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Related Concept Videos

Curing Methods01:26

Curing Methods

409
Concrete members with a small surface-to-volume ratio are cured by oiling and moistening the forms before casting the concrete member. These forms can be left in place for a prolonged period to prevent moisture loss, and can be wetted if made of a material suitable for wetting. If the forms are removed early, the concrete member is moistened and covered with polythene sheets to maintain moisture. For large horizontal concrete surfaces exposed to dry weather, a temporary covering is suspended...
409
Plasticizers01:31

Plasticizers

492
Water-reducers, or plasticizers, are chemical admixtures used in concrete to improve strength and workability. These additives reduce the water-cement ratio without compromising workability, lower the cement content while maintaining the same workability, or increase workability to assist concrete placement in inaccessible areas.
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...
492
Preplaced Aggregate Concrete01:29

Preplaced Aggregate Concrete

501
Preplaced aggregate concrete is ideal for construction environments that are not easily accessible. The process begins by properly wetting the gap-graded coarse aggregates to remove the dirt, then placing it in the form and compacting it. Voids are filled with a mortar mix pumped under pressure through slotted pipes. This mortar typically consists of Portland cement, pozzolan, fine aggregates, water, and a fluidizing aid. The pozzolan helps reduce bleeding and segregation while improving the...
501
Curing of Concrete01:20

Curing of Concrete

1.4K
The hydration of cement takes place within the water-filled capillary pores. However, environmental elements can disrupt this process by evaporating water from the concrete surfaces. Sealed concrete with a water-cement ratio below 0.5 experiences self-desiccation, leading to water loss. The water loss in concrete is mitigated by curing. This technique involves keeping the concrete saturated to maintain the necessary temperature and moisture conditions, to optimally fill the spaces in the cement...
1.4K
Retarders01:19

Retarders

350
Retarders are chemical admixtures designed to extend the setting time, which is especially useful when there is a delay in sequential concrete pours to prevent cold joints and to achieve a cohesive structure. Retarders, when used in appropriate amounts, can also enhance the architectural appearance of exposed aggregate finishes.
The function of retarders is to delay the setting of concrete, and this effect can be measured using a penetration test. The retardation process involves adding...
350
Placing Concrete01:17

Placing Concrete

1.7K
The concrete is placed as close as possible to its final position to avoid segregation. The placed concrete is then fully compacted to expel the entrapped air, and the next layer of concrete is laid while the underlying layer is still in the plastic state. The rate at which concrete is placed and compacted is kept equal.
While placing concrete, care is taken to ensure that the concrete is laid in uniform layers, and hand shoveling and moving concrete using poker vibrators is avoided. Also,...
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Updated: Apr 25, 2026

Effects of Mechanical Methods Used in Peri-implantitis Treatment on Implant Surface Decontamination and Roughness
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Techniques to control or avoid cement around implant-retained restorations.

Steven Present1, Robert A Levine2

  • 1Clinical Associate Professor, Temple University Kornberg School of Dentistry, Philadelphia, Pennsylvania. Instructor, Manor College, Jenkintown, Pennsylvania. Private Practice, North Wales, Pennsylvania. Fellow, International Team for Implantology.

Compendium of Continuing Education in Dentistry (Jamesburg, N.J. : 1995)
|August 28, 2014
PubMed
Summary

Understanding biologic differences between teeth and implants is crucial for dental implant success. Simplified cementation techniques can prevent peri-implant disease by managing excess cement around restorations.

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Area of Science:

  • Dental Implantology
  • Prosthodontics

Background:

  • Dental implant popularity necessitates simplified protocols resembling conventional procedures.
  • Biologic differences between natural teeth and dental implants are critical for restoration success.
  • Residual cement around implant restorations can lead to peri-implant disease.

Purpose of the Study:

  • To highlight the importance of understanding biologic differences for implant success.
  • To present techniques for managing cement excess in implant restorations.
  • To maintain esthetics and occlusion while preventing peri-implant disease.

Main Methods:

  • Review of biologic disparities between teeth and implants.
  • Description of four cementation techniques for implant restorations.
  • Focus on reducing or eliminating excess cement flow.

Main Results:

  • Techniques effectively manage cement excess around implant restorations.
  • Proper occlusion and esthetics are maintained.
  • Potential for reducing peri-implant disease through improved cement management.

Conclusions:

  • Understanding biologic differences is essential for successful implant dentistry.
  • Simplified cementation techniques can mitigate risks associated with residual cement.
  • These methods support both short- and long-term success of implant-retained restorations.