| A morphometric study on stainless steel crowns of the primary first molar using a three dimensional scanner |
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Jihyun Lee1, Teo Jeon Shin2, Young-Jae Kim3, Jung-Wook Kim4, Ki-Taeg Jang5, Sang-Hoon Lee6, Chong-Chul Kim7, Hong-Keun Hyun8 |
1Department of Pediatric Dentistry, Dental Research Institute, School of Dentistry, Seoul National University
2Department of Pediatric Dentistry, Dental Research Institute, School of Dentistry, Seoul National University
3Department of Pediatric Dentistry, Dental Research Institute, School of Dentistry, Seoul National University
4Department of Pediatric Dentistry, Dental Research Institute, School of Dentistry, Seoul National University
5Department of Pediatric Dentistry, Dental Research Institute, School of Dentistry, Seoul National University
6Department of Pediatric Dentistry, Dental Research Institute, School of Dentistry, Seoul National University
7Department of Pediatric Dentistry, Dental Research Institute, School of Dentistry, Seoul National University
8Department of Pediatric Dentistry, Dental Research Institute, School of Dentistry, Seoul National University |
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| Abstract |
Objectives
The aim of this study was to assess the morphologic characteristics of two types of stainless steel crowns (SSCs) for the first primary molar using a 3D scanner. Study design: Two types of SSCs, KIDS CROWN (KC) and 3M ESPE ND-96 (ND), for the first primary molars were scanned using a 3D scanner. The mesiodistal and buccolingual diameters at the height of the contour and the cervical margin, occlusocervical diameters on the mesial, distal, buccal, and lingual aspects were measured, and the crown shape ratio, the smooth surface crown height ratio, and the cervical convergence were calculated. Results: In the crown shape ratio of the mandibular SSC, KC was larger buccolingually compared with ND. In the smooth surface crown height ratio, ND was larger than KC in all of the maxilla and mesial, distal, and lingual aspects of the mandible. ND was more convergent to the cervical mesiodistally and buccolingually compared with KC. Conclusion: In the superimposed images of the maxillary SSC, the mesiolingual and distolingual line angles of KC were more prominent compared with ND. In the mandible, ND demonstrated higher cusps and more obvious buccal developmental lobes than KC. ND showed a larger cervical undercut than KC. |
| Key Words:
stainless steel crown;primary first molar;three dimensional scanner;crown morphometry; |
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