Accuracy of cone beam computed tomography in measuring thicknesses of hard-tissue-mimicking material adjacent to different implant thread surfaces

Abstract

Background/purpose To evaluate the measurement accuracy of hard-tissue thicknesses adjacent to dental implants with different thread designs on images obtained from cone beam computed tomography (CBCT) using an in vitro model. Materials and methods On 4 × 13-mm implant, the neck of the implant was designed with micro-threads, and the apical part was covered by macro-threads; these implants were placed in a vinyl polysiloxane block that mimicked hard-tissue. Models were prepared with various thicknesses of 2.0, 1.0, 0.5 and 0.3 mm adjacent to the dental implant. Each model was scanned using CBCT, and the thickness of the cortical bone from the outer surface of the micro-threads and macro-threads were recorded. Ground sections were prepared, and the thickness was measured with electronic calipers as the gold standard (GS) measurement. Results CBCT measurements of the micro-thread surface were consistently underestimated compared to the GS measurement when the thickness of the hard-tissue-mimicking material was ≤1.0 mm. In comparison, CBCT measurements of the macro-thread surface closely approximated the standard measurement, except when the thickness of the hard-tissue-mimicking material was 0.3 mm. The mean percentage errors from the standard measurement for the 2.0-, 1.0-, 0.5-, and 0.3-mm thickness groups were 4.8%, 16.4%, 37.8%, and 92.6%, respectively, for the micro-thread group, and were 0.6%, 2.9%, 9.5%, and 40.8%, respectively, for the macro-thread group. Conclusion Within the limitations of this study, we conclude that CBCT may not produce sufficient resolution for thin sections of hard tissue-mimicking materials adjacent to micro-thread surfaces.

Esthetics and bone changes of immediate implants with or without vascularized interpositional periosteal connective tissue grafting: A 2‐year randomized controlled trial

“…Finding an accurate yet non‐invasive method to assess implant buccal bone has been challenging. Direct clinical assessment that involves flap reflection is invasive whereas radiographic CBCT assessment has its limitations (Benic et al, 2013; González‐Martín et al, 2016; Pelekos et al, 2018; Tyndall et al, 2012) where thin facial alveolar bone shows less accurately in CBCT than reality (González‐Martín et al, 2016; Razavi et al, 2010; Vanderstuyft et al, 2019; Yen et al, 2019) found that about 60% of the cases buccal bone was not visible.…”

Evaluation of buccal bone resorption in immediate implant placement in thin versus thick buccal bone plates: An 18‐month follow‐up prospective cohort study

“…Radiographic CBCT assessment is less invasive but has its limitations in terms of accuracy, especially concerning detecting thin facial bone. Buccal bone is less accurately exhibited in CBCT, underestimating thin bone dimension, further complicating assessment 15–21 . To eliminate the shortcomings of the CBCT, the buccal bone changes measuring device introduced by 22 have proven itself to be more accurate and less invasive 23–25 …”

“…Buccal bone is less accurately exhibited in CBCT, underestimating thin bone dimension, further complicating assessment. [15][16][17][18][19][20][21] To eliminate the shortcomings of the CBCT, the buccal bone changes measuring device introduced by 22 have proven itself to be more accurate and less invasive. [23][24][25] Accordingly, this prospective clinical trial was designed to examine the effect of labial bone thickness on the buccal bone resorption in immediate implants and assess the accuracy of buccal bone measurement methods using two different techniques.…”

Hydro Magnetic Effect on Thread Stretching Surface with Mounted Obstacles in Porous Medium

“…For the first time, cotton threads formed a microfluidic system that was used to conduct a fast and simple Turkevich synthesis of gold nanoparticles (AuNPs) using minute amounts of chemicals. Yen et al [4] studied and examined the topic that Cone beam computed tomography accuracy in determining the thickness of hardtissue-mimicking material close to various implant thread surfaces. Using an in vitro model, assess the measuring accuracy of hard-tissue thicknesses close to dental implants using various thread patterns on images generated from cone beam computed tomography (CBCT).…”