Effect of implant depth on accuracy:a comparative study using intraoral scanner and photogrammetry systems
- Author:
Tezcan MUSLU
1
;
Özay ÖNÖRAL
;
Sevcan KURTULMUS-YILMAZ
Author Information
- From:The Journal of Advanced Prosthodontics 2026;18(1):3-15
- CountryRepublic of Korea
- Language:English
-
Abstract:
PURPOSE:. This study aimed to evaluate the influence of implant placement depth on the accuracy of five full-arch digital impression techniques: 2 photogrammetry systems (Imetric [PGI] and Oxo Core [PGO]) and 3 intraoral scanning (IOS) routes (standard IOS, IOS with crown-shaped [IOS+C], and IOS with laterally-extending [IOS+LE] scanning aids).
MATERIALS AND METHODS:. Three master models including 5 implants with 2-, 4-, and 6-mm subgingival implant depths were fabricated. Implant positions were recorded using each of the 5 techniques (n = 15). The resultant scans were compared to reference data generated by a laboratory scanner. Deviations were 3-dimensionally assessed using root mean square values to quantify both trueness and precision. Angular deviations (AD) were calculated to provide a detailed assessment of spatial inconsistencies. Data were statistically analyzed (α = 0.05).
RESULTS:. Implant depth and impression technique, as well as their interaction, significantly affected trueness, precision, and angular deviation values (P < .001). PGI demonstrated the highest accuracy, with the lowest mean AD values across all implant positions (0.24 – 0.32°) and the highest trueness (26.57 μm) and precision (7.72 μm). IOS exhibited the largest distortions, with AD values up to 1.77° and trueness values of 74.84 μm. Precision of both photogrammetry systems were not influenced by implant depth.
CONCLUSION:. Implant depth significantly impacts the accuracy metrics of full-arch digital impressions. The Imetric system outperformed the other groups. Since laterally-extending scanning aids effectively improved accuracy, it may be recommended as a clinically viable alternative to standard IOS.
