Feasibility of 3-Dimensional Visual Guides for Preparing Pediatric Zirconia Crowns: An In Vitro Study

This study evaluated the feasibility of a tooth preparation guide for prefabricated zirconia crowns (PZCs). Three-dimensional surface data for PZCs of the left maxillary primary first molar and left mandibular primary second molar were obtained using a model scanner. The tooth preparation data were...

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Published inInternational journal of environmental research and public health Vol. 17; no. 16; p. 5732
Main Authors Kang, Ho Yeon, Lee, Hyeonjong, Chae, Yong Kwon, Hong, Seoung-Jin, Jeong, Yun Yeong, Lee, Ko Eun, Kim, Mi Sun, Lee, Hyo-Seol, Choi, Sung Chul, Nam, Ok Hyung
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 08.08.2020
MDPI
Subjects
Dentistry
Dentists
Dentition
Feasibility studies
Mandible
Maxilla
Molars
Pediatrics
Prefabrication
Scanners
Teeth
Zirconia
Zirconium dioxide
United States > US
Japan
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Summary:This study evaluated the feasibility of a tooth preparation guide for prefabricated zirconia crowns (PZCs). Three-dimensional surface data for PZCs of the left maxillary primary first molar and left mandibular primary second molar were obtained using a model scanner. The tooth preparation data were digitally designed to harmonize with the adjacent teeth on the mixed dentition model and visualized using a color-coded map, which presents the required amount of tooth reduction. Twenty participants were recruited for preparing teeth with and without using the tooth preparation guide. The following three parameters were evaluated: tooth preparation time, harmony score, and amount of tooth reduction. The preparation time when using the guide was significantly reduced (p < 0.05), and a significant difference was observed in the harmony scores for the maxillary primary first molar preparation. Furthermore, the amount of tooth reduction was significantly different for both maxillary and mandibular primary molars (p < 0.05) in terms of the occlusal distal surface and buccal line angle in the maxillary primary first molars, and the smooth surfaces, proximal surfaces, and mesial line angles in the mandibular primary second molars. Thus, the results suggest that a tooth preparation guide could facilitate better tooth preparation for PZCs.
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Ho Yeon Kang and Hyeonjong Lee contributed equally as first authors.
ISSN:1660-4601
1661-7827
1660-4601
DOI:10.3390/ijerph17165732