The Journal of Advanced Prosthodontics

  • 제16권4호
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  • Pages.221-230
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  • 2024
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  • 2005-7806(pISSN)
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  • 2005-7814(eISSN)
대한치과보철학회 (The Korean Academy of Prosthodonitics)
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Recording maximal intercuspation and border positions of the mandible with intraoral scanner using the acquisition software's multi-occlusion function

  • Noha Morsy (Fixed Prosthodontics, Department of Conservative Dentistry, Alexandria University) ;
  • Ihab Hammad (Fixed Prosthodontics, Department of Conservative Dentistry, Alexandria University)
  • 투고 : 2024.04.07
  • 심사 : 2024.07.01
  • 발행 : 2024.08.31
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초록

PURPOSE. This in vitro study was conducted to investigate the accuracy of intraoral scanner (IOS) for recording maximal intercuspal position (MIP) and border positions of the mandible. MATERIALS AND METHODS. Maxillary and mandibular master casts were articulated in MIP, protrusive, and lateral interocclusal position sequentially on a semi-adjustable articulator. For each articulation relation, sites of occlusal contacts (SOCs) and sites of clearance (SCs) were identified on the master casts with articulating paper (reference sites). IOS was used to take full arch scans and nine virtual interocclusal records (VIRs) for virtual articulation of models. Virtual SOCs and SCs were detected with 3D processing software and compared to those identified with the articulating paper. Sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) were calculated for each articulation relation. RESULTS. For MIP, IOS showed adequate sensitivity and NPV of 100%, and specificity and a PPV of 99%. For protrusive position, the IOS showed a sensitivity and a NPV of 100%, a high PPV of 86%, and a specificity of 83%. For lateral positions, the specificity and the PPV were high (93% and 79%, respectively), but the sensitivity and the NPV were below the clinically acceptable limits (28% and 56%, respectively). CONCLUSION. IOS displayed clinically acceptable accuracy for recording MIP and protrusive border mandibular position. However, IOS had less accuracy for lateral border mandibular position.

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과제정보

The authors would like to acknowledge Dr. Ahmed Menecy for his valuable participation in conducting the methodology of the study.

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