Postoperative Pulpal and Repair Responses

Murray, Peter E.; About, Imad; Lumley, P. J.; Smith, Gay; Franquin, Jean‐Claude; Smith, Anthony J.

doi:10.14219/jada.archive.2000.0175

Cited by 71 publications

(54 citation statements)

References 36 publications

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“…Dentin is the most effective protective barrier to reduce pulpal injury, for example, pulpal inflammation and exposure. The concept of the dentin-pulp complex is well founded and generally recognized [3][4][5][6] . Injury to the pulp may become more intense as a result of tooth preparation.…”

Section: Introductionmentioning

confidence: 99%

Measurement of the remaining dentin thickness using optical coherence tomography for crown preparation

et al. 2014

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This study aimed to investigate the maximum depth imaging and optical properties of the dentin near the pulp by using optical coherence tomography (OCT) and to explore the possibility of measuring the remaining dentin thickness (RDT). Human third molars were used. In experiment 1, the cuspal dentin blocks (0.50-mm to 1.75-mm thickness) were prepared. Each specimen was scanned using OCT. OCT images could be obtained for all specimens with 1.00-mm or less thicknesses. In experiment 2, dentin-pulp complex slices (0.50-mm and 1.00-mm RDT) were prepared. Each specimen was scanned using OCT and micro-computed tomography, and compared. The resulting length change rates of OCT images for the 0.50-mm RDTs were significantly lower than those of the 1.00-mm RDTs. Within the limitations of this study, OCT was effective for measuring the 1.00-mm or less RDT and preventing pulpal injury, while considering the length change rate of OCT image as a variable.

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Section: Introductionmentioning

confidence: 99%

Measurement of the remaining dentin thickness using optical coherence tomography for crown preparation

et al. 2014

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“…A very thin and insufficient layer of RDT (thinner than 0.5 mm) causes very low secretion reaction of dentine. This results in insufficient reparation (Murray et al 2000). Enrichment of composite material resins with the antibacterial compound Chlorhexidine (CHXA) has proven very efficient in slowing down the growth of a biofil on the teeth surface copared to the commercial composite material Z 250 and glass-ionomer cements Fuji II LC and Fuji IX.…”

Section: Discussionmentioning

confidence: 99%

In vivo Evaluation of Marginal Microgaps of Sheep Incisors filled with Two Composite Materials

Figurová

Ledecký

Štvrtina³

2009

Acta Vet. Brno

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The aim of the study was to evaluate the marginal microgaps of two light-induced polymerization composite materials: Filtek P60 (3M ESPE) and Opticor New (Spofa Dental) in ovine teeth in vivo.The restorative materials were placed to type A-cavity to buccal surfaces of permanent teeth (Triadan system 301, 302, 303, 401, 402, 403). The variables of composite materials were evaluated in 3 groups of animals, 2 animals in each, at different time intervals (1, 6 and 9 months after beginning of the experiment). In various time intervals, 12 teeth per group were extracted under general injection anaesthesia, 6 teeth from each animal). Altogether 36 teeth were extracted throughout the experiment.During the experiment we observed neither cracks nor marginal discoloration in both Filtek P60 and Opticor New restorations. Retention of all restorations was 100%.Significant (P = 0.029 ANOVA) differences were observed in the dentin with Filtek P60 packable restorations which exhibited smaller marginal microgaps (OPTICOR NEW and dentin 11.09 , FILTEK P60 and dentin 5.64 μ). The ean size of icrogaps between dentin and the packable coposite aterial Filtek P60 was significantly lower (P = 0.029 ANOVA) in comparison with the microhybrid Opticor New composite restorations. These materials are suitable as permanent restoration of dental cervical caries in sheep and other herbivores, such as those kept in zoological gardens and companion animals. Light-cure filling, dentition, histology, restoration, sheep, experimentAt present, veterinary dentistry often deals with the issue of caries. Due to wrong feeding this disease is diagnosed especially in companion animals kept in apartments (Hale 1998;Capík 2007). Caries (caries dentinum) is a disease of hard dental tissues. It is a multifactorial disease (Vaško et al. 1994;Capík 2008). Advanced dental caries may result in indication for dental crown reconstruction using metal materials (Capík 2005). In stomatology practice, different types of restorations are used.The size of arginal leakages between a filling and cavity wall represents an iportant evaluation criterion of filling aterials in clinical stoatology. These icrogaps arise ainly due to a polyerization shock as well as the coefficient of linear theral expansion of the filling and hard dental tissues. In vitro study by Loguercio at al. (2004) evaluated these microleakages. Specimens were thermocycled (500 cycles between 5 to 55 °C, analogous to changes of cold and hot feed and ingestion of liquids) and immersed in 0.5% methylene blue. The packable composites (e.g. Filtek P60) showed lower polymerization shrinkage compared to the hybrid resin. Food as a negative factor of polymerization shrinkage of composites is described by Attin et al. (1995) at the neck area of a tooth by post-operative sensitivity. When comparing the thermal expansion, Pucklett et al. (1995) concluded that classical glass-ionomeric cements have the lowest thermal expansion. The composites, on the other hand, exhibited the highest thermal ex...

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“…A new bur was used for every tooth in patients and for every fourth tooth in nonhuman primates. The standardized methods and procedures used in this study are congruent with those described elsewhere in patients 3,[30][31][32] and non-human primates.…”

Section: Cavity Preparationmentioning

confidence: 99%

“…[1][2][3] Cytotoxicity describes the molecular events that interfere with macromolecular synthesis causing cellular damage. 4 Biocompatibility describes all the tissue and systemic body reactions to the implantation of materials.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the clinical and preclinical biocompatibility testing of dental materials: Are the ISO usage tests meaningful?

Murray

Garcı́a-Godoy

2006

J Biomedical Materials Res

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International Organization for Standardization (ISO 10993 and 7405) guidelines recommends the preclinical screening of dental materials using non-human primates. The literature contains no comparisons of responses to dental materials. To test the accuracy of preclinical screening tests for predicting human clinical responses, 106 class V pulp exposed cavities were prepared in human and non-human primate teeth. Teeth were restored with calcium hydroxide and amalgam, zinc oxide eugenol or resin-modified glass ionomer. Teeth were extracted after 10-163 days and prepared for histological analysis. Pulp cell numbers were compared and their reactionary dentin activity measured in response to cavity preparation. Pulp inflammatory activity was categorized according to ISO standards. There were no statistically significant differences between human and non-human primate teeth in terms of pulp reactions to dental materials. The use of non-human primates for preclinical biocompatibility investigation provided an accurate method of evaluating clinical responses to dental materials.

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Postoperative Pulpal and Repair Responses

Abstract: Age of the patient affects dentin repair capacity and may be a factor in treatment planning decisions. Minimizing the cutting of dentin, especially the width and base of the preparation, reduces the probability of recurrent pulpal complications.

Cited by 71 publications

References 36 publications

Measurement of the remaining dentin thickness using optical coherence tomography for crown preparation

Measurement of the remaining dentin thickness using optical coherence tomography for crown preparation

In vivo Evaluation of Marginal Microgaps of Sheep Incisors filled with Two Composite Materials

Comparison of the clinical and preclinical biocompatibility testing of dental materials: Are the ISO usage tests meaningful?

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