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Orthognathic surgical outcomes rely heavily on the quality of surgical planning. Automatic estimation of a reference facial bone shape significantly reduces experience-dependent variability and improves planning accuracy and efficiency. We propose an end-to-end deep learning framework to estimate patient-specific reference bony shape models for patients with orthognathic deformities. Specifically, we apply a point-cloud network to learn a vertex-wise deformation field from a patient's deformed bony shape, represented as a point cloud. The estimated deformation field is then used to correct the deformed bony shape to output a patient-specific reference bony surface model. To train our network effectively, we introduce a simulation strategy to synthesize deformed bones from any given normal bone, producing a relatively large and diverse dataset of shapes for training. Our method was evaluated using both synthetic and real patient data. Experimental results show that our framework estimates realistic reference bony shape models for patients with varying deformities. The performance of our method is consistently better than an existing method and several deep point-cloud networks. Our end-to-end estimation framework based on geometric deep learning shows great potential for improving clinical workflows.
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http://dx.doi.org/10.1109/JBHI.2021.3054494 | DOI Listing |
Surg Radiol Anat
December 2024
Department of Anatomy, Faculty of Medicine, Sivas Cumhuriyet University, Sivas, 58140, Turkey.
Purpose: The paracondylar process (PCP) is defined as the bony prominence extending from the outer side of the condyles on the outer surface of the occipital bone downwards towards the transverse process of the atlas (TPA). In this case report, the morphometry of the rarely seen PCP and its morphometric data with neighboring structures are evaluated.
Case Report And Results: Unilateral (right-sided) PCP was observed in the cranium of a Caucasian female.
J Foot Ankle Surg
December 2024
Orthopedic Foot and Ankle Center, 350 W. Wilson Bridge Rd, Ste. 200, Worthington, OH 43085. Electronic address:
Many fixation options exist for correction of a hallux valgus (HV) deformity with a first tarsometatarsal (TMT) joint arthrodesis with pros and cons to each. Few have looked at utilizing a SMA (shape memory alloy) staple made from nitinol for fixation. This study evaluates the effectiveness of a modified Lapidus technique using a nitinol (shape memory alloy) staple combined with a two-screw construct for first tarsometatarsal (TMT) joint arthrodesis in correcting hallux valgus (HV) deformity.
View Article and Find Full Text PDFJ Hum Evol
December 2024
Division of Anthropology, American Museum of Natural History, New York, NY, USA; Institut Català de Paleontologia Miquel Crusafont, Universitat Autònoma de Barcelona, Barcelona, Spain; New York Consortium in Evolutionary Primatology, New York, NY, USA.
The bony labyrinth of the inner ear houses the sensory end-organs responsible for balance (otolithic system in the utricle and saccule, and semicircular canal system) and hearing (cochlea). Study of the bony labyrinth has revealed considerable morphological diversity in the hominin lineage (semicircular canals and cochleae) and aided in reconstructing essential aspects of primate evolution, including positional behavior, audition, and phylogenic affinities. However, evidence of evolutionary change in the hominin otolithic system remains elusive.
View Article and Find Full Text PDFHeliyon
October 2024
Department of Oral and Maxillofacial Pathology, Faculty of Dentistry, Mahidol University, Bangkok, Thailand.
Objective: and rationale: Odontogenic myxoma is an uncommon odontogenic tumor with locally aggressive behavior. The clinicopathological studies of odontogenic myxoma in Asian countries are very limited and only few studies have investigated the immunohistochemical profiles of the tumor. This study aims to investigate the clinicopathological and immunohistochemical features of odontogenic myxoma at the Faculty of Dentistry, Mahidol University over a 15-year period.
View Article and Find Full Text PDFJ Anat
December 2024
Research and Development Center for Precision Medicine, University of Tsukuba, Ibaraki, Japan.
Orofacial morphology in mammals plays a critical role in essential life functions such as feeding and communication, which are influenced by the shapes of these anatomical structures. Bats are known to exhibit highly diversified orofacial morphotypes within their clade, reflecting their varied diets and echolocation behaviors. The presence of bony discontinuities between the premaxilla and maxilla or among the premaxillae is a notable feature of bat orofacial morphology, observed in certain lineages.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!