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Biomedical subjects

Steven H Dayan

Publications and source records attributed to Steven H Dayan.

15 recordsLinked to original sources
PubMed2005

Complications of botulinum toxin A use in facial rejuvenation.

The esthetic application of botulinum toxin type A (Botox) is a safe treatment modality; nevertheless complications can occur as a result of patient-and physician-related factors. Fortunately, adverse effects and undesirable sequelae after Botox injections are temporary. Complications may be more serious in patients who have more severe rhytids (which require more Botox), previous facial plastic surgery (altered anatomy), and those who have pre-existing neuromuscular disease. The physician can reduce complications by using proper injection techniques, appropriate regional Botox dosing, and by being conservative in the overall approach to Botox-mediated facial rejuvenation.

Botulinum Toxins, Type A↗
PubMed2005

Pitfalls of photography for facial resurfacing and rejuvenation procedures.

Photography's role in documenting changes after aesthetic surgical procedures is well established. Facial resurfacing procedures usually cause subtle changes in skin topography. Capturing these objective photographic differences necessitates an understanding of basic photographic principles pertinent to accurately documenting photographic changes. Variables examined include lighting, exposure, aperture, camera type, white balance, lens focal length, and patient positioning. A set of suggested guidelines for accomplishing these goals is given for the facial plastic surgeon.

Cosmetic Techniques↗
PubMed2004

Superficial skin resurfacing.

Options for both the cosmetic surgeon offering and patients seeking treatment for cutaneous aging have expanded greatly in recent years and continue to grow. Increasingly sophisticated aesthetic patients are seeking procedures to rejuvenate in record numbers,but many are unwilling to tolerate a large amount of downtime. In expert hands, ablative laser resurfacing has a long history of dramatic results for the treatment of cutaneous aging. During the last decade, there have been a growing number of reports of modalities targeting the more superficial skin structure. Such modalities offer more modest results without the downtime associated with more aggressively ablative procedures. These resurfacing techniques include the use of mechanical, chemical, and thermal forces.

Adult↗
PubMed2004

Facial rejuvenation using botulinum toxin A: review and updates.

The aesthetic applications of botulinum toxin A (Botox) are well known to certain medical and nonmedical communities. This nonsurgical rejuvenation modality continues to be in high demand in part because of the immediacy of its effects, its high safety profile, and its no-downtime recovery period. The physician interested in using Botox for facial rejuvenation needs to have a working knowledge of facial anatomy and botulinum toxin pharmacology and clinical experience with Botox injections.

Botulinum Toxins, Type A↗
PubMed2004

Nonablative resurfacing.

In expert hands, ablative laser resurfacing has a long history of excellent results in the treatment of photodamage-induced rhytids, depressed acne scars, and other signs of cutaneous aging. Over the last decade there have been a growing number of reports in the emerging area of nonablative resurfacing. Nonablative modalities provide less impressive clinical results for rhytid reduction but have shown particular promise for the treatment of scars and superficial dyschromias. It is also ideally suited for those patients seeking a minimally invasive, greatly reduced downtime procedure.

Humans↗
PubMed2004

Use of the KTP laser in the treatment of rosacea and solar lentigines.

Numerous techniques have evolved in facial plastic surgery to treat rosacea and solar lentigines. The treatment regimens range from avoidance of causative factors to the use of topical agents or other modalities that target the superficial layers of the skin. Of the modalities that target the epidermis, lasers offer the physician and patient the ability to target specific chromophores in the skin. Advances in laser technology led to the implementation of targeting certain characteristic pigments of abnormal areas with minimal damage to surrounding normal tissue. Rosacea and solar lentigines have characteristic cells that are targeted by a potassium-titanyl-phosphate (KTP) laser. The lesions are different in their origins but share the ability to be treated successfully with the KTP laser. A review of both conditions and other treatment options is discussed.

Facial Dermatoses↗
PubMed2003

Complications of botulinum toxin A use in facial rejuvenation.

The esthetic application of botulinum toxin type A is a safe treatment modality; nevertheless, complications can occur as a result of patient- and physician-related factors. Fortunately, adverse effects and undesirable sequelae after Botox injections are temporary. Complications may be more serious in patients who have more severe rhytids (which require more Botox), have undergone previous facial plastic surgery (altered anatomy), and those who have preexisting neuromuscular disease. The physician can reduce complications by using proper injection techniques, appropriate regional Botox dosing, and by being conservative in the overall approach to Botox-mediated facial rejuvenation.

Botulinum Toxins, Type A↗
PubMedDate not supplied

Nonablative laser resurfacing using the long-pulse (1064-nm) Nd:YAG laser.

BACKGROUND: Lasers with infrared wavelength ranges have been used in nonablative rejuvenation of skin. In this process, cooling of the epidermis allows for laser energy heat-induced injury to the dermis without ablation of the epidermal layer. This dermal injury is theorized to produce improvements in skin quality. In addition, long-pulse Nd:YAG lasers target melanin less efficiently, allowing safer treatment of patients with all skin types. In this study, we evaluate the use of the 1064-nm Nd:YAG laser for the purpose of rejuvenating the aging face. MATERIALS AND METHODS: Fifty-one patients were enrolled in the study. Patients with Fitzpatrick skin types I through V were included. Standard photographs were taken before the first and after the last treatment. The Nd:YAG laser treatments were initiated with a chilled tip-cooling device. At each treatment session, patients were given self-assessment questionnaires. At completion of the study, 3 physicians performed masked evaluations of patient pretreatment and posttreatment photographs. RESULTS: Thirty-four of 51 patients completed at least 7 treatments, had posttreatment photographs, and were entered into the study. Follow-up ranged from 1 to 6 months. No adverse events were noted. Masked analysis and patient subjective scores demonstrated a subtle improvement in several skin variables. Patient-assigned Fitzpatrick Scale scores declined after 6 treatments for coarse wrinkles (-22.3%; P<.01), skin laxity (-36.3%; P<.01), and overall improvement (-40.6%; P<.01). Physician-graded scores demonstrated decreases in coarse wrinkles (-11.9%; P<.01), skin laxity (-17.3%; P<.01), and overall improvement (-20.0%; P<.01). CONCLUSIONS: Nonablative resurfacing techniques are well suited for patients requesting rejuvenating treatments of the aging face with minimal downtime. Although improvements in photodamaged skin are subtle and gradual, the 1064-nm Nd:YAG laser was well tolerated by patients of all skin types.

Adult↗
PubMedDate not supplied

Botulinum toxin type a in the treatment of dermatochalasis: an open-label, randomized, dose-comparison study.

OBJECTIVE: To compare the efficacy and safety of 2 doses of botulinum toxin type A in the treatment of dermatochalasis. METHODS: Forty patients with mild to moderate dermatochalasis were randomly assigned to receive 1 of 2 doses of botulinum toxin type A in the lateral infrabrow--4 U/brow or 6 U/brow--and followed up for 20 weeks. RESULTS: Investigator assessment showed the proportion of responders (> or = 1 grade improvement in severity of dermatochalasis on a scale of none, mild, moderate, or severe) at week 2 was 32% with 4 U and 47% with 6 U. Compared with the lower dose group, the higher dose group also reported a greater degree of improvement, significantly higher ratings for feelings of attractiveness and feelings of satisfaction with appearance, and a higher incidence of satisfaction. CONCLUSION: Single-site injection of botulinum toxin type A in the lateral infrabrow can offer effective treatment for mild to moderate upper eyelid dermatochalasis.

Botulinum Toxins, Type A↗