Smile analysis: The buccal corridor | [Valutazione del corridoio vestibolare nell'analisi del sorriso]

Abstract In questa analisi del sorriso si è preso in esame il corridoio vestibolare per valutare e quantificare con metodo scientifico la sua presenza e metterla in correlazione con altre strutture. Obiettivo del lavoro è analizzare i rapporti tra porzione più vestibolare del canino e rima labiale; presenza del corridoio vestibolare, distanza tra la linea mediana incisiva e la rima labiale. È stata effettuata un’analisi statistica dei dati raccolti in un campione di 79 soggetti tra 20 e 25 anni. È risultato negativo il Coefficiente di correlazione di Pearson per la correlazione tra: 1) canino rima labiale - corridoio vestibolare, 2) distanza del piano occlusale dell’incisivo laterale dal piano occlusale dell’incisivo centrale - corridoio vestibolare, 3) corridoio vestibolare - distanza tra la linea mediana e la rima labiale. Si può quindi concludere che sia la distanza dal canino alla rima labiale sia il corridoio vestibolare sono da ritenersi una pura sensazione clinica

Aesthetical standards and new technologies: a comparison

Aim: The aim of this work is to evaluate whether some facial components have a stronger impact than others on the perception of beauty and to determine whether classical aesthetical standards are still valid for the current face types. Methods and materials: 58 students aged 18-30 years, 32 male and 26 female were analized. Face photos in a rest position were loaded on “Point.tool” software and some facial landmarks were loaded on “Venus” software to simulate aesthetical improvements. The square Pöch-Perseo mesh was used to develop our own mesh and each face was associated with a reference geometrical shape and a mesh. We carried out a quantitative and a qualitative evaluation of the face after and before the improvement of 75%. The data was subdivided into four categories. Statistical analyses: “Kolmogorov-Smirnov”, “Kruskal-Wallis” and “ManWhitney U” tests were used. Data distribution in each group is not standard. There is a statistically significant difference in the four categories in each group. Result: There are no facial components having a stronger impact on the beauty and attractiveness of a face. No geometrical shape prevails in our sample, although the oval shape is more represented than the others. Conclusion: Classical beauty norms (oval shaped) can no longer be the only appropriate aesthetical reference for the variety of face types we examine in our daily practice

Effect of post-cure heating on the flexural strength of two indirect resin composites

The aim of this study was to evaluate whether a post-cure heat-treatment may improve the flexural strength of two indirect resin-based composites. Tested factors were: material (Gradia Indirect, Gradia Forte), mass (opaqus dentin, dentin, enamel) and curing mode (light, light and heat). A three-point bending test appliance was developed according to ISO 4049/2000. Three-Way ANOVA and 2-Pameter Weibull cumulative distribution function were performed. Factors material and curing mode were significant (p < 0.001), while the mass type was not (p = 0.181). A post-cure heat treatment may be useful for enhancing the flexural strength of both materials

Simplified edentulous treatment: A multicenter randomized controlled trial to evaluate the timing and clinical outcomes of the technique

Statement of problem The time and cost of conventional complete denture procedures have been questioned in favor of simplified and faster methods. Whether the simplified edentulous treatment (SET) method yields complete dentures with acceptable outcomes is unclear. Purpose The purpose of this randomized clinical trial (RCT) was to evaluate the outcomes of 2 techniques in providing complete dentures: the conventional and the SET methods. Material and methods Three Italian academic institutions participated in this single-blind parallel RCT. In total, 64 participants were selected and agreed to join the study. They were allocated randomly to 1 of 2 treatment groups, the conventional and SET group: 32 participants per group, 50% women in each group. Treatment was provided by final year predoctoral dental students. The time required for the clinical and laboratory procedures, the number of clinical sessions, and the laboratory returns were recorded. The clinical quality of the dentures and participant satisfaction were evaluated using questionnaires. Differences between treatment group outcomes were analyzed with 2-tailed independent sample Student t tests for clinical and technical timing and clinical and technical steps and Mann-Whitney U tests for denture quality and participant satisfaction (α=.05). Results The clinical time required (−34%, P&lt;.001), number of clinical sessions (−34%, P&lt;.001), and laboratory returns (−46.5%, P&lt;.001) were significantly lower for the SET than for the conventional method. The laboratory time required (−10.6%) was not significantly less with the SET method (P=.06). Participant satisfaction (P=.816) and prosthodontist ratings of denture quality (P=.539) were comparable between the groups. The participants appreciated the reduced number of clinical sessions with SET (P=.003). Conclusions Simplified edentulous treatment may be considered a reliable method for providing complete dentures in a shorter timeframe while maintaining denture quality and patient satisfaction. © 2017 Editorial Council for the Journal of Prosthetic Dentistr