98%
921
2 minutes
20
Functional and esthetic results require accurate implant placement. We aimed to develop a predictive method for assessing dental implant accuracy, and to evaluate the cumulative system influence of surgical guides. A mathematical model was constructed to determine the influence of surface changes on a specific point, using Jacobian matrix expressions. Tooth-supported guides with a specific locating surface were designed for model verification. Ten guides were fabricated for virtual implant accuracy tests. Locating surface errors of 0.15 mm caused significant deviations in implant positioning. Tooth-supported guide location errors significantly impacted implant accuracy, emphasizing the need for precise guide placement.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1080/10255842.2023.2284092 | DOI Listing |
Int J Impot Res
September 2025
Department of Urology, University College London Hospitals, London, United Kingdom.
The need to enhance the quality of life and functionality of patients with a number of diseases, such as congenital abnormalities, traumas, and gender incongruence, has contributed to a significant development in the field of male genital reconstructive surgery. This article highlights the roots of penile reconstructive surgeries over history, emphasizing innovative achievements that have shaped modern practices. Critical advancements that have improved surgical accuracy and post-operative care are examined, including new imaging modalities, penile prosthesis implantation, and complete phallic reconstruction.
View Article and Find Full Text PDFJ Cataract Refract Surg
July 2025
Department of Ophthalmology, West China Hospital of Sichuan University, Chengdu City, Sichuan Province, China.
Purpose: To develop and validate a multimodal deep-learning model for predicting postoperative vault height and selecting implantable collamer lens (ICL) sizes using Anterior Segment Optical Coherence Tomography (AS-OCT) and Ultrasound Biomicroscope (UBM) images combined with clinical features.
Setting: West China Hospital of Sichuan University, China.
Design: Deep-learning study.
Int J Surg
September 2025
Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China.
Background: Precise acetabular cup placement in total hip arthroplasty (THA) heavily relies on surgeons' visual judgment of angles. However, whether inherent visual angle misperception among surgeons affects surgical outcomes remains unclear. This study is the first to reveal that surgeons universally exhibit visual angle misperception, a key factor causing the cup implant positioning deviations in THA.
View Article and Find Full Text PDFNanoscale
September 2025
Quantum Technology Centre, Faculty of Physics, Lomonosov Moscow State University, Leninskie Gory, 1(2), Moscow, 119991, Russia.
We report the observation of negative differential resistance (NDR) in single-atom single-electron devices based on arsenic, phosphorus and potassium dopants implanted in a silicon host matrix. All devices exhibit NDR, with the potassium-based one exhibiting NDR at room temperature because of the larger charging and confinement energies. Our experimental results are reproduced with a simple model that assumes sequential electron tunnelling through two series-connected charge centres, each having two discrete energy levels.
View Article and Find Full Text PDFPLoS One
September 2025
Mechanical and Nuclear Engineering Department, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates.
Sectionally nonlinearly functionally graded (SNFG) structures with triply periodic minimal surface (TPMS) are considered ideal for bone implants because they closely replicate the hierarchical, anisotropic, and porous architecture of natural bone. The smooth gradient in material distribution allows for optimal load transfer, reduced stress shielding, and enhanced bone ingrowth, while TPMS provides high mechanical strength-to-weight ratio and interconnected porosity for vascularization and tissue integration. Wherein, The SNFG structure contains sections with thickness that varies nonlinearly along their length in different patterns.
View Article and Find Full Text PDF