In this study, the accuracy and reliability of two smartphone-based 3D Face scanning applications( Face App, Bellus 3D ) for soft tissue facial mapping to the direct facial measurements was evaluated.40 participants following inclusion and exclusion criteria were selected for the study. Each participant had six soft-tissue landmarks identified :glabella (Gb), subnasal (Sn), menton (Me),pronasale(pr) chelion right (ChR), and chelion left (ChL), exocanthion (ex), endocanthion (en) . 10 interlandmark distances were measured,both directly (manual group) and digitally (digital group) on the participant's 3D facial reconstruction. Digital callipers were used to take interlandmark measurements for the manual group. Three-dimensional facial reconstructions were captured for each participant in the digital group utilising a dual-structured light facial scanners (Bellus3D and Face App). Using open-source software, interlandmark measurements were taken (Meshlab; Meshlab). Out of the 10 anthropometric parameters considered for the study 5 of them found to be statistically significant and another 5 not statistically significant.The mean nose height, The mean Nasal Bridge Length, The mean mouth width, The mean Distance b/w Glabella – Sub-Nasale, The mean Distance b/w Pro-Nasale – Menton were the parameters which are statistically significant,at P=.04,.04.,.001,.02,.02 respectively.The results showed that compared with the Face App ,Bellus 3D is producing measurements closer to the one measured clinically .Thus compared to the Face App ,Bellus 3D is more accurate.
Narendran et al. (2026) studied this question.