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Article
Determination of Implant Primary Stability: A Comparison of the Surgeon’s Tactile Sense and Objective Measurements

Authors: Bakir Ghanim Murrad بكر غانم مراد --- Jamal Abid Mohammed جمال عبد محمد
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2017 Volume: 29 Issue: 4 Pages: 65-71
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Evaluation and measurement of primary stability could be achieved by several methods, including the resonance frequency analysis (RFA) and implant insertion torque (IT) values. The need for a sufficient primary stability, guaranteed by an adequate insertion torque and implant stability quotient values, increased its importance mainly in one stage implants or in immediate loading protocols. The aims of this study was to find if there is a correlation between the peak insertion torque (PIT) and ISQ values of implants inserted in the jaws of different bone quality which regarded as two important clinical determinant factors for prediction of implant primary stability, and to evaluate and compare whether an experienced clinician could precisely predict the primary stability of an implant on insertion with different surgical procedures using his own tactile perception.Materials and methods: A total of (60) Iraqi adult patients, (28) males and (32) females, age ranged (22-66) years old were enrolled in this clinical prospective study. The maximum torque value recorded on implant insertion using calibrated manual torque ratchet adopting three categories: low (10 to 30 N/cm), medium (30 to 50 N/cm), and high insertion torque (50 to 70 N/cm). The oral surgeon was asked to indicate the perceived ISQs values according to his perception then Implant stability quotient were measured by Osstell ™. Bone density (type) was determined according to subjective bone resistance encountered while drilling as proposed by Lekohlm and Zarb.Results: A total of 160 implants were inserted. The mean peak IT value was 49 ± 2.61N/cm. The mean ISQ value was 71.7 ± 8.86. Statistical analysis show a significant correlation between ISQ values and PIT values (P<0.001) , between IT values and bone types and between perceived primary stability and actual primary stability (P<0.001) .Conclusions:The corresponding significant correlations between insertion torque, and ISQ values may help clinicians to predict primary stability on implant insertion, that may be associated with implant survival and success rates. A moderate reliability (correlation) between perceived ISQ values and those measured using RF analyzer(Ossttel device).


Article
Pre-implant computed tomography and insertion torque measurement in qualitative determination of trabecular bone density

Authors: Mahmood J. Hamzah محمود حمزة --- Jamal A. Al-Taei جمال الطائي
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: 2 Pages: 56-61
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Bone density is a very important factor in the successful plan of implant treatment. The aim of the studyis to evaluate the trabecular bone density of potential dental implant sites in different region of the jawbone by usingComputerized Tomography (CT) , and the relationship between bone density and insertion torque.Materials and method: In this clinical study 64 patients were treated with 120 Xive FRIADENT DENTPLY system implants.The implant recipient sites were divided in two groups according to gender; 60 in males and 60 in females and eachgroup was divided into subgroups according jaw (maxilla and mandible) and region (anterior and posterior). Thebone density of each implant recipient site was recorded in Hounsfield units (HU) using CT. The maximum insertiontorque (Ncm) values were recorded with torque controlling motor.Results: There was a significant correlation between bone density and insertion torque in males (r=0. 983, p <0.001)and females (r=0.955, p <0.001).The trabecular bone density values were (682±98 HU, 481±104 HU, 413±92 HU, and263±67 HU) values in the anterior mandible, posterior mandible, anterior maxilla, and posterior maxilla, respectively.Trabecular bone density was higher in males in comparison to females and the bone quality was higher for themandible than for the maxilla, and higher for the anterior region than for the posterior region of these bones. Infemales there is no significant difference in bone density (p<0.05) between the posterior mandible and anteriormaxilla and between males and females at posterior maxilla (p<0.001).Conclusion: Trabecular bone density is a key determinant for clinical success; CT is a useful tool for assessing thebone density

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