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Biomedical subjects

J H Sheen

Publications and source records attributed to J H Sheen.

15 recordsLinked to original sources
PubMed2000

Rhinoplasty: personal evolution and milestones.

Over the past 35 years, aesthetic rhinoplasty has evolved from a generic, reductive operation to a highly individualized, problem-specific operation that often combines augmentation with reduction. The author's experience has been marked by the following conceptual and technical milestones that have contributed to an ongoing exploration and advancement of nasal surgery: (1) vestibular stenosis: diagnosis of a surgical consequence; (2) etiology and treatment of supratip deformity: the dynamic relationship of soft-tissue contour to skeleton; (3) etiology and treatment of the tip with inadequate projection: tip graft design; (4) practical aesthetics of balance: the augmentation-reduction approach to rhinoplasty; (5) support of the middle vault: functional and aesthetic effects; (6) malposition of the lateral crura: recognition and management; and (7) the significance of the middle crura: clinical and aesthetic considerations.

History, 20th Century↗
PubMed1993

Tip graft: a 20-year retrospective.

This paper chronicles a personal experience with nasal tip grafts over 20 years. In the first period (1968-1975), the original graft was designed for use in secondary rhinoplasty cases to obtain both projection of the tip and increased angulation at the columellar-lobular junction. The use was soon expanded to primary patients with inadequate tip projection. During the middle period (1975-1982), the applications for tip grafting were expanded to include many kinds of tip problems (both primary and secondary), cleft lip noses, and various ethnic noses, especially those with thick skin. The incidence of postoperative displacement and/or visibility of the graft was reduced as multiple grafts of solid, bruised, and crushed cartilage became routine. Ear cartilage was first used and ethmoid was abandoned as a primary graft. The incidence of infection was significantly reduced. The current period (1982-1991) is marked by refinements in technique and materials. Greater versatility with graft composition and materials makes possible a variety of tip configurations, custom-made for individual requirements.

Cartilage↗
PubMed1987

The expert teaching system: a new method for learning rhinoplasty using interactive computer graphics.

We have developed software that employs interactive computer graphics to simulate the surgical experience of rhinoplasty by allowing the surgeon to experiment within a model of nasal behavior. For any of three preoperative noses, the surgeon can choose and see the effects of dorsal resection, modification of nasal spine or caudal septum, alar cartilage resection, osteotomy, alar wedge resection, and a variety of nasal grafts. The available choices and views total nearly 3000 images, or approximately 200 different surgical solutions. The surgeon can get textual analysis at any time or see accelerated healing to the projected nasal appearance at 1 year. We believe that the ability to experiment without risk, to safely learn the biological laws governing nasal behavior, should augment the development of surgical judgement in rhinoplasty.

Computer Graphics↗
PubMed1978

Tarsal fixation in lower blepharoplasty.

Proceeding from the premise that a "youthful" eyelid has a pretarsal bulge while a "senile" eyelid has a pretarsal flatness, the tarsal fixation technique for lower blepharoplasty has been introduced--to reposition part of the orbicularis in front of the tarsus to produce a pretarsal bulge. The technique is presented as a suggested adjunct to the usual types of lower blepharoplasty.

Adult↗
PubMed1975

Secondary rhinoplasty.

Secondary rhinoplasty is a highly complex, judgmental type of surgery. It is only through analysis of the successful treatment of various problems in secondary rhinoplasty that meaningful information can be obtained.

Adult↗