Volumetry of simulated bone grafts in the edentulous maxilla by computed tomography: an experimental study

Johansson, B; Grepe, A; Wannfors, K; Åberg, P; Hirsch, Jan‐Michaél

doi:10.1038/sj.dmfr.4600600

Cited by 44 publications

(60 citation statements)

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“…Our results are in accordance with previous reports of grafted sinuses [4,12,21,22,26,34,37,38]. Dellavia et al [34] reported a total bone volume change of 19 % in 6 months following sinus augmentation when using a mixture of autogenous bone (30 %) and bovine bone matrix (BioOss Ò , Geistlich Pharma AG, Wolhusen, Switzerland) (70 %).…”

Section: Discussionsupporting

confidence: 83%

“…In a comparable study [22], patients augmented with a mixture of Bio-Oss (Geistlich Pharma AG) and autogenous bone (4:1) exhibited small (10 %) but statistically significant changes in the graft site after 1 year of loading. Johansson et al [21] evaluated volume change in autogenous bone grafts, and found an average volume loss of approximately 49.5 %. In composite grafts consisting of autologous bone mixed with different bone graft substitutes, maintenance of bone graft height was significantly better in a combination of intraoral autogenous grafts and allograft versus allografts alone [38].…”

Section: Discussionmentioning

confidence: 99%

“…However, these studies differ in radiographic methods, using panoramic radiographs [18, 22-24, 29, 33], computed tomography (CT) [9,21,23,26] or cone beam computed tomography (CBCT) [8,22,32,34].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Three-Dimensional Volumetric Changes After Sinus Floor Augmentation with Mineralized Cortical Bone Allograft

Berbéri

Bouserhal

Nader

et al. 2014

J. Maxillofac. Oral Surg.

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Aim The aim of this retrospective study was to quantify three-dimensional (3D) volumetric bone changes over a two-year period in maxillary sinuses augmented with a mineralized cortical bone allograft material (MCBA) material. Patients and Methods Eleven patients (6 males and 5 females) with mean of age of 51.6 (range: 46-61) years were treated to increase the vertical dimension of the alveolar crest by maxillary sinus floor augmentation procedure. Study data were collected from patient records and by analyzing preoperative radiographs and cone beam computed tomography (CBCT) scans taken within the first two weeks after maxillary sinus lift (T0), immediately before implant placement four months after grafting (T1), and after one year of implant loading (T2). All DICOMformatted images were rendered into volumetric images using software that automatically calculated the volume of the grafted material in cubic centimeters. Results Mean graft volume was 16.24 ± 1.54 cm 3 at T0, 14.48 ± 1.48 cm 3 at T1 and 13.06 ± 1.39 cm 3 at T2. Mean volume retraction resulted in 1.76 ± 0.34 cm 3 DV1 (T0-T1) and 1.42 ± 0.4 cm 3 DV2 (T1-T2) and was 10.83 % of the initial total volume at (T0-T1) and 9.8 % of the total volume (T1-T2). Conclusion The present retrospective investigation demonstrated a 20.63 % decrease in graft volume. Volumetric 3D assessment of CBCT scans with the selected software appeared to be a promising approach to quantifying longterm changes in the grafted area.

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Section: Discussionsupporting

confidence: 83%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of Three-Dimensional Volumetric Changes After Sinus Floor Augmentation with Mineralized Cortical Bone Allograft

Berbéri

Bouserhal

Nader

et al. 2014

J. Maxillofac. Oral Surg.

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“…In a comparable ex vivo study, plaster of Paris was used as a simulation material for bone grafting. 9 However, this highly radio-opaque material is readily easily distinguishable on radiographs and can therefore be considered an unrealistic simulation, leading to overestimation of the accuracy of CT tomographic measurements. In another recent study, the researchers used a radio-opaque dental impression material to simulate the bone graft and they reported that CBCT was a reliable assessment tool to follow up incremental changes in graft volumes.…”

Section: Discussionmentioning

confidence: 99%

“…Two reports could be identified assessing the accuracy of CT in following graft volume changes in one study Paris was used as a simulation material, while in the other study radiopaque impression material was applied. 9,10 The aim of the study was to assess CBCT accuracy in measuring changes in the autogenous bone graft volume in human cadavers.…”

Section: Introductionmentioning

confidence: 99%

Accuracy of cone beam computed tomography in following simulated autogenous graft resorption in maxillary sinus augmentation procedure: anex vivostudy

Umanjec-Korac¹,

Parsa²,

Nikoozad³

et al. 2016

Dentomaxillofacial Radiology

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Objectives: Maxillary sinus augmentation is a well-documented procedure with long-term success in implant dentistry. Assessing graft volume changes over time is crucial, since resorption remains a major concern. CBCT is commonly employed to assess the quantity and quality of the available bone at the implant receptor site. However, its applicability in following graft volume changes is yet to be determined. The study aimed to assess CBCT accuracy in following simulated graft resorption ex vivo. Methods: 4 differently sized autogenous bone blocks harvested from the zygomatic buttress were bilaterally placed in the maxillary sinus of 12 human cadavers. The Accuitomo (J Morita, Kyoto, Japan) CBCT system was employed to scan each one of the 4 grafts in each of the 12 cadavers using identical settings. Gold standard graft measurements were obtained using micro-CT. One independent observer assessed the volume of each graft on CBCT images twice. Intraobserver reliability was assessed using Cohen's kappa and one-sample t-test was used to compare CBCT with micro-CT volumetric measurements. Results: The mean micro-CT graft volumes were 97.12 ± 1.4, 197.32 ± 3.4, 361.41 ± 4.2 and 1040.11 ± 3.2 mm 3 for Grafts 1-4, respectively, and the mean CBCT volumes of the corresponding grafts were 115. 39 ± 7.01, 205.97 ± 9.91, 404.05 ± 16.81 and 1138.04 ± 20.98 mm 3 . CBCT measurements were statistically significantly different from micro-CT measurements (p 5 0.001). Intraobserver reliability was good (r 5 0.78). Conclusions: In every case, CBCT overestimated the maxillary graft volume in comparison with micro-CT. However, the measurement differences were limited and might not influence clinical performance.

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Maxillary sinus floor elevation with a tissue-engineered bone composite of deciduous tooth stem cells and calcium phosphate cement in goats

Zhao

Hao

et al. 2014

J Tissue Eng Regen Med

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The study aimed to assess the effect of maxillary sinus floor elevation with tissue-engineered bone constructed from deciduous tooth stem cells (DTSCs) and calcium phosphate cement (CPC). The stem cells from goat deciduous teeth (SGDs) were isolated and transfected by means of the adenovirus with an enhanced green fluorescent protein gene (AdEGFP). As many as 18 bilateral maxillary sinuses of nine goats were randomly allocated into three groups (n = 6/group): group A (SGDs-CPC compound), group B (CPC alone) and group C (autogenous bone obtained from an iliac crest). All the samples were evaluated by computed tomography (CT), histology and histomorphometric analysis. Furthermore, the fate of implanted SGDs was traced using an immunohistochemical staining method in the decalcified samples. SGDs might be differentiated into osteoblasts in an osteogenic medium. In the present study, three-dimensional CT analysis showed that the volume of newly formed bone in group A was greater than that in the other two groups. After a healing period of 3 months, sequential analyses of triad-colour fluorescence labelling, histology and histomorphology indicated that the SGDs-CPC compound primarily promoted bone formation and mineralization at 2 and 3 months after the operation. Moreover, the areas of new bone formation in elevated sinuses were 41.82 ± 6.24% in the SGDs-CPC group, which was significantly higher than the 30.11 ± 8.05% in the CPC-alone group or the 23.07 ± 10.21% in the autogenous bone group. Immunohistochemical staining revealed that GFP and OCN were both expressed in the new bone tissue for the samples with eGFP, which suggested that the implanted SGDs might have contributed to new bone formation on the elevated sinus floor. SGDs can promote new bone formation and maturation in the goat maxillary sinus, and the tissue-engineered bone composite of SGDs and CPC might be a potential substitute for existing maxillary sinus floor elevation methods. Copyright © 2014 John Wiley& Sons, Ltd.

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Volumetry of simulated bone grafts in the edentulous maxilla by computed tomography: an experimental study

Cited by 44 publications

References 0 publications

Evaluation of Three-Dimensional Volumetric Changes After Sinus Floor Augmentation with Mineralized Cortical Bone Allograft

Evaluation of Three-Dimensional Volumetric Changes After Sinus Floor Augmentation with Mineralized Cortical Bone Allograft

Accuracy of cone beam computed tomography in following simulated autogenous graft resorption in maxillary sinus augmentation procedure: anex vivostudy

Maxillary sinus floor elevation with a tissue-engineered bone composite of deciduous tooth stem cells and calcium phosphate cement in goats

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