PMID- 27379835
OWN - NLM
STAT- MEDLINE
DCOM- 20180323
LR  - 20220410
IS  - 1559-2863 (Electronic)
IS  - 0361-7734 (Linking)
VI  - 41
IP  - 6
DP  - 2016 Nov/Dec
TI  - Effect of Preparation Depth on the Marginal and Internal Adaptation of 
      Computer-aided Design/Computer-assisted Manufacture Endocrowns.
PG  - 607-616
AB  - The aim of the study was to evaluate the effect of preparation depth and 
      intraradicular extension on the marginal and internal adaptation of 
      computer-aided design/computer-assisted manufacture (CAD/CAM) endocrown 
      restorations. Standardized preparations were made in resin endodontic tooth 
      models (Nissin Dental), with an intracoronal preparation depth of 2 mm (group 
      H2), with extra 1- (group H3) or 2-mm (group H4) intraradicular extensions in the 
      root canals (n=12). Vita Enamic polymer-infiltrated ceramic-network material 
      endocrowns were fabricated using the CEREC AC CAD/CAM system and were seated on 
      the prepared teeth. Specimens were evaluated by microtomography. Horizontal and 
      vertical tomographic sections were recorded and reconstructed by using the CTSkan 
      software (TView v1.1, Skyscan).The surface/void volume (S/V) in the region of 
      interest was calculated. Marginal gap (MG), absolute marginal discrepancy (MD), 
      and internal marginal gap were measured at various measuring locations and 
      calculated in microscale (mum). Marginal and internal discrepancy data (mum) were 
      analyzed with nonparametric Kruskal-Wallis analysis of variance by ranks with 
      Dunn's post hoc, whereas S/V data were analyzed by one-way analysis of variance 
      and Bonferroni multiple comparisons (alpha=0.05). Significant differences were found 
      in MG, MD, and internal gap width values between the groups, with H2 showing the 
      lowest values from all groups. S/V calculations presented significant differences 
      between H2 and the other two groups (H3 and H4) tested, with H2 again showing the 
      lowest values. Increasing the intraradicular extension of endocrown restorations 
      increased the marginal and internal gap of endocrown restorations.
FAU - Gaintantzopoulou, M D
AU  - Gaintantzopoulou MD
FAU - El-Damanhoury, H M
AU  - El-Damanhoury HM
LA  - eng
PT  - Journal Article
DEP - 20160705
PL  - United States
TA  - Oper Dent
JT  - Operative dentistry
JID - 7605679
RN  - 12001-21-7 (Dental Porcelain)
MH  - *Computer-Aided Design
MH  - Crowns
MH  - *Dental Marginal Adaptation
MH  - Dental Porcelain
MH  - *Dental Prosthesis Design
MH  - Humans
MH  - Models, Dental
MH  - Surface Properties
EDAT- 2016/07/06 06:00
MHDA- 2018/03/24 06:00
CRDT- 2016/07/06 06:00
PHST- 2016/07/06 06:00 [pubmed]
PHST- 2018/03/24 06:00 [medline]
PHST- 2016/07/06 06:00 [entrez]
AID - 10.2341/15-146-L [doi]
PST - ppublish
SO  - Oper Dent. 2016 Nov/Dec;41(6):607-616. doi: 10.2341/15-146-L. Epub 2016 Jul 5.