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ePaper created 2017-10-26, 15:28:59 | version 1.38.0
| overview Fig. 1: Absorption of the different laser types. Fig. 1 resistance to dissolution. Therefore, alongside sur- gery, 445 nm has been proven a potent and efficient wavelength when dealing with restorative materials. is a strong, valid way for dentine hypersensitivity’s management. The “soft” red Dentine hypersensitivity Dentine is a difficult and demanding dental tissue, presenting certain difficulties in its management due to its composite structure character. Alongside this fact, certain clinical entities related to dentine mor- phology, structure and interrelation with other oral tissues such as the gingiva are the root of difficult to solve clinical problems. One of the major challenges in contemporary re- storative dentistry is managing dentine hypersensi- tivity. Dentine hypersensitivity is a multifactorial clinical situation that affects a significant number of patients in almost all age groups. A variety of different treatment modalities have been suggested, starting from toothpastes and varnishes, going up to restor- ative procedures. Dentine disinfection Following caries excavation, a dental practitioner is faced with dentinal walls still contaminated with remaining bacteria either in a “soft” layer of carious dentine or existing infiltrated inside dentinal tubuli. Light-activated disinfection (LAD) or photo-activated disinfection (PAD) are different names for the same procedure. The foundations of this approach refer to the use of a red laser in conjunction with a blue dye (e.g. toluidine blue or methylene blue). In principle, the red light activates the dye in order to produce free oxygen radicals, a very potent disin- fectant that would disinfect dentinal walls without affecting pulp’s vitality or interfering with adhesive procedures and bond strength of contemporary bonding systems and materials. The same method is also being suggested for periodontal pockets and root canal disinfections following similar proce- dures (Fig. 2). Low Level Laser Therapy (LLLT) seems to be a key way to manage these problems, especially in cases where there is no space available for the placement of “per- manent” coverings. Patients are coming in, exhibiting different pain levels when thermal stimuli are applied, in particular cold ones. Subsequently, the red light “soft” laser can be use- ful in a variety of restorative cases providing either immediate pain relief in some difficult cases, or a safe environment for our restorative materials to function, providing extended longevity of resto- rations. The application of a “soft” laser (0.2 to 0.5 W, cw) for one to two minutes at the cervical area of each tooth provides an effective treatment in most cases. Certainly, because of the multifactorial character of the problem, there are cases that perhaps would respond positively on a different approach. But laser The “diode laser” Diode laser devices at 810, 940 and 980 nm can be also referred to as the “standard” diode devices found in almost every laser equipped dental clinic. These wavelengths are the most common wavelengths 08 laser 3 2017