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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BORIS DOI
Publisher DOI
PubMed ID
42276901
Description
Statement Of Problem
The combined effect of the arch scanned, recording level (implant versus multiunit), and recording technique on the trueness and fit of complete arch implant-supported fixed dental prostheses (CAISFDPs) is not well known.Purpose
This study aimed to investigate how the recording level, recording technique, and dental arch affect the trueness and fit of CAISFDPs.Material And Methods
Maxillary and mandibular casts with 2 straight anterior and 2 tilted posterior implants (4.5×12 mm) were digitized using an industrial scanner (Artec Micro II). Recordings were made either digitally using an intraoral scanner or conventionally using an open-tray technique, either multiunit abutment or implant level (n=7). Laser-sintered titanium frameworks were fabricated. The framework trueness and average gap values were analyzed for the effect of recording type, level, and arch by using a metrology-grade software program (Geomagic Control X). The correlation analyses between trueness and average gap values were performed using the Pearson correlation test (α=.05).Results
Recording level (P>.79), recording technique (P>.74), and their interaction had no significant effect (P>.99) on mandibular framework trueness. Frameworks fabricated from abutment-level recordings had lower RMS values than those fabricated from implant-level recordings (P<.001). In contrast, no significant differences were observed between digital scans and conventional recordings at either the implant or abutment level (P>.05). Maxillary framework trueness was not influenced by the recording technique (P>.05). For the maxilla, digital scans resulted in lower average gap values than conventional recordings (P=.005). The average gap values ranged between 40.1 and 242.1 µm. A negative correlation was observed between framework overall trueness and average gap values for mandibular digital scans (r=-.821, P=.023).Conclusions
Digital abutment- and implant-level scans resulted in high manufacturing trueness and fit in both arches, comparable with those of frameworks manufactured by using conventional recordings.
The combined effect of the arch scanned, recording level (implant versus multiunit), and recording technique on the trueness and fit of complete arch implant-supported fixed dental prostheses (CAISFDPs) is not well known.Purpose
This study aimed to investigate how the recording level, recording technique, and dental arch affect the trueness and fit of CAISFDPs.Material And Methods
Maxillary and mandibular casts with 2 straight anterior and 2 tilted posterior implants (4.5×12 mm) were digitized using an industrial scanner (Artec Micro II). Recordings were made either digitally using an intraoral scanner or conventionally using an open-tray technique, either multiunit abutment or implant level (n=7). Laser-sintered titanium frameworks were fabricated. The framework trueness and average gap values were analyzed for the effect of recording type, level, and arch by using a metrology-grade software program (Geomagic Control X). The correlation analyses between trueness and average gap values were performed using the Pearson correlation test (α=.05).Results
Recording level (P>.79), recording technique (P>.74), and their interaction had no significant effect (P>.99) on mandibular framework trueness. Frameworks fabricated from abutment-level recordings had lower RMS values than those fabricated from implant-level recordings (P<.001). In contrast, no significant differences were observed between digital scans and conventional recordings at either the implant or abutment level (P>.05). Maxillary framework trueness was not influenced by the recording technique (P>.05). For the maxilla, digital scans resulted in lower average gap values than conventional recordings (P=.005). The average gap values ranged between 40.1 and 242.1 µm. A negative correlation was observed between framework overall trueness and average gap values for mandibular digital scans (r=-.821, P=.023).Conclusions
Digital abutment- and implant-level scans resulted in high manufacturing trueness and fit in both arches, comparable with those of frameworks manufactured by using conventional recordings.
Date of Publication
2026-06-11
Publication Type
Article
Subject(s)
Language(s)
en
Contributor(s)
Cevik, Pinar | |
Kahveci, Çiğdem |
Series
The Journal of Prosthetic Dentistry
Publisher
Elsevier
ISSN
1097-6841
0022-3913
Access(Rights)
open.access