERIALS AND METHODS: The study was a practice-based explanatory, single-center clinical trial. A minimum of 40 Class II restorations of the material under investigation (Tetric) was required to be placed in predominantly molar teeth in selected patients. The restorations were placed using a decoupling incremental technique, bonding being accomplished using Syntac and Heliobond. The restorations were reviewed within 1 month of placement, thereafter at 18 months, then at 2 and 3 to 4 years using predetermined codes and criteria. Impressions and photographic records were used to obtain retrospective, third-party assessments of the restorations. RESULTS: Of 43 restorations originally placed and found to have ideal characteristics at baseline review, 41 (95%) were reviewed at 18 months, 36 (84%) at two years, and 31 (74%) at 3 to 4 years. None of the restorations were found to have suffered significant deterioration, notwithstanding three restorations having been lost to the study because of the replacement of part of the restored tooth for causes other than the catastrophic failure of the material. No secondary caries or postoperative sensitivity was recorded. CONCLUSION: It was concluded that the findings support the use of the material under investigation in the restoration of moderate- to large-sized Class II preparations in selected patients. The decoupling placement technique employed may be found to be an effective means to limit postoperative sensitivity and to contribute to the favorable in-service performance of restorations of the type investigated. Good practice would now require a multicentered, randomized controlled trial to investigate the effectiveness of the material and, in particular, the decoupling technique under the conditions of everyday practice.

Acrylates↗
PubMedDate not supplied

Effect of pulp protection technique on the clinical performance of amalgam restorations: three-year results.

This study evaluated the influence of the pulp protection technique on clinical performance of amalgam restorations after three years, with particular reference to post-operative sensitivity and secondary caries. One hundred and twenty (120) Class II amalgam restorations (68 premolars, 52 molars; 78 MOD, 42 OD/MO) were placed in 30 participants (four restorations per participant). The restorations were divided into four groups according to the pulp protection technique used: copal varnish; 2% neutral sodium fluoride; adhesive resin and no pulp protection. The parameters evaluated were post-operative sensitivity, staining of the dental structure, tooth vitality, partial or total loss of the restoration and secondary caries. One hundred and eight (108) restorations were available for evaluation after three years. No partial or total loss of restorations had occurred; all teeth were vital, no tooth structure staining or secondary caries was detected in any of the restored teeth. Post-operative sensitivity was observed only in two restorations at baseline and at seven-days. The three-year clinical performance of teeth restored with a high copper dispersed phase amalgam was not affected by the choice of pulp protection technique.

Adolescent↗
PubMed1997

The effect of resin desensitizing agents on crown retention.

Many dentists use resin primers and adhesives to prevent post-cementation sensitivity of teeth restored with crowns. However, little information is available regarding the effect of these resins on crown retention. This laboratory study concluded that two popular resins, Gluma Desensitizer (Heraeus Kulzer) and One-Step (Bisco Dental Products), had little or no effect on the retention of crowns luted with zinc phosphate, glass ionomer or resin-modified glass ionomer cements.

Analysis of Variance↗
PubMed2002

Three-year performance of a calcium-, fluoride-, and hydroxyl-ions-releasing resin composite.

Secondary caries is the main reason for replacement of restorations in cross-sectional studies. To prevent demineralization, the use of ion-releasing materials has been suggested. The purpose of this study was to evaluate the durability of a new resin composite that releases calcium-, fluoride- and hydroxyl ions at low pH. Sixty-nine posterior restorations were placed in 36 patients and were evaluated at baseline, 6 months, 1, 2, and 3 years with slightly modified USPHS criteria. Postoperative sensitivity was observed in 2 teeth directly after placement and in another 8 teeth after 6-12 months. Absence of the use of an adhesive bonding technique explained the symptoms. A total of 26% failures was observed during the follow-up: 13 cusp fractures, 2 partial fractures of the resin composite, 1 secondary caries and 1 endodontic treatment due to prolonged sensitivity. The cusp fractures occurred during the second part of the follow-up and may be explained by expansion of the composite material due to water expansion and/or hydrolytic degradation of the alkaline glass filler. It can be concluded that the new ion-releasing resin composite showed, despite promising pH stabilizing properties, a clinically unacceptable failure rate.

Adult↗
PubMed1998

Class I occlusal composite resin restorations: in vivo post-operative sensitivity, wall adaptation, and microleakage.

PURPOSE: To investigate the effect of restoration technique and adhesive system on the post-operative sensitivity and marginal adaptation of Class I occlusal composite resin restorations placed in vivo. MATERIALS AND METHODS: 48 Class I cavities were restored in vivo according to one of three protocols: (1) Scotchbond Multi-Purpose/P50 placed in increments; (2) Scotchbond Multi-Purpose/P50 placed in bulk, and (3) Clearfil Liner Bond 2/Clearfil Ray Posterior placed in bulk. Post-operative sensitivity and sensitivity on loading were recorded 5-7 weeks after placement of the restorations; the teeth were cautiously extracted, immersed in a dye solution and sectioned. SEM observations were made from epoxy resin replicas. Microleakage and gap formation was assessed. RESULTS: No differences among adhesive systems or restoration procedures were found for microleakage. Post-operative sensitivity was reported in 14% of all teeth but was absent in the Clearfil Liner Bond 2 group. Sensitivity on loading was experienced by patients in 56% of the restorations. Group 1: nine teeth; Group 2: 15 teeth; Group 3: three teeth. Differences were statistically significant for all three groups. The SEM analysis showed that restorations placed in two layers showed less gaps than restorations placed in bulk.

Acid Etching, Dental↗
PubMed2001

Four-year clinical evaluation of posterior resin-based composite restorations placed using the total-etch technique.

PURPOSE: To report the 4-year clinical performance of posterior resin-based composite restorations placed using the total-etch technique. MATERIALS AND METHODS: Over a period of 1 year, 726 restorations (248 molars, 478 premolars; 260 Class I, 466 Class II; 540 replacements, 186 primary decay) were placed on conservative preparations, using the incremental placement technique in a clinical environment. Baseline data were collected, and the restorations were evaluated after 4 years. Z100 and Scotchbond Multi-Purpose (SBMP) (3M Dental Products, St. Paul, Minnesota) were used as the restorative system. The criteria evaluated were color match, marginal adaptation, anatomic form, cavosurface marginal discoloration, axial contour, interproximal contact, secondary caries, postoperative sensitivity, and tooth vitality. RESULTS: At baseline, 24% of the teeth restored presented postoperative sensitivity; 86% of the sensitive teeth were from the replacement group. At 4 years, all teeth were vital to cold test. Eighteen restorations (2.5%) presented clinically detectable marginal fracture. The shade was acceptable in all restorations. Cavosurface marginal discoloration was observed in 47 restorations (6.5% bravo scores). Axial contour, interproximal contact, and marginal adaptation received 100% alfa scores. No secondary caries was diagnosed in any of the teeth examined. None of the examined restorations required replacement. CLINICAL SIGNIFICANCE: Under controlled clinical conditions, posterior resin-based composite restorations placed with the total-etch technique and restorative Z100/SBMP have the potential to present a high success rate at 4 years. None of the examined restorations required replacement, and there was no clinically detectable wear in any of the restorations. Simultaneous etching of enamel and dentin followed by the application of a resin adhesive can be considered an adequate modality of pulp protection in nonexposed tooth preparations.

Acid Etching, Dental↗
PubMed2003

Clinical evaluation of a self-etching and a one-bottle adhesive system at two years.

OBJECTIVES: The clinical performances of a self-etching adhesive system, Clearfil SE Bond, and a one-bottle adhesive system, Prime&Bond NT, were evaluated in non-carious Class V restorations for a period of two years. METHODS: Ninety-eight restorations were made by one operator for 32 patients. The resin composite used to restore the teeth were Clearfil AP-X and Spectrum TPH for Clearfil SE Bond and Prime&Bond NT, respectively. Two clinicians at the baseline, 6th, 12th and 24th months evaluated the posterior composites according to the modified Ryge criteria's. For this, color match, marginal discoloration, marginal adaptation, recurrent caries, anatomic form, postoperative sensitivity and retention rates were considered. The changes across time and across groups were evaluated statistically. RESULTS: At two years, 88 restorations were reviewed in 28 patients. The retention rates for Clearfil SE Bond were 93 and 91% for Prime&Bond NT. The percentages of the retention rates of both adhesive systems were not found to be different when calculating the failure rates. Recurrent caries, anatomic form and postoperative sensitivity were scored as Alpha for all restorations. Two cases of both adhesive systems showed slight marginal discoloration problems. Three restorations of Prime&Bond NT and one of Clearfil SE Bond had marginal adaptation problems at two years. One case for each adhesive system had slight color change after the same period. CONCLUSION: We can conclude that both adhesive systems tested exhibited very good clinical performance at the end of two years.

Adult↗
PubMedDate not supplied

Two-year clinical evaluation of four polyacid-modified resin composites and a resin-modified glass-ionomer cement in Class V lesions.

OBJECTIVE: The aim of the study was to compare the clinical performances of four polyacid-modified resin composites (F2000, Dyract AP, Compoglass F, and Elan) and one resin-modified glass-ionomer cement (Vitremer) in Class V abrasion/erosion lesions. METHOD AND MATERIALS: Twenty restorations of each of the five restorative materials were placed in noncarious cervical abrasion/erosion lesions by one dentist. No cavity preparation was attempted. All teeth were isolated with cotton rolls and gingival retraction cord. The materials were manipulated according to the manufacturer's instructions and placed with the help of cervical matrixes. Restorations were finished and polished immediately after the placement. Evaluations were performed at baseline and 6 months, 1 year, and 2 years after placement for retention, color match, cavo-surface marginal discoloration, anatomic form, marginal adaptation, secondary caries, and postoperative sensitivity. RESULTS: Retention levels at 2 years were 90% for F2000, 90% for Dyract AP, 89% for Compoglass F, 84% for Elan, and 95% for the Vitremer restorations. No statistically significant differences were found among the materials after 2 years for any evaluation category. CONCLUSION: Polyacid-modified resin composite and resin-modified glass-ionomer cement restorations showed acceptable clinical performance after 2 years.

Adult↗
PubMed2005

A clinical evaluation of packable and microhybrid resin composite restorations: one-year report.

OBJECTIVE: The objective of this study was to evaluate the clinical performance of two packable and one microhybrid resin composites placed in occlusal cavities of posterior permanent teeth after 1 year. METHOD AND MATERIALS: Sixty occlusal restorations were placed in 18 male or female patients aged 21 to 44 years. The restorations were divided into three groups according to the restorative material: G1 (Surefil + Prime&Bond NT); G2 (Filtek P60 + Singlebond), and G3 (Suprafill + Suprafill). They were placed by two previously calibrated operators. The restorations were directly evaluated for color matching, marginal discoloration, secondary caries, wear, marginal adaptation, and postoperative sensitivity. RESULTS: Of the total restorations, 66.7% were scored A (ideal) for color matching; 98.2% for marginal discoloration; 100% for secondary caries; 92.6% for wear; and 92.6% for marginal adaptation. Postoperative sensitivity was reported in 5% of the restorations. Fisher's exact, McNamara's, and chi-square tests did not indicate statistical difference between the groups, related to the evaluated criteria. CONCLUSIONS: The packable (Filtek P60 and Surefil) and the microhybrid (Suprafill) resin composites exhibited excellent clinical performance after 1 year and may be considered possible materials for the restoration of posterior teeth.

Adult↗
PubMed2000

Bonding the gap between petralit and ceromers: with case reviews.

The search for a metal-free, aesthetic restoration with optimal strength, longevity, and comfort easily dates back to the 19th century. However, the popularity of adhesively retained restorations has reached an all-time high due to improvements in wear, post-op sensitivity, bond material and strength, and aesthetic quality. Targis/Vectris, a ceromer restorative material introduced in 1997 by Ivoclar-Williams, is a ceramic optimized polymer that produces a strong fiber-reinforced tooth-colored restoration. It allows the clinician to fabricate metal-free restorations without the fracture potential seen with ceramic materials. Long-term longitudinal studies of this restorative material will be the litmus test, but we now have 10-year studies that show very promising results.

Adhesives↗