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Article
Comparison Study for the Quantity of Titanium Exist in Different Type of Dental Implant Alloy

Author: Jameel MA Sulaiman
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2013 Volume: 13 Issue: 23 Pages: 560-565
Publisher: Mosul University جامعة الموصل

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Abstract

The current study aims to compare alloys of dental implants and to find the ratio of titanium element (Ti) with different origins which are used by dentists in dental implant to restore the missing teeth. Materials and Methods: Three types of dental implants from Germany, Italy and Korea used in this study for statement the chemical structure of these alloys using (XRD: X-Ray Diffraction) (Model S1TurboSD LECE, BRUKER). Hardness, tensile strength, and flexibility coefficient tested by hardness measuring device Micro Hardness – AMSLER, Germany, 1978. The microstructure of samples obtained by Metrology Microscope (600X), ME-3125, UNION, 1978, Japan. Results: Different elements appeared in each alloy, and the titanium (Ti) ratio was the main one, where the Germany type (95.14%), Italy, (91.21%), while Korea type was the highest (95.21%). Tension Resistance in Germany model (755) N/(mm)2, Italian (781) N/(mm)2, and Germany (785) N/(mm)2. Hardness Vickers (HV) in Germany (277), Italy (285) and for Korean type (287). Modulus of elasticity, in Germany (107) Gpa, in Italy (115) Gpa. and in Korean (107) Gpa. The classification according to the American Society for Testing and Materials found in Germany Ti 3-2.5, Italy Ti6-2-1-1, and in Korean Ti 3-2.5. Conclusions: The Korean sample is best for three reasons the quantity of Titanium, Hardness Vickers (VH) and Tension Resistance are more. The Italy type is found better for Modulus Elasticity, while the Germany type is better in Microstructure. In general, and since, the three types have more than (90%) of Titanium there for all the types of dental implant are good against corrosion from acid and Hydrofluoric (HF).

Keywords

Dental Implant --- Titanium --- Alloy


Article
Intentional penetration of dental implants into the maxillary sinus: a retrospective study
الاختراق المتعمد لزراعة الأسنان في الجيب الفكي العلوي: دراسة بأثر رجعي

Author: Omed Ikram Shihab
Journal: Zanco Journal of Medical Sciences مجلة زانكو للعلوم الطبية ISSN: 19955588/19955596 Year: 2017 Volume: 21 Issue: 1 Pages: 1536-1539
Publisher: Hawler Medical Univeristy جامعة هولير الطبية

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Abstract

Background and objective: Perforation of the maxillary sinus by a dental implant isan issue of concern by many dental implant clinicians. This study aimed to assess thesuccess rate and consequences of dental implants emerging into the maxillary sinus.Methods: The maxillary sinus was intentionally perforated for dental implant placementin 35 patients with reduced posterior maxillary bone height (4 mm or more). A total of 70implants engaged bicortically and emerged into the sinus. Nineteen female and 16 malepatients were involved in the study. The patients were followed up for sinus complicationsand dental implant success.Results: From the total, only two implants were failed; one during gingival formerplacement and the other after loading by one year. No patient presented with sinusitisclinically and radiographically. Three patients developed epistaxis just on the day ofsurgery and became well after on.Conclusion: Within the limits of this study, dental implant emergence into healthymaxillary sinus is considered a safe and successful procedure.


Article
Osseointegration of dental implants without primary stability: an experimental study in sheep
Osseointegration من زراعة الأسنان دون الاستقرار الأولي: دراسة تجريبية في الأغنام

Authors: Ahmed A. Haider --- Othman A. Omer --- Hozak Zahir Ali --- Abduljaleel Azad Samad --- et al.
Journal: Zanco Journal of Medical Sciences مجلة زانكو للعلوم الطبية ISSN: 19955588/19955596 Year: 2017 Volume: 21 Issue: 1 Pages: 1616-1618
Publisher: Hawler Medical Univeristy جامعة هولير الطبية

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Abstract

Background and objective: Primary implant stability is considered necessary forachieving and maintaining osseointegration. This experimental study aimed to evaluate theoutcome of implants without primary stability, clinically and radiographically.Methods: Two adult sheep (3-4 years of age), 70 kg in weight, were included in the study.After sedation and local anesthesia, the lateral side of the basal bone of mandible isexposed by a single long incision. The implant bed performed in the inferior border of thebasal bone of mandible drilling to 5 mm in diameter and 10 mm in length. Five implantswere inserted into the basal bone of mandible for each side (right and left), but the sizes ofinserted implant was 3.8 mm in diameter and 10 mm in length, after 4 months the 2 sheepwere sacrificed and the universal torque ratchet was used to measure the stability of theimplant by a counter torque 30 N/cm test. Cone Beam Tomography (CBCT) was used toevaluate the implants radiographically.Results: Nineteen (from 20) implants successfully tolerated a 30 N/cm countertorque testcomprising (95%). Only one implant failed to osseointegrate (5%). During the healingperiod, no any adverse clinical signs reported.Conclusion: Dental implants may have a chance to osseointegrate even in the lack ofprimary stability.


Article
CRESTAL BONE LOSS AROUND DENTAL IMPLANT "COMPUTERIZED ANALYSIS"

Authors: Dr. Afya Sahib Diab B.D.S, M.Sc. د. افياء صاحب --- Prof. Dr. Khalid Yousif Igzeer B.D.S. M.Sc. F.F.D.R.C.S.I. د. خالد يوسف
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2006 Volume: 3 Issue: 3 Pages: 244-254
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

The present study evaluates crestal bone loss around dental implants(retrospectively and prospectively) and determines the prognosis of dental implantthrough bone level estimation. Bone level was measured around 354 implants in 88patients retrospectively and 97 implants in 31 patients prospectively, digitalpanoramic radiograph were taken during recall appointments, and analysis with acomputer software associated method to measure the actual bone loss in mesial anddistal side of the implant during these periods.Over all, the studied implants, experienced most of its crestal bone loss during thepreloading period, followed by dramatic decrease in bone loss rate through thesubsequent study intervals. The result of the present study showed that there issignificant positive correlation between crestal bone loss and age, female showedsignificantly higher amount of bone loss than male in stage-1, while the appositefigure found in stage-2. Data analysis during preloading time indicates significantbone loss with implant location, while highly significant bone loss had been detectedwith maxillary arch, fine trabecular bone density, immediate implant, completeedentulous cases, While implant length, implant diameter and implant stability had anon significant effects on crestal bone loss.


Article
Amount of bone loss after maxillary dental implant loading in smoker and non-smoker patients

Author: Taha Y. Hamad طه حمد
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: 1 Pages: 76-81
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Excessive crestal bone loss after dental implant occurs due to many factors among which, is smoking.This study was conducted to evaluate the effect and role of smoking in breakdown of bone around dental implantand the possibility to be a factor of its failure.Method: Forty implants had been inserted in anterior and bicuspid region of upper arch of 40 systemically healthymale subjects, 20 were smokers and the other 20 subjects were non smokers. After loading the prosthesis, all subjectswere followed by clinical (checking for any mobility or gingival change) and radiographic examination for twosuccessive 6 months periods (the overall follow up period was 1 year). Mesial and distal bone levels were measuredby digitized x ray each six months in both smokers and non smokers. All measurements were recorded for eachpatient and a comparison of marginal bone level was done.Results: A marked excessive marginal bone loss was found at mesial side of smokers, mean (1.18± 0.033) mm after 6months of loading and mean of (1.52 ± 0.052) mm after 1 year, while in non smoker group, the mean of mesial boneloss after 6 months was (0.85 ± 0.026) mm and (1.12 ± 0.031) mm after 1 year. The mean distal bone loss in smokers atthe two periods was (1.23 ± 0.04) mm and (1.59 ± 0.046) mm, while in non smokers, the mean distal bone loss was(0.87 ± 0.023) mm and (1.1 ± 0.029) mm respectively. Differences in all measurements were significant P < 0.001.Conclusion: Smoking could be a factor results in future implant failure


Article
Localization of transforming growth factor-beta expression in the peri-implant tissues of dental implants coated with placental collagen

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Abstract

Back ground : The transforming growth factor beta (TGFB) signaling pathway is involved in many cellular processes inboth the adult organism and the developing embryo including cell growth, cell differentiation, apoptosis. Theinteraction between implant material and surrounding tissues is believed to play a fundamental role in implantsuccess and illustrates different expression of growth factors by different cells that involved in the formation of periimplanttissue.The aim of this study was to localize expression of TGF B by newly formed bone tissue around surface-conditionedimplants with placental collagen at different time intervals: 3 ,7,14,28, and 56 days .Materials and Methods: Commercially pure Titanium (CPTi) implants coated with collagen protein were placed in thetibia of 20 new Zealand rabbits . Immunohistochemical study for localization of TGF B in peri –implant tissue for intervalperiods 3 ,7,14,28, and 56 days was performed under light microscope..Results: Positive expression of Transforming growth factor B can be detected in osteoblast, osteocyte, newlydeposited matrix includes collagenous tissue and non mineralized osteoid tissue. Endothelial cells line blood vesselshowed positivity too. Minerlized bone trabeculae and mature bone illustrate negative expression.Conclusion: The present study suggests that placental collagen, coated Ti implant illustrates positive expression oftransforming growth factor B by osteoblast and endothelial cell that enhanced bone formation


Article
Expression of matrix metalloproteinase-2 in the extracellular matrix of osseointegrated and diseased implants

Author: Ghada I. Al-Duboni
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2013 Volume: 25 Issue: 3 Pages: 176-182
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Recently with improvement of dental implantology science, osseointegrated implants show aconsiderable durability, however; failures are not completely avoidable. Matrix metalloproteinase-2 (MMP-2)expression is disturbed in many pathological conditions such as peri-implantitis and periodontitis. This study wascarried out to investigate the tissue expression of MMP-2 in the extracellular matrix of osseointegrated and diseasedimplants.Subjects and methods: Gingival biopsies were collected from six patients having osseointegrated or workingimplants and twenty with diseased or non osseointegrated implants and (6) controls having no implants. In situhybridization technique was used to analyze the changes in immunoreactivity of ECM-controlling MMP-2.Results: The findings of the present study indicate that the expression of MMP2 was significantly elevated in failedimplants versus healthy implants (P<0.01). In addition, MMP-2 was detected in peri-implant sites with ongoing boneloss, cavitations and inflammatory reaction.Conclusion: The in situ hybridization technique, showed clear evidence that MMP-2, which is involved in the processof osseointegration and bone remodeling, increase greatly in the presence of bone destruction, cavitations, severeinflammation and fibrous tissue formation. The data link titanium- induced bone remodeling to changes in expressionand distribution of MMP-2.


Article
Evaluation of Immediate post-extraction implants of 34 patients in Basrah province.

Author: Dr. Riad G. Altaee F.I.C.M.S * د. رياض الطائي
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2013 Volume: 10 Issue: 1 Pages: 98-105
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

The aim of this study was to evaluate the success rate of the immediate postextractionimplants without incision or primary flap closure.Patients and Methods: The study included 34 patients in good general health,referred to the department of oral surgery in the specialized center of dentistry inBasra between August 2009 and July 2010, immediate post extraction implanttreatment 20(58.82 % ) female and 14(41.18%)male, aged 22 to 53 years withmean age 32.85 . Each patient had a tooth that required extraction, and each had atleast 4 mm of bone beyond the root apex. After tooth extraction, the implants wereimmediately placed without incision or flap elevation. Implant sites showing bonebone defects or bone fenestrations, were excluded from this study. The secondstagesurgical procedure was performed4 months after the first procedure. Thefollowing clinical parameters were evaluated at the time of implant placement andat second stage surgery: peri-implant radiolucency and marginal bone loss, whichwere evaluated radiographically.Results: The postsurgical healing period was uneventful for all patients. Soft tissueclosure over the implant sites was achieved in1to 3 weeks after surgery at all sites.At second stage surgery, no peri-implant bone defects were observed or detectedby probing. The soft tissue anatomy was considered clinically acceptable in allpatients.Conclusions: Immediate post-extraction implant treatment is an implant alternativewith a survival rate similar to that of the conventional technique for implantplacement and enables preserving both the bone structure and gingivalarchitecture.


Article
The initial stability of dental implant with horizontal plate (An in vitro study)

Authors: Yaseen H. Motea ياسين حسن مطيع --- Basima M.A. Hussein
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2014 Volume: 26 Issue: 4 Pages: 95-101
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: The Initial (primary) stability is one of the factors that play an important role in the success of the dentalimplants. The purpose of this study was to evaluate the initial stability of dental implant with horizontal plate by usingfive analytical tests: insertion torque, removal torque, resonance frequency analysis, push-in test and pull-out test.Materials and methods: Two different lengths of dental implants (5mm and 10mm) were tested in this study; eachdental implant was 4mm in diameter with a square threads shape of 1mm pitch and 0.5mm depth. The crestal areawas 4.2mm diameter contained a right angle margin circumferential ring while the apical area was tapered withtwo self-tapping grooves. In this study, the initial stability of dental implants’ design was compared with initial stabilityof dental implants of the same dimensions and design that engage horizontal plates of 1.5mm thickness at theapical part. All dental implants were implanted into a solid rigid polyurethane foam blocks (artificial bone) of0.48g/cm3 density and tested by the five initial stability tests. Each test was done with forty samples (twenty samplesof 5mm length and twenty samples of 10mm length).Results: The statistical analysis was performed and the result showed that there was very highly significant differencebetween dental implants with the horizontal plates and dental implants without the horizontal plates of both 5mmand 10 mm lengths in four initial stability tests which were insertion torque, removal torque, push-in test and pull-outtest. The statistical analysis of the resonance frequency analysis showed that there was non-significant differencebetween dental implants with the horizontal plates and dental implants without the horizontal plates of both lengths.Conclusion: These results implied that the dental implants with the horizontal plates had better primary stabilitycompared with the dental implants without the horizontal plates confirming that the horizontal plates enhanced theprimary stability of the dental implants


Article
Effect of Zinc on Antibacterial Action of Bioactive Glass Coating for Dental Implant

Authors: Ahmed Salah Hameed --- Ahmed Muhammed Abass --- Luma Jasim Hamood --- Israa Abass Obaid
Journal: Medical Journal of Babylon مجلة بابل الطبية ISSN: 1812156X 23126760 Year: 2015 Volume: 12 Issue: 3 Pages: 612-617
Publisher: Babylon University جامعة بابل

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Abstract

Peri-implantitis is one of the causes of implant failure. Attempts have been done to coat dental implant with bioactive glasses to enhance osseo-integration and reduce microbial attachment. However, the anti-bacterial action of these coatings was limited to certain bacterial strains . Metals such as zinc and silver have been added to these glasses to improve their anti-microbial action.In this study zinc (3 mole%)-containing and zinc-free bioactive glasses were synthesized using melt-derived route. The glass coatings on titanium discs were prepared using enameling technique. The antibacterial action of zinc-containing and zinc-free glass coatings was studied against Streptococcusmutants, Staphylococcus aureus and Porphyromonasgingivalis by disc diffusion method. These bacterial strains were obtained by swab samples. The results showed that zinc at 3 mole% had no effect on antibacterial action of bioactive glasses and both glass coatings exhibited similar effect on bacterial strains used in this study. Since these glass coatings have similar effect on aerobic and anaerobic bacteria, these glass coatings can be used in various medical applications.

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