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Biomedical subjects

N Pigadas

Publications and source records attributed to N Pigadas.

7 recordsLinked to original sources
PubMed2000

Precautions against cross-infection during operations for maxillofacial trauma.

One hundred oral and maxillofacial units in the UK were sent a postal questionnaire. Surgical staff of all grades were asked which infection-control measures were taken during the treatment of maxillofacial fractures. Two hundred and ninety-four questionnaires were completed, a response rate of 49%. If the patient was known to be infected by a blood-borne viral disease, significantly more surgeons used standard barrier precautions such as eye protection, fluid-resistant gowns, drapes, ball-ended clips, adhesive tapes and intermediate trays (P<0.0001). Bone-plating techniques were used in preference to wire osteosynthesis (P<0.0001). Only 31 (10.5%) of surgeons routinely used double gloves but 250 (85%) did so if the patient was an infection risk (P<0.0001). Universal precautions were not applied equally to all patients.

Blood-Borne Pathogens↗
PubMed2000

Epithelioid hemangioendothelioma of the parotid salivary gland.

Epithelioid hemangioendothelioma is a borderline neoplasm characterized by proliferation of endothelial cells with epithelioid morphology. The tumor, in terms of histology and behavior, occupies an intermediate position between hemangioma and conventional angiosarcoma. It is encountered in a wide variety of sites, such as soft tissues and skin, visceral organs, and bone. This article describes a slowly growing, painful tumor that developed in the parotid gland of a 48-year-old white woman and was treated with a superficial parotidectomy. Microscopically, the lesion consisted of short strands, cords, or small clusters of epithelioid vacuolated cells that exhibited strong immunoreactivity for endothelial cell markers (CD 31, CD 34, and factor VIII-related antigen). Previous reports have presented epithelioid hemangioendotheliomas in the head and neck region but, to our knowledge, this is the first reported case in the parotid salivary gland.

Biopsy, Needle↗
PubMed1990

[Apicoectomy and reverse filling procedure in posterior teeth].

In this paper, we present the apicoectomy with reverse filling procedure in posterior teeth, as an alternative surgical method, in those cases where conservative endodontic treatment is unable or fails to bring successful results (prosthetic restorations, broken instruments, calcified and tortuous root canals, dens in dente, unfinished root apex). We choose to restrict our presentation in posterior teeth where the surgical procedure is more difficult due to anatomical conditions (maxillary sinus, mandibular canal, number of root canals, inaccessible posterior oral cavity, etc). We analyse the indications of such an operation and the elements we examine to evaluate the cases. We are showing the different stages of the operation as well as the usage of original instruments for the retrograde amalgam procedure. There is a further discussion on problems from the usage of the filling material, the dental amalgam, and, the problems throughout the procedure (level and degree of the apical bevel, cavity preparation, etc).

Apicoectomy↗
PubMed1990

[Surgical removal of a lower semimpacted wisdom tooth displaced in the pterygomandibular space].

In the case which is reported in this paper there was a dislodgement of a semimpacted lower left third molar (38) into the pterygomandibular space, from a removal attempt, without the usual fracture of the lingual plate of the alveolar bone. There is an anatomical description of the pterygomandibular space, the operative complications during removal of impacted lower teeth and more specific the displacement of teeth or roots into adjacent soft tissues, ways of prevention and treatment of such complications. Finally, we describe the technique which we followed to extract the dislocated lower molar in our case.

Adolescent↗