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论文研究 - 不同条件下多个种植体基台印象的摄影测量分析
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目的:这项研究的目的是评估和比较亲水聚硅氧烷,乙烯基聚硅氧烷和聚醚(PE)印模材料在干燥,潮湿和潮湿条件下的尺寸精度。 方法:形成了包括6个植入物的丙烯酸类模型,共制作了108个印模。 在这项研究中,测试了亲水性聚硅氧烷印模材料,1种亲水性乙烯基聚硅氧烷印模材料和1种聚醚印模材料。 每种材料分别在干燥,潮湿和潮湿下产生十二个印象。 通过使用图形编辑程序在每个研究模型上评估了两个参考距离,而为了比较平均尺寸变化,使用了单向方差分析和Student t检验。 结果:方差的单向分析显示,印模材料和条件之间存在显着差异(P <0.05)。 湿润和干燥湿润条件之间存在统计学上的显着差异(P <0.05)。 最好的结果是在干燥条件下使用聚醚压印材料(平均差0.15毫米)。 结论:所有印模材料在干燥,潮湿和潮湿条件下均显示出统计学上的显着差异。
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Open Journal of Stomatology, 2017, 7, 408-418
http://www.scirp.org/journal/ojst
ISSN Online: 2160-8717
ISSN Print: 2160-8709
DOI:
10.4236/ojst.2017.79035 Sep. 8, 2017 408
Open Journal of Stomatology
Photogrammetric Analysis of Multiple Implant
Abutment Impressions under Different
Conditions
Funda Bayındır
1
, Melike Pınar Yıldırım
2
, Nuran Dinçkal Yanikoğlu
1*
1
Department of Prosthodontics, Faculty of Dentistry, Atatürk University, Erzurum, Turkey
2
Beyhekim Oral and Dental Healthy Center, Selçuklu, Turkey
Abstract
Purpose:
The aim of this investigation was to evaluate and compare the d
i-
mensional accuracy of hydrophilic polysiloxane, vinyl polysiloxane (VPS)
,
and polyether (PE) impression materials under dry, moist and wet cond
i-
tions.
Methods:
An acrylic master model including 6 implants was formed
,
and 108 im
pressions were made up of this acrylic model at total. In this
study, the materials of hydrophilic polysiloxane impression material, 1 h
y-
drophilic vinyl polysiloxane impression material an
d 1 polyether impression
material were tested. Twelve impression of each material were created under
dry, moist and wet re
spectively. Two reference distances were evaluated on
each study model by using a graphics-editing program whereas for compa
r-
ison of mean dimensional changes one-
way analysis of variance and Student
t-test were used.
Results:
One-way analysis of variance revealed signifi
cant
differences between impression materials and conditions (
P
<
0.05). There
was a statistically significant difference between wet and dry-moist cond
i-
tions (
P
<
0.05). The best result is with polyether impression material under
dry condition (0.15 mm-mean difference).
Conclusions: All impression
materials showed a statistically significant difference under dry, moist an
d
wet conditions.
Keywords
Photogrammetric Analysis, Implant Abutment, Impressions
1. Introduction
A dental impression which is a negative impression of an oral structure is used
to produce a positive replica of the structure to be used as a permanent record or
How to cite this paper: Bayındır, F.,
Yıldırım
, M.P., and Yanikoğlu, N.D. (2017
)
Photogrammetric
Analysis of Multiple I
m-
plant Abutment Impressions under Different
Conditions.
Open Journal of Stomatology
,
7,
408
-418.
https://doi.org/10.4236/ojst.2017.79035
Received:
July 11, 2017
Accepted:
September 5, 2017
Published:
September 8, 2017
Copyright © 201
7 by authors and
Scientific
Research Publishing Inc.
This work is licensed under the Creative
Commons Attribution International
License (CC BY
4.0).
http://creativecommons.org/licenses/by/4.0/
Open Access
F. Bayındır et al.
DOI:
10.4236/ojst.2017.79035 409 Open
Journal of Stomatology
in the production of a dental restoration or prosthesis [1]. The accuracy of the
definitive cast is affected by the accuracy of impression so that an accurate im-
pression is necessary for the fabrication of good-fit prosthesis. On contrary, an
inaccurate impression may cause misfit in prosthesis, which may further result
in mechanical and/or biological complications [2]-[41]. The possible mechanical
complications due to misfits in prosthesis can be observed as screw loosening,
screw fracture, implant fracture, and occlusal inaccuracy [2].
The internal stresses in the FPD (fixed partial denture), the implants, and
the bone matrix are possibly induced by any visible or invisible misalignment
of the FPD to the osseointegrated implants [8] [9]. Physiologic loads imposed
on an endosteal implant are distributed by the implant itself to the surround-
ing supporting tissues [10]. Implant units, unlike natural teeth cushioned in
their alveoli by periodontal fibers, are not able to show tolerance to movement
while adapting to the demands of the metal supporting structure. The little
mobility of osseointegrated implants is due to the “elasticity” of the investing
bone [11].
Nowadays, the most popular and accepted material can be determined as
elastomeric impression material among dentists. Due to this, it is very important
to investigate the accuracy and stability for the comparison of this group of re-
cently developed commercial products.
The system of science of data and measurements from photographs and sens-
ing can be defined as photogrammetry which has the concept of obtaining relia-
ble metric information from photographs. The photogrammetry method extends
the two-dimensional information provided by photos into three dimensions; by
using various cameras, the shape of each of the photographic objects and their
location in space are rebuilt regarding to an external system of reference points.
The necessary calculations for reconstruction require special cameras qualified
to identify this system of reference points. Photogrammetry has been used in
many areas of medicine [42] [43] and in dentistry; photography has been a re-
quired technique to study the shapes and positions of teeth, dental arches and
maxillary and mandibular bones. This technique enables the three-dimensional
analysis of the palate variations while practicing rapid palatal expansion tech-
niques and evaluating the achieved dental movement in the area of orthodontics.
Recently, this technique has been applied in dental implants surgery planning
and
in vitro
research to test the reliability of other impression techniques that
has also been reported [44]-[49].
This study has purposed to evaluate polysiloxane, vinyl polysiloxane and po-
lyether impression materials that polymerize under dry, moist, and wet condi-
tions by using photogrammetric analysis. The dimensional accuracy was eva-
luated on stone models made by different impression materials exposed to three
different conditions.
The hypotheses of this study were that moist and wet conditions affect the
impression materials unfavorably in terms of their dimensional accuracy.
F. Bayındır et al.
DOI:
10.4236/ojst.2017.79035 410
Open Journal of Stomatology
2. Material and Methods
2.1. Subjects and Setting
By placing an acrylic master model with 6 implants (Tidal Spiral Dental Implant
Systems, Huntsville, AL, USA); in bilateral position to place of the maxillary
right and left canine, the construction of second premolar and second molar was
performed (
Figure 1).
In this study, a hydrophilic polysiloxane impression material (Zetaflow, Lot
No. 129666, Zhermack, Italy), a hydrophilic vinyl polysiloxane (VPS) impression
material (Elite P & P, Lot No. 130025, Zhermack, Italy) and a polyether impres-
sion material (Impregum Penta Soft Quick, Lot No.483250, 3 M ESPE, Germa-
ny) (
Figure 2) were used.
Before making impression, the acrylic model was ultrasonically cleaned to
make sure no residue was left and then it was allowed to air dry. Precaution was
taken and care was shown to prevent possible contamination on the surface of
the model impressions. Latex gloves were not worn while materials were applied
due to their potential inhibitory effect on polymerization of VPS materials [12].
The cartridge was bled according to manufacturer’s suggestions to obtain proper
dispensing ratios.
Twelve impressions of each material were formed under each of the three
conditions: dry, moist, and wet. After 24 hours following the process of making
each impression, two reference distances were measured by using a graph-
ics-editing program for dimensional accuracy evaluation. Photogrammetry has
the concept of obtaining reliable metric information from photographs. (Adobe
Photoshop CS4, Adobe Systems Inc., San Jose, CA, USA).
For the impressions exposed to moist conditions, a spray bottle of fine mist of
Figure 1. Acrylic master model.
Figure 2. (a) Hydrophilic polysiloxane impression, (b) Hydrophilic vinyl polysiloxane
impression, (c) Polyether impression.
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