Effect of scanned arch, level of recording, and recording technique for trueness and marginal fit of complete arch implant-supported fixed dental prostheses

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Key Points

This study aims to explore how scanning methods, recording levels, and dental arch styles affect the accuracy and fit of implant-supported fixed dental prostheses.
Maxillary and mandibular casts were prepared with implants and digitized using an industrial scanner.
Recordings were made using either digital intraoral scanners or conventional open-tray techniques.
Correlation analyses between trueness and gap values were performed using the Pearson correlation test.
No significant effects of recording level or technique on mandibular framework trueness (P>.79, P>.74).
Abutment-level recordings yielded lower RMS values than implant-level recordings (P<.001).
Digital scans showed lower average gap values than conventional recordings for the maxilla (P=.005).

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Investigates trueness and fit of complete arch implant prostheses by recording levels and techniques, indicating implications for dental practice.

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Yilmaz et al. (2026) studied this question.

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