PMID- 27019821
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20160329
LR  - 20200930
IS  - 2234-7518 (Print)
IS  - 2005-372X (Electronic)
VI  - 46
IP  - 2
DP  - 2016 Mar
TI  - Effect of passive self-ligating bracket placement on the posterior teeth on 
      reduction of frictional force in sliding mechanics.
PG  - 73-80
LID - 10.4041/kjod.2016.46.2.73 [doi]
AB  - OBJECTIVE: The purpose of this study was to investigate the static (SFF) and 
      kinetic frictional forces (KFF) in sliding mechanics of hybrid bracket systems 
      that involve placing a conventional bracket (CB) or active self-ligating bracket 
      (ASLB) on the maxillary anterior teeth (MXAT) and a passive SLB (PSLB) on the 
      maxillary posterior teeth (MXPT). METHODS: The samples consisted of two 
      thoroughbred types (group 1, anterior-CB + posterior-CB; group 2, anterior-ASLB + 
      posterior-ASLB) and four hybrid types (group 3, anterior-CB + posterior-PSLB-type 
      1; group 4, anterior-CB + posterior-PSLB-type 2; group 5, anterior-ASLB + 
      posterior-PSLB-type 1; group 6, anterior-ASLB + posterior-PSLB-type 2) (n = 13 
      per group). After maxillary dentition alignment and maxillary first premolars 
      removal in the stereolithographically-made typodont system, a 0.019 x 0.025-inch 
      stainless steel wire was drawn through the right quadrant of the maxillary arch 
      at 0.5 mm/min for 5 min. The SFF and KFF were measured with a mechanical testing 
      machine and statistical analyses were performed. RESULTS: Four different 
      categories of SFF and KFF were observed among all groups (all p < 0.001). Group 1 
      demonstrated the highest SFF and KFF; groups 4 and 3 were second and third 
      highest, respectively. The fourth category included groups 2, 5, and 6. Placing 
      PSLBs on the MXPT resulted in significant SFF and KFF reductions in cases with 
      CBs on the MXAT, but not in cases with ASLBs on the MXAT. CONCLUSIONS: These data 
      might aid in the development of a hybrid bracket system that enables low-friction 
      sliding of an archwire through the MXPT.
FAU - Kim, Kyu-Ry
AU  - Kim KR
AD  - Department of Orthodontics, School of Dentistry, Seoul National University, 
      Seoul, Korea.
FAU - Baek, Seung-Hak
AU  - Baek SH
AD  - Department of Orthodontics, School of Dentistry, Seoul National University, 
      Seoul, Korea.; Dental Research Institute, Seoul National University, Seoul, 
      Korea.
LA  - eng
PT  - Journal Article
DEP - 20160318
PL  - Korea (South)
TA  - Korean J Orthod
JT  - Korean journal of orthodontics
JID - 101582382
PMC - PMC4807151
OTO - NOTNLM
OT  - Frictional force
OT  - Hybrid bracket system
OT  - Self-ligating brackets
OT  - Sliding mechanics
COIS- The authors report no commercial, proprietary, or financial interest in the 
      products or companies described in this article.
EDAT- 2016/03/29 06:00
MHDA- 2016/03/29 06:01
PMCR- 2016/03/01
CRDT- 2016/03/29 06:00
PHST- 2015/06/03 00:00 [received]
PHST- 2015/07/23 00:00 [revised]
PHST- 2015/07/24 00:00 [accepted]
PHST- 2016/03/29 06:00 [entrez]
PHST- 2016/03/29 06:00 [pubmed]
PHST- 2016/03/29 06:01 [medline]
PHST- 2016/03/01 00:00 [pmc-release]
AID - 10.4041/kjod.2016.46.2.73 [doi]
PST - ppublish
SO  - Korean J Orthod. 2016 Mar;46(2):73-80. doi: 10.4041/kjod.2016.46.2.73. Epub 2016 
      Mar 18.