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Biomedical subjects

I Pitanguy

Publications and source records attributed to I Pitanguy.

At least 19 recordsLinked to original sources
PubMed1998

Numerical modeling of facial aging.

Facial aging is a biological phenomenon. Skin properties change with time, and gravity and facial expressions exert mechanical deformation. Knowledge of these alterations may suggest ways to reverse them by identifying the corresponding distortional forces. The aim of this study was to determine a pattern of change for parameters of the face during the aging process, based on the numerical fitting of measures from a sample of patients. The first aspect of this study was to define adequate facial parameters and means of measuring them. Subsequently, each parameter was defined individually, and these data were analyzed as a set. The sample for the research was restricted to a group of 40 white female patients with a history of limited exposure to the sun, with ages ranging from 25 to 65. The reason for choosing this sample was the availability of frontal pattern photographs at different ages. The parameters for each patient were measured at two different ages. A strong correlation was found between age and behavior of the parameters. This aging model can be verified qualitatively by comparing photographs of a patient with manipulated photographs simulating aging. The quantitative verification of the model was done through the comparison of the measured and the predicted parameters.

Adult↗
PubMed1997

Rejuvenation of the brow.

Aging of the upper face is a frequent complaint in patients seeking a more youth appearance. Sometimes muscle dynamics are excessively forceful and cause marked lines of expression relatively early in life. Regardless of chronologic age, it is imperative that the surgeon perform a problem-oriented, detailed analysis of the face and each subunit, so that imperfections can be individually assessed as they apply to the harmonic balance of the whole face. Various factors, such as degree of eyebrow ptosis, vertical dimension of the forehead, preexisting scars, and level of hairline, will determine the best approach to surgical correction of the aging brow. In the authors' opinion treatment of the forehead, when done together with a rhytidectomy, requires previous blocking of the cervicofacial flaps so as not to distort important anatomic landmarks when traction is applied to the frontal flap, respecting the patient's desire for a natural aesthetic result.

Adult↗
PubMed1996

Surgical treatment of hemangiomas of the nose.

The approach to a rapidly growing vascular tumor is determined by a number of objective and subjective factors. As a rule, treatment of a hemangioma in an infant is usually delayed, in the expectation that involution will be complete. While most hemangiomas are harmless vascular marks, some may grow to become large, infiltrating masses. Local factors that influence treatment decision making include volume, ulceration, secondary infection, and bleeding of the tumor. Hemangiomas situated on the nose are distinguished from other locations by a few but important aspects and may demand a more aggressive position from the surgeon. An important consideration is the potential for aplasia of the delicate nasal cartilages that are undergoing development, due to the mass effect of the tumor. Nasal tip hemangiomas are slow to regress, and contour deformities result from the fibrofatty tissue that invariably remains even after total involution. More importantly, hemangiomas of the nasal region are particularly prone to causing great social distress to the parents, who will request prompt treatment for such a visible, deforming lesion. A definite solution that ensures removal of affected tissue and preservation of anatomy seems to be the best treatment for these tumors. In this article, the experience of the senior author (IP) in treating hemangiomas located on the nose is reviewed. The elliptical midline incision over the nasal dorsum described in the text was developed to address three important aspects: an expedient procedure to treat a highly disfiguring disease; an open access to allow for complete resection and, at the same time, allow for the correction of underlying cartilaginous disruption; and placement of a scar in an anatomic location proven to be very satisfactory aesthetically, permitting access for secondary procedures for better definition of nasal contour. Careful patient selection for this surgical procedure is emphasized.

Child↗
PubMed1995

The surgical importance of the dermocartilaginous ligament of the nose.

The dermocartilaginous ligament of the nose, as first described by the senior author, has been shown to influence the equilibrium of the dorsum-tip relationship. In some noses, this is manifested by a residual convexity after routine rhinoplastic management of the osteocartilaginous structures. The anatomic findings are reported, and surgical considerations are analyzed. A system of classification based on the thickness of the ligament has been shown to be helpful in the intraoperative evaluation of this structure.

Adolescent↗
PubMed1989

[Treatment of gynecomastia using a trans-areolar incision].

Thirty cases of gynecomastia treated surgically in Rio de Janeiro are presented. Possible aetiological factor are discussed and the technique employed, trans-areolar incision and preparation of two retro-areolar flaps, described. The technique may be associated or not with liposuction.

Adult↗
PubMed1989

[Tissue expanders in plastic surgery of the head and neck. Indications and use].

Tissue expansion allows a functional as well as an aesthetic reconstruction of local defects and thus corresponds to the actual state of the art in plastic surgery.-Tissue expansion provides tissue of the same quality for the repair of defects without leaving deformities on the donor site. It creates local flaps with skin of the same texture, colour and preserved sensitivity.-The use of tissue expanders has grown enormously during the last few years.-A higher rate of complications on the cheek and on the neck must be taken into account.

Head and Neck Neoplasms↗
PubMed1989

Electric burns of the lip.

Young children, usually aged between 1 and 3 years, are frequent victims of electric burns of the lip caused by contact with an electric plug or extension cord. In this article, the authors classify the various types of lesions in 19 cases of electric burns of the lip and discuss surgical treatment approaches.

Burns, Electric↗
PubMed1988

[Surgical treatment of severe lower lid ectropion with a transplant of skin and perichondrium].

A surgical procedure is described for severe ectropions of the lower lid which cannot be treated successfully by conservative measures or minor surgery. This technique, employing a perichondrocutaneous graft, is superior to traditional methods in terms of both the functional and esthetic results. The composite graft is obtained from the anterior surface of the auricular choncha. In about 50% of the patients the postoperative biopsy showed a chondrogenic activity of the transplanted perichondrium substituting the tarsus. In the other cases, though no cartilaginous growth was noted, there was an intense proliferation of collagen fibers stabilizing the lid and the tarsal region. This procedure leads to both functional and natural esthetic rehabilitation and satisfies the criteria which techniques in plastic surgery have to meet today.

Adult↗
PubMed1988

[Abdominoplasty--personal surgical guidelines].

An account is given by the authors of their own guidelines for surgical treatment of deformities of the anterior abdominal wall. The procedures described are based on experience obtained from 866 surgical interventions at the first author's clinic, between 1959 and 1987. Indications, techniques, and complications are discussed in some detail.

Abdominal Muscles↗
PubMed1988

[Facial burns--treatment of sequelae].

The treatment of the sequelae of facial burns is still a controversial subject. The authors present a retrospective study of 1516 cases between 1967 and 1987. They suggest a more conservative approach of the therapy in purely aesthetic lesions. Therefore, they wait for the "softening" of the scars and start an operative treatment after the maturation of the collagen connective tissue. Functional sequelae have to be treated earlier according to their dimension and according to the aesthetic units affected.

Burns↗
PubMed1988

[Reflections on the use of fluid dimethylpolysiloxan in plastic surgery of the head and neck].

The authors present retrospectively results and complications of 47 treatments with fluid dimethylpolysiloxane (silicone). The injections were not administered in the author's surgical department. The history of fluid silicone, its tissue reactions and the aesthetic results obtained are described. Different types of complications and their management are discussed. According to the authors' experience fluid dimethylpolysiloxane has not proved to be a proper material for plastic reconstructive and aesthetic treatment in the head and neck region.

Dimethylpolysiloxanes↗
PubMed1987

[Rhytidoplasty: perioperative guidelines. Particular technical basic details].

The authors present their philosophy of rhytidoplasty and the basic technical details of this kind of operation. The aging face often causes psychological as well as social problems that make patients go to a facial plastic surgeon. The authors stress the importance of an intensive preoperative information. Basic details of preoperative preparation, surgical technique and postoperative care are emphasised because they represent decisive steps in terms of the aesthetic results obtained. These details proved to be mostly important in the course of about 5000 rhytidoplasties.

Face↗
PubMed1986

Augmentation mentoplasty: a critical analysis.

An evaluation of the senior author's mentoplasty technique by use of inorganic silicone and acrylic implants is presented, encompassing 16 years of experience. The evaluation was chiefly concerned with the silicone implant and long-term followup observations of its survival and some of its extrusions and complications.

Adolescent↗