objectives: scaling and root planing (srp) is one of the most commonly used procedures during periodontal treatment. the aim of this study was to evaluate the root surface roughness after srp with erbium: yttrium aluminum garnet (er:yag) laser compared to ultrasonic and hand instruments.   materials and methods: in this experimental study, 56 extracted sound single-rooted teeth with moderate le...

introduction: pulsed dye laser (pdl) has been used to treat acne lesions and scar erythema by interrupting superficial vasculature. salicylic acid chemical peels are employed chiefly due to their lipophilic, comedolytic, and anti-inflammatory properties. although studies have looked at peels and laser therapy independently in acne management, we examined these treatments in combination. our pri...

introduction: pyogenic granuloma (pg) is a common tumor-like growth of the oral cavity, considered to be of non-neoplastic nature, often caused by constant low-grade trauma as well as poor oral hygiene and maybe due to hormonal disturbances. surgical excision, and removal of underlying cause in some cases, is the preferred method of treatment as it is only a benign lesion. in order to remove th...

introduction: the purpose of a desensitizing agent is a permanent coating or filling of dentin surface. morphological analysis in vitro of this treated surface is essential to understand the interaction between desensitizing agent and hypersensitive dentin. the aim was to evaluate the morphology of four dentin surface treated with desensitizing agents. methods: this was an in vitro laboratory s...

Laser and laser-like assisted facial rejuvenation has become very popular during the last decade. Although a myriad of techniques are available, such approaches can be divided into four basic approaches. There are those that (i) ablate the epidermis, cause dermal wounding, and provide a significant thermal effect (CO(2) lasers); (ii) ablate the epidermis, cause dermal wounding, and minimal ther...

In this thesis work, we characterize lasers based on self-organized In(Ga)As quantum dots (QDs). Intrinsic static and dynamic lasing properties of QD lasers are surveyed in high performance devices with a variety of device geometry, cavity loss and QD gain system. At first, the carrier and gain processes are analyzed that affect the temperature dependence of QD lasers. The characteristic temper...

Lasers range from those activated by natural gases, elements, molecules or man-made crystals to those that measure distance to the moon, create laser-guided warfare and record the price of our own groceries. Over the past several years one has seen a strong emergence of lasers in the field of dentistry. Lasers are not, however, new to the field as some of the in vitro studies report back to 196...

peri-implantitis is a state defined as an inflammatory reaction around osseointegrated implants, leading to progressive loss of supporting bone. various treatment methods are suggested in the treatment of peri-implantitis and clinicians have to choose a method over a large number of treatment protocols. lasers have shown promising therapeutic effect in treatment of peri-implantitis. however, so...

Introduction Optical fibers and fiber amplifiers have sparked an unparalleled growth in telecommunications and what is being recognized as a revolution in Optics. In fact, with the fine work by others on high repetition rate ultrafast fiber lasers, it is possible that these devices will also be an important factor in the telecommunications arena. However, what will be the impact of optical fibe...

Strong Optical Injection Locking of Edge-Emitting Lasers and Its Applications by Hyuk-Kee Sung Doctor of Philosophy in Engineering Electrical Engineering and Computer Sciences University of California, Berkeley Professor Ming C. Wu, Chair Semiconductor lasers are essential components that enable high-speed long-haul communication and have been widely used for various applications in photonics t...