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Biomedical subjects

L J Singer

Publications and source records attributed to L J Singer.

15 recordsLinked to original sources

A controlled evaluation of dermabrasion versus CO2 laser resurfacing for the treatment of perioral wrinkles.

Facial skin treatments with laser resurfacing, dermabrasion, and chemical peels were responsible for a significant portion of the 2.7 million cosmetic procedures performed in 1998. Perioral wrinkles are a common problem for which plastic surgical consultation is obtained. The aim of this study was to compare and quantify the advantages and disadvantages of laser resurfacing versus dermabrasion in the treatment of perioral wrinkles. Twenty female patients provided informed consent and participated in the study. Half of the perioral area was treated with dermabrasion and half was treated with the UltraPulse CO2 laser. The two procedures were compared using high-quality photographs; a biophysical evaluation of skin color, hydration, and mechanical properties; and patient evaluation of outcomes. Photographs were evaluated by 10 board-certified plastic surgeons who were blinded to the treatment methods. The laser treatment had a significantly higher erythema score at 1 month and a small but significantly greater improvement in perioral wrinkles at 6 months. Thirteen subjects selected the laser treatment as producing the best result, despite the greater intraoperative pain for this procedure. Biomechanical measurements suggest that the laser treatment produced a skin state more similar to skin in younger patients, presumably with higher levels and/or greater organization of the collagen and elastin. Patient preference was inferred from the resurfacing method that they would recommend to a friend. Although the laser was selected as the best result in a majority of cases, patient preference was equally distributed between the two treatments. The authors think that by studying and quantifying the biophysical changes that occur as a result of CO2 laser resurfacing, greater improvements in restoring actinic damage (e.g., wrinkles) can be achieved. Patients consider more than the objective skin changes from a resurfacing technique when making a recommendation to a friend.

Adult↗

Zinc responsive dermatopathy in goats: two field cases.

Two adult female goats presented with symmetrical alopecia, rough hair coats, weight loss, and generalized unthriftiness. In light of the history and clinical signs, we suspected a mineral deficiency or endocrine imbalance. These animals were being fed a diet of alfalfa, a legume high in calcium, which can block zinc uptake. Serum zinc levels were low, and skin biopsies supported the diagnosis of zinc deficiency. Therefore, these findings suggest that the main factor blocking zinc absorption was increased dietary calcium.

Alopecia↗

Evidence-based dental plans: dentistry's future is now.

Evidence-based dental practice is defined in terms of systematically collected and analyzed data on treatment outcome. By making this the common ground among dentists, patients, insurers, and others, it is possible to improve both the effectiveness and cost-efficiency of oral health care.

Delivery of Health Care↗

Delegating duties.

Explore the source record for details and available documents.

Cracked Tooth Syndrome↗