Cuboid Research Articles

Research advances in clinical treatment of cuboid bone fractures

骰骨作为足的重要组成部分,对于足结构、功能的完整有重要的意义和作用.骰骨骨折在临床上较少见,且容易被忽视,所以骰骨骨折的治疗方法目前尚无统一观点.近年来,越来越多的专家学者开始对骰骨骨折进行基础和临床研究,对骰骨骨折的认识也日趋成熟。

Uni-clip staples combined with titanium alloy Bold screws for treatment of tarsometatarsal joint in-juries

Objective To investigate the clinical effects of uni-clip staples combined with titanium alloy Bold screws for the treatment of tarsometatarsal joint injuries. Methods From June 2006 to De-cember 2007, 14 cases of tarsometatarsal joint injuries were treated with a combination of uni-clip staples and Bold screws, including 4 simple dislocations and 10 fracture-dislocations. According to Myerson's classifica-tion, 2 cases were of type A, 8 type B (1 type B1 and 7 type B2), and 4 type C. Injuries involved only medial column in 2 cases, middle column in 3, medial and middle columns in 2, middle and lateral columns in 5, and 3 columns in 2. In addition, 2 were combined with cuboid fractures. Results All the wounds healed primarily. At 4 weeks all the patients began functional exercise after removal of the plaster casts. At 12-16 weeks all the patients began to walk with partial weight loading after removal of the implants, and at 22 weeks they started to walk with full weight loading. The follow-ups lasted for an average of 8.7 (4 to 14) months. The American Orthopaedic Foot & Ankle Society (AOFAS) score averaged 83.7 (75 to 91). Conclusions As the Uni-clip staple can fix tarsometatarsal dislocations without damaging the articular surface, it can reduce the occurrence of osteoarthritis. More reliable than Kirschner wire, it is capable of elastic fixation of the lateral columns. It can also treat cuboid fractures with satisfactory results. In addition, Bold screws may allow automatic reduction and stable fixation of fractures in small wounds by compressive forces. It also protects the dorsal cortex of the metatarsal bone. A combined use of the two can lead to satisfactory results in the treatment of tarsometatarsal joint injuries. Key words: Foot ioints; Foot iniuries; Internal fixator

Dislocation of the cuboid

Dislocation of the cuboid

Estimation of object color, light source color, and direction by using a cuboid

This paper presents a new method for sequentially estimating object color, light source color, and direction by using a cuboid. The method is based on the dichromatic reflection model. First, it is pointed out that three surfaces of a cuboid illuminated by parallel rays give pure diffuse reflection (DR) to a camera directed to the surfaces. The second point is that normal DR radiance (NDR) corresponding to normally incident rays can be derived from radiance of the surfaces. The NDR gives object color and light source direction. Light source color is estimated as the difference between object color and observed color. © 2005 Wiley Periodicals, Inc. Syst Comp Jpn, 36(12): 1–10, 2005; Published online in Wiley InterScience (). DOI 10.1002sscj.20399

The crystal structure of anthropogenic Pb2(OH)3(NO3), and a review of Pb-(O,OH) clusters and lead nitrates

The previously unknown crystal structure of the basic lead nitrate Pb 2 (OH) 3 (NO 3 ) has been determined using single-crystal X-ray diffraction data (Mo- K α radiation, CCD area detector). The compound is orthorhombic, space group Immm , with a = 8.314(2), b = 8.545(2), c = 17.210(3) A( R 1 = 2.78% for 940 ‘observed’ reflections with F o > 4σ( F o )). The layered structure contains a previously unknown cuboid [Pb 8 (OH) 12 ] 4+ cluster and NO 3 groups. The study used crystals formed by anthropogenic processes on a medieval mine dump, probably involving black gunpowder used in the blasting of ore. Pb 2 (OH) 3 (NO 3 ) is associated with a second nitrate, Pb 13 O 8 (OH) 6 (NO 3 ) 4 , which was previously designated as “Pb 6 O 3 (OH) 4 (NO 3 ) 2 ” or “Pb 3 (OH) 5 (NO 3 )”. It is rhombohedral, space group R 3, with a = 10.263(1), c = 25.454(5) A, and a structure solution is in complete agreement with an independent single-crystal study by Li et al. (2001). Probable hydrogen bonds in Pb 2 (OH) 3 (NO 3 ) are indicated. Reported data on [Pb x 2+ (O, OH) y ] n + clusters and lead hydroxide and oxide nitrates are summarized and discussed critically. The probable conditions of formation of the studied samples are evaluated.

An Isolated Fracture-Dislocation of the Cuboid: A Case of Report

An Isolated Fracture-Dislocation of the Cuboid: A Case of Report

The Classical Rational Cuboid Table of Maurice Kraitchik.

The Classical Rational Cuboid Table of Maurice Kraitchik.

The finite flexure of an aeolotropic elastic cuboid

The finite flexure of an aeolotropic elastic cuboid