Comparative assessment of 3D reconstruction technique and Cavalieri’s principle in predicting the mandibular bone defect volumes

Altay, Mehmet Ali; Quereshy, Faisal A.; Nijhawan, S.; Teppa, J.; Horan, Michael P.; Yıldırımyan, Nelli; Baur, Dale A.

doi:10.26650/eor.2018.478

Cited by 2 publications

(2 citation statements)

References 23 publications

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“…Since mandibular defects can lead to obvious functional and cosmetic deformities, the repair and reconstruction of mandibular defects has always been a challenge for surgeons ( 9 - 11 ). Reconstruction of mandible with vascularized free bone myocutaneous flap has become the gold standard for reconstruction surgery, which can greatly improve the aesthetic and functional capacity ( 1 , 2 , 12 , 13 ). The main causes of mandibular excision are as follows: squamous cell carcinoma, ameloblastoma, odontogenic keratocyst, osteosarcoma, and ossifying fibroma.…”

Section: Discussionmentioning

confidence: 99%

“…The reconstruction of mandible with vascularized free bone myocutaneous flap has become a standardized procedure for mandibular reconstruction because it can allow a wide range of mandibular defect composite tissue reconstruction. As microsurgery advances, the success rate of vascular anastomosis has neared 100% ( 1 , 2 ). However, we found that there were still some unsatisfactory cases after mandibular reconstruction.…”

Section: Introductionmentioning

confidence: 99%

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Poor condyle position after mandibular reconstruction and a classification system for patients with “VSCU” based on computed tomography: a cross-sectional study with retrospective data collection

Wang,

He,

Yang

et al. 2024

Quant Imaging Med Surg

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Background Although the application of vascularized free bone muscle flap to reconstruct the mandible has become a standardized approach for mandible reconstruction, the results of its reconstruction are not always satisfactory. The purpose of this study was to identify the types of mandibular and condylar defects by analyzing the unsatisfactory cases of mandibular reconstruction in clinical practice, and to provide some clinical experience of reconstruction. Methods Our study retrospectively analyzed 364 patients who underwent mandibular resection and vascularized free bone flap reconstruction of the mandible and temporomandibular joint (TMJ). We innovatively proposed a “VSCU” classification system (V: vertical position, S: sagittal position, C: coronal position, U: condylar resection is not required) by analyzing computed tomography (CT) scans of mandibular branches and TMJs. Results In all, 221 cases of free iliac muscle flap and 143 cases of fibula muscle flap were included in this study, of which 23 cases had unsatisfactory results after TMJ reconstruction. We classified 23 patients with unsatisfactory mandibular reconstruction according to the “VSCU” classification system. The most common type was U + V + SfC (n=8), followed by V − SfC + U + (n=4), V − s + C + U + (n=3), V − sbcou − (n=3), V − SBC + U + (n=2), V − s + C + U − (n=1). The most common classification was insufficient mandibular rami length, followed by condylar sagittal anteriorization. There was no significant change in the position of condyle on the healthy side during mandibular reconstruction involving condyle. P1 on the affected side was 52.28±4.17 mm before operation and 58.94±5.65 mm after operation, P<0.01; P2 was 12.83±3.49 mm before operation and 24.90±7.15 mm after operation. S2 was 4.54±2.84 mm before operation and 19.10±8.54 mm after operation. A2 was 11.46±3.35 mm before operation and 24.15±8.29 mm after operation. The P values were all less than 0.01, and the differences were statistically significant. Conclusions We propose to use the “VSCU” classification system for accurate 3-dimensional (3D) analysis and positioning, and then obtain accurate models through computer-aided design and manufacturing (CAD/CAM), which can reduce the occurrence of poor reconstruction effect and unreasonable joint position, and is worthy of clinical promotion.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Poor condyle position after mandibular reconstruction and a classification system for patients with “VSCU” based on computed tomography: a cross-sectional study with retrospective data collection

Wang,

He,

Yang

et al. 2024

Quant Imaging Med Surg

View full text Add to dashboard Cite

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Determination of Species‐Specific Differences in Intracranial Volume of Tuj Sheep and Hair Goats Using Stereology and Computed Tomography Methods

Koçyiğit,

Kanik,

Demircioğlu

et al. 2024

Veterinary Medicine & Sci

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The intracranial cavity contains vitally important organs. The brain, cerebellum, meninges and the vessels that supply these organs are located in the intracranial cavity. Therefore, it is important to learn about the intracranial cavity and to study it. However, there is limited information about the intracranial cavity in the veterinary field. The aim of this study was to determine the differences between the intracranial cavities of different species of animals by using stereology and tomography methods, volume calculations and morphometric measurements. In addition, the compatibility of the methods used with each other was investigated. In the study, six male adult goats and six male adult sheep were used. In this study, the intracranial cavities of sheep and goats were calculated by using Cavalieri's principle and 3D modelling using tomography sections. Morphometric measurements were taken over the intracranial space, and index calculations were made. In 3D models using computed tomography, the intracranial volume was 153.31 ± 24.06 cm3 in goats and 128.07 ± 7.93 cm3 in sheep. In the calculation using Cavalieri's principle, it was determined to be 152.73 ± 22.73 cm3 in goats and 126.15 ± 8.38 cm3 in sheep. As a result of the study, the MWCC (maximum width of the cranial cavity) parameter was found to be statistically significant between species (p < 0.05). The two methods used in Bland‐Altman analysis were found to be within the limits of agreement, and the methods can be alternative to each other.

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Comparative assessment of 3D reconstruction technique and Cavalieri’s principle in predicting the mandibular bone defect volumes

Cited by 2 publications

References 23 publications

Poor condyle position after mandibular reconstruction and a classification system for patients with “VSCU” based on computed tomography: a cross-sectional study with retrospective data collection

Poor condyle position after mandibular reconstruction and a classification system for patients with “VSCU” based on computed tomography: a cross-sectional study with retrospective data collection

Determination of Species‐Specific Differences in Intracranial Volume of Tuj Sheep and Hair Goats Using Stereology and Computed Tomography Methods

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