No plane is the best one—the volume is!

Lübbers, Heinz-Theo; Matthews, Felix; Damerau, Georg; Kruse, Astrid L; Obwegeser, Joachim A.; Grätz, Klaus W.; Eyrich, Gerold

doi:10.1016/j.tripleo.2011.05.046

Cited by 10 publications

(5 citation statements)

References 6 publications

(4 reference statements)

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“…It has been reported that the most important factor for IAN injury is the anatomical relationship between the impacted third molar and the IAC [13,14]. However, other authors have emphasized that multiple factors, including surgeon’s experience, surgical technique, institutional setting, and anatomical and radiographic factors are associated with an increased risk of IAC damage [8,15]. …”

Section: Discussionmentioning

confidence: 99%

“…Because this method produces two-dimensional images, it cannot provide information in axial, coronal and sagittal planes [10]. CBCT is a more reliable imaging method in the preoperative assessment of mandibular third molars [10,15,17,19,21,24,27]. In this study, the correlations between preoperative DPR and CBCT findings and intra- and interobserver agreement were investigated.…”

Section: Discussionmentioning

confidence: 99%

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Panoramic radiography and cone-beam computed tomography findings in preoperative examination of impacted mandibular third molars

et al. 2014

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BackgroundPreoperative radiographic examination of impacted mandibular third molars (IMTM) is essential to prevent inferior alveolar nerve injury during extraction. The purpose of this study was to evaluate the correlation between cone-beam computed tomography (CBCT) and digital panoramic radiography (DPR) findings in preoperative examination of IMTM.MethodsThis retrospective study included 298 teeth in 191 individuals. The relationship between the inferior alveolar canal (IAC) and the IMTM (buccal, lingual, interradicular or inferior), the position of the IMTM with respect to the IAC (contact, no contact), the morphologic shape of the mandible in the IMTM region (round, lingual extended, lingual concave), the type of IMTM (vertical, horizontal or angular) and the number of roots of the IMTM were evaluated on CBCT images. DPR images were evaluated for the number of roots of the IMTM and for the most common radiographic findings indicating a relationship between the IAC and the IMTM (darkening of the roots, diversion of the IAC, narrowing of the IAC and interruption of the white line). Data were statistically analyzed with Cramer V coefficient, Kappa statistic, chi-square and Fisher’s exact test.ResultsThere was a significant difference in number of roots detected on DPR versus CBCT images. There was a significant association between the type of IMTM and the morphologic shape of the mandible on CBCT images. Darkening of the roots and interruption of the white line on DPR images were significantly associated with the presence of contact between the IMTM and the IAC on CBCT images.ConclusionsPanoramic radiography is inadequate, whereas CBCT is useful to detect multiple roots of IMTM. When darkening of the roots and interruption of the white line are observed on panoramic images, there is increased likelihood of contact between the IMTM and the IAC. CBCT is required in these cases.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Panoramic radiography and cone-beam computed tomography findings in preoperative examination of impacted mandibular third molars

et al. 2014

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“…Conceivably the unrestricted choice of the sectional plane is also an important influencing variable. For the optimal analysis of a three-dimensional dataset, the examiner must be allowed to freely evaluate all planes of the entire volume rather than being committed to predefined planes (Lübbers et al 2012a;Lübbers et al 2012b). Unfortunately, exact specifications on this are missing in most reports.…”

Section: Discussionmentioning

confidence: 99%

Frequency and anatomy of the retromolar canal – implications for the dental practice

Filo,

Schneider,

L. Kruse

et al. 2015

Swiss Dent. J. SSO

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“…The authors considered the possibility to create a slanted section -with a tangential view of the mandibular canal, by which it can be clearly identified -and of course a clearly defined question as decisive for problem-free evaluation of the images (Lubbers et al 2012). Having access to the volume with the option of selecting individual slices should be the standard today (Lubbers et al 2011b). Especially the volume dataset (in the standardized data format) is indispensable, even if it is meant for further processing in other software programs and applications, such as for implant planning.…”

Section: Discussionmentioning

confidence: 99%

Variations in the anatomical positioning of impacted mandibular wisdom teeth and their practical implications

Schneider,

Filo,

L. Kruse

et al. 2014

Swiss Dent. J. SSO

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Surgical removal of impacted third molars is one of the most frequent procedures in oral surgery. Here, three-dimensional (3D) imaging is often used, yet its necessity is still being heavily debated. The aim of the study was to describe the variation in the anatomical positioning of third mandibular molars, and, by doing so, examine the necessity of 3D imaging. A retrospective case study was performed with the patients from an oral surgery department from January 2009 to February 2013. The primary focus of the study was on the spatial relationship to the mandibular canal, as well as angulation, root configuration, and developmental stage of the wisdom tooth. Descriptive statistics were calculated for these variables. A total of 1197 wisdom teeth in 699 patients were evaluated. 46.7% exhibited direct contact to the mandibular canal, another 28.7% showed close proximity and 24.6% a measurable distance. In 29.0%, the mandibular canal was vestibular and in 23.8% lingual to the wisdom tooth. In 7.4%, it was interradicular and in 0.6% intraradicular. Most teeth had one (21.3%) or two (55.3%) roots. Others had three (17.6%), four (2.0%) or five (0.2%) roots. In 31.4% of the teeth, the root perforated the lingual compact bone, and in 4.3% the vestibular compact bone. 44.4% of the teeth had mesial angulation, 9.7% distal angulation, 35.3% lingual and 2.9% buccal angulation. Due to the anatomical variety, the use of 3D imaging is recommended before surgical removal of mandibular third molars if conventional imaging cannot exclude complicated conditions.

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No plane is the best one—the volume is!

Cited by 10 publications

References 6 publications

Panoramic radiography and cone-beam computed tomography findings in preoperative examination of impacted mandibular third molars

Panoramic radiography and cone-beam computed tomography findings in preoperative examination of impacted mandibular third molars

Frequency and anatomy of the retromolar canal – implications for the dental practice

Variations in the anatomical positioning of impacted mandibular wisdom teeth and their practical implications

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