3-Dimensional characterization of cortical bone microdamage following placement of orthodontic microimplants using Optical Coherence Tomography

Abstract

Microimplants are being used extensively in clinical practice to achieve absolute anchorage. Success of microimplant mainly depend on its primary stability onto the cortical bone surface and the associated Microdamage of the cortical bone during insertion procedure leads to many a microimplants to fail and dislodge from the cortical bone leading to its failure. Even though, previous studies showed occurrence of microdamage in the cortical bone, they were mainly 2-dimension studies or studies that were invasive to the host. In the present study, we used a non-invasive, non-ionizing imaging technique- Optical Coherence Tomography (OCT), to image and analyze the presence of microdamage along the cortical bone surrounding the microimplant. We inserted 80 microimplants in two different methods (drill and drill free method) and in two different angulations onto the cortical bone surface. Images were obtained in both 2D and 3D imaging modes. In the images, microdamage in form of microcracks on the cortical bone surface around the bone-microimplant interface and micro-elevations of the cortical bone in angulated microimplant insertions and the presence of bone debris due to screwing motion of the microimplant on insertion can be appreciated visually and quantitatively through the depth intensity profile analysis of the images.

Fabrication of Dental Crown by Optical Coherence Tomography: A Pilot Study

“…Optical coherence tomography (OCT) has the capabilities of noncontact, noninvasive, nonionizing, and highresolution scanning with various biomedical applications [25][26][27][28]. OCT has been well-utilized for various studies in dentistry such as for the detection of dental caries and gingival sulcus and the evaluation of dental abfraction and attrition [29][30][31][32][33][34][35]. In addition, quantitative assessment of dental treatments using OCT has been reported such as internal and marginal fitting of dental prosthesis and dental restoration [36][37][38][39].…”

Long-term evaluation of factors affecting removal torque of microimplants

“…Other possible explanation is the angular placement of microimplants. If microimplants were placed at an angle and with the self-drilling method, this might cause surface bone fracture, which could be aggravated with a larger diameter [ 35 ]. Even with increased bone microdamage and root proximity, the bigger microimplants can provide better stability and success rate.…”

Three-dimensional Non-destructive Visualization of Teeth Enamel Microcracks Using X-ray Micro-computed Tomography

“…This is an advantage over the EMCs examination techniques, such as stereomicroscopy 12,13,15,16 , SEM 10,29 , confocal optical profilometry (COP), 3D scanning methods (optical coherence tomography (OCT), ultrasound) 21,22,[30][31][32] , used so far. The employing of µCT in dental studies is of increasing interest, including its applications in enamel thickness and tooth measurements, caries research, enamel white spot lesions and cortical bone microdamage characterisation, root canal morphology and preparation analysis, various types of teeth fractures detection, dental tissue engineering [33][34][35][36][37][38][39][40][41] . Despite the great potential of this technique, no studies utilizing µCT to evaluate the inner tooth structure in the area of EMCs of human teeth have been reported to date.…”