Smile Research Articles

Beautifully crafted smile solutions

Beautifully crafted smile solutions

Relation between Smiling and Play in 1 to 2-year-olds

Relation between Smiling and Play in 1 to 2-year-olds

Dementia's Not Funny, but You Can Smile

Dementia's Not Funny, but You Can Smile

‘Walk slowly among your people and smile’

‘Walk slowly among your people and smile’

QUANTATIVE EVALUATION OF THE EFFICIENCY OF FACIAL BIO-POTENTIAL SIGNALS BASED ON FOREHEAD THREE-CHANNEL ELECTRODE PLACEMENT FOR FACIAL GESTURE RECOGNITION APPLICABLE IN A HUMAN-MACHINE INTERFACE

Introduction: Today, facial bio-potential signals are employed in many human-machine interface applications for enhancing and empowering the rehabilitation process. The main point to achieve that goal is to record appropriate bioelectric signals from the human face by placing and configuring electrodes over it in the right way. In this paper, heuristic geometrical position and configuration of the electrodes has been proposed for improving the quality of the acquired signals and consequently enhancing the performance of the facial gesture classifier. Materials and Methods: Investigation and evaluation of the electrodes' proper geometrical position and configuration can be performed using two methods: clinical and modeling. In the clinical method, the electrodes are placed in predefined positions and the elicited signals from them are then processed. The performance of the method is evaluated based on the results obtained. On the other hand, in the modeling approach, the quality of the recorded signals and their information content are evaluated only by modeling and simulation. In this paper, both methods have been utilized together. First, suitable electrode positions and configuration were proposed and evaluated by modeling and simulation. Then, the experiment was performed with a predefined protocol on 7 healthy subjects to validate the simulation results. Here, the recorded signals were passed through parallel butterworth filter banks to obtain facial EMG, EOG and EEG signals and the RMS features of each 256 msec time slot were extracted. By using the power of Subtractive Fuzzy C-Mean (SFCM), 8 different facial gestures (including smiling, frowning, pulling up left and right lip corners, left/right/up and down movements of the eyes) were discriminated. Results: According to the three-channel electrode configuration derived from modeling of the dipoles effects on the surface electrodes and by employing the SFCM classifier, an average 94.5% discrimination ratio was obtained. The results can validate our hypothesis and the simulation results too. Discussion and Conclusion: Based on the obtained results, it is clear that our proposed electrode configuration and placement is an efficient method which can be used for further applications such as designing and implementing a robust human-machine interface.

Odontopediatria social: resultados de um ano do projeto Sorria Bairro-Escola nas creches públicas de Nova Iguaçu

The prevention and promotion of oral healthcare programs for babies and pre-school children are still modest. The aim of this article is to present the initial results of the Smile Neighborhood-School project as a proposal of basic care in social Pediatric Dentistry. The parameters used in this research followed the criteria recommended by WHO. The epidemiological surveys were carried out in July 2007 and one year after the start of work, when it was observed that the component “c” had declined from 90.4% to 2.1%, the component “e” decreased from 8.2% to 7.6% and that the component “o” had advanced 1.4% to 90.3%. The project proves to be applicable for simplicity and economy of procedures, and efficient thanks to relevant results achieved quickly.

Cirugía de correción de márgenes gingivales como tratamiento estético periodontal

Aesthetic dentistry is a multidisciplinary component of total facial aesthetics and create an optimal smile requires the integration of all disciplines in dentistry. In any restorative treatment plan should be considered periodontal health and appearance. That is, they must assess the demands of the periodontal tissues in order to achieve lasting results. For the dentist, periodontal health and periodontal aesthetic criteria of fundamental importance to dentistry. Most dental procedures performed, have a direct or indirect effect on increasing the aesthetic dentofacial the smile of gingiva, marginal rim discrepancy and lack of taste, are some ugly situations periodontal that people typically want to improve and cosmetic gingival contouring may be the procedure to provide harmony to the smile. In some of these situations, the altered position of the teeth, it is preferable to correct the cosmetic problem, but in other patients these alterations must be made with gum surgery and optimal treatment plan to further improve the aesthetic appearance of tooth.

Homosexuality, AIDS and Representation in Jarman's Modern Nature and Smiling in Slow Motion

Homosexuality, AIDS and Representation in Jarman's Modern Nature and Smiling in Slow Motion

Finding out what makes you smile

Finding out what makes you smile

Intruding upper incisors using mini-screw anchorage in patients with gummy smile

To evaluate the effectiveness of mini-screw anchorage on intruding upper incisors in patients with gummy smile. Sixteen female patients (mean age: 23.8 years) were involved in this study. The mini-screws were placed between upper lateral incisors and canines on both sides for intruding upper incisors together with fixed appliance. The cephalometric analysis was carried out. Totally 63 teeth in 16 patients were intruded successfully and the deep overbite was decreased by (2.74 +/- 2.00) mm (P < 0.001). The distance from the edge of the upper incisor to palatal plane was reduced by (5.00 +/- 2.76) mm (P < 0.001), and the incisors were proclined by (9.34 +/- 10.06) degrees (P < 0.01). The duration for intrusion was 10.8 months on average. It was practicable and effective to improve gummy smile by intruding upper incisors with mini-screw implant.

Study on quality assurance system of grade 3 laminar operation room

Objective To explore the features of the cleanliness change with time during the use of laminar operating rooms in order to establish reliable quality assurance system. Methods Two grade 3 lami-nar operation rooms were chosen to be tested after one and a half year and two and a half years, laser counter was used to detect the static particulates after cleaning for 30 minutes and 45 minutes. Results After the laminar operation room was used for one and a half years the amount of 0.5 μm particulates in indoor air was less than 350 per liter, and after two and a half years it's above 350 per liter after cleaning for 30 minutes, an obvious difference than the previous one. The anaount of 1 μm and 2 pan particulates also increase obviously, but ff cleaning for 45 minutes the amount of 0.5 μm particulates in indoor air will fulfill the qualification. Al-though the amount of 0.5 μm, 1 pan and 2 μm particulates after 2 years using was higher than the one and a half yesrs'using after cleaning for 45 minutes, but the difference had no statistic meaning. Condusions The elesnliness of laminar operation rooms will drop as time prolonged, Amount of particulates in indoor air will in-crease too but the cleanliness can be ensured by extending cleaning time. After the quality assurance sys-tem was established the amount of smile particulates is still within the standard level Key words: laminar operation room; Quality; Mmanagement;

Influence of sex on the perception of oral and smile esthetics with different gingival display and incisal plane inclination.

This study was designed to determine the esthetic perception of men and women to variations in upper and lower gingival display at smile and speech and to incisal plane tilting. Composed photographs of smile and speech with varying amounts of gingival exposure of the upper and lower teeth and gingiva at smile and at speech and with varying degrees of incisal plane tilting were rated for attractiveness by two groups of lay people. The images were presented as male or female images. A total of 300 questionnaires, including 7500 images, were evaluated by 100 subjects. The results showed that images were scored as less attractive as the amount of upper and lower gingival display was increased during smile and speech. The amount of gingival exposure graded in the esthetic range was up to one mm for the upper incisors and zero mm for the lower incisors. Incisal plane tilting was graded as unesthetic when above two degrees of deviation from the horizontal. Male and female evaluators scored images differently with upper gingival exposure. Female evaluators gave statistically significant higher scores than male evaluators to upper gingival exposure images at smile and speech of both males and females, suggesting that females are more tolerant of upper gingival exposure. Images were scored differently when presented as male or female images. Female images were scored lower by both male and female evaluators, suggesting that additional efforts should be taken in female patients to achieve an esthetic result.

Extraction vs nonextraction: arch widths and smile esthetics.

Dental casts of 30 patients treated with extraction and 30 patients without extraction of four first premolars were randomly selected to determine changes in arch width as a result of treatment. Arch widths were measured from the cusp tips of the canines, premolars, and molars. Posttreatment arch widths were also measured in the midline at a constant arch depth from the most labial surfaces of the incisors. Standardized frontal photographs of the face taken during smiling of 12 extraction- and 12 nonextraction-treated subjects were evaluated. Fifty laypersons judged the esthetics of the smiles. Intercanine width increased less than one mm in both groups, and there was no difference between the two groups. The interpremolar and intermolar distance in both arches decreased significantly from 0.53 to 0.95 mm in the extraction sample, whereas the interpremolar and intermolar widths increased significantly from 0.81 to 2.10 mm in the nonextraction sample. When arch widths of both groups were measured from the most labial surfaces of the teeth at a constant depth, the average arch width of both arches was significantly wider in the extraction sample (1.8 mm wider in the mandible and 1.7 mm wider in the maxilla). The mean esthetic score and the number of teeth displayed during a smile did not differ between the groups. The results indicate that arch width is not decreased at a constant arch depth because of extraction treatment, and smile esthetics are the same in both groups of patients.

The effect of axial midline angulation on dental esthetics.

The purpose of this study was to analyze the effect of various degrees of axial midline angulation on the attractiveness of a smile. We explored the influence of age, race, sex, direction of midline deviation, education, occupation, and dominant hand on each evaluator's perception of dental esthetics. Photographs of smiling subjects--one man and one woman--were altered to produce both left and right axial midline angulations in 5 degree increments. Fifty orthodontists and 50 laypeople evaluated these altered photographs by assigning both a numerical attractiveness rating and an acceptable or unacceptable rating to each. The results showed that attractiveness scores and acceptability ratings declined consistently as axial midline angulation increased. Statistical analysis showed that both sex of the subject and occupation of the judge were significant variables (P < .05) in the evaluation of the subjects. Age, race, sex of the judge, education level, direction of midline deviation, and dominant hand were not statistically significant. The mean acceptable midline angulation for the male subject was 6.6 +/- 4.5 degrees for orthodontists and 10.7 +/- 6.2 degrees for laypeople. For the female subject, the mean acceptable threshold was 6.4 +/- 4.0 degrees for orthodontists and 10.0 +/- 6.1 degrees for laypeople (P < .001). Discrepancies of 10 degrees were unacceptable by 68% of orthodontists and 41% of laypeople.

A mini-implant for orthodontic anchorage in a deep overbite case.

This article describes the orthodontic treatment of a 19-year-old female patient with anterior crowding. There was a moderate arch length discrepancy in the lower dental arch, a significant deep overbite, and a "gummy smile." We inserted an orthodontic mini-implant as anchorage for the intrusion of the upper incisor segment, followed by alignment of the upper and lower dental arches with an edgewise appliance without tooth extraction. The overbite was corrected from +7.2 mm to +1.7 mm by upper incisor intrusion, and the gummy smile was improved. Good occlusion and facial esthetics were achieved, and these results have been maintained for two years after completion of the active treatment.

Commentary: The gingival smile line

Commentary: The gingival smile line

Analysis and investigation on satisfaction of nurse-patient communication in outpatient

Objective To analyze and investigate the satisfaction of nurse-patient communication in outpatient, and provide the basis for the further development. Methods 187 outpatients were surveyed by a questionnaire on the nurse-patient communication satisfaction. Results The average satisfaction of patients was 61.1%. There was less than 50 percent satisfaction on initiative service, smiling serviee, and health education. Conclusion It is necessary to strengthen the communication between nurses and patients and improve patient satisfaction. Key words: Communication between nurses and patients; Quality of service; Analysis and inves-tigation

Preliminary outcomes of patients with relapsed or refractory NK/T-cell lymphoma treated by SMILE regimen

Objective To evaluate the efficacy and toxicity of SMILE regimen for NK/T-cell lymphoma. Methods From November 2006 to February 2008, 5 patients with relapsed and 5 with first treatment NK/T-cell lymphoma were involved in this study. These patients were treated with SMILE regimen including methotrexate, isofosfamide, L-asparaginase and etoposide.1 patient were treated with autolognus hematopoietic stem cell transplantation (AHSCT), and 2 patients received local regional radiation following SMILE. Results Among 10 patients, 8 were eligible to response evaluation. The overall response rate for whole group was 50 %(4/8) without complete remission. The overall response rate for both previously untreated and relapsed patients were 50 %(2/4). Major toxicity were bone marrow supression and transient transaminase elevation, the incidence of grade Ⅲ -Ⅳ neutroponia was 65 %, and febrile neutropenia was 25 %, Grade Ⅲ transaminase elevation was 10 %. Other toxicities were mild, no treatment-related mortality occurred. 26.1% cycles discontinued due to severe side effect. Conclusion SMILE may be an effective regimen for relapsed or refractory NK/T-cell lymphoma while significant toxicities were observed. Further investigation is requried before SMILE become a standard combination for relapsed or refractory NK/T-cell lymphoma. Key words: Lymphoma, non-Hodgkin; Relapse/refractory NK/T-cell lymphoma; Combined, chemotherapy

Smile your way to health

Smile your way to health

Service with a smile: It's a necessity

Service with a smile: It's a necessity