Observation of the Internal Structure of the Zygomatic Bone by Micro-Computed Tomography

Kato, Yorihisa; Kizuo, Yasuhiro; Tonogi, Morio; Ide, Yoshinobu; Yamane, Gen-yuki

doi:10.1016/s1349-0079(04)80027-6

Cited by 12 publications

(11 citation statements)

References 16 publications

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“…Except for one histological analysis (Nkenke et al, 2003), the zygomatic bone quality was assessed, thus far, by three microCT-based trials assessing Japanese specimens (Kato et al, 2004(Kato et al, , 2005Yoshino et al, 2007). A tooth-loss-dependent change in the trabecular structure of the zygomatic bone was described; dentate specimens presented a higher trabecular bone density, thicker trabeculae, and a more plate-like and constantly oriented trabecular structure (Kato et al, 2004;Yoshino et al, 2007). These differences were enforced in the area of the Jugale point (defined as the most concave point between the lateral margin of the upper zygomatic bone and the upper margin of the zygomatic arch), where masseter muscle and fascia temporalis adhere.…”

Section: Discussionmentioning

confidence: 99%

“…For zygomatic bone, studies on its quantity are available (Uchida et al, 2001;Nkenke et al, 2003;Van Steenberghe et al, 2003;Corvello et al, 2011;Balshi et al, 2012), but data on its quality are still scarce and, except for one histological study by Nkenke et al (2003), are restricted to Japanese populations (Kato et al, 2004(Kato et al, , 2005Yoshino et al, 2007). Possible differences due to ethnicity (Uchida et al, 2001;Nkenke et al, 2003;Liu et al, 2011;Kim et al, 2013b;Putman et al, 2013) and the technique applied for bone analysis (histomorphometry vs. micro-computed tomography (microCT)) (Chappard et al, 2005;Bonnet et al, 2009), and the lack of an intraindividual comparison with the maxilla, triggered the present microCT-based study to assess the trabecular bone quality of the zygomatic bone and compare it with the anterior and posterior maxilla.…”

Section: Introductionmentioning

confidence: 99%

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MicroCT-based evaluation of the trabecular bone quality of different implant anchorage sites for masticatory rehabilitation of the maxilla

Bertl

Heimel

Rökl-Riegler

et al. 2015

Journal of Cranio-Maxillofacial Surgery

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a b s t r a c tIn the severely atrophied maxilla, implant anchorage in the zygomatic bone is considered a viable alternative to conventional dental implants with preceding bone augmentation procedures. The present microCT-based study compared the trabecular bone quality of the maxilla and zygomatic bone. MicroCT scanning was conducted in 12 halves of cadaver heads (5 male, 7 female) with edentulous, atrophied maxillae. Relevant trabecular bone quality parameters were determined in the anterior and posterior maxilla and in the zygomatic bone and compared by region and sex. Any difference in mean values between the anterior maxilla and the zygomatic bone was insignificant. Comparison of both with the posterior maxilla presented significantly higher values for bone volume fraction, surface density, and trabecular thickness and number, and significantly lower values for specific bone surface, structure model index, and trabecular separation. A significant sex-specific difference was not detected. The present microCT-based analysis is, to the best of our knowledge, the first intra-individual comparison of different implant anchorage sites for masticatory rehabilitation of the maxilla. The trabecular compartment of the zygomatic bone offered bone quality and, thus, an implant bed comparable with those of the anterior maxilla, and both were superior to the posterior maxilla.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

MicroCT-based evaluation of the trabecular bone quality of different implant anchorage sites for masticatory rehabilitation of the maxilla

Bertl

Heimel

Rökl-Riegler

et al. 2015

Journal of Cranio-Maxillofacial Surgery

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show abstract

“…This resulted in a bending moment when connections between implant-abutment joints and the interface between the alveolar bone and implants acted as fulcra, and metal fatigue caused abutment loosening 11 and fracture. One study discovered that inclinations of 45-758 relative to the occlusal plane did not affect implant prognosis 3 , and several other studies have documented that the zygomatic bone is anatomically composed of thick trabecular structures that enable the tolerance of occlusal force 10,22 . When considering long-term prognosis, 2 implants are preferable to 1 implant in order to disperse the stress more efficiently.…”

Section: Discussionmentioning

confidence: 99%

Biomechanical three-dimensional finite-element analysis of maxillary prostheses with implants. Design of number and position of implants for maxillary prostheses after hemimaxillectomy

Miyamoto¹,

Ujigawa²,

Kizu³

et al. 2010

International Journal of Oral and Maxillofacial Surgery

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“…Due to this high bone density, zygomatic implants have gained a cortical anchorage with a good initial fixation 13,14,17 . Van Steenberghe et al 21 reported in a recent study on cadavers thatthe mean length of the zygomatic bone was 14.1 4.7 mm, allowing the insertion of zygomatic implants as described above.…”

Section: Discussionmentioning

confidence: 99%

Three-dimensional finite elemental analysis of zygomatic implants in craniofacial structures

Ujigawa

Kato

Kizu

et al. 2007

International Journal of Oral and Maxillofacial Surgery

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The objective of this study to analyze stress distribution in craniofacial structures of zygomatic osseointegrated implants.An integrated system for DICOM data was utilized to create a three-dimensional model of craniofacial structures. The stress analysis was merely comparative, allowing us to relate the amount and distribution of the main stresses.The stress analysis was performed using the three-dimensional finite elemental analysis method. The system allowed visual confirmation and analysis of stress distribution as well as the convenient and simple construction of a digital biomechanical model that provided details of anatomical structures in regions of interest. To compare zygomatic implants with or without connected implants supporting the superstructure. Stresses in severely resorbed maxillae with connected implants were not concentrated around the alveolar bone supporting zygomatic implants. Stresses without connected implants tended to be generated in the zygomatic bone, at the middle part of zygomatic implant and at the joint of the fixture-abutment.Stress due to occlusal forces is mainly supported by the zygomatic bone, is transferred predominantly through the infrazygomatic crest and is divided into the frontal and temporal process of the zygomatic bone in various directions.

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Observation of the Internal Structure of the Zygomatic Bone by Micro-Computed Tomography

Cited by 12 publications

References 16 publications

MicroCT-based evaluation of the trabecular bone quality of different implant anchorage sites for masticatory rehabilitation of the maxilla

MicroCT-based evaluation of the trabecular bone quality of different implant anchorage sites for masticatory rehabilitation of the maxilla

Biomechanical three-dimensional finite-element analysis of maxillary prostheses with implants. Design of number and position of implants for maxillary prostheses after hemimaxillectomy

Three-dimensional finite elemental analysis of zygomatic implants in craniofacial structures

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