In spite of high mechanical strength, zirconia-based ceramics (ZrO 2 ) has poor bond strength after conventional bond cementation procedures, requiring different surface treatment methods (STMs). This review gathered information about the STM for adhesive cementation (AC) to ZrO 2 in the PubMed database, considering in vitro studies pertaining to AC for acid-resistant ceramics (ZrO 2 ) limited to peer-reviewed papers published in English between 1965 and 2013 in dental journals. Different STMs have been proposed for ZrO 2 : air-abrasion (laboratory or chairside) with silica-(Si-) coated aluminum particles, the use of materials containing phosphate monomers, primer or silane application, laser irradiation, Si vapor phase deposition, and selective infiltration etching. In conclusion, STMs improve bond strength of resin luting cement to ZrO 2 mainly when tested in short time. STMs must be correlated to the type of ZrO 2 and the resin cement.

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Displacement of the non-reduction disk with limitation of opening (DDwLO) can be treatment of the non-surgical form. However, it required scientific and clinic knowledge of diagnostic area of the disorders temporomandibulares. This study was performed with the patient CN, 18 years, white, female, who went to the orofacial pain ambulatory with complaints of extreme pain on the right temporomandibular joint (TMJ) and limitation of maximum opening of 29 mm with shift to right, which she has been suffering for at least three years. After a criterion anamnese the diagnosis hypothesis found was a displacement of the non-reduction disk with limitation of opening. The treatment was based on infiltration in the right TMJ with anesthesic followed by mandibular manipulation. After the therapeutic conduct the patient presented clinical signals of normality with absence of trismus and mandibular movement without shift to right. The patient was followed up during five years not presenting return of the pathology.

Currently, there is a constant search for new chemical compounds through plant extracts and phytochemical compounds that do not cause so many side effects in the oral cavity and that have good antimicrobial properties. Therefore, the present study evaluated the synergistic antimicrobial efficacy of mouthwashes containing thymol and carvacrol when compared with 0.12% chlorhexidine mouthwash after bilateral lower third molar extraction. Nineteen healthy (male and female) patients (n = 19) aged between 18 and 30 years, of both sexes, treated at the Faculty of Dentistry of Mato Grosso do Sul (UFMS, MS, Brazil) participated in this study. All patients were submitted to two different therapeutic treatments, divided into two groups: group 1 (control) - patient used 0.12% chlorhexidine mouthwash solution; group 2 (experimental) - patient used 0.05% thymol and 0.025% carvacrol solutions. The suture was removed at seven postoperative days and aseptically transferred to a tube containing sterile potassium buffer saline solution. Samples were submitted to microbiological analysis at the Microbiology Laboratory at UFMS. The mean and standard deviation of colony forming units/ml of isolate microorganisms in the suture grown in BHI agar obtained from the control and experimental groups were 4.766 x 106 ± 4.069 and 4.847 x 106 ± 3.971, respectively. In conclusion, the thymol and carvacrol based mouthwash showed antimicrobial effectivity in biofilm adherence of the silk thread after extraction of third molars.