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Introduction: Under the concept of regenerative periodontal therapy, there are two approaches: the first is the passive regeneration conceptthat includes bone substituents and guided periodontal regeneration by using of biomembranes and the second concept of active regeneration that impliesthe use of growth factors. The aim of the passive regeneration, by using of bone matrix (bone substituens) has been stabilization and bone defects management, preventing epithelial tissue growth, as well as saving space for the new tissue regeneration. This concept implies the use of autogenous transplantats, xenografts, allografts, as well as alloplastic materials. The carriers for active tissue regeneration, growth factors -GF are biological mediators that regulate cellular processes and that is crucial for the tissue regeneration. Aim:Presentation ofmodern approaches to periodontal therapy thatare focused on the attachment regeneration and complete reconstruction of periodontal tissue. Conclusion: In the future, periodontal regenerative therapy with periodontalligament progenitor cells should encourage repopulation of the areas that have been affected by periodontal disease.

Introduction: Permanent tooth avulsions (traumatic extraction; total luxation) are one ofthe most severe permanent tooth injuries and can occur as single injuries or associated with other dental injuries or injuries to the face and jaws region. They are defined as the luxation of teeth from the alveoli with complete rupture of periodontal fibres, or with one part attached to the rootcementum and the other to the alveolar bone, thus compromising the dental pulp, root cementum,and alveolar bone. The high prevalence and numerous negative consequences on the stomatognathic systems they have suggest permanent tooth avulsions should be regarded as an important public health problem. The aim: is to point out the therapeutic possibilities of permanent tooth avulsion that can ensure their longer survival in the oral cavity. Conclusion: The treatment strategy for avulsed permanent teeth is always based on limiting root canal infection and periradicular inflammation, shifting the balance from unfavourable (replacement resorption) to favourable (periodontal) healing. The success of therapy and periodontal healing depend on the duration and conditions of extraoral tooth preservation, the degree of damage to the periodontal ligament, and the condition of the pulp.

Appliances that use electromagnetic radiation in the form of high frequency radioablation are increasingly applied in many branches of medicine and in recent times in oral surgery. They work on the same principle as the electrocauteries, with the difference that the electrocauteries use wave frequencies from 300kHz to 500kHz and the radiolayers use the frequency of wavelengths of 4MHz. This allows them a far lower energy penetration depth, less destruction and limited lateral tissue damage, without burning effect. Wound healing is faster, scarring is less, and cosmetic effect is more pronounced. During one year at the Department of Oral Surgery, a radiotherapeutic appliance is used in many oral surgery interventions. Treatment of non-contact tissues simultaneously with a hemostatic effect or pure coagulation is performed very easily and successfully. The appliance is tested when working on soft tissue of the skin and mucous membranes. With proper and professional handling any adverse effects are avoided. Special attention should be paid to patients with cardiac pacemaker and adhere to the protocol. It patient has dental implants, touching them is contraindicated while working with active electrode. Conclusion: The radiowave surgery has advantages in relation to conventional surgery wiht respect on indication areas.