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Comparison of different impression techniques for edentulous jaws using three-dimensional analysis.

Sua Jung1, Chan Park1, Hong-So Yang1

  • 1Department of Prosthodontics, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea.

The Journal of Advanced Prosthodontics
|July 13, 2019
PubMed
Summary

Two novel impression methods, simple modified closed-mouth (SI) and digital (DI), are effective for edentulous jaws, with SI showing clinical applicability. Conventional impression (CI) results were comparable to novel methods in supporting areas.

Keywords:
3-Dimensional (3D) analysisDigital impressionEdentulousJawSimple modified impression

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Area of Science:

  • Dentistry
  • Prosthodontics
  • Biomaterials

Background:

  • Accurate impressions are crucial for fabricating well-fitting dentures in edentulous patients.
  • Conventional impression methods can be time-consuming and may present challenges in capturing precise details.
  • Novel impression techniques aim to improve accuracy and efficiency in dental prosthetics.

Purpose of the Study:

  • To compare the accuracy of two novel impression techniques (simple modified closed-mouth and digital) against a conventional method for edentulous jaws.
  • To evaluate the dimensional stability and surface accuracy of impressions using 3D analysis software.
  • To determine the clinical applicability of the novel impression methods.

Main Methods:

  • Three impression techniques were used on five edentulous patients: conventional (CI), simple modified closed-mouth (SI), and digital (DI).
  • Gypsum models were created, scanned, and analyzed using 3D software to measure area displacement.
  • Statistical analysis (Kruskal-Wallis test) was performed to compare differences between methods.

Main Results:

  • No statistically significant differences were found between the conventional impression (CI) and digital impression (DI) methods in edentulous supporting areas.
  • The simple modified closed-mouth (SI) method showed minimal differences compared to CI, particularly in the maxilla (<0.14 mm).
  • The mandibular vestibule showed the greatest difference between CI and SI, though not statistically significant.

Conclusions:

  • All three impression methods (CI, SI, DI) demonstrated effectiveness in capturing impressions of supporting areas in edentulous patients.
  • The simple modified closed-mouth (SI) impression technique is clinically applicable for edentulous jaw impressions.
  • Novel impression techniques offer viable alternatives to conventional methods, potentially improving prosthetic outcomes.