Importance of a distal proximal contact on load transfer by implant-supported single adjacent crowns in posterior region of the mandible: a photoelastic study

The molars are one of the first teeth to be lost over lifetime; thus, their replacement is frequently needed. Implantation is generally the preferred choice to replace a missing single tooth avoiding vital teeth preparation and bridge fabrication. Placement of implant to replace a molar presents diagnostic, surgical, and prosthetic demands, such as an enlarged mesiodistal dimension and occlusal forces distribution. Poor bone quality in the posterior regions, especially the maxilla, could jeopardize the short- and long-term implant success. Anatomical considerations and adjacent vital structures (ie, maxillary sinus and mandibular canal), occlusal loads, and the occlusal table, which is frequently wider than the implant diameter, should also be of some concern. Quality and density of the bone in the posterior regions can compromise initial implant stabilization and load transfer to the bone. The most frequent single molar to be replaced is the first mandibular molar, because this tooth is lost first. Implantation in the posterior area is a predictable procedure over time. The low rate of complications in addition to the high long-term success rate make implant restoration a reliable solution to treat posterior partial edentulism. Hence the present study was planned for evaluation for evaluation of use of narrow diameter implants in in posterior region of the jaws. The present study was planned in Department of Impalantology, Manipal College of dental sciences Manipal. Total 20 cases were enrolled in the present study. Out of that 10 cases were scheduled for single unit prosthetic rehabilitation supported by implant in the posterior region of the jaws was evaluated in Group A. These cases were implemented with the Narrow Diameter Implant (NDI). Remaining 10 cases were evaluated in the Group B as control cases. These control patients received the Regular Diameter Implant (RDI). The data generated from the present study concludes that NDIs placed in posterior region of the jaws without sufficient bone thickness for placement of RDIs presented a high success and survival rate. In addition to that, NDIs presented marginal bone loss patterns similar to those for RDIs, both in the maxilla and mandible. Thus, it can be suggested that NDIs may be successfully used in the posterior regions of the jaws. More studies with longer follow-up intervals are, however, necessary to further evaluate single crowns supported by NDIs in the posterior region of the jaws. Keywords: Narrow Diameter Implants, Posterior Region of the Jaws, Regular Diameter Implant, NDI, RDI, etc.

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Preparation of Electron Transparent Metal-Matrix Composites

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100101414 ◽

1968 ◽

Vol 26 ◽

pp. 334-335 ◽

Cited By ~ 2

Author(s):

M. R. Pinnel ◽

A. Lawley

Keyword(s):

Stainless Steel ◽

Load Transfer ◽

Volume Fraction ◽

Steel Wire ◽

Initial Step ◽

Interfacial Region ◽

Matrix Composites ◽

Specific Test ◽

The Matrix ◽

The One

Numerous phenomenological descriptions of the mechanical behavior of composite materials have been developed. There is now an urgent need to study and interpret deformation behavior, load transfer, and strain distribution, in terms of micromechanisms at the atomic level. One approach is to characterize dislocation substructure resulting from specific test conditions by the various techniques of transmission electron microscopy. The present paper describes a technique for the preparation of electron transparent composites of aluminum-stainless steel, such that examination of the matrix-fiber (wire), or interfacial region is possible. Dislocation substructures are currently under examination following tensile, compressive, and creep loading. The technique complements and extends the one other study in this area by Hancock.The composite examined was hot-pressed (argon atmosphere) 99.99% aluminum reinforced with 15% volume fraction stainless steel wire (0.006″ dia.).Foils were prepared so that the stainless steel wires run longitudinally in the plane of the specimen i.e. the electron beam is perpendicular to the axes of the wires. The initial step involves cutting slices ∼0.040″ in thickness on a diamond slitting wheel.

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Deformation at interfaces of Ti-6Al-4V/SiC fiber composites

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100121193 ◽

1992 ◽

Vol 50 (1) ◽

pp. 158-159

Author(s):

Warren J. Moberly ◽

Daniel B. Miracle ◽

S. Krishnamurthy

Keyword(s):

Thermal Stresses ◽

Load Transfer ◽

Coefficient Of Thermal Expansion ◽

Hot Isostatic Pressing ◽

Matrix Composites ◽

Ongoing Research ◽

Aerospace Applications ◽

Sic Fiber ◽

The Matrix ◽

Intermetallic Matrix Composites

Titanium-aluminum alloy metal matrix composites (MMC) and Ti-Al intermetallic matrix composites (IMC), reinforced with continuous SCS6 SiC fibers are leading candidates for high temperature aerospace applications such as the National Aerospace Plane (NASP). The nature of deformation at fiber / matrix interfaces is characterized in this ongoing research. One major concern is the mismatch in coefficient of thermal expansion (CTE) between the Ti-based matrix and the SiC fiber. This can lead to thermal stresses upon cooling down from the temperature incurred during hot isostatic pressing (HIP), which are sufficient to cause yielding in the matrix, and/or lead to fatigue from the thermal cycling that will be incurred during application, A second concern is the load transfer, from fiber to matrix, that is required if/when fiber fracture occurs. In both cases the stresses in the matrix are most severe at the interlace.

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Definition of load transfer curves of piles in granitic residual soil

Geotecnia ◽

10.24849/j.geot.2014.130.04 ◽

2014 ◽

Vol 130 ◽

pp. 79-99

Author(s):

David Jorge Pereira Fernandes ◽

◽

<br>António Viana da Fonseca ◽

Keyword(s):

Load Transfer ◽

Residual Soil ◽

Definition Of

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Ameloblastic Fibroma Associated With Impacted 3rd Molar: A Case Report

International Healthcare Research Journal ◽

10.26440/ihrj/01_07/117 ◽

2017 ◽

Vol 1 (7) ◽

pp. 18-21

Author(s):

K Indira Priyadarshini ◽

Karthik Raghupathy ◽

K V Lokesh ◽

B Venu Naidu

Keyword(s):

Relative Frequency ◽

Posterior Region ◽

Radiographic Examination ◽

Dental Eruption ◽

Ameloblastic Fibroma ◽

Odontogenic Origin ◽

The Common ◽

The Times ◽

The Right ◽

Slow Growing

Ameloblastic fibroma is an uncommon mixed neoplasm of odontogenic origin with a relative frequency between 1.5 – 4.5%. It can occur either in the mandible or maxilla, but predominantly seen in the posterior region of the mandible. It occurs in the first two decades of life. Most of the times it is associated with tooth enclosure, causing a delay in eruption or altering the dental eruption sequence. The common clinical manifestation is a slow growing painless swelling and is detected during routine radiographic examination. There is controversy in the mode of treatment, whether conservative or aggressive. Here we reported a 38 year old male patient referred for evaluation of painless swelling on the right posterior region of the mandible associated with clinically missing 3rd molar. The lesion was completely enucleated under general anesthesia along with the extraction of impacted molar.

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Treatment of recurrent oro antral fistula in left maxillary posterior region: a secondary repair procedure with buccal fat pad advancement technique

Asian Pacific Journal of Health Sciences ◽

10.21276/apjhs.2014.1.1s.10 ◽

2014 ◽

pp. 47-49

Author(s):

Siddharth Phull ◽

◽

Geetanjali Phull ◽

Divia Chugh ◽

Pardeep Sheokand

Keyword(s):

Posterior Region ◽

Fat Pad ◽

Buccal Fat Pad ◽

Repair Procedure

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Modelling of a Partially Loaded Road Tanker during a Braking-in-a-Turn Maneuver

Actuators ◽

10.3390/act7030045 ◽

2018 ◽

Vol 7 (3) ◽

pp. 45 ◽

Cited By ~ 2

Author(s):

Frank Otremba ◽

José Romero Navarrete ◽

Alejandro Lozano Guzmán

Keyword(s):

Road Safety ◽

Load Transfer ◽

Dynamic Interaction ◽

Performance Measure ◽

Lateral Stability ◽

Safety Level ◽

Factors Associated ◽

Braking System ◽

Factors Influencing ◽

Fill Level

Road safety depends on several factors associated with the vehicle, to the infrastructure, as well as to the environment and experience of vehicle drivers. Concerning the vehicle factors influencing the safety level of an infrastructure, it has been shown that the dynamic interaction between the carried liquid cargo and the vehicle influences the operational safety limits of the vehicle. A combination of vehicle and infrastructure factors converge when a vehicle carrying liquid cargo at a partial fill level performs a braking maneuver along a curved road segment. Such a maneuver involves both longitudinal and lateral load transfers that potentially affect both the braking efficiency and the lateral stability of the vehicle. In this paper, a series of models are set together to simulate the effects of a sloshing cargo on the braking efficiency and load transfer rate of a partially filled road tanker. The model assumes the superposition of the roll and pitch independent responses, while the vehicle is equipped with Anti-lock braking System brakes (ABS) in the four wheels. Results suggest that cargo sloshing can affect the performance of the vehicle on the order of 2% to 9%, as a function of the performance measure considered. A dedicated ABS system could be considered to cope with such diminished performance.

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Comparison of the Bidirectional Load Test with the Top-Down Load Test

Transportation Research Record Journal of the Transportation Research Board ◽

10.1177/0361198105193600113 ◽

2005 ◽

Vol 1936 (1) ◽

pp. 108-116 ◽

Cited By ~ 3

Author(s):

Oh Sung Kwon ◽

Yongkyu Choi ◽

Ohkyun Kwon ◽

Myoung Mo Kim

Keyword(s):

Load Transfer ◽

Measurement Data ◽

Load Test ◽

Load Testing ◽

Pile Head ◽

Top Down ◽

Simple Method ◽

Testing Method ◽

Settlement Behavior ◽

Cell Test

For the past decade, the Osterberg testing method (O-cell test) has been proved advantageous over the conventional pile load testing method in many aspects. However, because the O-cell test uses a loading mechanism entirely different from that of the conventional pile loading testing method, many investigators and practicing engineers have been concerned that the O-cell test would give inaccurate results, especially about the pile head settlement behavior. Therefore, a bidirectional load test using the Osterberg method and the conventional top-down load test were executed on 1.5-m diameter cast-in-place concrete piles at the same time and site. Strain gauges were placed on the piles. The two tests gave similar load transfer curves at various depth of piles. However, the top-down equivalent curve constructed from the bidirectional load test results predicted the pile head settlement under the pile design load to be approximately one half of that predicted by the conventional top-down load test. To improve the prediction accuracy of the top-down equivalent curve, a simple method that accounts for the pile compression was proposed. It was also shown that the strain gauge measurement data from the bidirectional load test could reproduce almost the same top-down curve.

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