Depth deviation and occurrence of early surgical complications or unexpected events using a single stereolithographic surgi-guide

Cassetta, Michele; Stefanelli, Luigi Vito; Giansanti, M.; Mambro, A. Di; Calasso, Sabrina

doi:10.1016/j.ijom.2011.09.009

Cited by 57 publications

(46 citation statements)

References 12 publications

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“…Therefore, the better results obtained in the present study were probably due to the fact that an extraoral radiopaque marker had been used, namely a well-defined geometric device in which a total of 300,000 points were scanned and overlapped during the matching procedure within the planning software, allowing a greater accuracy in the superimposition of the DICOM data and radiological stent as compared to standard protocols in which only a limited number of reference points are used. Furthermore, most of the studies contemplated a double scanning procedure, in which both the patient and the radiological template were subjected to a CT scan [36,39,40]. In contrast, in the present study, the radiological stent underwent an optical scan, providing STL data that, unlike with the CT scan, did not depend on the Hounsfield unit threshold based on the grey-level segmentation defined by the radiologist.…”

Section: Discussionmentioning

confidence: 93%

“…In particular, Di Giacomo et al [13] found an implant axis deviation within 7.25°±2.67°; the differences in distance between the planned and the placed positions at the implant shoulder were 1.45±1.42 mm, and 2.99±1.77 mm at the implant apex; further, Ozan et al [37] and Ersoy et al [23] showed higher deviations, as listed before. According to Cassetta et al [39], it was found that the use of three osteosynthesis screws, placed in a tripod formation, was sufficient to provide the necessary stability, thereby improving the system accuracy. Furthermore, unlike bone screws, bone pins were guided into dedicated sleeves with a limited planned depth, in order to prevent surgical template deformations caused by excessive fixing pressures.…”

Section: Discussionmentioning

confidence: 99%

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Accuracy of computer-aided template-guided oral implant placement: a prospective clinical study

Beretta

Poli

Maiorana

2014

J Periodontal Implant Sci

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PurposeThe aim of the present study was to evaluate the in vivo accuracy of flapless, computer-aided implant placement by comparing the three-dimensional (3D) position of planned and placed implants through an analysis of linear and angular deviations.MethodsImplant position was virtually planned using 3D planning software based on the functional and aesthetic requirements of the final restorations. Computer-aided design/computer-assisted manufacture technology was used to transfer the virtual plan to the surgical environment. The 3D position of the planned and placed implants, in terms of the linear deviations of the implant head and apex and the angular deviations of the implant axis, was compared by overlapping the pre- and postoperative computed tomography scans using dedicated software.ResultsThe comparison of 14 implants showed a mean linear deviation of the implant head of 0.56 mm (standard deviation [SD], 0.23), a mean linear deviation of the implant apex of 0.64 mm (SD, 0.29), and a mean angular deviation of the long axis of 2.42° (SD, 1.02).ConclusionsIn the present study, computer-aided flapless implant surgery seemed to provide several advantages to the clinicians as compared to the standard procedure; however, linear and angular deviations are to be expected. Therefore, accurate presurgical planning taking into account anatomical limitations and prosthetic demands is mandatory to ensure a predictable treatment, without incurring possible intra- and postoperative complications.Graphical Abstract

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Section: Discussionmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Accuracy of computer-aided template-guided oral implant placement: a prospective clinical study

Beretta

Poli

Maiorana

2014

J Periodontal Implant Sci

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“…3,5,6,[10][11][12][13] With CT, bone density measurements are given in HU based on density values for air (-1,000 HU) and pure water (0 HU). 3,5,6,[10][11][12][13] With CT, bone density measurements are given in HU based on density values for air (-1,000 HU) and pure water (0 HU).…”

Section: The Relationship Between Cbct-and Ct-based Gray Density Valumentioning

confidence: 99%

“…4 Several studies have proposed a variety of methods for assessing bone density, but these involve evaluation either at the time of implant site preparation or subsequent to implant placement. 3,5,6 Even more recently, due to the need for less expensive image acquisition protocols or for scanners with lower radiation dose, cone beam CT (CBCT) has been widely employed for oral and maxillofacial imaging, 7 as it seems to provide good spatial resolution, gray density range, and contrast, as well as a good pixel/noise ratio. 3,5,6 Even more recently, due to the need for less expensive image acquisition protocols or for scanners with lower radiation dose, cone beam CT (CBCT) has been widely employed for oral and maxillofacial imaging, 7 as it seems to provide good spatial resolution, gray density range, and contrast, as well as a good pixel/noise ratio.…”

Section: Introductionmentioning

confidence: 99%

How Accurate Is CBCT in Measuring Bone Density? A Comparative CBCT‐CT In Vitro Study

Cassetta

Stefanelli

Pacifici

et al. 2013

Clin Implant Dent Rel Res

114

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“…The quality, quantity, and density of the jaw are important factors in implant treatment (3). Besides, mechanical characteristics are an important factor in Osseo integration and primary stability of the implant (4–8). Accurate information of bone structure will help the clinician to select the proper site, treatment plan, and surgical procedure for implant surgery (9).…”

Section: Introductionmentioning

confidence: 99%

Accuracy of densitometry of two cone beam computed tomography equipment in comparison with computed tomography

et al. 2017

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BackgroundThe use of oral implants has been growing, and cone beam computerized tomography (CBCT) has become the method of choice for oral and maxillofacial radiology.ObjectiveTo assess the accuracy of bone densitometry in two different CBCT devices in comparison with MDCT (multi-detector CT).MethodsDifferent concentrations of urografin, including 2.5%, 5%, 7.5%, 10%, 12.5%, were prepared, and the Hounsfield unit of these solution was measured by two CBCT devices (SORDEX CRANEX 3D and NEWTOM 5G) and one spiral CT device (SOMATOM SENSATION). Difference of output Hounsfield units in each concentration was compared in three devices. Correlation of devices with increase of urografin dose also was evaluated. Statistical analyses of the data were performed using SPSS18 and Kruskal–Wallis and Mann–Whitney U tests, along with Spearman’s correlation coefficient.ResultsThe range of gray density for NEWTOM 5G CBCT, SORDEX 3D CBCT, and SOMATOM CT imaging systems was from 781 to 2311, 427 to 1464, and 222 to 994, respectively. There was significant difference between devices in the Hounsfield unit in all urografin concentrations (p<0.001). Also there was a significant correlation between three devices with increasing the urografin dose (p<0.05; r>0.95)ConclusionOur findings indicated a high correlation and linear relationship between different studied imaging systems. Although utilizing CBCT in the assessment of bone density is useful according to its lower emitted dose and less cost, clinicians should be aware of the issue that the voxel value in CBCT is not as perfect as CT.

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Depth deviation and occurrence of early surgical complications or unexpected events using a single stereolithographic surgi-guide

Cited by 57 publications

References 12 publications

Accuracy of computer-aided template-guided oral implant placement: a prospective clinical study

Accuracy of computer-aided template-guided oral implant placement: a prospective clinical study

How Accurate Is CBCT in Measuring Bone Density? A Comparative CBCT‐CT In Vitro Study

Accuracy of densitometry of two cone beam computed tomography equipment in comparison with computed tomography

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