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Register a new userEvaluation of the Color Digital Subtraction Technique in Assessing Peri-Implant Bone Changes in Dental X-Ray Imaging
تقييم تقنية الطرح اللوني للصور الشعاعية في دراسة التغيرات العظمية حول الزرعات السنية
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Damascus University ورقة بحثية
Publication date
2011
fields
Dentistry
and research's language is
العربية
Authors
إياد الحفار( باحث )
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Shamra Editor
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هدفت هذه الدراسة إلى تطبيق خوارزمية الترميز اللوني في تقنية الطرح اللوني للصور الشعاعية الذروية الرقمية لتقييم قدرتها في إظهار التغيرات العظمية الكمية و النوعية بشكل لوني حول الزرعات السنية.
To report the results of evaluation of the color digital subtraction technique in assessing quality and quantity peri-implant bone changes in dental x-ray imaging.
References used
Kyong Bae H , Chung M, Cha I, Han D. Marginal tissue response to different implant neck design. J Korean Acad Prosthodont 2008; 46(6): 602-609
Roos J, Sennerby L, Lekholm U, Jemt T, Grondahl K,Albrektsson T. A qualitative and quantitative method for evaluating implant success: a 5-year retrospective analysis of the Brånemark implant. Int J OralMaxillofac Implants 1997;12:504–514
Scarano A, Assenza B, Piattelli M, Thams U, Roman F, Favero G, et al. Interimplant distance and crestal bone resorption: A histologic study in the canine mandible . Clin Implant Dent Relat Res 2004; 6( 3):150-6
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Background& Objective: The reduction of alveolar crestal bone density is one of the earlier signs of periimplant
disease and precedes the loss of height of the alveolar crest, because of that early detection of the
small changes in density is impor
tant and lead to the early onset of treatment and increases its success's
percentage.
This study aimed to evaluate the ability of the direct conventional digital method in detection of density
changes around dental implants by the mean value of the gray level of the histogram of the selected area
comparing with radiographic subtraction method.
Existing bone loss still remains an important challenge when implant placement
is required to rehabilitate the compromised site. A new way to place dental implants in cases of alveolar
atrophy, described in some articles, is the ridge-splitting tec
hnique, which allows the ridge to be widened
by a less invasive procedure than the traditional grafting approaches. The aim of this study is to evaluate
the efficiency of this technique in bone augmentation, evaluate the relationship between peri-implant
alveolar bone loss after Use of the Bone Splitting Technique, and to study the alveolar ridge width before
and after split.
Objective: The purpose of this randomized، double-blind،controled trial was to
evaluate the clinical and radiographic effects of 0.12% chlorhexidine digluconate gel on
peri-implant (hard and soft tissues surrounding the implant) maintenance.
Mater
ial and methods: Forty patients (80 implants) who received two implants at
least were randomly assigned to two groups: 0.12% chlorhexidine digluconate gel as test
group، and placebo without CHX as control group. Clinical and radiographic parameters
were recorded at day 10، month 2، 4، and 6.
Results: All clinical parameters except PPD showed better results in test group which
had statistically significant reductions (P< 0.05) in modified plaque index، modified
gingival index، modified bleeding index and attachment level compared to the placebo
group. There were no significant differences between groups in probing pocket depth or
radiographic parameter.
Conclusions: The results of this clinical study indicate that twice daily use of 0.12%
chlorhexidine digluconate gel may enhance the peri-implant maintenance.
Preserving the bone surrounding the implant is one of the most important factors in the success and durability of this implant, and the change in the quantity and quality of the surrounding bone not only affects the bone fusion of it, but also causes a change in the shape of the soft tissues covering and thus affects the aesthetic and functional aspect of the treatment.
Soft laser applications continue to improve local bone mineral density which is considered the most important factor in dental implant success.
This study aims to evaluate the Trabecular to Cortical bone ratio (TCr) index -as a simple easy measureme
nt index- that expresses the bone mineral density. This is to be able to predict the success of dental implants.
The study included 40 patients, who had a single implant in the lower molar region. The patients are divided into two groups: 20 patients had an implant with a soft laser application, i.e. GaAlAs laser (wavelength 830 nm), and 20 patients had an implant without a soft laser application.
Ordinary Analog periapical radiographs were used with calibration Stepwedge of pure aluminum, a medical Dijora program was used to measure radiographically local bone density in the periapical radiographs, and a panoramic Tomography was made to study TCr and two bone density indices (thickness ratio x density ratio) and (equivalent Aluminium thickness). All were measured during the period before implantation and 3, 6, and 9 months after the implantation.
The study found a strong linear correlation between the TCr and (thickness ratio x density ratio) 0.001>P, R2= 0.842 36(r = 0.8. and equivalent Aluminium thickness(
0.001> P, R2 = 0.656735, (r = 0.8).
The study shows that TCr index expresses both radiographic indices which reflect the local bone density, which means that the TCr is associated with such density. Therefore, it can be used as an easy way to predict the quality of bone, and prognosticate the success of dental implants.
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