Results 161 to 170 of about 44,630 (308)

Dynamic Capacity and Surface Fatigue Life for Spur and Helical Gears [PDF]

A mathematical model for surface fatigue life of gear, pinion, or entire meshing gear train is given. The theory is based on a previous statistical approach for rolling-element bearings. Equations are presented which give the dynamic capacity of the gear
Coy, J. J., Townsend, D. P., Zaretsky, E. V.   +2 more
core   +1 more source

Implant Placement and Immediate Provisionalization After Alveolar Ridge Reconstruction in the Aesthetic Zone Using a Digital Workflow: A 1‐Year Prospective Case Series Study

Clinical Oral Implants Research, EarlyView.
ABSTRACT Introduction In single‐tooth replacement in the aesthetic zone, extensive bone defects require alveolar ridge reconstruction. A digital workflow involving CBCT and intraoral optical scanning enables a three‐dimensional assessment, prosthetically driven implant positioning, computer‐assisted implant surgery, and prefabrication of a temporary ...
Vincent J. J. Donker, Henny J. A. Meijer, Arjan Vissink, Gerry M. Raghoebar   +3 more
wiley   +1 more source

Proximal contact loss between implants loaded for more than 10 years and adjacent teeth. [PDF]

J Periodontal Implant Sci
Kim H, Yoon JU, Lee JY.
europepmc   +1 more source

A new procedure for calculating contact stresses in gear teeth [PDF]

A numerical procedure for evaluating and monitoring contact stresses in meshing gear teeth is discussed. The procedure is intended to extend the range of applicability and to improve the accuracy of gear contact stress analysis.
Huston, Ronald L., Somprakit, Paisan
core   +1 more source

Supportive Periodontal Therapy Improves Implant Survival in Patients With a History of Periodontitis: A Retrospective Multicenter Cohort Study of 3555 Implants

Clinical Oral Implants Research, EarlyView.
ABSTRACT Objective This study evaluated the 5‐year survival of bone‐level, internal connection, sandblasted and acid‐etched (SA) implants and identified site‐ and patient‐related risk factors for implant failure in a multicenter cohort. Materials and Methods A total of 3555 tapered bone‐level SA implants were placed between 2012 and 2018 at two ...
Dongseob Lee, Sungrak Ahn, Jin Young Park, Seung‐Ju Lee, Yong‐Moo Lee, Ki‐Tae Koo, Hyung Jin Lee, Shin Kyu Lee, Ji‐Young Joo, Jungwon Lee   +9 more
wiley   +1 more source

Chewing Affects Structural and Material Coupling, and Age-Related Dentoalveolar Joint Biomechanics and Strain. [PDF]

Bioengineering (Basel)
Ci H, Zheng X, Wang B, Ho SP.
europepmc   +1 more source

Stress concentrations in screw threads [PDF]

The concept of stress concentration in screw threads was defined using the sheer transfer rate as the fundamental quantity. The stress concentration is plotted for a fixed geometry.
Ohara, G. P.
core   +1 more source

Effect of the Buccal Gap Width on Alveolar Process Reduction Following Immediate Implant Placement: A Retrospective CBCT Study

Clinical Oral Implants Research, EarlyView.
ABSTRACT Objectives To evaluate the effect of the width of the buccal gap on the alveolar process reduction after immediate implant placement (IIP) at maxillary central incisor sites, compared to contralateral pristine tooth sites. Material and Methods Twenty‐eight subjects who were treated with IIP to replace a maxillary central incisor and presented ...
Maurício G. Araújo, Debora R. Dias, Ping Wang, Robert A. Levine   +3 more
wiley   +1 more source

Meshing performance analysis of helical face gear drives with integrated non-orthogonal, offset, and profile-shifted. [PDF]

Sci Rep
Fu X, He H, Xu H, Yan S, Li S.
europepmc   +1 more source

On dynamic loads in parallel shaft transmissions. 1: Modelling and analysis [PDF]

A model of a simple parallel-shaft, spur-gear transmission is presented. The model is developed to simulate dynamic loads in power transmissions. Factors affecting these loads are identified.
Coy, John J., Huston, Ronald L., Lin, Edward Hsiang-Hsi   +2 more
core   +1 more source