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JADA Specialty Scan - Cosmetic/Esthetic
Cosmetic/Esthetic - A Quarterly Newsletter on Dental SpecialtiesJADA

Personality type and tooth shade selection

Psychologists correlate color choice with personality traits and mood. Although it’s well recognized that color interpretation is largely a function of both physiological and psychological health, scientists in Saudia Arabia found that the psychological component involved in color perception was insufficiently explored. Important in enabling better esthetic outcomes and improving patient satisfaction, they deemed color perception to be critical in understanding personality’s role in the shade selection process and conducted a study to assess the influence of personality on color perception and efficiency in shade selection. They published their findings in the Spring 2016 issue of International Journal of Esthetic Dentistry.

Incorporating understanding that the complexity of shade selection can be better addressed by the judicious combination of both visual selection and instrument color analysis, they investigated. Among dental students and dental assistants at King Khalid University, 270 volunteers at age 25 ± 5 years were selected as participants. The age range studied reflected evidence showing color perception deteriorates with advancing age, especially in people older than 50 years.

Scientists determined the personality of each participant by administering the Meyers-Briggs Type Indicator (MBTI) questionnaire. Based on the theories proposed by Carl Gustav Jung, the questionnaire is based on the four principal psychological functions by which people experience the world: sensation, intuition, feeling, and thinking. Widely used to profile personality, the four MBTI dichotomies on which the attitude of people is based are E-I (extroversion/introversion), S-N (sensing/intuition), T-F (thinking/feeling), and J-P (judging/perceiving).

Scientists determined each participant’s personality type by calculating the answers to the questions on the MBTI. The shades of two nickel-chromium disks of 15 millimeters in diameter from a standard casting procedure were measured by spectrophotometer and used as a reference for comparison with visual color selection. Participants’ visual shade selection process incorporated the Vita 3D-Master. Scientists calculated the sum of the color difference between the disks and the selected shade tab for each participant.

The lowest color difference scores, which indicated better shade selection, were found among specific personality groups. For example, better shade selection ability was found among judging personalities, with traits such as objectivity and organization. Perceiving personalities showed poorer tooth shade selection ability. In discussion, researchers noted that the psychological well-being of the judging personality type is considered to be higher than that of the perceiving personality type.

They found that extroverts performed better at shade selection than introverts and deduced that the fact that extroverts are able to make objective immediate decisions may be helpful for improved tooth shade selection. Scientists’ study also supported evidence that thinking personalities have better shade selection capability than feeling personalities. “The reasonable, logical, decision-making ability of thinking personalities make them better at shade selection than feeling personalities, who tend to associate or empathize with a situation,” researchers said.

Read the original article.


Consulting Editor: Luiz Meirelles DDS, MS, PhD
Director, Professional Products and Standards
ADA Science Institute

An age-specific oral health–related quality of life measure

Oral health has a meaningful impact on quality of life among young adults aged 21 to 35 years, according to a study published in the Fall 2015 issue of Journal of Public Health Dentistry. Furthermore, clenching or teeth grinding and tooth color are among oral factors this age group feels affects their health the most.

The findings were among results obtained by scientists at Yale University seeking to develop an oral health–related quality of life (OHRQoL) measure for young adults. Because the current instrument used for such evaluation (Oral Health Impact Profile) is geared toward older adults, authors said questions may not be applicable to young adults and may inaccurately estimate this group’s OHRQoL.

“Developing a measure for use among young adults is appropriate given striking declines in perceived appearance and eating difficulties after age 35,” authors said.

Finding the necessity in the development of a new questionnaire focusing on this age group’s common concerns, researchers developed a metric that differed from other published versions in a variety of ways including that it asks questions only pertinent to the specific age range of the participant, “thus minimizing participant burden without sacrificing comprehensiveness.” The tool is intended to present items around three established constructs: social, psychological, and physical using a Likert-type frequency scale. The final OHRQoL survey included 21 items.

Among results, scientists found that self-perception and anxiety were the most important concerns of respondents. Also, higher levels of education, having insurance, and a higher rating of overall health were associated with higher ratings of OHRQoL.

In the discussion section, researchers described the instrument by saying it reflects an attempt to holistically understand OHRQoL rooted in several etiologies and encompassing several domains of interest.

They described the benefits of further research and asserted, “The goal of the proposed work was to develop and establish the psychometric properties of a brief measure of OHRQoL. The measurement tool proposed demonstrates initial psychometric properties of reliability and validity.”

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OptraGate in blue and pink
OptraGate is a latex-free lip and cheek retractor that is easy to use, quick to place, and comfortable for the patient. The proven lip and cheek retractor is now also available for children in two new colors, blue and pink.  Learn more now.

Closing anterior interdental spaces

A conservative approach to correct diastemas in the anterior maxillary teeth can produce optimal esthetics while conserving dental hard tissue, particularly in esthetically demanding cases, authors of an article published in the November 2015 issue of Journal of Esthetic and Restorative Dentistry reported.

Meeting patients’ growing demands for better esthetics without incurring greater costs or lengthening patient appointments is an ever-increasing challenge for clinicians. Although there are many available techniques for closing an anterior diastema, indirect restorative options typically require destruction of healthy tooth structure, whereas direct techniques are minimally invasive and can be done cost effectively in a single appointment.

Researchers in Chilé described a direct technique in the case of a 30-year-old woman with multiple diastemas. They used resin-based composites after buccolingual layering with a customized silicon index. In light of the highlighted case, they strongly recommended a minimally invasive approach with adhesive direct restorations for the management of esthetics problems of the anterior teeth.

The buccolingual layering technique achieved an immediate and predictable esthetic resolution of the diastemas. The missing palatal enamel and dentin masses were replaced with enamel and dentin composites (in an additive nonreplacing mode), whereas for the thin buccoproximal enamel layer a composite resin was used.

“Ideally, a nanofilled composite resin should be used for a buccolingual layering technique that can provide good optical properties, before-curing slumping resistance, and after-curing wear resistance,” researchers said in the discussion section. Among recommendations, they noted previous research showing that central diastemas usually need to be closed from both adjacent teeth and lateral diastemas can be successfully managed in a unilateral approach.

While citing myriad advantages of a buccolingual layering technique, they also cautioned, “However, this approach requires a trained professional in restorative dentistry to optimize the results, to follow an appropriate treatment sequence, to devote the necessary time to execute this sequence of treatment (which probably would be less than prosthodontics or other invasive approaches), and like most dental treatments requires periodic controls.”

The clinical technique is outlined in the article.

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The changing landscape of ceramics

Prosthodontist Dr. Kenneth Malament has a long history with dental ceramics in his Boston, Massachussets-based practice.  During his career he has made it a point to keep meticulous records of his material usage and now he shares his experience in a new Dentistry Today article. Read more as Dr. Malament discusses IPS e.max, zirconia and how material options can make or break a case.

ADA video illustrates esthetic options

For patients to imagine smile improvements, visual aids are essential. The ADA video “Smile Makeover” helps patients understand esthetic treatment as well as possible complications from crooked or crowded teeth.
The video discusses cosmetic options such as veneers, bonding, whitening, gum contouring and orthodontics, while emphasizing the positive effects of a beautiful, healthy smile. The video is available on the Toothflix 2.0 Dental Procedures DVD. To order, call 1-800-947-4746 or go to adacatalog.org. Readers who use the code 16406E before April 8 can save 15 percent on all ADA Catalog products.


Times and dentistry are changing
There’s an old adage in business based on three ideas: low cost, fast and good. Experts say you can be two of three, but never all three. Your business can be fast and good, but you have to sacrifice low cost. Your business can be low cost and good, but you have to sacrifice speed. Your business can be low cost and fast, but you have to sacrifice good.  But the times, just like dentistry — they’re a-changing. Read more now.


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