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Biomedical subjects

Samson Lee

Publications and source records attributed to Samson Lee.

12 recordsLinked to original sources
PubMed2006

Advances in scalp reconstruction.

PURPOSE OF REVIEW: The present review summarizes traditional and advanced techniques used to reconstruct defects of the scalp. These deformities range from small defects that can be closed primarily to significant defects, which require free tissue transfer. RECENT FINDINGS: Increased use of tissue expanders, advancement rotational flaps, and hair transplantation has resulted in improved cosmetic outcomes for larger defects of the scalp. Free tissue transfer has provided a revolutionary method of reconstructing subtotal and total defects of the scalp, in particular those associated with neoplasms. SUMMARY: New advances in techniques of scalp reconstruction have provided improved outcomes in terms of cosmetic appearance and decreased morbidity for scalp reconstruction.

Hair↗
PubMed2005

Porous high-density polyethylene for orbital reconstruction.

OBJECTIVE: To determine the safety and efficacy of using porous high-density polyethylene (PHDPE) in the repair of orbital defects. DESIGN: Retrospective case series. SETTING: Academic tertiary care trauma center. Patients One hundred seventy patients with orbital defects requiring surgical repair. Intervention Orbital defect repair with PHDPE. Main Outcome Measure Our review documents surgical results and complications associated with the use of PHDPE. RESULTS: There was a 6.4% complication rate associated with the use of PHDPE. The infection rate was 1.8%. The persistent orbital malposition rate was 3.5%. The extrusion rate was 0%. CONCLUSIONS: This report represents the largest case series in the literature using PHDPE for orbital reconstructions. The use of PHDPE resulted in a low complication rate and excellent functional and cosmetic reconstructive results. Because of our success with the use of PHDPE, we have changed our clinical practice to minimize the use of autologous graft material, thereby eliminating donor site morbidity in cases involving orbital reconstruction.

Biocompatible Materials↗
PubMed2003

Gorham Stout syndrome (disappearing bone disease): two additional case reports and a review of the literature.

Gorham-Stout syndrome, or disappearing bone disease, is characterized by the proliferation of thin-walled vascular channels associated with regional osteolysis. There have been fewer than 150 cases reported in the literature. In this clinical report, we describe 2 additional cases of Gorham-Stout syndrome affecting the maxillofacial skeleton. We provide a review of the clinical diagnosis of this syndrome and describe treatment options.

Biopsy↗
PubMed2002

A child with Saethre-Chotzen syndrome, sensorineural hearing loss, and a TWIST mutation.

OBJECTIVE: Patients with syndromic craniosynostosis may have associated hearing deficits. A review of hearing loss associated with syndromic craniosynostosis as well as implications of cochlear implantation in the craniosynostosis patients is presented. In the literature, patients with Saethre-Chotzen syndrome have been shown to have conductive or mixed hearing losses. This case report describes a patient with Saethre-Chotzen syndrome caused by a mutation in the TWIST gene who exhibits a severe to profound sensorineural hearing loss.

Acrocephalosyndactylia↗
PubMedDate not supplied

Barbed polypropylene sutures for midface elevation: early results.

BACKGROUND: In the past decade, the popularity of minimally invasive procedures for midface rejuvenation has greatly increased. We describe a new technique using percutaneous barbed polypropylene sutures to specifically address midface aging. It can be performed in a closed or open approach, depending on the degree of tissue repositioning required. OBJECTIVE: To determine the efficacy of the barbed polypropylene suture in the elevation of the aging midface and the rate of associated early complications. METHODS: Examination of the results obtained in 44 patients in whom we used the barbed polypropylene suture in a private practice plastic surgery facility. Of these patients, 34 underwent an open-approach and 10 a closed-approach procedure. Attention was focused on improvement of the aging midface, including the infraorbital hollow, lower lid position, nasolabial and melolabial creases, and nasojugal groove. Attention was also focused on improvement of the jowls. RESULTS: All patients demonstrated improvement in the midfacial area and jowls, with minimal complications. CONCLUSION: The suture evaluated in this article provides another technique that can be used by facial plastic surgeons in selected patients to address, in particular, ptosis of the midface.

Equipment Design↗
PubMedDate not supplied

Quantitative assessment of nasal changes after maxillomandibular surgery using a 3-dimensional digital imaging system.

OBJECTIVE: To evaluate nasal changes after maxillomandibular surgery by means of images taken with a 3-dimensional digital camera. DESIGN: Thirty-two patients (26 female and 6 male) with preoperative and postoperative 3-dimensional photographs were studied. The patients underwent maxillary movement with impaction (upward rotation), maxillary movement with lengthening (downward rotation), or maxillary movement without rotation. With the 3-dimensional imaging software, preoperative and postoperative calculations were performed for interalar width, internostril width, nasal tip projection, and columellar length from the 3-dimensional digital images. The nasolabial angle was also measured. RESULTS: Postoperative interalar and internostril widening was significant (P<.05) for all 3 categories of maxillary movement. However, there was no statistically significant change in nasal tip projection and columellar length. Interestingly, movement of the maxilla with upward rotation did show a statistically significant decrease in the nasolabial angle. CONCLUSIONS: Changes to the nose clearly occur after orthognathic surgery. There was a statistically significant increase in postoperative interalar width and internostril width with maxillary movement. However, no clear correlation could be determined between amount of change and maxillary movement. Interestingly, maxillary advancement did not show any significant change in nasal tip projection or columellar length, with data showing both increases and decreases in measurements. The nasolabial angle in patients who underwent maxillary advancement with impaction (upward rotation) was the only measurement that showed a statistically significant increase.

Adolescent↗