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Journal of Applied Oral Science :... 2010This paper reports the nonsurgical endodontic therapy using calcium hydroxide intracanal dressing and prosthetic treatment of 9 teeth with periapical lesions in a...
This paper reports the nonsurgical endodontic therapy using calcium hydroxide intracanal dressing and prosthetic treatment of 9 teeth with periapical lesions in a 16-year-old female patient. The periodontal treatment plan included oral hygiene instructions, mechanical debridement and gingivectomy in the maxillary incisors to improve gingival contouring. Root canal treatment was indicated for teeth 11-13, 21, 22, 42-45. After successive changes of a calcium hydroxide intracanal dressing during 6 weeks, the size of the periapical radiolucencies decreased and lesion remission occurred after root canal obturation. The endodontically treated teeth received a bondable polyethylene reinforcement fiber (Ribbond) in the prepared canal space and crown buildup was done with composite resin. Prosthetic rehabilitation was planned with single-unit metal-ceramic crowns and fixed partial dentures. Clinical and radiographic evaluation after 6 months showed successful results. The outcomes of this case showed that chronic periapical lesions can respond favorably to nonsurgical endodontic treatment in adolescent patients and that, with proper indication, polyethylene fibers can provide an effective conservative and esthetic option for reinforcing endodontically treated teeth undergoing prosthetic rehabilitation.
Topics: Adolescent; Bismuth; Crowns; Dental Pulp Necrosis; Denture, Partial, Fixed; Drug Combinations; Female; Gingivectomy; Gutta-Percha; Humans; Periapical Periodontitis; Polyethylenes; Polyvinyls; Post and Core Technique; Root Canal Filling Materials; Root Canal Irrigants; Root Canal Obturation; Root Canal Therapy; Sodium Hypochlorite; Tooth Extraction; Zinc Oxide
PubMed: 20485933
DOI: 10.1590/s1678-77572010000200016 -
British Journal of Pharmacology and... Sep 1960A simple and convenient in vitro technique is described for the screening of compounds for action against Hymenolepis nana and probably many other intestinal worms. The...
A simple and convenient in vitro technique is described for the screening of compounds for action against Hymenolepis nana and probably many other intestinal worms. The results obtained from this test are in broad agreement with the findings of clinical experience and of a small series of in vivo tests. Among the substances tested, the most active ones were oil of chenopodium, dichlorophen, extract of cashew nut (Anacardium occidentale), antimony potassium tartrate, and BIQ 20 [eicosamethylenebis(isoquinolinium iodide)].
Topics: Anacardium; Animals; Anthelmintics; Cestoda; Cestode Infections; Hymenolepis nana; In Vitro Techniques
PubMed: 13750047
DOI: 10.1111/j.1476-5381.1960.tb01269.x -
Journal of Applied Oral Science :... 2009During mechanical preparation of the post space, the root canal filling may be twisted or vibrated, depending on several factors associated with the preparation... (Comparative Study)
Comparative Study Randomized Controlled Trial
UNLABELLED
During mechanical preparation of the post space, the root canal filling may be twisted or vibrated, depending on several factors associated with the preparation technique and quality of filling.
OBJECTIVE
The purpose of this study was to investigate the effect of immediate and delayed post space preparation on the integrity of the apical seal.
MATERIAL AND METHODS
Sixty-four extracted human incisors were biomechanically prepared using the step-back technique. Sixty roots were randomly assigned to 6 experimental groups of 10 teeth each and the remaining 4 roots served as positive and negative controls (n=2). The root canals in the different groups were obturated with cold lateral and warm vertical condensation of gutta-percha and one of two sealers (Sealapex and Diaket). Post space was prepared either individually or simultaneously. An insulated copper wire was cut into 10-cm-long pieces. In each canal, one piece was inserted to maintain contact with gutta-percha and extended to the outside as one of two working electrodes. A stainless steel wire with the same dimensions of those of the copper wire, used as the other working electrode, was immersed into the background electrolyte from the center of the bottle. The electrical current between standard and experimental electrodes in canals was measured over a period of 10 days applying a conductivity meter. The Kruskal-Wallis test (p=0.05) determined whether there was a significant difference in microleakage among the groups and the Mann-Whitney U test (p=0.01) was used for multiple comparison grouping variables.
RESULTS
The results suggest that only the differences between the root canal filling techniques were statistically significant (p<0.01). There were no statistically significant difference in the sealers and the times of filling removal for post space preparation (p>0.01).
CONCLUSION
The quality of the root canal filling is important for the integrity of the apical seal.
Topics: Bismuth; Calcium Hydroxide; Conductometry; Dental Bonding; Dental Leakage; Dental Pulp Cavity; Drug Combinations; Electrodes; Gutta-Percha; Humans; Incisor; Materials Testing; Polyvinyls; Post and Core Technique; Root Canal Filling Materials; Root Canal Obturation; Root Canal Preparation; Salicylates; Time Factors; Zinc Oxide
PubMed: 20027435
DOI: 10.1590/s1678-77572009000600013 -
Antimicrobial Agents and Chemotherapy Jan 1985Bithionol, dichlorophene, and hexachlorophene, which are used in treating some helminthic infections, killed trophozoites of Giardia lamblia and Trichomonas vaginalis in...
Bithionol, dichlorophene, and hexachlorophene, which are used in treating some helminthic infections, killed trophozoites of Giardia lamblia and Trichomonas vaginalis in modified BI-S-33 and Asami media, respectively. Virtually all G. lamblia and T. vaginalis cells were killed within 24 h with a 0.42 mM concentration of these compounds, except that 0.93 mM dichlorophene was required for sterilizing T. vaginalis in the same period. In modified BI-S-33 and Asami media from which bovine and human sera were omitted, respectively, the inhibitory actions of the compounds against in vitro growth of these protozoa were significantly enhanced. Trophozoites of G. lamblia and T. vaginalis could be killed in shorter than 10 min with 0.074 mM dichlorophene and 0.0025 mM hexachlorophene, respectively, in serum-free media. G. lamblia, which was incubated in the complete medium containing dichlorophene, showed a characteristic swelling of the ventral side which led to disruption of the parasite, whereas bithionol caused a thin crack in the cytoplasm of T. vaginalis incubated in Asami medium. The crack appeared to enlarge and result in vacuolization of T. vaginalis. These observations suggest that bithionol, dichlorophene, and hexachlorophene merit further evaluation to ascertain whether they are useful for treatment of giardiasis and trichomoniasis.
Topics: Animals; Bithionol; Dichlorophen; Giardia; Hexachlorophene; Phenols; Trichomonas vaginalis
PubMed: 3872626
DOI: 10.1128/AAC.27.1.65 -
Journal of Investigational Allergology... 2008
Topics: Adult; Dichlorophen; Female; Humans; Hypersensitivity; Patch Tests; Time Factors
PubMed: 18714544
DOI: No ID Found -
Plant Physiology Oct 1978The effects of differing cytokinin and auxin concentrations on resistance of tobacco (Nicotiana tabacum L.) tissue cultures to race 0 of Phytophthora parasitica var....
The effects of differing cytokinin and auxin concentrations on resistance of tobacco (Nicotiana tabacum L.) tissue cultures to race 0 of Phytophthora parasitica var. nicotianae were examined. With 1 micromolar kinetin and either 11.5 micromolar indoleacetic acid or 1 micromolar 2,4-dichlorophen-oxyacetic acid, tissues from resistant cultivars exhibited a "hypersensitive" reaction to zoospores of the fungus and subsequently were colonized only slightly. With susceptible cultivars or with tissues from resistant cultivars supplied with higher cytokinin levels (e.g. 10 micromolar kinetin), this hypersensitive reaction did not occur and tissues were heavily colonized. Benzylaminopurine and kinetin were particularly effective in eliminating both the hypersensitive reaction and disease resistance. Zeatin and 6-(3-methyl-2-butenylamino)purine were less effective. Increases in indoleacetic acid levels reversed the effects of high cytokinin concentrations. The balance of phytohormones apparently controls the host response to the fungus; thus, in this system, resistance or susceptibility can be studied without changing either host or fungal genotype.
PubMed: 16660551
DOI: 10.1104/pp.62.4.522 -
Canadian Journal of Comparative... Jul 1962Various compounds were tested for hymenolepicidal activity against Hymenolepis nana occurring in naturally infested rats. A period of seven days afforded the most...
Various compounds were tested for hymenolepicidal activity against Hymenolepis nana occurring in naturally infested rats. A period of seven days afforded the most critical evaluation of the compounds being tested. Atebrin was the most effective compound followed by Chloroquine. These two drugs were effective in single dose treatments. Dichlorophen was only partially effective in single dose treatments. There was a suggestion of synergism between dichlorophen and Atebrin but no advantage obtained in an Atebrin - Chloroquine combination. Dithiazanine, bithionol and diethyl toluamide were of no practical value.
PubMed: 17649381
DOI: No ID Found