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PubMedDate not supplied

Success rates of formocresol pulpotomy and indirect pulp therapy in the treatment of deep dentinal caries in primary teeth.

PURPOSE: This study was performed to retrospectively evaluate treatment of deep caries in primary molars with formocresol pulpotomy (FP) and indirect pulp therapy (IPT). METHODS: 133 primary molars with deep caries approaching the pulp were treated with FP (N = 78) or IPT (N = 55) and followed 2-7 years. All IPTs received immediate stainless steel crowns (SSCs); 61 FPs got an immediate SSC, 13 an intermediate restorative material (IRM), and 4 amalgam. Thirteen IPTs and 25 FPs had pre-operative pain compatible with a diagnosis of reversible pulpitis. Treatment notes and radiographs were independently assessed. RESULTS: Overall IPT success was 93% (51/55) versus 74% (58/78) for FP. Molars with pain compatible with a diagnosis of reversible pulpitis were successfully treated by IPT 85% (11/13) versus 76% (19/25) for FP. FP-treated molars exhibited earlier exfoliation 38% (30/78), while all IPT molars exhibited normal exfoliation. FPs receiving immediate SSCs had 50/61 (82%) succeed; FPs restored with an IRM temporary succeeded 5/13 (39%), amalgam 3/4 (75%). CONCLUSIONS: IPT success was significantly higher than FP (P = 0.01) in the treatment of deep caries. Both IPT and FP were successful in treating teeth with pain compatible with the diagnosis of reversible pulpitis. FP significantly hastened the exfoliation of pulpotomized primary molars (P = 0.001). IPT in primary teeth can be successfully used in a one step procedure. SSCs placed immediately after FP significantly increased FP success vs. FP followed by IRM temporary (P = 0.01).

Chi-Square Distribution↗
PubMed2000

Antimicrobial and chemical study of MTA, Portland cement, calcium hydroxide paste, Sealapex and Dycal.

The objective of this study was to investigate the antimicrobial action of mineral trioxide aggregate (MTA), Portland cement, calcium hydroxide paste (CHP), Sealapex and Dycal. The chemical elements of MTA and two Portland cements were also analyzed. Four standard bacterial strains: Staphylococcus aureus (ATCC 6538), Enterococcus faecalis (ATCC 29212), Pseudomonas aeruginosa (ATCC 27853), Bacillus subtilis (ATCC 6633), one wild fungus, Candida albicans (ICB/USP-562), and one mixture of these were used. Thirty Petri plates with 20 ml of BHI agar were inoculated with 0.1 ml of the experimental suspensions. Three cavities, each one measuring 4 mm in depth and 4 mm in diameter, were made in each agar plate using a copper coil and then completely filled with the product to be tested. The plates were pre-incubated for 1 h at environmental temperature followed by incubation at 37 degrees C for 48 h. The diameters of the zones of microbial inhibition were then measured. Samples from diffusion and inhibition halos were extracted from each plate and immersed in 7 ml BHI broth and incubated at 37 degrees C for 48 h. Analyses of chemical elements present in MTA and in two samples of Portland cement were performed with a fluorescence spectrometer Rx. The results showed that the antimicrobial activity of CHP was superior to those of MTA, Portland cement, Sealapex and Dycal, for all microorganisms tested, presenting inhibition zones of 6-9.5 mm and diffusion zones of 10-18 mm. MTA, Portland cement, and Sealapex presented only diffusion zones and among these, Sealapex produced the largest zone. Dycal did not show inhibition or diffusion zones. Portland cements contain the same chemical elements as MTA except that MTA also contains bismuth.

Aluminum Compounds↗
PubMed2001

Healing process of dog dental pulp after pulpotomy and pulp covering with mineral trioxide aggregate or Portland cement.

Considering several reports about the similarity between the chemical compositions of the mineral trioxide aggregate (MTA) and Portland cement (PC), the subject of this investigation was to analyze the behavior of dog dental pulp after pulpotomy and direct pulp protection with these materials. After pulpotomy, the pulp stumps of 26 roots of dog teeth were protected with MTA or PC. Sixty days after treatment, the animal was sacrificed and the specimens removed and prepared for histomorphological analysis. There was a complete tubular hard tissue bridge in almost all specimens. In conclusion, MTA and PC show similar comparative results when used in direct pulp protection after pulpotomy.

Aluminum Compounds↗
PubMed1992

Vascularization after pulpotomy.

The vascular changes of the pulpal vessels in experimentally induced pulpotomy in dog tooth were investigated using microcorrosive resin casts technique and scanning electron microscopic examination. The pulpal tissues of the permanent mandibular molars were amputated and then dressed with calcium hydrate. At one to eight weeks after pulpotomy, the experimental teeth were prepared for resin casts of pulpal vessels with hard tissues. One week after pulpotomy, a concave region, which was supposed to be due to the compression by the calcium hydrate, was found in the newly formed pulpal vascular network. Around the concave region was a flat, dense capillary network. In eight weeks, the thick dentin bridge was formed in close proximity to the amputated pulpal surface. The vascular network just beneath the dentin bridge changed into similar features in the three layers of the normal pulpal vascular architecture, which are (i) terminal capillary network (TCN), (ii) capillary network (CN), and (iii) venular network (VN) and which distributed in the superficial layer of the pulpal vessels.

Animals↗
PubMed1977

[Biological testing of pulp-preserving agents on the pulp of rat molars].

The effects of calxyl, ZOE, zinc oxide without eugenol, and zinc oxide with an antibacterial substance (glutaraldehyde) were tested on perforated molar pulps of rats. All of the substances tested were found to lead to the same initial reactions (acute inflammation and partial necrosis). Calxyl and ZOE yielded unfavorable results. There was a negligible tendency of the pulp toward hard tissue demarcation. Zinc oxide without eugenol improved the formation by the pulp of secondary tin. - The use of glutaraldehyde resulted in a less pronounced spread of inflammation as well as in the formation of new hard tissue in one half of the cases. Molars of rats are particularly suitable for biologically examining the local toxicity of pulpal protectives and the regeneration of the pulp. The results presented in this paper are discussed from the point of view of pulp-preserving therapy and of avoiding invasion by germs.

Animals↗
PubMed2004

Selected cases of periapical changes treated with calcium hydroxide preparations.

Success in endodontic treatment with application of non-hardening calcium hydroxide preparations to periapical pathosis has been described. The clinical procedures consisted in elaboration of root canals and temporary filling with Biopulp preparation. Control clinical and radiological investigations were carried out after 3 and 6 months. In spite of occurrence of initial periapical pathosis, the method of treatment with calcium hydroxide preparations permitted to achive positive results of healing of periapical pathosis thus eliminating the necessity of surgical operation.

Adult↗