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Proofreading

Proofreading

Synthesis of new DNA molecules is carried out by the enzyme DNA polymerase, which adds nucleotides on the daughter strand complementary to the template DNA strand. DNA polymerase has a higher affinity to add the correct base and ensures fidelity during DNA replication. Furthermore, it exhibits proofreading activity during replication, using an exonuclease domain that cuts off incorrect nucleotides from the nascent DNA strand.
Errors During Replication are Corrected by the DNA Polymerase Enzyme

Proofreading

Proofreading

Synthesis of new DNA molecules starts when DNA polymerase links nucleotides together in a sequence that is complementary to the template DNA strand. DNA polymerase has a higher affinity for the correct base to ensure fidelity in DNA replication. The DNA polymerase furthermore proofreads during replication, using an exonuclease domain that cuts off incorrect nucleotides from the nascent DNA strand.Errors during Replication Are Corrected by the DNA Polymerase EnzymeGenomic DNA is synthesized in...

Proofreading

Proofreading

Synthesis of new DNA molecules starts when DNA polymerase links nucleotides together in a sequence that is complementary to the template DNA strand. DNA polymerase has a higher affinity for the correct base to ensure fidelity in DNA replication. The DNA polymerase furthermore proofreads during replication, using an exonuclease domain that cuts off incorrect nucleotides from the nascent DNA strand.Errors during Replication Are Corrected by the DNA Polymerase EnzymeGenomic DNA is synthesized in...

Design of Transmission Shafts

Design of Transmission Shafts

The design of a transmission shaft is governed by two primary specifications: the power it transmits and its rotational speed. These parameters guide the selection of the shaft's material and cross-sectional dimensions, ensuring that the material's maximum shearing stress remains within the elastic limit while transmitting the desired power at the given speed. The system's power is intrinsically linked to the applied torque. The torque applied to the shaft can be calculated by reconfiguring the...

Design of Transmission Shafts - Stress Analysis

Design of Transmission Shafts - Stress Analysis

Designing a transmission shaft requires a thorough understanding of the stresses induced by bending moments and torques, especially in systems where power is transferred through gears. These forces create force-couple systems at the centers of the shaft's cross-sections, leading to both transverse and torsional loading. Although shearing stresses from transverse loads are typically smaller than those from torques and are often overlooked, the significant normal stresses from these loads...

Transmission Shafts: Problem Solving

Transmission Shafts: Problem Solving

Designing a solid shaft that transmits power from a motor to a machine tool involves a series of calculations to ensure the shaft can withstand the stresses applied by bending moments and torques. First, calculate the torque exerted on the gear, considering the power transmitted by the shaft and its rotational speed. Following this, compute the tangential forces acting on the gears, which directly relate to the torque and the gear radius.
Next, use bending moment diagrams for the shaft to...

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Related Experiment Video

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A Performance-testing Platform for a Conduction Micropump with an FR-4 Copper-clad Electrode Plate

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The socket-shield technique: a proof-of-principle report.

Markus B Hürzeler¹, Otto Zuhr, Peter Schupbach

¹Private Office Huerzeler/Zuhr, Munich, Germany. m.huerzeler@huerzelerzuhr.com

Journal of Clinical Periodontology

|August 18, 2010

Summary

Retaining a tooth root fragment using the socket-shield technique with immediate implant placement supports osseointegration. This method helps preserve the buccal bone plate and surrounding tissues.

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Area of Science:

Dental implantology
Periodontology
Oral surgery

Background:

Preserving alveolar bone and soft tissue is crucial for successful immediate dental implant placement.
The socket-shield technique, involving partial root retention, is proposed to maintain facial bone plate dimensions.

Observation:

A proof-of-principle study in a beagle dog model utilized the socket-shield technique with immediate implant placement.
Histological and backscatter scanning electron microscopy evaluated osseointegration and tissue response after 4 months.

Findings:

All implants achieved osseointegration without inflammatory reactions.
The retained root fragment showed no resorption and maintained a periodontal ligament with the buccal bone plate.
New cementum formed on the fragment and directly on the implant surface where contact occurred.

Implications:

Partial root retention appears to be a viable strategy for preserving buccal bone during immediate implant placement.
This technique may enhance esthetic outcomes and long-term implant success by maintaining ridge volume.