The effect of tooth cleaning procedures on fluoride uptake in enamel.
The purpose of this project was to examine the effect of various toothcleaning procedures on fluoride
uptake by enamel of human permanent teeth.
Allergy to mercury in dental amalgam
Amalgam is still one of the most useful and widely used dental filling materials. On rare occasions however allergy to one of its constituents may preclude its use. In such instances confirmation is required so that an appropriate treatment plan may be formulated and submitted (if necessary) to the Dental Estimates Board (DEB) for approval.
Jaw bone cavities associated with facial pain syndromes.
Facial pain syndromes pose a perplexing problem to clinicians from a standpoint of diagnosis and treatment, and the ambiguities encountered in categorizing a pain,: syndrome add to the problem. For clarity we will begin by defining our criteria for assigning a diagnosis of either tri: geminal neuralgia or atypical facial neuralgia
Garre’s osteomyelitis: a case report.
One case of Garre’s osteomyelitis involving the mandible was seen, treated and documented. It was treated by extraction of the causal infected tooth with no supplement of antibiotics. The patients experienced a complete regression of the lesion within six months.
Galvanic cells including cobalt-chromium alloys.
Galvanic cells may be created when dentures made of cobalt-chromium alloys are placed on teeth with metallic restorations. The power of such cells was evaluated in an in vitro galvanic using amalgams, gold alloy, and nickel-chromium alloys. The amalgams and one of the nickel-chromium alloys revealed high corrosion currents when placed in contact with cobalt-chromium alloy, the conventional amalgam showing the highest values. The gold alloy and another nickel-chromium alloy exhibited low corrosion currents and they were noble with respect to cobalt-chromium.
Exposure to mercury and silver during removal of amalgam restorations.
The content of particulate matter and mercury vapor in dentist breathing air during removal of amalgam restorations was assessed. Mercury and silver were quantitatively assayed by nuclear chemical analysis, and the mercury vapor concentration was measured with a sniffer. When the water spray was not used, the short time threshold limit values for exposure to mercury and silver were exceeded about 10 times. With water spray the mercury content was reduced to a level considerably lower than the threshold limit value, whereas the silver concentration slightly exceeded the corresponding limit.
Galvanic currents between gold and amalgam.
The galvanic currents between gold and amalgam were determined in vitro in aerated artificial saliva kept at 37 degrees C. Using conventional amalgam, the current between gold and amalgam was rapidly fluctuating, and both the magnitude of this fluctuation and the maximum current density increased with increased ratio between the gold and the amalgam surface area (G/A). The current density exhibited by the non-gamma 2 amalgam was lower, independent of G/A, and showed no fluctuations.
Etiology and treatment of idiopathic trigeminal and atypical facial neuralgias.
In a series of sixteen patients with idiopathic trigeminal neuralgia and twenty-one patients with atypical facial neuralgia, it was found that the painful phenomena associated with both disorders were, in nearly all instances, closely related to the presence of maxillary or mandibular bone cavities at previous tooth extraction sites. Standard oral surgical procedures for curettage of the cavities, together with administration of antibiotics, were employed in the successful treatment of both the trigeminal and atypical facial neuralgias, with complete pain remissions for periods varying from 2 months (for most recently treated cases) up to 9 years. The observations and results of this study suggest that dental and oral disorders may play a role in the genesis of trigeminal and atypical facial neuralgia.
Jawbone cavities and trigeminal and atypical facial neuralgias.
The possible role of dental and oral disease in the etiology of idiopathic trigeminal and atypical facial neuralgias has been examined. Among thirty-eight patients with idiopathic trigeminal neuralgia and twenty-three patients with atypical facial neuralgia, there was in nearly all instances a close relationship between pain experienced and the existence of cavities in alveolar bone and jawbone of the patients. The cavities were at the sites of previous tooth extractions and, although at times more than 1 cm. in a given diameter, were usually not detectable by x-rays. A new method for their detection and localization was developed empirically, based on the observation that peripheral infiltration of local anesthetic into or very close to the bone cavity rapidly abolished trigger and pain perception by patients during persistence of the anesthetic action. Histopathologic examination of bone removed from cavities by curettage revealed, in both idiopathic trigeminal and atypical facial neuralgias, a similar pattern characterized by a highly vascular abnormal healing response of bone. Some lesions presented a mild chronic inflammatory (lymphocytic) infiltration. Preliminary microbiologic studies of material from the walls of the cavities showed the existence within them of a complex, mixed polymicrobial aerobic and anaerobic flora. Treatment consisted of vigorous curettage of the bone cavities, repeated if necessary, plus administration of antibiotics to induce healing and filling-in of the cavities by new bone. Responses of patients to the above treatment consisted of marked to complete pain remissions, the longest of which has been for 9 years. Complete healing leads to complete and persistent pain remissions. It was concluded that in both idiopathic trigeminal and atypical facial neuralgias, dental and oral pathoses may be major etiologic factors.
Zum Nachweis der Lyse von Hg aus Silber-Amalgam von Zahnfullun-gen.
As a dental donor, patients were selected who either because of necessary prosthetic restorations or
in children due to other conditions, which also made the removal of teeth necessary. In rare cases
pulpitis was the reason for extraction.