Results 101 to 110 of about 44,878 (304)

Comparing Digital Reduction Guides and Free‐Hand Techniques for Predoctoral Crown Preparation Accuracy

Journal of Dental Education, EarlyView.
ABSTRACT Purpose/Objectives Insufficient tooth reduction compromises crown longevity and aesthetics. This study aimed to determine whether digitally designed, 3D‐printed reduction guides improved crown preparation accuracy and efficiency for dental students compared to freehand preparation.
Xiaoyue Shi, Shuncong Xu, Chenxuan Wei
wiley   +1 more source

Research on Error Sensitivity Mechanism, Load-Bearing Contact Analysis and Load-Bearing Contact Characteristics of Curved Face Gears Based on Point Cloud Modeling

Mathematics
To address the limitations of traditional analytical modeling in capturing complex surface topographies, this paper presents comprehensive research on the error sensitivity mechanism, loaded tooth contact analysis (LTCA), and load-bearing contact ...
Qing Li, Runshan Gao, Chongxi Zhao, Jiaqi Ji, Moudong Wu, Chong Tian, Qi Yin   +6 more
doaj   +1 more source

Change in tooth mobility following non‐surgical periodontal therapy: A retrospective cohort study of clinical outcomes

Journal of Periodontology, EarlyView.
Abstract Background To evaluate the change in clinical tooth mobility following scaling and root planing (SRP) and to identify baseline factors predictive of the 12‐month outcome. Methods This retrospective cohort study utilized de‐identified electronic health records from the BigMouth Dental Data Repository. The final cohort consisted of 152 patients,
Georgios S. Chatzopoulos, Larry F. Wolff
wiley   +1 more source

Predicting peri‐implantitis incidence and implant failure via risk‐assessment and prognostication tools: A validation study

Journal of Periodontology, EarlyView.
Abstract Background Identifying individuals at high risk for developing peri‐implantitis (PI) and then determining the prognosis for implants with PI is crucial for treatment planning. Methods This study longitudinally followed implants from implant placement retrospectively.
Muhammad H. A. Saleh, Era Kakar, Giuseppe Troiano, Hamzeh Almashni, Jonathan Misch, Fariba Esperouz, Shahad Alhazmi, Hom‐Lay Wang, Zoltán Baráth, Istvan A. Urban   +9 more
wiley   +1 more source

Calculation and Analysis of Meshing Efficiency of the New Internal S-gears

Jixie chuandong
In order to accurately calculate the meshing efficiency of the new internal S-gears, a time-varying friction model of the elastohydrodynamic lubrication is established considering the surface sliding of the gear tooth, lubricating oil condition and load.
Cheng Hongye, Jia Chao, Fang Zongde
doaj  

Meshing Performance Analysis of a Topologically Modified and Formed Internal Helical Gear Pair

Machines
Internal helical gear pairs are sensitive to manufacturing and assembly errors, loading deformation, which can result in vibration and noise. Three-dimensional topological modification of tooth surfaces is available to reduce this sensitivity.
Jianxin Su, Xiao Wei, Shilin Lian, Jiewei Xu   +3 more
doaj   +1 more source

Resistance to Fracture of Two All-Ceramic Crown Materials Following Endodontic Access [PDF]

, 2006
Statement of problem There is currently no protocol for managing endodontic access openings for all-ceramic crowns. A direct restorative material is generally used to repair the access opening, rendering a repaired crown as the definitive restoration ...
Berzins, David W., Luo, Qing, Nagy, William W., Thompson, Geoffrey A., Toth, Jeffrey M., Wood, Kelly Copps   +5 more
core   +1 more source

A multicenter, controlled, randomized trial of home‐applied dual‐light photodynamic therapy in stage I to III periodontitis (LumoNorth2022 study)

Journal of Periodontology, EarlyView.
Abstract Background Periodontitis is a widespread, chronic infection‐triggered inflammatory condition in which professional supportive periodontal care (SPC) and daily oral hygiene form the backbone to reduce the disease activity. Light‐based treatments have shown promising antibacterial effects, but their potential for routine home use has not been ...
Paula Tegelberg, Meeri Ojala, Merja Ylipalosaari, Jori Lindroth, Anna Maria Heikkinen, Hanna Lähteenmäki, Saila Pakarinen, Ismo T. Räisänen, Timo Sorsa, Tommi Pätilä   +9 more
wiley   +1 more source

Evaluation of a high-torque backlash-free roller actuator [PDF]

The results are presented of a test program that evaluated the stiffness, accuracy, torque ripple, frictional losses, and torque holding capability of a 16:1 ratio, 430 N-m (320 ft-lb) planetary roller drive for a potential space vehicle actuator ...
Anderson, William, Rohn, Douglas A., Steinetz, Bruce M.   +2 more
core   +1 more source

Horizontal saddle-supported storage vessels: A parametric study of plastic collapse loads [PDF]

, 2003
Previous work by the present authors compared various theoretical methods with simple experiments for the plastic collapse load on end supported vessels loaded centrally by rigid saddles.
Chan, G.C.M., Nash, D.H., Spence, J., Tooth, A.S.   +3 more
core   +1 more source