語系:
繁體中文
English
說明(常見問題)
登入
回首頁
切換:
標籤
|
MARC模式
|
ISBD
Thermal Properties of Commonly Used Clear Aligner Systems As-Received and After Clinical Use.
紀錄類型:
書目-語言資料,印刷品 : Monograph/item
正題名/作者:
Thermal Properties of Commonly Used Clear Aligner Systems As-Received and After Clinical Use./
作者:
Wenger, Louis.
出版者:
Ann Arbor : ProQuest Dissertations & Theses, : 2017,
面頁冊數:
43 p.
附註:
Source: Masters Abstracts International, Volume: 79-03.
Contained By:
Masters Abstracts International79-03.
標題:
Dentistry. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10604303
ISBN:
9780355104417
Thermal Properties of Commonly Used Clear Aligner Systems As-Received and After Clinical Use.
Wenger, Louis.
Thermal Properties of Commonly Used Clear Aligner Systems As-Received and After Clinical Use.
- Ann Arbor : ProQuest Dissertations & Theses, 2017 - 43 p.
Source: Masters Abstracts International, Volume: 79-03.
Thesis (M.S.)--Marquette University, 2017.
This item must not be sold to any third party vendors.
Background/Objectives: The purpose of this study was to investigate the thermal properties, particularly glass transition temperature, of the polymers that are used to fabricate three different types of modern orthodontic aligners. Invisalign, (Align Technology, Inc, Santa Clara, CA, USA), Simpli5 (Allesee Orthodontic Appliances, Sturtevant, WI, USA), and ClearCorrect (ClearCorrect, Round Rock, TX, USA) were examined both as-received and after clinical use to determine if any differences were present both between and within aligners. Materials/Methods: Orthodontic aligners were collected from three different patients using the systems under investigation after two weeks of intraoral use. Duplicate, un-used samples were obtained from the manufacturers for direct comparison. The aligners were then sectioned into sizes that were compatible with the instrumentation being used to analyze them. Differential Scanning Calorimetry (DSC) was used to individually analyze the thermal properties of each sample. The resulting thermograms were then compared to investigate potential differences between brands and conditions. Of particular interest was the temperature at which each polymer went through the glass transition phase. Enthalpy relaxation, recrystallization temperature, and melting point were also analyzed. Results: There was no statistical difference in glass transition temperature between as-received and after use Invisalign, ClearCorrect, or Simpli5 aligners (p>0.05). In addition, there was no significant difference in recrystallization peak and recrystallization enthalpy between as-received and after use Simpli5 aligners (p>0.05). There was a significant decrease in melting peak and melting enthalpy between as-received and after use Simpli5 aligners (p<0.05). A lack of recrystallization and melting peaks indicates that Invisalign and ClearCorrect are a thermoset material while the presence of these peaks indicates that Simpli5 is thermoplastic. All materials possessed a glass transition temperature above the maximum temperature that is found intraorally. Conclusions: Glass transition temperature did not significantly change after clinical use in the tested orthodontic aligners, indicating the stability of this property throughout normal treatment. All three types have a glass transition temperature above the maximum temperature that is found intraorally, which has been shown to be a benefit to an aligner’s mechanical properties. Melting peak and melting enthalpy showed a small decrease after use in Simpli5, indicating some structural aging intraorally.
ISBN: 9780355104417Subjects--Topical Terms:
674038
Dentistry.
Thermal Properties of Commonly Used Clear Aligner Systems As-Received and After Clinical Use.
LDR
:03705nam a2200337 4500
001
1121817
005
20240624103641.5
006
m o d
007
cr#unu||||||||
008
240823s2017 ||||||||||||||||| ||eng d
020
$a
9780355104417
035
$a
(MiAaPQ)AAI10604303
035
$a
(MiAaPQ)marquette:11233
035
$a
AAI10604303
040
$a
MiAaPQ
$c
MiAaPQ
100
1
$a
Wenger, Louis.
$3
1437600
245
1 0
$a
Thermal Properties of Commonly Used Clear Aligner Systems As-Received and After Clinical Use.
260
1
$a
Ann Arbor :
$b
ProQuest Dissertations & Theses,
$c
2017
300
$a
43 p.
500
$a
Source: Masters Abstracts International, Volume: 79-03.
500
$a
Publisher info.: Dissertation/Thesis.
500
$a
Advisor: Berzins, David.
502
$a
Thesis (M.S.)--Marquette University, 2017.
506
$a
This item must not be sold to any third party vendors.
520
$a
Background/Objectives: The purpose of this study was to investigate the thermal properties, particularly glass transition temperature, of the polymers that are used to fabricate three different types of modern orthodontic aligners. Invisalign, (Align Technology, Inc, Santa Clara, CA, USA), Simpli5 (Allesee Orthodontic Appliances, Sturtevant, WI, USA), and ClearCorrect (ClearCorrect, Round Rock, TX, USA) were examined both as-received and after clinical use to determine if any differences were present both between and within aligners. Materials/Methods: Orthodontic aligners were collected from three different patients using the systems under investigation after two weeks of intraoral use. Duplicate, un-used samples were obtained from the manufacturers for direct comparison. The aligners were then sectioned into sizes that were compatible with the instrumentation being used to analyze them. Differential Scanning Calorimetry (DSC) was used to individually analyze the thermal properties of each sample. The resulting thermograms were then compared to investigate potential differences between brands and conditions. Of particular interest was the temperature at which each polymer went through the glass transition phase. Enthalpy relaxation, recrystallization temperature, and melting point were also analyzed. Results: There was no statistical difference in glass transition temperature between as-received and after use Invisalign, ClearCorrect, or Simpli5 aligners (p>0.05). In addition, there was no significant difference in recrystallization peak and recrystallization enthalpy between as-received and after use Simpli5 aligners (p>0.05). There was a significant decrease in melting peak and melting enthalpy between as-received and after use Simpli5 aligners (p<0.05). A lack of recrystallization and melting peaks indicates that Invisalign and ClearCorrect are a thermoset material while the presence of these peaks indicates that Simpli5 is thermoplastic. All materials possessed a glass transition temperature above the maximum temperature that is found intraorally. Conclusions: Glass transition temperature did not significantly change after clinical use in the tested orthodontic aligners, indicating the stability of this property throughout normal treatment. All three types have a glass transition temperature above the maximum temperature that is found intraorally, which has been shown to be a benefit to an aligner’s mechanical properties. Melting peak and melting enthalpy showed a small decrease after use in Simpli5, indicating some structural aging intraorally.
590
$a
School code: 0116.
650
4
$a
Dentistry.
$3
674038
690
$a
0567
710
2
$a
Marquette University.
$b
Dentistry.
$3
1437601
773
0
$t
Masters Abstracts International
$g
79-03.
790
$a
0116
791
$a
M.S.
792
$a
2017
793
$a
English
856
4 0
$u
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10604303
筆 0 讀者評論
多媒體
評論
新增評論
分享你的心得
Export
取書館別
處理中
...
變更密碼[密碼必須為2種組合(英文和數字)及長度為10碼以上]
登入