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At least 19 recordsLinked to original sources
PubMed1991

[Use of autologous ear cartilage in eyelid surgery].

Autologous ear cartilage is relatively easy to procure in suitable form and sufficient quantity. At the donor site, there are, as a rule, no complications to be expected. Autologous ear cartilage without conjunctival coverage is of good use for replacing and lengthening the inner layer of an eyelid, not only to reconstruct large eyelid-defects, but also to give additional support and length. The cartilage graft will grow on well, provided the wound is well vascularized. This must not be expected with scarring or poor blood perfusion. The brittleness of the cartilage demands an adapted technique. Precautions to protect the cornea and to prevent adhesions in the fornix are to be taken.

Adolescent↗
PubMed1978

The velocity field of growing ear cartilage.

The velocity vector field of the growing rabbit ear cartilage has been investigated between 12 and 299 days. Empirical curves have been computed for path lines and for velocities between 12 and 87 days. The tissue movement has been found to behave as an irrotational flow of material. Stream lines and velocity equipotential lines have been calculated and provide akinematic description of the changes during growth. The importance of a knowledge of the velocity vector in physical descriptions of growth and morphological differentiation at the tissue and cellular levels is emphasized.

Animals↗
PubMed1976

N6,O2'-dibutyryl adenosine 3', 5'-monophosphate-stimulated release of proteoglycans from cultured immature rabbit ear cartilage.

The stimulatory effects of N6, O2'-dibutyrl adenosine 3',5'-monphosphate on proteoglycan released from immature rabbit ear cartilage were studied in viltro. Cartilage incubayed in medium containing dibutyryl cyclic AMP resulted in a significant increase of proteoglycans released in concentrations above 0.5 mM. Theophylline (1 mM) which did not significantly stimulate proteoglycans released alone, was found to potentiate the action of this nucleotide. ATP, 5'-AMP and butyric acid in the presence of theophylline, did not stimulate proteolgycans released. The addition of protein or RNA synthesis inhibitors depressed proteoglycans released by dibutyryl cyclic AMP and theophylline. Gel chromatogrphic and chemical investigation of the proteoglycans released into the culture media in the presence of dibutylic cyclic AMP indicated a reduction in the proportion of protein associated with these complexes. This result, together with enzyme inhbitor studies, leads us to speculate that the observed action of dibutyryl cyclic AMP on rabbit ear cartilages may be mediated by the neutral proteases.

Acetylglucosaminidase↗
PubMedDate not supplied

Relapsing polychondritis. Electron microscopic study of ear cartilage.

Light microscopic and for the first time electron microscopic (EM) studies of involved elastic ear cartilage in a patient with relapsing polychondritis confirm the superficial location of the inflammatory reaction. EM studies of deep cartilage were identical to those on controls except for a rare necrotic cell. Superficial cartilage showed a finely granular electron-dense material. This material, which may be protein, possibly of enzyme or immunoglobulin origin, also surrounded some elastic fibrils. Findings of predominantly superficial changes and the multisystem disease in the present patient and in many others suggest that the cartilage destruction is part of a systemic inflammatory disease.

Cartilage↗
PubMed1990

[Ear cartilage as tarsus replacement (with long-term results)].

The authors report on 52 lid operations in combination with the transplantation of ear cartilage to serve as tarsus. The preoperative diagnoses were: ectropion (22); entropion (5); tumors (18); lid reconstruction following trauma (7). The long-term results were determined in 24 patients with 29 lids, with an average follow-up time of 26 months. The lid margin fit and the cartilage was palpable in nearly 90% of the long-term results; 83% of the patients were content with the cosmetic outcome.

Cartilage↗
PubMed1979

Ear cartilage grafts to the nose.

We present our experience in the treatment of secondary nasal deformities caused by excessive resection of the nasal dorsum. We have used ear cartilage autografts, with good results and (on the whole) little or no resorption (some have been followed for 10 years). We consider it essential to correctly shape the transplant and to hold it firmly in the proper position for a period of not less than one week.

Cartilage↗
PubMed1978

[Valve-neoglottis by placing ear cartilage and mucosa on inverted lateral tracheal wall after liquid insufficiency of a Staffieri fistula (author's transl)].

Six month after laryngectomy with a neoglottis phonatoria (Staffieri) one patient developed increasing trouble when swallowing liquids. When the patient was operated on again, the upper end of the trachea was closed up to a small anterior opening, by turning the lateral parts of the trachea into the lumen with dexon sutures. On this material cartilage from the ear was transplanted (because of the missing epiglottis) and covered with a free transplant of mucosa from the pharynx underneath the Staffieri fistula. After this second stage operation the patient had no more trouble when swallowing liquids and he developed again a good voice.

Cartilage↗
PubMedDate not supplied

Salvage of ear cartilage in patients with acute full-thickness burns.

Three cases in which the temporoparietal fascial flap was used to salvage denuded ear cartilage during the acute period after burn injury are reported. Patients' burns ranged from 30% to 75% total body surface area. The full-thickness burn was acutely excised, exposing the auricular cartilage. The temporoparietal facial flap was elevated and wrapped around the cartilage. The flap was then covered with a split-thickness skin graft. All flaps and skin grafts survived. Additional reconstructive procedures have been performed on two of the patients and are planned for the third.

Acute Disease↗
PubMed1976

Electron microscopic autoradiography of 35SO4-labelled material closely associated with collagen fibrils in mammalian synovium and ear cartilage.

Electron microscopic autoradiography of connective tissue obtained from mice and rabbits previously injected with 35SO4 indicated that sulphated proteoglycans are localized on collagen fibrils. Ruthenium Red-positive transverse belts surrounding fibrils near the a-bands were heavily labelled, but fine lateral filaments of Ruthenium Red-positive material were not. These filaments, which interconnect collagen fibrils in a variety of connective tissues may represent linear aggregations of hyaluronic acid, glycoproteins and non-sulphated or long-lived sulphated proteoglycans.

Animals↗
PubMed1977

[The ossification of the ear cartilage in Addison's disease].

Stiffening and tenderness of the helix of the ear, with radiologically demonstrable calcific deposits, has been reported in various conditions such as frostbite, and also in Addison's disease. To a total of 14 clinical observations with only 4 well documented cases, a first autopsy report of the disorder in a case of tuberculosus Addison's disease is added. It is shown that the elastic cartilage of the pinna, of the epiglottis and of the trachea undergoes ossification without preceding dystrophic or metastatic calcification. The ossification has been observed only in males with longstanding Addison's disease treated exclusively with mineralocorticoids over a long period. The possible pathogenetic mechanisms are discussed. An important factor seems to be the long-standing glucocorticoid deficiency.

Addison Disease↗
PubMed1991

[A case of recurrent inflammation of ear cartilage].

The clinical course of the recurrent auricle cartilage inflammation was described. In Polish literature there were only 4 cases published. The etiopathogenesis, symptomatology and treatment were described.

Ear Cartilage↗
PubMed1991

Augmentation rhinoplasty: observations on 1200 cases.

Over the past 14 years, from January of 1975 to December of 1988, we have done 1263 aesthetic rhinoplasties using ear cartilage. In the field of augmentation rhinoplasty, many kinds of materials, such as bone, septal cartilage, ear cartilage, and prostheses, were used. In this paper, we limit discussion to our experience with the technique for the augmentation of the nasal dorsum using the ear cartilage and compare this with other materials. Patient ages ranged from 15 to 72 years, with an average of 24 years. Some 95 percent of patients (1199) were female, and only 5 percent (64) were male. Patients were followed for a minimum of 6 months and a maximum of 20 months, with average follow-up only 8 months. Of course, we know that this is a very short follow-up period, but we could not follow patients longer because if they had no complaint about the results at the 6-month visit, they never returned, despite our efforts. Five-hundred and ten of the 1263 patients (40 percent) had been augmented elsewhere, and the silicone prosthesis was already in place. However, 753 patients (60 percent) had no previous operation. For the 510 patients (secondary rhinoplasty patients), too-high or too-large a prosthesis was the largest complaint in number, totaling 378 cases (74 percent), and psychological dissatisfaction, such as pain or an uncomfortable sensation, was the second largest in number, totaling 104 cases (20 percent). For the 753 patients (primary rhinoplasty patients), the main complaint was too-short or too-flat a nose (100 percent).(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗
PubMed1990

Irradiated homologous tarsal plate banking: a new alternative in eyelid reconstruction. Part I. Technique and animal research.

Reconstruction of full thickness eyelid defects requires the correction of both posterior lamella (tarsus, conjunctiva) and anterior lamella (skin, muscle). Tarsal substitutes including banked sclera, nasal cartilage, ear cartilage, and periosteum can be beneficial for posterior lamellar repair, while anterior lamellar replacement, including skin grafts, pedicle flaps, advancement flaps, etc., is important to cover the posterior reconstructed portion. At times, due to extensive tissue loss, the eyelid reconstruction can be particularly challenging. We have found an alternative posterior lamellar reconstructive technique utilizing irradiated homologous tarsal plate that can be particularly useful in selected cases of severe tissue loss. The experimental surgical procedure in monkeys and the histological fate of the implanted tarsus is described in Part I, and followed in Part II by our experience with this tissue in six human patients.

Animals↗
PubMed1991

Excision of exposed cartilage for management of Mohs surgery defects of the ear.

Cartilage of the ear is often exposed during Mohs surgical procedures. Fenestration of the cartilage with a skin punch has been recommended to stimulate granulation tissue where the perichondrium has been destroyed. This article describes an alternative method--the excision of a window through the exposed cartilage, fully exposing the perichondrium on the other side of the cartilage. This promotes the rapid healing by second intention or provides a vascular bed for immediate skin grafting. Also, aggressive excision of nonviable cartilage helps prevent chondritis or perichondritis.

Ear Cartilage↗