Effectiveness of using bite turbos on temporary implant crowns for intrusion in clear aligner therapy: a clinical retrospective study

This retrospective study aimed to evaluate whether aligner-incorporated bite turbos placed on implant-supported temporary crowns improve the predictability of maxillary molar intrusion during clear aligner treatment (CAT). 80 adult patients treated with clear aligners were included and divided into two groups: no-BT ( n = 45) and bite turbo (BT) ( n = 35). Digital models were superimposed using palatal rugae–based registration in OnyxCeph (Image Instruments, Chemnitz, Germany). Planned and achieved intrusion, lack of correction, and molar inclination were analyzed. Intra- and inter-examiner reliability were assessed using the intraclass correlation coefficient (ICC). No statistically significant differences were observed between BT and control groups in planned intrusion ( p = 0.184), lack of correction ( p = 0.953), or achieved inclination ( p = 0.137). Within the limitations of this retrospective study, aligner-incorporated bite turbos on temporary prosthetic crowns did not significantly improve elongated maxillary molar intrusion during clear aligner therapy.