Study on the necessity for cross‐section imaging of the posterior mandible for treatment planning of standard cases in implant dentistry

Frei, C.; Buser, Daniel; Dula, Karl

doi:10.1111/j.1600-0501.2004.01032.x

Cited by 68 publications

(90 citation statements)

References 26 publications

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“…[12][13][14][15][16] In our study, we found changes in length in about 60% of cases not using CBCT (40% remained unchanged), similar to the results by Schropp et al 13 who found changes in 70% of cases. Ekestubbe and Grondahl 12 detected a 70% agreement in the dimensions of the selected implants, between the planning stages, using conventional tomography and the dimensions at surgery, similar to our results (69.5% agreement for length and 73.7%, for width).…”

Section: Discussionsupporting

confidence: 91%

Impact of cone-beam computed tomography on implant planning and on prediction of implant size

et al. 2014

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Abstract:The aim was to investigate the impact of cone-beam computed tomography (CBCT) on implant planning and on prediction of final implant size. Consecutive patients referred for implant treatment were submitted to clinical examination, panoramic (PAN) radiography and a CBCT exam. Initial planning of implant length and width was assessed based on clinical and PAN exams, and final planning, on CBCT exam to complement diagnosis. The actual dimensions of the implants placed during surgery were compared with those obtained during initial and final planning, using the McNemmar test (p < 0.05). The final sample comprised 95 implants in 27 patients, distributed over the maxilla and mandible. Agreement in implant length was 50.5% between initial and final planning, and correct prediction of the actual implant length was 40.0% and 69.5%, using PAN and CBCT exams, respectively. Agreement in implant width assessment ranged from 69.5% to 73.7%. A paired comparison of the frequency of changes between initial or final planning and implant placement (McNemmar test) showed greater frequency of changes in initial planning for implant length (p < 0.001), but not for implant width (p = 0.850). The frequency of changes was not influenced by implant location at any stage of implant planning (chi-square test, p > 0.05). It was concluded that CBCT improves the ability of predicting the actual implant length and reduces inaccuracy in surgical dental implant planning.

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Section: Discussionsupporting

confidence: 91%

Impact of cone-beam computed tomography on implant planning and on prediction of implant size

et al. 2014

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“…4 It is widely used as a standard radiographic examination tool in implant treatment, [1][2][3][4] and allows evaluation of the available bone height before inserting posterior mandibular implants. [4][5][6] Taking into account the panoramic unit's magnification factor, 5 and in accordance with the recommendations for implants placed above the inferior alveolar nerve, a safety margin of at least 2 mm between the implant's tip and the mandibular canal is recommended.…”

Section: Discussionmentioning

confidence: 99%

“…[1][2][3][4][5] Furthermore, panoramic radiographs have been reported to be sufficiently reliable to evaluate the available bone height before inserting posterior mandibular implants. [4][5][6] Image distortion, due to variations in the degree of magnification in the horizontal and vertical planes, is well described for conventional film-based panoramic radiography.…”

Section: Introductionmentioning

confidence: 99%

“…Owing to varying magnification, reference objects with known dimensions are required to determine the exact magnification in a particular area. 3,5,9,[12][13][14] On conventional panoramic radiographs, dental implants of known length are easily measured with a sliding calliper to determine the unit's magnification factor. 5 In digital panoramic radiography, magnification can be adjusted with a reference ball calibration method that allows 1:1 image visualization on the screen and the use of software-based measurement tools.…”

Section: Introductionmentioning

confidence: 99%

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Accuracy of vertical height measurements on direct digital panoramic radiographs using posterior mandibular implants and metal balls as reference objects

Vazquez¹,

Nizamaldin²,

Combescure³

et al. 2013

Dentomaxillofacial Radiology

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Objectives: Conventional panoramic radiography, a widely used radiographic examination tool in implant treatment planning, allows evaluation of the available bone height before inserting posterior mandibular implants. Image distortion and vertical magnification due to projection geometry is well described for rotational panoramic radiographs. To assess the accuracy of vertical height measurements on direct digital panoramic radiographs, implants and metal balls positioned in the posterior mandible were used as radio-opaque reference objects. The reproducibility of the measuring method was assessed by the inter-and intraobserver agreements. Methods: Direct digital panoramic radiographs, performed using a Kodak 8000C (Eastman Kodak Company, Rochester, NY), of 17 partially edentulous patients (10 females, 7 males, mean age 65 years) were selected from an X-ray database gathered during routine clinical evaluation of implant sites. Proprietary software and a mouse-driven calliper were used to measure the radiological length of 25 implants and 18 metal reference balls, positioned in mandibular posterior segments. The distortion ratio (DR) was calculated by dividing the radiological implant length by the implant's real length and the radiological ball height by the ball's real height. Results: Mean vertical DR was 0.99 for implants and 0.97 for balls, and was unrelated to mandibular sites, side, age, gender or observer. Inter-and intraobserver agreements were acceptable for both reference objects. Conclusions: Vertical measurements had acceptable accuracy and reproducibility when a software-based calibrated measurement tool was used, confirming that digital panoramic radiography can be reliably utilized to determine the pre-operative implant length in premolar and molar mandibular segments. Dentomaxillofacial Radiology (

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“…It is then worrying that there is such a frequent use of CT (53% of the respondents prescribing cross-sectional imaging) among the respondents. It has been widely recorded by many researchers [21][22][23] that if bone width and lingual undercut can be estimated suffi ciently well during clinical examination then a panoramic fi lm is accurate enough to obtain the information regarding implant length. Therefore, this CT frequency could be attributed to the availability of the device in regional hospitals or even over-zealousness, or worse still manufacturer-generated implant drillguidance software.…”

Section: -S E C T I O N S I N T H E M a X I L L A ( M U L T I P L Ementioning

confidence: 99%

Pre-operative radiographs for dental implants – are selection criteria being followed?

McCrea

2008

Br Dent J

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Study on the necessity for cross‐section imaging of the posterior mandible for treatment planning of standard cases in implant dentistry

Cited by 68 publications

References 26 publications

Impact of cone-beam computed tomography on implant planning and on prediction of implant size

Impact of cone-beam computed tomography on implant planning and on prediction of implant size

Accuracy of vertical height measurements on direct digital panoramic radiographs using posterior mandibular implants and metal balls as reference objects

Pre-operative radiographs for dental implants – are selection criteria being followed?

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