PMID- 32895182
OWN - NLM
STAT- MEDLINE
DCOM- 20200910
LR  - 20201001
IS  - 1673-4254 (Print)
IS  - 2663-0842 (Electronic)
IS  - 1673-4254 (Linking)
VI  - 40
IP  - 8
DP  - 2020 Aug 30
TI  - [Effect of orthodontic traction on the microstructure of dental enamel].
PG  - 1165-1171
LID - 10.12122/j.issn.1673-4254.2020.08.14 [doi]
AB  - OBJECTIVE: To investigate the effect of orthodontic traction on the 
      microstructure of dental enamel. METHODS: Forty-eight isolated premolars were 
      randomly divided into 6 groups (n=8), including Group A (blank control group), in 
      which the teeth were bonded with the orthodontic brackets without any loading 
      force; Groups B1, B2, and B3 where the teeth were bonded with the orthodontic 
      brackets using clinical adhesives and loaded with 50 g force for 6 months, 200 g 
      force for 6 months, and 200 g force for 1 month, respectively; and Groups C1 and 
      C2, where the teeth were bonded with straight wire brackets using light curing 
      bonding and chemical curing bonding techniques, respectively. All the teeth were 
      embedded with non-decalcified epoxy resin. Scanning electron microscope (SEM), 
      atomic force microscope (AFM), and energy spectrometer (EDS) were used to analyze 
      interface morphology and elemental composition of the teeth sliced with a hard 
      tissue microtome. RESULTS: Compared with those in Group A, the teeth in the other 
      5 groups showed increased adhesive residue index with microcracks and void 
      structures on the enamel surface under SEM; AFM revealed microcracks on the 
      enamel surface with angles to the grinding direction. A larger loading force on 
      the bracket resulted in more microcracks on the enamel interface. The interface 
      roughness differed significantly between Groups A and C2, and the peak-to-valley 
      distance differed significantly between Groups A, C, and C2. CONCLUSIONS: 
      Orthodontic traction can cause changes in the microstructure of normal dental 
      enamel.
FAU - Li, Zhixin
AU  - Li Z
AD  - School of Stomatology, Lanzhou University, Lanzhou 730000, China.
FAU - Zhang, Kailiang
AU  - Zhang K
AD  - School of Stomatology, Lanzhou University, Lanzhou 730000, China.
AD  - Department of Prosthodontics, Hospital of Stomatology, Lanzhou University, 
      Lanzhou 730000, China.
FAU - Li, Ruiping
AU  - Li R
AD  - School of Stomatology, Lanzhou University, Lanzhou 730000, China.
FAU - Xu, Lingdan
AU  - Xu L
AD  - School of Stomatology, Lanzhou University, Lanzhou 730000, China.
FAU - He, Lulu
AU  - He L
AD  - School of Stomatology, Lanzhou University, Lanzhou 730000, China.
FAU - Pang, Xiaochan
AU  - Pang X
AD  - School of Stomatology, Lanzhou University, Lanzhou 730000, China.
FAU - Lu, Jiyuan
AU  - Lu J
AD  - School of Stomatology, Lanzhou University, Lanzhou 730000, China.
FAU - Cao, Baocheng
AU  - Cao B
AD  - School of Stomatology, Lanzhou University, Lanzhou 730000, China.
AD  - Department of Orthodontics, Hospital of Stomatology, Lanzhou University, Lanzhou 
      730000, China.
FAU - Zhang, Baoping
AU  - Zhang B
AD  - School of Stomatology, Lanzhou University, Lanzhou 730000, China.
AD  - Department of Oral and Maxillofacial Surgery, Hospital of Stomatology, Lanzhou 
      University, Lanzhou 730000, China.
LA  - chi
PT  - Journal Article
PL  - China
TA  - Nan Fang Yi Ke Da Xue Xue Bao
JT  - Nan fang yi ke da xue xue bao = Journal of Southern Medical University
JID - 101266132
RN  - 0 (Resin Cements)
SB  - IM
MH  - *Dental Enamel
MH  - Materials Testing
MH  - Orthodontic Brackets
MH  - Resin Cements
MH  - Surface Properties
MH  - Traction
PMC - PMC7429159
OTO - NOTNLM
OT  - enamel demineralization
OT  - enamel layer
OT  - microstructure
OT  - orthodontic force
EDAT- 2020/09/09 06:00
MHDA- 2020/09/12 06:00
PMCR- 2020/08/20
CRDT- 2020/09/08 05:18
PHST- 2020/09/08 05:18 [entrez]
PHST- 2020/09/09 06:00 [pubmed]
PHST- 2020/09/12 06:00 [medline]
PHST- 2020/08/20 00:00 [pmc-release]
AID - nfykdxxb-40-8-1165 [pii]
AID - 10.12122/j.issn.1673-4254.2020.08.14 [doi]
PST - ppublish
SO  - Nan Fang Yi Ke Da Xue Xue Bao. 2020 Aug 30;40(8):1165-1171. doi: 
      10.12122/j.issn.1673-4254.2020.08.14.