Population density

INTRODUCTION:. Orthodontic treatment are potentially unstable although a number of factors can be cited as influencing long term-result. It called relapse orthodontics. Relapse Orthodontic is the return, following correction, any change from the final tooth position at the end of treatment relapse, could be a return to the original teeth position, caused by periodontal,occlusal,soft tissue factor and growth. Orthodontic relapse is a complex problem. 1,2 Studies have shown that stability and…

Osteoporosis One disease of the bones that affects over 1 million Australians is osteoporosis. This bone-thinning disease greatly increases the risk of fractures and occurs when the “…ratio of bone formation to bone break- down…” becomes out of balance, triggering osteoblast activity to slow down (Whitney, Rady Rolfes, Crow, Cameron-smith & Walsh, 2014, p. 199). Affected bones rapidly lose important minerals, such as calcium, rendering them ineffective in replacing these important minerals…

The factors that affect the health of a population are births, death, immigration, and emigration 2. IDENTIFY TWO examples of density dependent factors. DESCRIBE how density dependent factors affect the size of a population. ANSWER: Density dependent factors could be food, water, and shelter. Density-dependent factors affect the size of the population because if there was not enough food, water, or shelter for the increasing population, the population will begin to level off until they hit…

in-depth discussion about the state of the human population, mostly the effect of the Earth's carrying capacity has upon the global population. The carrying capacity of an environment is the maximum population size that can be supported by the resources available in the environment. Once an environment has reached this maximum capacity in regards to the resources, the population growth oscillates around the environment's carrying capacity. Density-dependent regulations mostly occur when there…

Introduction Demography is the scientific study of human populations, including their sizes, compositions, distributions, densities, growth and other characteristics as well as the causes and consequences of changes in those factors. Demographic analysis is an important tool that explains sociological phenomena such as expanding population which can result in competition of resources such as food, land, access to trade routes among others. Demography largely relies on large data sets over long…

Titanium bones are the implants that doctors use when a bone is broken to badly to heal naturally. The natural way for a bone to heal is in a cast and take time for the bone to heal but titanium implants help the bones that can not do that. Titanium is used in the body because it is lightweight, sturdy and it would last long because it is durable. Titanium bones have been worn away with time especially at the hip and elbow joints but scientist are working on a way for titanium bones to become a…

Women have advanced in the Armed Forces progressively since World War II. Deseret Storm was a starting point in realizing that women could be an asset, not a detriment, to demanding military positions. Still, any combat related job within each branch had a rule of no females. That all changed in December 2015 when the United States Secretary of Defense Ashton Carter stated that all roles in the military were now open to women. This allows women to try out and be a part of the elite positions…

Fibrous dysplasia is a skeletal disorder in which bone forming cell fail to mature and produce too much fibrous or connective tissue. Fibrous dysplasia is a rare bone disorder in which scar tissue develops in place of normal bone. This can weaken the affected bone and cause it to fracture.Fibrous dysplasia is linked to a gene mutation that affects the cells that produce bone. The mutation occurs after conception, in the early stages of fetal development. Which means the mutation isn't inherited…

of this injury is found in women being 4 times more often than in men [10,31] and it has been suggested that this may be related to the greater carrying angle of the female elbow and weaker bones (osteoporosis)[11]. These injuries occur in young population and the female predominance in present series coincides well with the reported literature [31]. Capitellar fracture patients usually present with pain and swelling of the elbow immediately after injury. Fractures of the capitellum are…

implant failures. The occurrence of severe skeletal loss requires the stability provided by polymethylmethacrylate (PMMA). In a biomechanical study which investigated the treatment of osteoporotic trochanteric patients, femurs which had the lowest bone density showed a significant improvement in the initial fixation stability and total displacement of the femoral head was reduced by 39% on average in the group with the modified sliding hip screw (SHS) and PMMA compared to the standard SHS group…