PMID- 25023010
OWN - NLM
STAT- MEDLINE
DCOM- 20160202
LR  - 20220311
IS  - 1097-6841 (Electronic)
IS  - 0022-3913 (Linking)
VI  - 112
IP  - 6
DP  - 2014 Dec
TI  - Trend of change in retentive force for bar attachments with different materials.
PG  - 1545-52
LID - S0022-3913(14)00285-6 [pii]
LID - 10.1016/j.prosdent.2013.10.029 [doi]
AB  - STATEMENT OF PROBLEM: Attachment wear can decrease the retentive force of 
      2-implant overdentures (2-IODs). PURPOSE: The purpose of this in vitro study was 
      to investigate the trend of change in retentive force for 6 different bar 
      attachments during dislodgement. MATERIAL AND METHODS: Round and Dolder bars were 
      made of platinum-added gold alloy (PGA), cobalt chromium alloy (Co-Cr), and 
      commercially pure titanium grade IV (Ti). Clips were made of PGA. Retentive force 
      was measured during 7200 dislodging cycles. Simple linear regression analysis was 
      performed in order to investigate the relationship between number of cycles and 
      retentive force (P<.05). Subsequently, wear debris was analyzed, and the surface 
      of the attachments was observed. RESULTS: The retentive force of the Co-Cr round 
      bar attachment (CoCr-R) increased from 57.5 N to 68.3 N and the Ti round bar 
      attachment (Ti-R) from 54.8 N to 59.7 N. However, the retentive force of the PGA 
      round bar attachment (PGA-R) decreased from 69.3 N to 64.0 N. A positive 
      relationship was found between the number of cycles and the retentive force of 
      both CoCr-R and Ti-R. The composition of the wear debris was almost the same as 
      for PGA. For the Dolder bar attachment, no changes were seen in retentive force 
      (between 7.0 N to 12.0 N). CONCLUSIONS: For the round bar attachment, the PGA 
      clip and PGA bar showed wear. The retentive force of PGA-R slightly decreased. 
      The retentive force of CoCr-R and Ti-R tended to increase. For the Dolder bar 
      attachment, all 3 types of bar attachment showed no wear.
CI  - Copyright (c) 2014 Editorial Council for the Journal of Prosthetic Dentistry. 
      Published by Elsevier Inc. All rights reserved.
FAU - Saito, Marie
AU  - Saito M
AD  - Graduate student, Complete Denture Prosthodontics, Graduate School of Medical and 
      Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
FAU - Kanazawa, Manabu
AU  - Kanazawa M
AD  - Assistant Professor, Complete Denture Prosthodontics, Graduate School of Medical 
      and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan. 
      Electronic address: m.kanazawa.gerd@tmd.ac.jp.
FAU - Takahashi, Hidekazu
AU  - Takahashi H
AD  - Professor, Oral Biomaterials Engineering, School of Oral Health Care Sciences 
      Course for Oral Health Engineering, Graduate School of Medical and Dental 
      Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
FAU - Uo, Motohiro
AU  - Uo M
AD  - Professor, Advanced Biomaterials, Graduate School of Medical and Dental Sciences, 
      Tokyo Medical and Dental University, Tokyo, Japan.
FAU - Minakuchi, Shunsuke
AU  - Minakuchi S
AD  - Professor, Complete Denture Prosthodontics, Graduate School of Medical and Dental 
      Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20140711
PL  - United States
TA  - J Prosthet Dent
JT  - The Journal of prosthetic dentistry
JID - 0376364
RN  - 0 (Chromium Alloys)
RN  - 0 (Dental Materials)
RN  - 0 (Gold Alloys)
RN  - 0R0008Q3JB (Chromium)
RN  - 3G0H8C9362 (Cobalt)
RN  - 3M4G523W1G (Silver)
RN  - 49DFR088MY (Platinum)
RN  - 5TWQ1V240M (Palladium)
RN  - 7440-57-5 (Gold)
RN  - 789U1901C5 (Copper)
RN  - D1JT611TNE (Titanium)
RN  - J41CSQ7QDS (Zinc)
SB  - IM
MH  - Chromium/analysis
MH  - Chromium Alloys/chemistry
MH  - Cobalt/analysis
MH  - Computer-Aided Design
MH  - Copper/analysis
MH  - Dental Materials/*chemistry
MH  - *Dental Prosthesis, Implant-Supported
MH  - Dental Restoration Wear
MH  - *Denture Design
MH  - Denture Retention/*instrumentation
MH  - *Denture, Overlay
MH  - Gold/analysis
MH  - Gold Alloys/chemistry
MH  - Humans
MH  - Materials Testing
MH  - Microscopy, Electron, Scanning
MH  - Palladium/analysis
MH  - Platinum/analysis/chemistry
MH  - Silver/analysis
MH  - Spectrometry, X-Ray Emission
MH  - Stress, Mechanical
MH  - Surface Properties
MH  - Titanium/analysis/chemistry
MH  - Zinc/analysis
EDAT- 2014/07/16 06:00
MHDA- 2016/02/03 06:00
CRDT- 2014/07/16 06:00
PHST- 2013/01/08 00:00 [received]
PHST- 2013/10/08 00:00 [revised]
PHST- 2013/10/18 00:00 [accepted]
PHST- 2014/07/16 06:00 [entrez]
PHST- 2014/07/16 06:00 [pubmed]
PHST- 2016/02/03 06:00 [medline]
AID - S0022-3913(14)00285-6 [pii]
AID - 10.1016/j.prosdent.2013.10.029 [doi]
PST - ppublish
SO  - J Prosthet Dent. 2014 Dec;112(6):1545-52. doi: 10.1016/j.prosdent.2013.10.029. 
      Epub 2014 Jul 11.