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Journal of Peking University(Health Sciences) ›› 2020, Vol. 52 ›› Issue (1): 187-192. doi: 10.19723/j.issn.1671-167X.2020.01.030

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Application and exploration of Smile Lite MDP portable photography system in aesthetic photography of anterior teeth

Min LIU1,Jun-dang ZHANG1,Hong-qiang YE1,Yi-jiao ZHAO2,Xu-bin ZHAO3,Wen-yan ZHAO4,Yun-song LIU1,△(),Yong-sheng ZHOU1   

  1. 1. Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
    2. Center of Digital Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, China
    3. Department of Prosthodontics, Yinchuan Stomatology Hosptial, Yinchuan 750002, China
    4. Department of Implantation, Yinchuan Stomatology Hosptial, Yinchuan 750002, China
  • Received:2019-09-24 Online:2020-02-18 Published:2020-02-20
  • Contact: Yun-song LIU E-mail:liuyunsong@hsc.pku.edu.cn
  • Supported by:
    Supported by the New Clinical Technology Program of Peking University Hospital of Stomatology(PKUSSNCT-19G01);the Grant of the Key Research and Development Program of Ningxia Hui Autonomous Region(2018BEG02012)

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Abstract:

Objective: To explore the possibility of the Smile Lite MDP (Smile Lite Mobile Dental Photograph) portable dental photography system applying in anterior teeth aesthetic photography, and to provide the chance to simplify aesthetic photography process and facilitate communication among patients, dentists and dental technitians. Methods: The Smile Lite MDP photography system combined with the smartphone were used to photograph the front occlusal phase photos of anterior teeth. The photographic conditions including the color temperature parameter, the Smile Lite MDP light position and the intensity settings were explored. The best photographic conditions were chosen by blind evaluation within expe-rienced dentists and technicians through the method of the visual analogue scale/score (VAS) evaluation, which went through statistical analysis to figure out the optimum photograghic conditions. Smile Lite MDP photography system was used to photograph the front occlusal phase photos of anterior teeth under the optimum parameter by different magnifications. The width/height ratio of the central incisor and the front width ratio of the upper anterior teeth in those photos were measured and calculated respectively. The accuracy of the anterior teeth photos taken by Smile Lite MDP photography system was analyzed based on the photographs taken by digital single lens reflex (DSLR) camera. Results: The optimum color temperature parameter of Smile Lite MDP portable camera system was 5 000 K, the optimum magnification was 4 times, the best light position was the side lights of Smile Lite MDP, the optimum intensity of lights was 2 grades. Photos taken by the optimum parameters won the highest score during the VAS evaluation and the result of statistical analysis had significant difference compared with other groups (P<0.05). When comparing the photos of the upper anterior teeth taken by the Smile Lite MDP portable photography system using 4 times magnification or by DSLR using the standard parameters, there was no significant difference neither in the width/hieght ratio of the central incisor nor in the front width ratio of the upper anterior teeth (P>0.05). Conclusion: The Smile Lite MDP portable dental photography system applying in anterior teeth aesthetic analysis photography was capable to show the color and shape of anterior teeth in an accurate way by using the right photography parameters. Therefore, Smile Lite MDP portable dental photography system was considered to be a simple and easy photographic tool in clinical work.

Key words: Smile Lite MDP System, Dental photography, Esthetics, dental, Odontometry

CLC Number: 

  • R783

Figure 1

Smile Lite MDP photography system"

Figure 2

Photographs taken by Smile Lite MDP system participating in the evaluation of VAS scale A, correlated colour temperature (CCT) 4 750 K and lateral light emitting diode (LED); B, CCT 5 000 K and lateral LED; C, CCT 5 500 K and lateral LED. VAS, visual analogue scale/score."

Figure 3

Front occlusal photography with different magnification with Smile Lite MDP system A, Digital Single Lens Reflex Camera system, magnification 1:3; B, Smile Lite MDP system, magnification 1:2; C, Smile Lite MDP system, magnification 1:3; D, Smile Lite MDP system, magnification 1:4."

Table 1

VAS scale evaluates"

Evaluator Group A (4 750 K) Group B (5 000 K) Group C (5 500) P value of
group comparison		 Multiple comparison
among three groups
Mean SD Rank Mean SD Rank Mean SD Rank
Dentist 8.20 0.47 Ⅱ 9.41 0.36 Ⅲ 6.82 0.72 Ⅰ <0.05 B>A>C
Technician 7.99 0.59 Ⅱ 9.06 0.51 Ⅲ 6.23 0.84 Ⅰ <0.05 B>A>C

Table 2

Paired t test analysis of frontal width ratio of anterior teeth taken by Smile Lite MDP system or by Digital Single Lens Reflex Camera system"

Items B C D
t P t P t P
WC/WL (right) 29.833 <0.001 6.364 <0.001 0.557 0.591
WC/WL (left) 18.983 <0.001 5.196 <0.001 1.309 0.223
WI/WL (right) 24.521 <0.001 6.138 <0.001 0.709 0.496
WI/WL (left) 26.878 <0.001 2.882 0.018 1.137 0.285
WI/HI (right) 1.581 0.175 2.077 0.068 1.616 0.140
WI/HI (left) 2.712 0.042 0.557 0.591 1.406 0.193
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