Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Accuracy, limits, and approximation01:28

Accuracy, limits, and approximation

983
Accuracy, limits, and approximations are common in many fields, especially in engineering calculations. These concepts are imperative for ensuring that a given value is as close as possible to its true value.
Accuracy is defined as the closeness of the measured value to the true or actual value. In engineering mechanics, repeated measurements are taken during theoretical or experimental analyses to ensure that the result is precise and accurate.
The accuracy of any solution is based on the...
983
The Distance Formula01:20

The Distance Formula

465
In geometry, measuring the direct distance between two points on a plane is essential in various practical and theoretical applications. Whether in navigation, engineering, or computer graphics, determining the shortest path between two locations involves using the distance formula. This formula is derived from the Pythagorean Theorem, which relates the lengths of the sides of a right triangle. On a coordinate plane, the horizontal and vertical distances between two points serve as the legs of...
465
Beams with Unsymmetric Loadings01:17

Beams with Unsymmetric Loadings

302
Analyzing a supported beam under unsymmetrical loadings is essential in structural engineering to understand how beams respond to varied force distributions. This analysis involves calculating the deflection and identifying points where the slope of the beam is zero, which are crucial for ensuring structural stability and functionality.
The first moment-area theorem determines the slope at any point on the beam. This theorem indicates that the change in slope between two points on a beam...
302
Moment-Area Theorems01:17

Moment-Area Theorems

552
The Moment-Area Theorem is crucial in structural engineering for analyzing beam bending, particularly in applications like building floor supports. This theorem utilizes the geometric properties of the elastic curve, which depicts how a beam deforms under load, to simplify the calculations of deflections and slopes.
The theorem is divided into two parts. The first part connects the angle between tangents at any two points on the beam's elastic curve to the area under a curve derived by...
552
Design Example: Measuring Distance Between Two Points with Obstructions01:10

Design Example: Measuring Distance Between Two Points with Obstructions

275
When measuring distances in areas with physical obstructions, such as a lake in a field, surveyors must employ techniques to calculate accurate lengths without direct line measurements. One effective method is the offset technique, which allows for precise distance estimation over inaccessible stretches.In this scenario, a surveyor must measure a side of an area that crosses a lake. Since the measuring tape cannot span the lake, the surveyor begins by establishing a baseline that aligns with...
275
Norton's Theorem01:14

Norton's Theorem

1.2K
Norton's theorem is a fundamental principle stating that a linear two-terminal circuit can be substituted with an equivalent circuit, which comprises a current source (ⅠN) in parallel with a resistor (RN). Here, ⅠN represents the short-circuit current flowing through the terminals, and RN stands for the input or equivalent resistance at the terminals when all independent sources are deactivated. This implies that the circuit illustrated in Figure (a) can be exchanged with the one depicted...
1.2K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Radiographic assessment of lesser metatarsophalangeal joint distraction for the diagnosis of plantar plate tears: A cadaveric study.

Foot and ankle surgery : official journal of the European Society of Foot and Ankle Surgeons·2026
Same author

Quantitative Analysis of Level-Specific Fusion Outcomes and Scapular Positioning in Scapulothoracic Arthrodesis.

Orthopaedics & traumatology, surgery & research : OTSR·2026
Same author

The Interplay of Fatalism, Death Anxiety, and Treatment Compliance in Patients with Diabetes Who Have Undergone Amputation: A Mixed-Methods Study.

Advances in skin & wound care·2026
Same author

Arch-supports and plantar fasciitis: A prospective study incorporating patient-reported outcomes and finite element analysis.

Journal of experimental orthopaedics·2026
Same author

Precision, Personalization, and Progress: A New Era in Foot and Ankle Surgery.

Acta orthopaedica et traumatologica turcica·2026
Same author

Improving subtalar arthrodesis with a skin-matched patient-specific surgical guide: A comparative cadaveric study.

Acta orthopaedica et traumatologica turcica·2026

Related Experiment Video

Updated: Dec 6, 2025

Atomic Force Microscopy Cantilever-Based Nanoindentation: Mechanical Property Measurements at the Nanoscale in Air and Fluid
08:58

Atomic Force Microscopy Cantilever-Based Nanoindentation: Mechanical Property Measurements at the Nanoscale in Air and Fluid

Published on: December 2, 2022

3.5K

A novel lower bound for tip-apex distance.

Omer Subasi1, Lercan Aslan2, Mehmet Demirhan2

  • 1Manufacturing and Automation Research Center, Koc University, Istanbul, 34450, Turkey.

European Journal of Trauma and Emergency Surgery : Official Publication of the European Trauma Society
|October 10, 2020
PubMed
Summary

The tip-apex distance (TAD) below 25 mm is insufficient for predicting cephalomedullary nail cut-out in intertrochanteric fractures. A novel parameter, TADX, provides a necessary lower bound for optimal nail tip positioning, improving surgical safety.

Keywords:
FluoroscopyIntertrochanteric fractureProximal nailingTADTip-apex distance

More Related Videos

Quantitative Hardness Measurement by Instrumented AFM-indentation
08:21

Quantitative Hardness Measurement by Instrumented AFM-indentation

Published on: November 22, 2016

10.0K
Development of Microfluidic Devices to Study the Elongation Capability of Tip-growing Plant Cells in Extremely Small Spaces
07:01

Development of Microfluidic Devices to Study the Elongation Capability of Tip-growing Plant Cells in Extremely Small Spaces

Published on: May 22, 2018

7.7K

Related Experiment Videos

Last Updated: Dec 6, 2025

Atomic Force Microscopy Cantilever-Based Nanoindentation: Mechanical Property Measurements at the Nanoscale in Air and Fluid
08:58

Atomic Force Microscopy Cantilever-Based Nanoindentation: Mechanical Property Measurements at the Nanoscale in Air and Fluid

Published on: December 2, 2022

3.5K
Quantitative Hardness Measurement by Instrumented AFM-indentation
08:21

Quantitative Hardness Measurement by Instrumented AFM-indentation

Published on: November 22, 2016

10.0K
Development of Microfluidic Devices to Study the Elongation Capability of Tip-growing Plant Cells in Extremely Small Spaces
07:01

Development of Microfluidic Devices to Study the Elongation Capability of Tip-growing Plant Cells in Extremely Small Spaces

Published on: May 22, 2018

7.7K

Area of Science:

  • Orthopedic surgery
  • Biomechanical engineering
  • Medical imaging analysis

Background:

  • Cephalomedullary nail cut-out is a common complication in intertrochanteric fractures.
  • The tip-apex distance (TAD) below 25 mm is a widely accepted risk predictor.
  • Current risk assessment using TAD is mathematically insufficient for defining optimal nail tip placement.

Purpose of the Study:

  • To demonstrate the mathematical insufficiency of TAD < 25 mm as a sole risk predictor.
  • To introduce and validate a novel parameter, TADX, for improved risk assessment.
  • To establish appropriate lower and upper bounds for nail tip positioning.

Main Methods:

  • Utilized mathematical simulation software to create a 3D grid of the proximal femur.
  • Simulated safe and risk-bearing regions based on TAD and proposed TADX values.
  • Calculated intersection volumes to determine optimal TADX limits in conjunction with TAD < 25 mm.

Main Results:

  • TAD is suitable for defining the upper boundary of the optimal tip region but not the lower boundary.
  • TADX provides a mathematically sound lower limit, creating a 3D volume closer to the ideal tip position.
  • TADX can be calculated quickly from standard 2D fluoroscopic views.

Conclusions:

  • A lower bound for TADX is essential for accurate risk prediction.
  • Suggested TADX lower bounds are 9 mm (small), 7.5 mm (medium), and 7 mm (large) femoral heads.
  • Combining TADX lower bounds with a TAD upper bound of 25 mm optimizes nail tip placement and reduces complications.