Ozone appears as effective and biocompatible cavity disinfectant in treatment of deep carious lesions by incomplete caries removal technique.

The anterior and middle superior alveolar nerve block may be recommended if maxillary permanent premolars have to be extracted.

Summary Introduction Tooth and other oral tissue damage can occur at any time of life. Traumatic extraction is a complex traumatic injury characterized by complete dislodgement of the tooth from its alveolus. The diagnosis of traumatically injured teeth includes X-rays and a detailed clinical examination. Case report A twelve-year-old boy reported at the dental clinic of the Faculty of Medicine due to the injury in the anterior maxillary region. It was a sport injury. The time elapsed since the accident was 2 hours and 20 minutes. According to the clinical examination and X-rays the diagnosis was: The teeth 11 and 21 – Complete traumatic dental avulsion and fracture; 22-Hypodontia and chin contusion and laceration. The teeth were brought in physiological solution. After applying local anesthetic, soft tissue was cleaned, the teeth positioned back in their alveoli and an immobilizing splint of fiberglass fibers placed. The patient was administered antibiotics and recommended tetanus prophylaxis. Seven days after the injury, teeth were treated endodontically. After one month, the immobilizing splint was removed. The tooth 21 was definitely obturated and composite buildups were done on both teeth. Calcium hydroxide dressing was left in the canal of the tooth 11. One month and 3 weeks after the injury, a fistula appeared above the tooth 11, and the treatment was finally completed after seven months. Conclusion Traumatic tooth injuries, of any kind, require urgent treatment as time loss usually reduces chances for successful treatment. One year after the injury, the patient had no symptoms and the result was functional and aesthetically acceptable.

Introduction. Success in endodontic treatment depends upon the clinician's knowledge and ability to recognize and diagnose the presence of anatomical and morphological variations of the root and canal system. Mandibular canines are usually recognized as having one root and one root canal. In spite of the low incidence of mandibular canines with one root and two canals, their appearance should not be neglected due to the fact that the presence of a second canal in these teeth leads to difficulties in endodontic treatment. The aim of this case report is to describe mandibular canine with two root canals. Case presentation. 45-year-old patient presented for medical care due to the pain in a lower right canine. Clinical and radiographic examination revealed composite filling and caries with periapical radiolucent area and sensitivity to percussion in the mandibular right canine. By careful evaluation of the diagnostic radiology, it was observed that the mandibular canine had two canals. The patient was diagnosed with acute apical periodontitis and root canal therapy was given following the standard protocols. Conclusion. Although the prevalence of two canals in mandibular canine is low, the clinician should always be mindful of variations in the number of canals for appropriate therapeutic management.