PMID- 8506816
OWN - NLM
STAT- MEDLINE
DCOM- 19930708
LR  - 20151119
IS  - 0889-5406 (Print)
IS  - 0889-5406 (Linking)
VI  - 103
IP  - 6
DP  - 1993 Jun
TI  - Scanning electron microscope (SEM) evaluation of clinical failures of single 
      crystal ceramic brackets.
PG  - 537-44
AB  - The objective of this work was to perform failure analysis on Starfire brackets 
      that failed in clinical use. The failed brackets were examined with a scanning 
      electron microscope (SEM) to obtain micrographs at magnifications of 20, 50, 100, 
      and other magnifications, whenever necessary. With the aid of the micrographs, 
      the fracture origin and the probable defect that initiated the fracture were 
      identified. The percentages of failure origins for each area of the bracket were 
      arch wire slot 36.0%, tie wing slot 22.0%, undetermined 11.0%, saddle 9.0%, 
      impact 9.0%, during removal 7.5%, and parting area 5.5%. By observing the 
      micrographs pertaining to each field failure, the primary causes of failure were 
      internal defects 47.5%, machining interference 42.5%, and undetermined 10.0%.
FAU - Viazis, A D
AU  - Viazis AD
AD  - Department of Orthodontics, Baylor College of Dentistry, Dallas, TX 75246.
FAU - Chabot, K A
AU  - Chabot KA
FAU - Kucheria, C S
AU  - Kucheria CS
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Am J Orthod Dentofacial Orthop
JT  - American journal of orthodontics and dentofacial orthopedics : official 
      publication of the American Association of Orthodontists, its constituent 
      societies, and the American Board of Orthodontics
JID - 8610224
RN  - LMI26O6933 (Aluminum Oxide)
SB  - IM
MH  - Aluminum Oxide
MH  - Ceramics/*chemistry
MH  - Dental Debonding
MH  - Dental Stress Analysis
MH  - Equipment Failure
MH  - Hardness
MH  - Humans
MH  - Materials Testing
MH  - Microscopy, Electron, Scanning
MH  - *Orthodontic Brackets
MH  - Surface Properties
MH  - Tensile Strength
EDAT- 1993/06/01 00:00
MHDA- 1993/06/01 00:01
CRDT- 1993/06/01 00:00
PHST- 1993/06/01 00:00 [pubmed]
PHST- 1993/06/01 00:01 [medline]
PHST- 1993/06/01 00:00 [entrez]
AID - 0889-5406(93)70094-5 [pii]
AID - 10.1016/0889-5406(93)70094-5 [doi]
PST - ppublish
SO  - Am J Orthod Dentofacial Orthop. 1993 Jun;103(6):537-44. doi: 
      10.1016/0889-5406(93)70094-5.