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Journal of Dental Research, Dental Clinics, Dental prospects، جلد ۹، شماره ۴، صفحات ۲۴۶-۲۵۳
عنوان فارسی
چکیده فارسی مقاله
کلیدواژه‌های فارسی مقاله
عنوان انگلیسی The comparison of stress distribution with different implant numbers and inclination angles in all-on-four and conventional methods in maxilla: a finite element analysis
چکیده انگلیسی مقاله Background and aims. All-on-four technique involves the use of tilted implants to allow for shorter cantilevers. This finite element analysis aimed at investigating the amount and distribution of stress in maxillary bone surrounding the implants with all-on-four vs. frequently used method with six implants technique using different numbers and inclination angles. Materials and methods. A 3D edentulous maxillary model was created and implants were virtually placed anterior to the maxillary sinus and splinted with a superstructure. In total, five models were designed. In the first to the fourth models, four implants were placed with distal implants inclined 0, 15, 30, and 45 degrees, respectively. In the fifth model, six vertical implants were placed. 100 N loading was placed in the left most distal region of the superstructure. Maximum von Mises stress values were evaluated in cancellous and cortical bone. Results. The maximum stress values recorded in cancellous and cortical bone were 7.15 MPa and 51.69 MPa, respectively (model I). The reduction in stress values in models II to V 6%, 18%, 54%, and 24% in cancellous bone and 12%, 36%, 62%, and 62% in cortical bone, respectively. Conclusion. Increasing the inclination in posterior implants resulted in reduction of cantilever length and maximum stress decline in both cancellous and cortical bone. The effect of cantilever length seems to be a dominant factor which can diminish stress even with less number of implants.
کلیدواژه‌های انگلیسی مقاله Dental implant,finite element analysis,maxilla
نویسندگان مقاله فریبا صالح صابر | fariba saleh saber
associate professor of prosthodontics department of tehran dental faculty


شیما قاسمی | shima ghasemi
assistant professor of prosthodontics department of tabriz dental faculty


رودابه کودریان | rodabeh koodaryan
assistant professor of prosthodontics department of tabriz dental faculty


امیررضا بابالو | amirreza babaloo
assistant professor of periodontics department of tabriz dental faculty


نادر ابوالفضلی | nader abolfazli
assistant professor of periodontics department of tabriz dental faculty
نشانی اینترنتی http://dentistry.tbzmed.ac.ir/joddd/index.php/joddd/article/view/1073
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/183/article-183-319657.pdf
کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده
نوع مقاله منتشر شده Original Article
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