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Comparison of short-term clinical outcomes and patient satisfaction between intraoral scanning and conventional impressions for complete-arch implant prostheses: a pilot RCT.

Min Liu·Jun-Yu Shi·Xiao-Jiao Fu·Bei-Lei Liu·Shi-Chong Qiao·Hong-Chang Lai
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Abstract

OBJECTIVE: To compare framework passive fit, subjective evaluations, and short-term clinical outcomes between conventional impressions (CI) and intraoral scanning (IOS) for complete-arch implant-supported fixed dental prostheses (CIFDPs). METHODS: In this randomized controlled trial, 22 patients were allocated to the CI or IOS groups. All participants received a definitive one-piece CIFDP. The primary outcome was framework passive fit, assessed using the Vision and Tactile Score (V&T score), which included framework lift-off, the single-screw test, the full-screw test, smoothness of screw insertion, and radiographic gap assessment. Secondary outcomes included operator evaluation, patient satisfaction using a visual analog scale (VAS), early implant survival, marginal bone loss (MBL), modified Plaque Index (mPII), and complications at the 6-month follow-up. RESULTS: Twenty-two patients were enrolled (CI: n = 11; IOS: n = 11), and one patient in the CI group was lost to follow-up. No statistically significant difference in the V&T score was observed between the CI and IOS groups (4.66 &#xb1; 0.17 vs. 4.65 &#xb1; 0.28; P = 0.93). The operator reported greater nervousness during the CI procedure than during IOS (21.82 &#xb1; 15.69 vs. 8.64 &#xb1; 7.47; P < 0.05). Patients in the CI group reported significantly greater discomfort, including nausea and anxiety, than those in the IOS group (P < 0.05). At the 6-month follow-up, the early implant survival rate was 100% in both groups. No significant differences were found between the groups in MBL (0.09 &#xb1; 0.09 vs. 0.06 &#xb1; 0.10 mm; P = 0.43) or mPII (0.10 &#xb1; 0.12 vs. 0.10 &#xb1; 0.28; P = 0.99). CONCLUSION: IOS and CI achieved comparable short-term clinical outcomes in patients who met the predefined inclusion criteria, including controlled implant number, spacing, and angulation. IOS provided a more favorable experience for both operators and patients. CLINICAL SIGNIFICANCE: In complete-arch implant restorations, intraoral scanning may provide clinical outcomes comparable to those of conventional impressions while improving patient comfort.

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HumansPatient SatisfactionFemaleDental Prosthesis, Implant-SupportedMaleMiddle AgedPilot ProjectsTreatment OutcomeDental Impression TechniqueAgedFollow-Up StudiesDental Plaque IndexDental Restoration FailureAdultAlveolar Bone LossDental ImplantsDenture DesignDental implantDental impression techniqueIntraoral scanScan bodyJournal ArticleRandomized Controlled TrialComparative Study

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Min Liu, Jun-Yu Shi, Xiao-Jiao Fu, Bei-Lei Liu, Shi-Chong Qiao, Hong-Chang Lai. 2026-07-09. Comparison of short-term clinical outcomes and patient satisfaction between intraoral scanning and conventional impressions for complete-arch implant prostheses: a pilot RCT.. https://doi.org/10.1016/j.jdent.2026.106887

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Journal Article; Randomized Controlled Trial; Comparative Study resourceAdult subjectAged subjectComparative Study subjectDental Restoration Failure subjectFemale subjectFollow-Up Studies subjectHumans subjectJournal Article subjectMale subjectMiddle Aged subjectPatient Satisfaction subjectRandomized controlled trials study

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