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The milled surface as a precision attachment.

James S Brudvik1, Alexander Shor

  • 1Department of Prosthodontics, University of Washington School of Dentistry, Box 357452, Seattle, WA 989195, USA. brudvik@u.washington.edu

Dental Clinics of North America
|July 21, 2004
PubMed
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Milled extracoronal preparations on abutment teeth offer controlled insertion and removal for partial dentures. This technique enhances stability and aesthetics, serving as a viable alternative to precision attachments.

Area of Science:

  • Dental prosthetics
  • Restorative dentistry
  • Biomaterials science

Background:

  • Conventional precision attachments offer excellent control and aesthetics for partially edentulous patients.
  • However, their preparation often requires significant tooth reduction, increasing the risk of abutment fracture.
  • There is a need for alternative methods that provide similar benefits with minimal invasiveness.

Purpose of the Study:

  • To evaluate the efficacy of milled extracoronal preparations combined with removable partial denture castings as an alternative to precision attachments.
  • To assess the control over the path of insertion and removal, stability, and aesthetic outcomes.
  • To determine if this method minimizes abutment tooth reduction.

Main Methods:

  • Creation of paralleled, milled extracoronal surfaces on natural or restored abutment teeth.

Related Experiment Videos

  • Fabrication of removable partial denture castings with optimal contact to these milled preparations.
  • Evaluation of the path of insertion/removal, stability, and resistance to rotational movements.
  • Comparison with conventional precision attachments and posterior clasping.

    • Main Results:

    • Milled surfaces and denture castings provided a controlled path of insertion and removal, similar to precision attachments.
    • The extracoronal nature of the preparations required minimal additional tooth reduction.
    • Enhanced stability and resistance to rotational movements were observed, especially with conventional posterior clasping.

    Conclusions:

    • Milled extracoronal preparations offer a controlled and aesthetically pleasing solution for partially edentulous patients.
    • This technique minimizes abutment tooth reduction, thereby reducing the risk of fracture.
    • It presents a practical and effective alternative to conventional precision attachments.