Biomedical subjects
Publications and source records attributed to F Viterbo.
Trigonocephaly has been described either as an isolated anomaly or as part of the clinical spectrum of some well-known syndromes. Treatment, complications, and prognosis are closely related to the manifestations of the associated anomalies. We report on the main types of syndromes with trigonocephaly and the management of this condition.
The purpose of this study was to develop an experimental model in rabbits that would permit us to analyze skull reconstruction and enable the study of bone autografts, osteofacial flaps, and other materials. We use the rabbit model to study the early integration of the skull autograft and to demonstrate the relationship between radioisotopical and histological analyses.
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A new treatment of frontal sinus hypertrophy is described. The anterior wall is removed, inverted, and attached again. The resulting depression is filled with bone dust. Details are discussed, and a case is presented.
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Termino-lateral neurorrhaphies have been used up to the beginning of this century. After this period, they have no longer been reported. We tested the efficacy of a new type of latero-terminal neurorrhaphy and evaluated the role of the epineural sheath. A group of 10 rats had the fibular nerve sectioned and the distal ending was sutured to the lateral face of the tibial nerve without removing the epineurium. All experiments were made on the right side, the left one remaining untouched in half of the animals of each group. The other half were denervated by sectioning and inverting the endings of the fibular nerves. In this way, tibial cranial muscles were either normal or denervated in the left side and reinnervated through latero-terminal neurorrhaphy in the right side. After 7.7 months, the animals were subjected to electrophysiological tests, sacrificed, and the nerves and muscles were taken for histological exams. A response of the tibial cranial muscle was obtained in 75% of the animals. The distal ending of the fibular nerve showed an average of 498 nerve fibers. The average areas of the reinnervated tibial cranial muscles were (mu 2):841.30 for M2n and 1798.33 for M2d. We concluded that the termino-lateral neurorrhaphy was functional, conducting electrical stimuli and allowing the passage of axons from the lateral surface of a healthy nerve, to reconstitute the distal segment of a sectioned nerve. The presence of the epineurium was no impediment to axonal regeneration or to the passage of electrical stimuli.(ABSTRACT TRUNCATED AT 250 WORDS)
Various congenital craniofacial deformities show hypoplastic paranasal sinus. The Treacher Collins, the Apert and Crouzon Syndromes and the Hemicraniofacial Microsomy, among others, are typical examples of this observation. Stimuli to the growth of the paranasal sinus during the facial growth period could sensibly improve the treatment of deformity, or even avoid later surgeries. Since their introduction in plastic surgery, tissue expanders are progressively acquiring greater importance in many areas of the specialty. This is a safe and simple alternative to solve difficult cases. It has been demonstrated that real tissue growth occurred in all layers of cutaneous tissues subjected to expansion, including the induction of mitoses. Recent works showed that microorbits could be corrected through the introduction of expanders in their orbits. The authors proposed that to stimulate the growth of paranasal sinus, tissue expanders should be introduced bilaterally in the maxillar, frontal, ethmoidal and sphenoidal sinus, which should promote the development of the face. The expansion induced should be controlled and gradual through injections of small amounts of saline in each session. This project includes the cautious design of the size and shape of the expanders as well as the care with adequate draining of the sinusal cavity and the possible mechanical atrophy of the mucosal lining of the sinus.
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