Alveolar bone height according to the anatomical relationship between the maxillary molar and sinus

Choi, Yoorim; Kim, Young Hyun; Han, Sang-Sun; Jung, Ui Won; Lee, Chena; Lee, Ari; Jeon, Kug Jin

doi:10.5051/jpis.2020.50.1.38

Cited by 14 publications

(12 citation statements)

References 23 publications

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“…Since the majority of the upper teeth protrude into the maxillary sinus, identifying the maxillary floor on CBCT prior to tooth extraction is critical for avoiding sinus surgery [ 35 ]. Additionally, the distance between the tooth root and the sinus floor impacts the effectiveness of dental implant surgery [ 36 ], and dental clinicians have expressed interest in being able to clearly define the sinus floor on CBCT. For the examination of TMJ disease, CBCT is preferred over MDCT as a general strategy for the current clinical situation [ 37 ].…”

Section: Discussionmentioning

confidence: 99%

Multi-planar 2.5D U-Net for image quality enhancement of dental cone-beam CT

et al. 2023

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Cone-beam computed tomography (CBCT) can provide 3D images of a targeted area with the advantage of lower dosage than multidetector computed tomography (MDCT; also simply referred to as CT). However, in CBCT, due to the cone-shaped geometry of the X-ray source and the absence of post-patient collimation, the presence of more scattering rays deteriorates the image quality compared with MDCT. CBCT is commonly used in dental clinics, and image artifacts negatively affect the radiology workflow and diagnosis. Studies have attempted to eliminate image artifacts and improve image quality; however, a vast majority of that work sacrificed structural details of the image. The current study presents a novel approach to reduce image artifacts while preserving details and sharpness in the original CBCT image for precise diagnostic purposes. We used MDCT images as reference high-quality images. Pairs of CBCT and MDCT scans were collected retrospectively at a university hospital, followed by co-registration between the CBCT and MDCT images. A contextual loss-optimized multi-planar 2.5D U-Net was proposed. Images corrected using this model were evaluated quantitatively and qualitatively by dental clinicians. The quantitative metrics showed superior quality in output images compared to the original CBCT. In the qualitative evaluation, the generated images presented significantly higher scores for artifacts, noise, resolution, and overall image quality. This proposed novel approach for noise and artifact reduction with sharpness preservation in CBCT suggests the potential of this method for diagnostic imaging.

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Section: Discussionmentioning

confidence: 99%

Multi-planar 2.5D U-Net for image quality enhancement of dental cone-beam CT

et al. 2023

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“…The distance (FSD) from the sinus floor (SF) to the molar furcation in the mid-most CBCT slice was recorded as described by Choi et al (Figure 3). 17 The shortest distance to SF from each root apex was recorded in the coronal slice (Figure 4).…”

Section: Methodsmentioning

confidence: 99%

“…The distance (FSD) from the sinus floor (SF) to the molar furcation in the mid-most CBCT slice was recorded as described by Choi et al ( Figure 3 ). 17 …”

Section: Methodsmentioning

confidence: 99%

“…Previous studies using coronal and sagittal CBCT images have reported average distances from root apices to the sinus floor, [13][14][15][16] and between molar furcation and sinus floor. 17 However, none have addressed any dimensional differences in these parameters between first and second molars. Accordingly, the present study used CBCT data to assess the buccopalatal and mesiodistal widths of maxillary molar IRS at three different levels (crestal, middle, and apical) as well as assessments of both root apex and furcation proximities to the sinus floor (SF) and comparisons of these measurements between first and second molar sites before extraction.…”

Section: Introductionmentioning

confidence: 99%

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CBCT data relevant in treatment planning for immediate maxillary molar implant placement

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Dastgurdi

Azadeh³

et al. 2021

J Adv Periodontol Implant Dent

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Background. This study used CBCT images to evaluate the suitability of maxillary first and second molar sites to receive immediate implants. Buccopalatal and mesiodistal widths of maxillary molar inter-radicular septum were evaluated at three different levels (crestal, middle, and apical), in addition to assessments of the root apex and furcation proximities to the sinus floor and comparisons of these measurements between the first and second upper molar sites before extraction.Methods. A total of 427 dental sites from 223 patients were used to measure the buccopalatal and mesiodistal widths of inter-septal/furcal (IRS) bone of maxillary first and second molars and vertical distances from the furcation and from all the root apices to the sinus floor (SF).Results. Mean coronal-most buccopalatal/mesiodistal IRS widths were 7.33/6.52 mm for the first and 6.86/5.85 mm for the second molars (P=0.008). Corresponding mean FSD (furcation-sinus floor) values were 9.69 mm (range: 2.02-24.68 mm) and 8.84 mm (range: 1.48-25.09 mm). Mean distances from all the root apices to SF were <3 mm. The palatal roots of the first molars had higher sinus intrusion rates (28.85%) than their buccal counterparts, while for the second molars, the mesiobuccal roots showed the highest sinus intrusion (37.65%).Conclusion. In the current patient sample, 61.7% of the first and 34% of the second molars had a sufficiently broad IRS to encase a 5-mm-diameter IMI (immediate molar implant) completely. The mean FSD of 9 mm for both molars indicated that some sinus floor elevation would likely be needed unless short implants were used.

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“…However, at sites in the upper molar region, the alveolar bone height is less than that at other sites, and the effects of alveolar bone resorption after tooth extractions should also be considered. Therefore, implant placement may be difficult, or impossible, without bone augmentation procedures, such as a sinus lift [ 4 – 6 ]. While the sinus lift procedure is an established treatment option [ 7 – 9 ], the most suitable choice of bone-filling material is unclear, and novel bone-filling materials are currently under development [ 10 – 12 ].…”

Section: Introductionmentioning

confidence: 99%

Comparison of the performances of low-crystalline carbonate apatite and Bio-Oss in sinus augmentation using three-dimensional image analysis

et al. 2021

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Background In locations where the alveolar bone height is low, such as at the maxillary molars, implant placement can be difficult, or even impossible, without procedures aimed at generating new bone, such as sinus lifts. Various types of bone graft materials are used after a sinus lift. In our study, a three-dimensional image analysis using a volume analyzer was performed to measure and compare the volume of demineralized bovine bone mineral (Bio-Oss®) and carbonate apatite (Cytrans®) after a sinus lift, as well as the amount of bone graft material resorption. Patient data were collected from cone-beam computed tomography images taken before, immediately following, and 6 months after the sinus lift. Using these images, both the volume and amount of resorption of each bone graft material were measured using a three-dimensional image analysis system. Results The amount of bone resorption in the Bio-Oss®-treated group was 25.2%, whereas that of the Cytrans®-treated group was 14.2%. A significant difference was found between the two groups (P < 0.001). Conclusions Our findings indicate that the volume of bone resorption was smaller in the Cytrans®-treated group than in the Bio-Oss®-treated group, suggesting that Cytrans® is more promising for successful implant treatments requiring a sinus lift.

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Alveolar bone height according to the anatomical relationship between the maxillary molar and sinus

Cited by 14 publications

References 23 publications

Multi-planar 2.5D U-Net for image quality enhancement of dental cone-beam CT

Multi-planar 2.5D U-Net for image quality enhancement of dental cone-beam CT

CBCT data relevant in treatment planning for immediate maxillary molar implant placement

Comparison of the performances of low-crystalline carbonate apatite and Bio-Oss in sinus augmentation using three-dimensional image analysis

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