Được giới thiệu vào năm 2002, các hệ thống tia laser Fontona một tính năng công nghệ độc quyền VSP (Variable Quảng trường Pulse). Điều này cho phép người học viên để thích ứng với các xung laser thời gian và độ dòng theo | 38 Clinical procedures in laser skin rejuvenation Table Dermatological conditions treatable with the Er YAG laser Becker nevi Trichoepitheliomas Miliary osteomas Compound nevi Sebaceous hyperplasia Papillomas Naevi spili Eruptive hair cysts Café-au-lait spots Verrucae Xanthelasma Syringomas Epidermal nevi Adenoma sebaceum Basal cell carcinoma Xanthelasma Angiofibroma Squamous cell carcinoma Syringomas Hidradenoma Telangiectasia Milia palpebrarum Morbus Favre Racouchot Rhinophyma Seborrhoic keratoses Lentigines Hailey-Hailey disease Darier s disease familial benign pemphigus Variable-pulse Er YAG systems Introduced in 2002 the Fontona laser systems feature a proprietary VSP Variable Square Pulse technology. This allows the practitioner to accommodate the laser pulse duration and its fluence according to the needs of the specific application Fig. . By means of digital online energy regulation the energy of each pulse is actively controlled to match the required value while the laser is in operation. This enables the practitioner to treat selected tissues without heating the surrounding tissue unnecessarily. With a short pulse width the VSP-shaped Er YAG laser induces minimal thermal effects to underlying tissue while rejuvenating the superficial skin layers through ablation of the allows the practitioner to offer effective skin rejuvenation treat ments with higher comfort levels and shorter recovery. By increasing the pulse duration more heat is diffused in the skin and a resulting collateral thermal effect is achieved. Long-pulsed lasers characteristically have pulse durations of the order of milliseconds in contrast to short-pulse durations of the order of microseconds. These thermal effects produce pronounced collagen contraction and new collagen stimulation in the dermis. Clinical trials have proven a light ablative effect on the epidermis relatively noninvasive stimulation of new collagen formation and no post-treatment downtime. Fotona s
