Hardness of Artificial Bone and Vulnerability of Reconstructed Skull-A Biomechanical Study.

Background: Various materials are used to reconstruct cranial defects. The present study focuses on what happens when reconstructed skulls are impacted in trauma situations. Using biomechanical analysis, the present study elucidates how the hardness of reconstruction material affects the vulnerability of reconstructed skulls.

How Partial Skull Defect Affects Vulnerability of the Skull in Traumatic Situations: A Biomechanical Study.

Background: Part of the skull can be lost due to neurosurgical diseases or trauma. Skulls with partial defects can develop different fracture patterns from those of intact skulls. This study aims to clarify the differences.

Efficacy of seasonal allergic rhinitis using an 810 nm diode laser system.

Background And Aims: Allergic rhinitis annually reach epidemic proportions in Japan. Approximately 30 to 40% of the population suffers from allergic rhinitis during the spring season. Symptoms comprise rhinorrhea, nasal congestion, and sneezing accompanied by irritation and itching of the eyes.

A biomechanical study of relationship between sternum defect patterns and thoracic respiration.

Background: Various types of sternum defects are produced after the removal of thoracic tumors involving the sternum. The present study aims to elucidate the relationship between the defect patterns and their effects on thoracic respiration.

Methods: Ten sets of finite element models were produced simulating thoraces of 10 persons and termed normal models.

Relationship between locations of rib defects and loss of respiratory function - a biomechanical study.

Objective: The present study elucidates the relationship between the locations of rib defects and loss of respiratory function.

Methods: Ten sets of three-dimensional finite element models were produced from computed tomography data of 10 persons and categorized as normal type models. These models were modified by removing part of the ribs, and the resultant models were categorized as defect type models.

A biomechanical study regarding the effect of tissue harvesting from the thorax on its movement during inspiration.

Objective: In the practice of plastic surgery, ribs and cartilage are often harvested for use in auto-grafts. This study aimed to elucidate the effect of such harvesting on the inspiration movement of the thorax.

Materials And Methods: Sixteen three-dimensional computer simulation models were produced by reference to the CT data of 16 patients.

A case of congenital unilateral amastia.

Numerous reports have been published regarding the reconstruction of the breast, but the majority of these reports focus on breast reconstruction for defects caused by the removal of breast cancers. The authors treated a rare case of unilateral amastia where a 54-year-old female had a complete absence of the breast on one side, though the breast on the other side was intact. The defect was reconstructed successfully with a transverse rectus abdominis myocutaneous flap (TRAM) flap.

Extension of the jejunum in the reconstruction of cervical oesophagus with free jejunum transfer using the thoracoacrominal vessels as recipients.

Backgrounds: The degree to which the jejunum can reach upward is a significant consideration in cervical oesophagus reconstruction with vascularised free jejunum transfer using the thoracoacrominal vessels as recipient vessels. The present study aims to elucidate this issue.

Materials And Methods: In 30 fresh cadavers, the thoracoacrominal vessels were dissected, and the jejunums were harvested, carrying the second branches of the superior mesenteric arteries and veins as their pedicles.

An anatomical study on the position of the summit of the zygoma: theoretical bases for reduction malarplasty.

Background: To achieve optimal outcomes in reduction malarplasty, the area of zygoma from which volume should be reduced must be accurately identified. This anatomical study aims to evaluate the location of the zygoma region that contributes most to the protrusion of the cheek.

Methods: The morphology of the zygoma was studied on 121 Japanese adults (73 men and 48 women).