In Vivo Evaluation of Teeth Shade Match Capabilities of a Dental Intraoral Scanner.

Intraoral scanners were introduced in order to increase patient comfort and improve dentist lab communication. Acquiring optical impressions of the prepared teeth eliminates the need for conventional impression procedures and improves patient comfort. Intraoral scanner software offers since 2017, color shade determination, by analyzing the tooth shade of the obtained 3D model. In this study we tested the accuracy of an intraoral scanner color selection capabilities compared with a dental spectrophotometer, considered as reference. Statistical differences were found between the two system tested when the results were expressed in both Vita Classical and Vita 3D Master shade tabs codification.

Oral manifestations in Apert syndrome: case presentation and a brief review of the literature.

BACKGROUND: The present paper describes the oral manifestations in a 16-year-old boy previously diagnosed with Apert syndrome. PATIENT AND METHODS: The extraoral and intraoral pathological findings were recorded. The following intraoral parameters were recorded: plaque and calculus deposits, dental caries, periodontal status, malpositions, and occlusion. For the upper anterior teeth, dental shade was recorded, using a dental spectrophotometer. The corresponding diagnostics were established. A treatment plan was established and discussed with the child's parents. RESULTS: The dysmorphic characters were obvious, including acrocephaly, prominent forehead, hypoplastic midface, hypertelorism, short nose. The intraoral features revealed a bifid uvula and Byzantine-arch palate associated with lateral swellings of the palatine processes, one on either side of the middle miming a pseudocleft in the midline. Heavy dental plaque, dental calculus, congestion and swelling of the gingiva and periodontal pseudopockets associated with anterior teeth were recorded. Dental caries on anterior and posterior teeth were present. Severe maxillary dental crowding associated with the rotation of central incisors and the palatal position of second bicuspids and the malposition of the mandibular anterior teeth were observed. No intrinsic discoloration of the dental structure was recorded. Severe anterior and posterior open bite and crossbite were observed. Other signs were represented by syndactyly involving partial fusion of the fingers and toes. Also, mild mental deficiency was recorded. CONCLUSIONS: The information and the strong motivation of the parents regarding the necessity of the treatment and the extensive use of home prevention methods are essential to control oral conditions in these patients.

In vitro testing of an experimental dental composite resin and adhesive system.

UNLABELLED: In vitro testing of new experimental materials has been introduced for many years as a method to evaluate them in simulated conditions, before the clinical trials. Our study has investigated a new experimental composite resin C1 and adhesive system Ad1 by scanning electron microscope (SEM) studies and microleakage tests. MATERIALS AND METHODS: Both in vitro test were performed on extracted human teeth, that were prepared for standardized class II and V restorations and restored with three composite resins (experimental C1, TetricCeram TC and Solitaire2 S2) and their total-etch adhesive systems (Ad1, Excite EX and GlumaOneBond GB). Teeth were sectioned and investigated under the SEM microscope for the interfaces created and under the optical microscope for dye penetration and microleakage. RESULTS: The Romanian experimental composite C1 has shown lower alpha "ideal" interfaces than TC and S2, with no significant difference between the latter. Microleakage was significantly lower at the enamel margin and significantly higher at the gingival margin placed below the CEJ for all three compared composites. C1 presented similar dye penetration scores with the commercial available systems. DISCUSSION: The differences in SEM analysis can be attributed to higher viscosity and handling properties in the experimental adhesive Adl and to technique sensitivity. CONCLUSIONS: Further investigation is required to obtain better working properties for the experimental adhesive and higher "ideal" scores at the interfaces. Also the SEM investigation is more sensitive than the optical microscope analysis.