Validity and Reliability of Arch Size Measurements Using Laser Scanned 3D Model

Abstract

The purpose of this study was to evaluate the validity and reliability of orthodontic measurements made on laser scanned 3D models created with NextEngine laser scanner and ScanStudioHD software. The data sources were plaster dental models from the archives of School of Dental Sciences, Universiti Sains Malaysia. A total of 100 dental models with 800 variables were measured using the plaster dental casts and laser scanned 3D models. The arch width, arch length, arch perimeter, LII, OJ and OB were measured by digital caliper (DC) and ScanStudio HD software. The validity (accuracy) of the digital measurements showed no statistical difference in any of the measurements performed. The reliability coefficient values were comparable between laser scanned 3D models and measurements using DC, the ICC coefficients were statistically significant (p<0.001), and the values of coefficient were in the range of strong correlation. The results show that linear measurements of dental casts using laser scanned 3D models are valid and reliable and can be used for various clinical orthodontic procedures.

3D CBCT human adult odontometrics: Comparative assessment in Saudi, Jordan and Egypt population

“…Odontometric morphometry and symmetry/asymmetry is an indispensable in the field of dentistry, specially, Orthodontics, Prosthodontics, Conservative dentistry, Oral surgery, Forensic dentistry and anthropology. Odontometric analysis (Haque and Alam, 2017, Purmal et al, 2013) using direct measurement methods including hand-held digital calipers (Alam et al, 2015a, Rahman et al, 2014, Hasan et al, 2015, Sajib and Alam, 2017, Alam et al, 2015b), graphical representation to record dimensions on dental casts (Khursheed et al, 2014), 2D digital model (Shahid et al, 2016, Shahid et al, 2017), Digital impression model (Noor et al, 2014, Jamayet et al, 2014, Sitthiphan et al, 2015), 3D CBCT model (Alam et al, 2014b, Alam et al, 2015c, Tarazona et al, 2011), laser scanned model (Massoud et al, 2016) have been used. Recent development in technology such as 3D CBCT has made it possible that the odontometric measurements in three-dimension (Alam et al, 2015c).…”

The Reliability and Validity of the Measurements in Unilateral Cleft Lip and Palate Laser Scanned 3D Dental Casts

“…Affected patients suffer a multitude of problems, including both functional and aesthetic diversities. A wide variety of dental anomalies such as angulation and alignment of the tooth, missing tooth, severe crowding are observed in CLP patients compared to the normal patients [14][15][16][17][18][19][20][21][22]. The maxillary dental arch dimension is compromised in affected people than normal patients [23].…”