این سایت در حال حاضر پشتیبانی نمی شود و امکان دارد داده های نشریات بروز نباشند
Journal of Dental Materials and Techniques، جلد ۱۴، شماره ۲، صفحات ۷۲-۷۹
عنوان فارسی
چکیده فارسی مقاله
کلیدواژه‌های فارسی مقاله
عنوان انگلیسی Effect of internal taper of endocrown preparation on the adaptation of 3D-printed restorations
چکیده انگلیسی مقاله Objective: This study aimed to evaluate the influence of different internal taper angles in endocrown preparations on the marginal and internal adaptation of 3D-printed restorations.Methods: Three standardized mandibular first molar models were prepared with internal taper angles of 6°, 10°, and 22°. Each model was scanned 12 times, and endocrown restorations were digitally designed and fabricated with a 3D printer using Freeprint® Temp resin. All restorations were seated by a single operator, and the adjustment time and frequency were recorded. Adaptation was assessed using the replica technique, and marginal, axial, pulpal, and axio-pulpal line angle gaps were measured under a stereomicroscope. Data were analyzed using one-way ANOVA and Tukey’s post-hoc test at the significance level of P<0.05.Results: The pulpal gap was significantly larger in the 22° taper group compared to both the 6° (P<0.001) and 10° (P=0.001) groups. The 6° taper group exhibited significantly greater marginal misfit than the 10° (P=0.035) and 22° (P=0.021) groups. The axio-pulpal line angle misfit was significantly higher in the 22° taper group than in the 6° group (P=0.016). No significant difference was observed in axial misfit among the groups (P=0.169). Notably, the 22° taper group required significantly less adjustment time and fewer adjustment attempts than the other groups (P<0.05).Conclusions: All three taper angles yielded restorations with clinically acceptable adaptation. Increasing the internal taper from 6° to 22° improved marginal fit and reduced clinical chairside adjustments; however, it resulted in a deterioration of pulpal adaptation.
کلیدواژه‌های انگلیسی مقاله Dental Marginal adaptation, Dental preparation, dental prosthesis, Permanent dental restoration, Temporary dental restoration, Three-dimensional printing
نویسندگان مقاله | Mahdi Zerafat
School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran


| Marzieh Alikhasi
Department of Prosthodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.


| Negin Yaghoobi
Department of Prosthodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran


| Nikfam Khoshkhounejad
Department of Prosthodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
نشانی اینترنتی https://jdmt.mums.ac.ir/article_26199.html
فایل مقاله فایلی برای مقاله ذخیره نشده است
کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده
نوع مقاله منتشر شده Original Article
برگشت به: صفحه اول پایگاه   |   نسخه مرتبط   |   نشریه مرتبط   |   فهرست نشریات