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Results for “DENTAL RESTORATION, TEMPORARY”

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PubMed1992

Effect of temporary cements on the bond strength of a resin cement.

This study evaluated the effect of temporary cements with or without eugenol on the bond strength of a dual-cure resin cement to dentin. Etched, silanated Dicor buttons were bonded to dentin surfaces after pretreatment with the cements. The buttons were sheared in an Instron testing machine. The results showed that shear bond strength is not affected by the temporary cements, if the dentin is cleaned with pumice and treated with Prisma Universal Bond 3 dentin bonding system.

Analysis of Variance↗

PubMed1997

Bactericidal eradication from carious lesions of prepared abutments by an antibacterial temporary cement.

PURPOSE: The aim of this study was to observe the antibacterial potential of polycarboxylate temporary cement containing a mixture of metronidazole, ciprofloxacin, and cefaclor on carious lesions of prepared abutments that were designed to leave caries on the abutments. MATERIAL AND METHODS: Antibacterial efficacy was estimated in vitro and in vivo by measuring bacterial recovery from the lesions. Bacteria counts ranged from 10(4) to 10(7) both in vitro (nine samples) and in vivo (five samples) in time-zero samples, just before the application of the antibacterial cement. RESULTS: No bacteria were recovered from carious lesions in vitro (six samples) or in vivo (four samples) after the lesions were covered by the antibacterial temporary cement. For the remaining samples, some bacteria (5 to 80 counts per sample) were recovered, with one notable exception in which marginal leakage provided a bacteria count of 10(3). Bacteria counts ranging from 10(3) to 10(5) occurred in carious lesions covered by temporary cement without antibacterial agents, which indicated that temporary cement alone was not a potent disinfectant. CONCLUSIONS: The results of this study indicated that the antibacterial temporary cement can be useful for eradicating bacteria from carious lesions of prepared abutments.

Adult↗

PubMed1990

[Provisional restoration materials and clinical procedures].

Temporary restorations, are those, which the period between the clinical preparation and the insertion of the final prosthesis. The existing methods are described in this article, as well as one dedicated to provisionals in osseointegrated implants.

Aziridines↗

PubMed2004

The effect of dentin desensitizers on thermal changes in the pulp chamber during fabrication of provisional restorations.

The purpose of this study was to evaluate the effect of two dentin desensitizers on the pulp chamber temperature increase during fabrication of provisional restorations by a direct method. Sixty intact extracted mandibular third molars were prepared for a metal-ceramic complete crown. Then the teeth were randomly divided into three groups of 20 each. Group 1, no dentin desensitizer was used as the control group; group 2, a resin-based dentin desensitizer was selected; and group 3, the prepared teeth surfaces were coated with polyurethane cyanoacrylate adhesive. Each of the three groups was further divided into two polymerizing systems (autopolymerizing and a photopolymerizing) of 10 each. After insertion of the resin-filled matrix, the temperature change in the pulpal chamber was recorded with thermocouple connected to a data logger. anova indicated no significant differences for all combinations of desensitizing agents and curing methods (P > 0.05). When light cured composite or chemical curing acrylics were used to make temporary crowns, the presence of desensitizing agent did not reduce the temperature transmitted from the provisional material; the residual temperature rise transmitted was of such a magnitude as to cause concern regarding possible thermal injury to pulp.

Body Temperature↗

PubMedDate not supplied

Effects of adhesive liner and provisional cement on the bond strength of nickel/chrome/beryllium alloy cemented to dentin.

OBJECTIVE: Treating teeth with adhesive agents before placing a provisional restoration can prevent tooth sensitivity. This study evaluated the bond strength of resin cements to dentin treated with 2 adhesive agents and 2 provisional cements. METHODS AND MATERIALS: Extracted human molars were prepared by exposing dentin and were treated with either Prime & Bond NT or Clearfil SE Bond. After a simulated impression technique, the teeth were provisionalized with either a eugenol or noneugenol temporary cement. Teeth were cleaned for bonding by either mechanical removal of the cement or use of an acid conditioner. Panavia F and Calibra resin cements were used to cement nickel/chrome/beryllium alloy to the tooth surfaces, and the specimens were debonded. Mean shear bond strengths for each group were calculated. RESULTS: Mean shear bond strengths ranged from 26.6 +/- 5.8 MPa for Calibra bonded to dentin treated with Prime & Bond NT, a noneugenol cement, and mechanically cleaned, to 10.6 +/- 4.4 MPa for Panavia F bonded to unlined (no adhesive) dentin treated with a eugenol cement and mechanically cleaned. Of the 14 groups tested, significant differences were observed related to the adhesives and resin cements. Both temporary cements reduced the bond to dentin not treated with a resin adhesive. Use of an acid conditioner for cleaning the temporary cement also reduced bond strengths in all groups. CONCLUSIONS: Placement of a dentin adhesive before provisionalization may prevent the temporary cement from affecting the bond of the final resin cement to the tooth. For the products used in this study, use of phosphoric acid to clean the tooth surface is not recommended.

Cementation↗

PubMedDate not supplied

[Dimensional instability of zinc oxide-eugenol based temporary sealing materials used in endodontics].

The dimensional instability of temporary sealing materials based on zinc oxide-eugenol was studied in vitro by chemical reaction between an indicator solution (5% nickel sulfate) and a developing solution (1% alcohol dimethylglixime). Thermal cycling was performed (5, 37 and 60 degrees C). Zinc acetate was added to zinc oxide to test its action on dimensional instability. The materials were divided into two groups. 1) group with double sealing (gutta-percha + sealing material), and 2) group without double sealing. It was concluded that none of the temporary sealing materials tested, with or without double sealing, prevented marginal infiltration when submitted to thermal cycling. The addition of zinc acetate to zinc oxide was not effective in preventing marginal infiltration.

Acetates↗

PubMed1990

[Dye penetration of 3 temporary ready-to-use cements].

Dye penetration following obturation of standardized access cavities with three different ready to use temporary cements was compared (Cavit G, Dentorit and Ciprospad). Leakage and dye penetration of the materials were simultaneously evaluated. Ciprospad appears to be the most adapted material.

Analysis of Variance↗

PubMed2000

Prosthetic reconstruction of the edentulous maxilla.

Presurgical planning for the treatment of the maxillary edentulous patient is followed with an entire step-by-step construction of the maxillary prosthesis. I emphasize prosthetic try-ins that ensure proper abutment placement to maximize superior aesthetics and occlusion. Techniques demonstrated will reduce both chair time and stress to the dentist and patient. Also, proper coordination with the laboratory technician frees the doctor from doing time-consuming procedures intraorally. A temporary prosthesis is constructed and used as a guide for the final prosthesis. The efficiency of the following indirect technique allows this service to reach a greater number of patients.

Alveolar Bone Loss↗

PubMed2004

Degradation and formation of bisphenol A in polycarbonate used in dentistry.

To study long-term degradation of polycarbonate (PC) and the formation and the release of bisphenol A (BPA) in vivo and in vitro, PC brackets placed in the oral cavity for 18-40 months as well as bracket, denture plate, and temporary crown placed in water at 37 degrees C for 34 months were examined for the changes of BPA content and molecular weight in PC using high performance liquid chromatography and size exclusion chromatography. BPA release in vitro was also monitored. The BPA content and molecular weight for the brackets in vivo showed a tendency to increase from 38-60 microg/g to 324-697 microg/g and to decrease from 49 x 10(3) - 54 x 10(3) to 43 x 10(3) - 45 x 10(3) during 18-40 months, respectively. The content and total release of BPA in vitro after 34 months were 472 and 37.4 microg/g for bracket, 130 and 2.2 microg/g for denture plate, and 50 and 2.8 microg/g for temporary crown, respectively. BPA appeared to be released more in saliva than that expected from the in vitro data. Additives contained in the PC materials were suggested to influence the formation of BPA.

Benzhydryl Compounds↗

PubMed1993

Potassium nitrate-zinc oxide eugenol temporary cement for provisional crowns to diminish postpreparation tooth pain.

Pulpal injury commonly occurs with tooth preparation for complete fixed partial dentures. This can be documented by the substantial incidence of pain after tooth preparation. In this study, a 4% potassium nitrate-zinc oxide eugenol temporary cement was used to secure provisional crowns over recently prepared teeth and it significantly reduced the incidence and severity of pain after tooth preparation and impression taking.

Adult↗

PubMed2006

Retrospective evaluation of temporary cemented, tooth and implant supported fixed partial dentures.

INTRODUCTION: The aim of this study was to examine the clinical performance of this method, and determine which temporary cement was the most appropriate. METHODS: Dental fixtures (Tiolox implants GmbH, Germany) were implanted and crown and bridgework applied in a private practice between 1998 and 2003. Copings made of pure gold or titanium were permanently cemented onto the prepared teeth. The bridges were attached with either conventional temporary cements (Zinc oxide/ calcium hydroxide based) or acrylic/urethane cement (IMProv) both to the copings and to the implant abutments. Complications were evaluated by a retrospective review in January 2006. RESULTS: A total of 47 patients (response: 81%) with 65 fixed partial dentures could be evaluated. Removal and re-attaching without damage of the dentures was undertaken for the following reasons: for follow-up examinations (n = 31), colour corrections (n = 15), cleaning of the dentures (n = 12), treatment of peri-implantitis (n = 2), repair following ceramic fractures (n = 5), implant failure (n = 1), tooth extractions (n = 2), root canal treatments (n = 2), occlusal corrections (n = 2), or in the case of abutment loosening (n = 4). Accidental detachments with conventional temporary cements occurred more frequently and more rapidly than with IMProv (15% versus 88.7% survival rate after four years). CONCLUSIONS: This method for dental implant supported fixed partial dentures is successful and efficient.

Adult↗

PubMed1999

A comparative study of four coronal obturation materials in endodontic treatment.

The aim of this study was to compare, in vitro, the ability of temporary versus permanent materials to seal the access cavity. Eighty human maxillary single-canal teeth were prepared biomechanically and obturated with gutta-percha and an endodontic cement AH Plus, using the warm vertical compaction technique. All access cavities were sealed with 1 of 4 materials (Cavit, Fermit, Tetric, or Dyract). Microleakage was assessed by methylene blue dye penetration. The teeth were submitted to 100 thermocycles, with temperature varying from 0 degree to 55 degrees C. The greatest degree of leakage was observed with the temporary materials (Cavit and Fermit). There was a significant difference (p < 0.05) in leakage between all materials except between Dyract and Tetric. This suggests that it may be more prudent to use a permanent restorative material for provisional restorations to prevent inadequate canal sealing and the resulting risk of fluid penetration.

Calcium Sulfate↗

PubMedDate not supplied

Retention, marginal leakage, and cement solubility of provisional crowns cemented with temporary cement containing stannous fluoride.

PURPOSE: This in vitro study investigated the (1) retention and microleakage of provisional crowns cemented with temporary cements to which stannous fluoride (SnF2) was added, and (2) solubility of these cements. MATERIALS AND METHODS: Provisional crowns were constructed of acrylic resin with shoulder preparations for 12 molars. The crowns were luted with Tempbond, Tempbond NE, and Freegenol temporary cements, and also with SnF2 added to these cements. Specimens were thermocycled 100 times, stored for 6 days, and immersed in 0.5% basic fuschin. Seven days after cementation, crown removal (retention) tests were conducted. Marginal leakage was assessed using a five-level scale to score dye penetration. Solubility in water of the cements with and without SnF2 was assessed using cement disks. RESULTS: Freegenol was more retentive than the other cements. The incorporation of SnF2 significantly increased the retention capacity of Freegenol and Tempbond NE but had no effect on Tempbond. Tempbond showed significantly higher dye penetration than Freegenol. The addition of SnF2 did not alter the dye penetration of the cements. There were no significant differences in the solubility of the cements. However, the incorporation of SnF2 increased the solubility of Freegenol and Tempbond NE (P < .001) and Tempbond (P < .01). CONCLUSION: The addition of SnF2 increased the retention of temporary crowns cemented with Tempbond NE and Freegenol but did not affect the retention of those cemented with Tempbond. The marginal leakage of crowns cemented with the tested temporary cements with and without the incorporation of SnF2 was similar. However, the addition of SnF2 increased the solubility of the cements.

Acrylic Resins↗

PubMed2005

Microbial leakage of Cavit, IRM, and Temp Bond in post-prepared root canals using two methods of gutta-percha removal: an in vitro study.

The aim of this study was to evaluate the integrity of the coronal seal of Temp-Bond and compare it to Cavit and IRM after post space preparation using S. faecalis as a microbial tracer. In addition, the affect of two methods of gutta percha removal on the apical seal of root canal fillings was also evaluated. Forty extracted human single rooted teeth were prepared chemomechanically and obturated with gutta percha and AH26 sealer cement using the lateral cold condensation technique to a standardized working length of 15 mm. About 10 mm of the coronal gutta-percha was removed with either Peeso-reamer or a hot plugger. The roots were divided into three experimental groups of 10 roots and a control group. Each experimental group was subdivided equally into two groups of 15 each according to the method of post space preparation. Cavit, IRM, and Temp-Bond were used to seal the access opening. Each root was fixed in a cuvette containing Tryptic Soya Broth which, covered 2 mm of the root apex. Bacterial suspension was introduced through pipette. Fresh bacterial suspension was added every week, and the system was monitored daily for the growth of microorganisms for a period of one month. The results showed there was no significant difference in terms of coronal leakage between the three coronal materials used (P=0.478), but the methods of gutta-percha removal did have an impact on the apical leakage (P=0.047). The mean value showed the Peeso-reamer provided less leakage compared to using a hot plugger during the 30-day experimental time period. It was concluded the temporary type of coronal seal of endodontically treated teeth will not prevent coronal leakage if left for a long period of time. In addition, permanent cementation of the post with the coronal restoration should be carried out as soon as possible to prevent recontamination of the root canal.

Analysis of Variance↗

PubMed2002

Effects of different types of temporary cements on the tensile strength and marginal adaptation of crowns on implants.

PURPOSE: The aim of this study was to evaluate the influence of four different types of temporary cements, Tempbond (Kerr), Tempbond NE (Kerr), Improv (Sterioss), and Dycal (Dentsply/Caulk), on the marginal adaptation and tensile strength of prosthetic specimens cemented on replicas of CeraOne abutments. MATERIALS AND METHODS: Four test groups were formed: Group 1 (G-1), Tempbond (Kerr); Group 2 (G-2), Tempbond NE (Kerr); Group 3 (G-3), Improv (Sterioss); Group 4 (G-4), Dycal (Dentsply/Caulk). For the specimens, gold cylinders (DCB 160, Nobel Biocare) adapted to stainless steel replicas of CeraOne abutments (Nobel Biocare) were utilized. The replicas on a stainless steel base were made in a special machine for implant components. The cement thicknesses for each luting agent were measured using a Measurement Comparative Microscope (Mitutoyo). The readings obtained before cementation were used as the controls (G-0). Following each group's cementation, the specimens were submitted to tensile strength tests with a Universal Testing Machine (Kratus). RESULTS: The results of the marginal adaptation test as reflected by cement thicknesses were: G-0 = 11.7 microm, G-1 = 35.7 microm (+/- 8.8), G-2 = 41.7 microm (+/- 9.0), G-3 = 32.6 microm (+/- 9.7) and G-4 = 38.2 microm (+/- 6.7). The tensile strength tests yielded the following values: G-1 = 58.5 N (+/- 14.8), G-2 = 51 N (+/- 8.2), G-3 = 61.8 N (+/- 17.1) and G-4 = 71.8 N (+/- 9.3). CONCLUSION: The four temporary cements tested all provided similar marginal adaptation. G-4 (Dycal) showed a higher tensile strength than G-2 (Tempbond NE).

Analysis of Variance↗

PubMed1978

Temporary restorative materials: properties and uses.

Various materials used for temporary restorations are reviewed, with reference to their chemical and physical properties. Research and standard specifications should be instituted in order to standardize and improve the many products now available to the profession. Knowledge of the materials and their properties will enable the dentist to arrive at correct selection of the material for each case, thus promoting more successful clinical procedures.

Acetates↗

PubMed1996

Clinical evaluation of bacterial leakage of endodontic temporary filling materials.

This study was an in vivo comparison of the bacterial leakage associated with three endodontic temporary restorative materials: Cavit, Intermediate Restorative Material (IRM), and TERM. The access openings of 51 endodontically treated teeth were randomly sealed with a 4-mm thickness of one of the three materials. Three wk after placement of each temporary restoration, bacterial leakage was evaluated by sampling from beneath the temporary restoration and then culturing the samples both aerobically and anaerobically. Positive growth occurred in 4 of 14 TERM samples and in 1 of 18 IRM samples. Cavit did not demonstrate leakage in any of the teeth in which it was used. Cavit provided a significantly better seal than TERM over the study period.

Calcium Sulfate↗

PubMed2000

Microleakage of different types of temporary restorative materials used in endodontics.

A temporary filling should seal the endodontic access cavity to avoid reinfection of the root canal system during endodontic treatment. The aim of this study was to evaluate the marginal seal of four temporary filling materials in endodontic access cavities in vitro, using the dye penetration method. Endodontic access cavity preparations were in 50 incisor and 50 molar noncarious nonrestored crowns of extracted human teeth. The coronal access of 10 teeth per group were filled with Coltosol, Algenol, IRM, Fermit or Fermit-N. After storing the teeth in demineralized water for 48 hours, they were immersed in 2% methylene blue dye for 24 hours. All the teeth were sectioned longitudinally and the linear depth of dye penetration was evaluated under a stereomicroscope. There was no significant difference in the microleakage observed in the high elasticity light-cured resin composite (Fermit) versus the low elasticity light-cured resin composite (Fermit-N) groups (p > 0.05).

Calcium Sulfate↗