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At least 523 records · Page 29Linked to original sources
PubMed1996

Emergency reattachment of fractured tooth. Using dentin bonding agent and flowable composite.

A case has been described that employed two restorative techniques used in novel ways. A dentin bonding system was used to reattach a fractured tooth fragment and a new flowable resin composite was placed to "fill in the cracks." This technique was recommended only as a temporary restoration and was used during an emergency visit. The restoration was accomplished in a timely fashion and can be recommended for use if excellent technique, including the use of the rubber dam, is followed.

Adult↗
PubMed2005

Temporary restorative resins using non-phthalate ester plasticizers.

OBJECTIVE: This study examined temporary restorative resins that use non-phthalate ester plasticizers. METHODS: Three non-phthalate plasticizers were tested: tri-ethyl citrate (TEC), tri-butyl citrate (TBC), and di-butyl sebacate (DBS). The experimental resins were compared with resins that use a phthalate ester plasticizer (di-butyl phthalate, DBP) and commercial products (Dura Seal, Plast Seal, and Fit Seal). For the experimental resins, the ratio of plasticizer to PMMA/MMA resin was varied from 30 to 60% (wt). The mechanical properties of the experimental resins were evaluated using a modified diametral compressive strength and the resistance to explorer insertion. RESULTS: The strengths of the experimental resins with plasticizer concentrations ranging from 40 to 50% (TEC, TBC, and DBP) or from 30 to 40% (DBS), by weight, were equivalent to the strengths of commercial temporary restorative resins. A similar tendency was seen for the resistance to explorer insertion. CONCLUSIONS: The results suggest that new temporary restorative resins can be prepared by choosing the appropriate proportions of resin monomer and non-phthalate ester plasticizer.

Citrates↗
PubMed1997

Comparative in vitro investigation of different methods for temporary root canal filling with aqueous suspensions of calcium hydroxide.

Three methods for temporarily filling root canals with calcium hydroxide pastes were compared. Each of 20 root canals of extracted, human, single-rooted teeth was shaped with hand instruments under standardized conditions up to ISO size 50 and filled using a syringe system, a lentulo spiral or an endodontic reamer. Quality of fillings was assessed radiographically and by inspecting ground preparations. Ridit (relative to an identified distribution) analysis was employed to confirm differences in frequencies of certain quality criteria obtained with various application methods. With regard to degree of obturation and occurrence of porosities, application of temporary fillings with a lentulo spiral or syringe system revealed significantly better results than application with hand instruments (reamer). No differences with regard to degree of obturation were detected when comparing results obtained with syringe or lentulo. Fewer porosities in the apical part of the root canal were seen, both on radiographs and ground sections, with the syringe system compared with the lentulo spiral. In the presence of some contradictory reports found in the literature, the present study suggests that, after straight or slightly curved root canals have been shaped up to at least ISO size 50, high quality temporary root canal fillings may be obtained by application of an aqueous suspension of calcium hydroxide with a syringe system.

Calcium Hydroxide↗
PubMed1994

The effect of eugenol containing and non-eugenol temporary cements on the resin-enamel bond.

This study was undertaken to compare the effect of eugenol containing and non-eugenol temporary cements on the bond strength of three brands of luting cements to enamel. Flat enamel surfaces were prepared on 90 surgically removed, unerupted, human third molar teeth. The teeth were randomly divided into three groups of thirty. The flat enamel surfaces in two of the groups were treated with either a eugenol containing or non-eugenol temporary cement and the third group was left untreated. The teeth were stored in water for 7 days and the cements then removed and all surfaces etched. The teeth were divided into 9 sub-groups of 10 each and one of the three resin cements was then bonded to each sub-group. The relevant shear bond strengths were determined after 7 days. The results indicated that prior use of a eugenol containing temporary cement reduced the resin cement-enamel bond strengths. No differences were found between the bonds achieved by the three brands. It was concluded that eugenol containing temporary cements should not be used prior to bonding with resin luting cements.

Analysis of Variance↗
PubMed1990

Microleakage of temporary endodontic restorations in teeth restored with amalgam.

Microleakage of seven temporary restorative materials was evaluated in endodontic access preparations made in teeth restored with amalgam. Ten teeth were used for each of the seven materials: Cavit, Cavit-G, TERM, zinc phosphate cement, polycarboxylate cement, glass ionomer cement, and IRM. A class I amalgam was placed in the occlusal surface of each experimental tooth and an endodontic access preparation was made entirely within the amalgam. Then the access preparation was restored with one of the temporary restorative materials, and microleakage was evaluated using a fluid filtration technique. The amount of microleakage was quantitated by measuring the fluid flow at 15 min, 1 h, 24 h, 1 wk, and 2 wk after insertion of the temporary restoration. Cavit, Cavit-G, TERM, IRM, and glass ionomer cement all provided excellent seals while zinc phosphate cement and polycarboxylate cement provided less effective seals.

Dental Amalgam↗
PubMedDate not supplied

[Nonsurgical retreatment in a case of a radiolucent apical lesion].

We present a case of failure that was helpful solved without surgical endodontic treatment. We don't achieve clinical success besides endodontic treatment was twice remade. Finally we decided to put a temporary filling with calcium hydroxide and wait until apical radiolucency disappear and complete our treatment with gutta-percha, sealer and lateral condensation.

Adolescent↗
PubMed1998

Microleakage of TERM used with sodium perborate/water and sodium perborate/superoxol in the "walking bleach" technique.

This study compared the sealing ability of TERM as an interim restoration for the "walking bleach" technique when using either sodium perborate/water or sodium perborate/superoxol. Thirty-three extracted maxillary premolars were restored with TERM after placing either a cotton pellet (control), a paste of sodium perborate and water, or a paste of sodium perborate and superoxol in the chamber. Microleakage was assessed at 24 h, 8 days, and 15 days using a fluid filtration method. Statistical analysis revealed both "walking bleach" groups had significantly higher numbers of teeth demonstrating microleakage than the control group. There was no statistically significant difference in microleakage between the two "walking bleach" groups. The results of this study indicated that the temporary restorative material, TERM, provided an unsatisfactory seal when used with either walking bleach technique. When used over a cotton pellet, TERM provided an excellent seal.

Borates↗
PubMedDate not supplied

Effects of thermocycling on the tensile bond strength between resin cement and dentin surfaces after temporary cement application.

PURPOSE: In a previous study the authors found that 2 of 3 tooth conditioners examined were able to reduce the negative effect of temporary cement on the bond strength between resin cement and teeth. The aim of this study was to evaluate the bond durability with the conditioners, as well as their capability for temporary cement dissolution. MATERIALS AND METHODS: After eliminating the temporary cement with a curette from the bovine dentin surface, a conditioner (ethyl dihydrogen phosphate, EP; or methacryloxyethyl dihydrogen phosphate, MEP) was applied to the surface and a resin cement was adhered. Tensile bond strength measurement, scanning electron microscopic observation, and energy-dispersive analysis were carried out without thermocycling and after thermocycling. RESULTS: The tensile bond strength gradually decreased with an increase in the number of thermocycles. However, specimens treated with EP or MEP showed significantly higher tensile bond strength values compared to those that did not receive conditioner application (P < 0.0001); EP showed significantly higher tensile bond strength values compared to the specimens that did not receive both temporary cement and conditioner application (P < 0.0001). The scanning electron microscopic, energy-dispersive, and solubility analyses suggest that both conditioners have the capability of dissolving temporary cement remnants. CONCLUSION: Both EP and MEP have potential value as conditioners to reduce the negative effect of temporary cement on the bond strength between resin cement and dentin and to improve the bond durability.

Analysis of Variance↗
PubMed1994

The effect of margin design on the marginal adaptation of temporary crowns.

Accurate marginal fit and proper contour and surface finish of a temporary crown are needed to maintain healthy contiguous gingiva before the placing of the final restorations. In this study, the effect of two finish line types and the period of their remaining in the mouth on the marginal adaptation of temporary crowns was examined. According to our research findings, although no statistically significant difference was found between the marginal adaptation of the crowns of the chamfer and shoulder types, after 7 days a discrepancy of an important degree was observed in the shoulder type crown (t = 2.379, P < 0.05).

Acrylic Resins↗
PubMed1989

[Comparative study of the seal and porosity of provisional coronal filling materials in endodontics].

The porosity and the leakage properties of 13 temporary fillings used between each appointment during endodontic treatment were investigated by means of thermocycling and dye staining of the interface between the teeth and the filling material. A scanning electron microscope was also used for these observations. The 8 commercially produced temporary fillings seal adequately the cavity whereas the 5 materials prepared and mixed by the practitioner allowed wide staining diffusion and therefore were leaky.

Calcium Hydroxide↗
PubMed1997

The dual bonding technique: a modified method to improve adhesive luting procedures.

Indirect restorative procedures usually require temporary restorations for protection of the pulp and for restoring the patients esthetic and functional needs. The use of temporary cements, either with or without eugenol, however, considerably decreases the adhesion of the bond on dentin if--according to the conventional technique--such dentin bonding systems are applied once at the moment of final cementation. With a dual application of the dentin bonding agents a considerable increase in bond strength values was discovered. This article presents a modified luting procedure called the "dual bonding technique."

Adult↗
PubMed2002

Calcium hydroxide as a temporary filling of the post space in root-filled teeth.

OBJECTIVE: The purpose of this in vitro study was to evaluate whether the saline content of the calcium hydroxide paste used as a temporary filling in the post space of root-filled teeth would significantly affect the seal of the apical root fillings (gutta-percha and zinc oxide-eugenol based sealer) during a period of 1 month. STUDY DESIGN: Eighty extracted single-rooted and multirooted teeth were cut at the cemento-enamel junction. They were endodontically instrumented and filled with zinc oxide-eugenol based sealer and gutta-percha. A post space was immediately prepared on 70 teeth. The experimental teeth were then randomly divided into 4 groups: A, post space filled with calcium hydroxide paste (30 teeth); B, post space without calcium hydroxide paste (30 teeth); C, negative controls (10 teeth); and D, positive controls (10 teeth). The teeth were stored in a humidified chamber at room temperature for a month. After storage, the calcium hydroxide paste in the post spaces in group A was removed. All roots were coated with 2 layers of nail varnish and sticky wax externally, placed in a glass bottle containing methylene blue, and subjected to a vacuum for 15 minutes. The teeth were then stored for another week, sectioned in half longitudinally, and examined for dye penetration. The mean and standard deviation of dye penetrations for each group were calculated, and a Student t test was used to determine the statistical difference between the groups. RESULTS: There was no significant difference in the coronal dye leakage of the apical root fillings between the post spaces filled with the calcium hydroxide paste and those without during a period of 1 month. CONCLUSIONS: The saline content in the calcium hydroxide paste placed in the post space as a temporary filling did not significantly affect the seal of the apical root fillings during a period of 1 month by using a dye leakage study.

Calcium Hydroxide↗
PubMed2006

Antibacterial properties of temporary filling materials.

The purpose of this study was to investigate the antibacterial properties of temporary fillings. The direct contact test (DCT) was used to evaluate the antibacterial properties of Revoltek LC, Tempit, Systemp inlay, and IRM. These were tested in contact with Streptococcus mutans and Enterococcus faecalis. The materials were examined immediately after setting, 1, 7, 14, and 30 days after aging in phosphate buffered saline (PBS). Statistical analysis included two-way ANOVA, one-way ANOVA, and Tukey multiple comparison. Systemp inlay, Tempit, and IRM exhibited antibacterial properties when in contact with S. mutans for at least 7 days, Tempit and IRM sustained this ability for at least 14 days. When in contact with E. faecalis Tempit and IRM were antibacterial immediately after setting, IRM sustained this ability for at least 1 day. Our study suggests that the difference in temporary filling materials may influence which microorganism will be able to invade the root canal system.

Analysis of Variance↗
PubMedDate not supplied

Reaction exothermia of 2 relining resins for temporary crowns.

AIM: The aim of the study was to evaluate the reaction exothermia of 2 relining resins for temporary crowns. The resins used were Duralay, a methacrylate-based resin, and Protemp II, a bisacrylic resin. METHODS: The coronal parts of an adult molar and of an impacted one were used. Abutments were obtained from the crowns, while the radicular part was sectioned in order to insert a thermocouple into the pulpal chamber. During the experiment the tooth with the polymerising resin was put into an oral cavity simulator to keep a constant temperature. The thermal increase during polymerisation of the 2 resins was recorded for 6 minutes at 5 seconds intervals and with 1 and 2.5 mm dentin thickness (n = 10). Data were statistically analysed by variance analysis with Scheffe test. RESULTS: The intrapulpal thermal increase was significantly higher in relation to the type of resin (Duralay p < 0.0001), thickness (1 mm p < 0.0001) and type of dentin (young dentin p < 00001). CONCLUSIONS: In order to protect the pulp, during the direct relining of a temporary crown, it is recommendable to choose the best combination among resin, type of dentin and its residual thickness, besides adequate cooling techniques.

Composite Resins↗
PubMed1993

An evaluation of the effect of methylene blue dye pH on apical leakage.

The effect of varying the pH of 2% methylene blue dye on apical leakage was evaluated. Eighty-four roots of extracted human teeth were used in this study. The roots were endodontically cleaned and shaped, obturated, apically resected, and amalgam or Temporary Endodontic Restorative Material retro-fillings were placed. The roots were immersed for 7 days in dye solutions of controlled pH of 1, 2, 3, 5 or 7, or in a 2% unbuffered deionized water solution of methylene blue. The results demonstrated significantly less leakage in the pH 1 and 2 amalgam groups. All other amalgam groups and the Temporary Endodontic Restorative Material groups showed no significant differences attributable to pH. Temporary Endodontic Restorative Material retrofilling groups demonstrated statistically significantly less apical leakage at each pH evaluated than the amalgam-retrofilled groups. Additionally, a significant buffering effect of the root structure on the dye solutions was measured.

Composite Resins↗
PubMed1996

Effect of resinous temporary material on tensile bond strength of resin luting cement to tooth substrate.

We investigated the effect of resinous temporary material on the tensile bond strength of resin luting cement to enamel and to dentin. Four hundred bovine incisor teeth were randomly divided into groups. Four resinous temporary materials and four resin luting cements were used. On enamel, none of the resinous temporary materials decreased the tensile bond strength of the cements. On dentin, all the resinous temporary materials decreased the tensile bond strength of the cements except one containing 4-META/MMA-TBB.

Animals↗