Three-dimensional microscopic comparison of wear behavior between immature and mature enamel: an in vitro study

BMC Oral Health

Research

Kanae Wada¹  Tsutomu Iwamoto¹  Manhal Ijbara²  Nesreen A. Salim³  Junichiro Wada⁴ 

[1] Department of Pediatric Dentistry/Special Needs Dentistry, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, Japan;Department of Pediatric Dentistry/Special Needs Dentistry, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, Japan;Hail Dental Center and King Khalid Hospital, Ministry of Health, 55425 2910, Hail, Kingdom of Saudi Arabia;Prosthodontic Department, Faculty of Dentistry, School of Dentistry, The University of Jordan Hospital, The University of Jordan, Amman, Jordan;Removable Partial Denture Section, Graduate School, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, 113-8549, Tokyo, Japan;

关键词: Tooth wear;    Dental enamel;    Permanent dentition;    Adolescents;    Microscopy;   

DOI  :  10.1186/s12903-023-02751-3

 received in 2022-12-05, accepted in 2023-01-16,  发布年份 2023

来源: Springer

【 摘 要 】

BackgroundDental enamel, the hardest outermost layer of a human tooth, is subjected to occlusal forces throughout life during different oral function as talking, mastication etc. Due to this continuous stress, wear causes the loss of this protective shell. This study aimed to detect microscopic differences in enamel’s wear behavior among different age groups of adolescents and adults.Aims and methodsEnamel specimens from immature open-apex and mature closed-apex premolars were subjected to simulated occlusal wear of impact and sliding wear test ISWT. Upper and lower enamel specimens were made to come in contact under controlled conditions. The enamel specimens’ surfaces were examined using different microscopes. The upper and lower specimens were subjected to the following tests; pre-test light microscopy examination, enamel specimens’ preparation for ISWT, scanning laser confocal microscopy of upper specimens, three-dimensional (3D) colored laser microscope and a Profilometer imaging of the lower specimens.ResultsWear characteristics, including wear areas, crater depths, and relation to enamel microstructures, differed among different age groups. Immature enamel from the upper specimens was more resistant to chipping than mature enamel with no statistically significant wear area difference. The immature enamel craters from the lower specimens were wider and deeper than those in the mature enamel; the wear areas in the mature enamel in the lower specimens were almost flat and smooth. The wear areas in the immature enamel in the lower specimens were significantly larger than those in the mature enamel.ConclusionsWear characteristics of the immature enamel are different from those of the mature enamel. Hence, it should be repaired using restorative materials with compatible wear properties.

【 授权许可】

CC BY   
© The Author(s) 2023

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