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A 15-Year Study of Osseointegrated Implants in the Treatment of the Edentulous Jaw
Published in Niall MH McLeod, Peter A Brennan, 50 Landmark Papers every Oral & Maxillofacial Surgeon Should Know, 2020
The “anchorage function” can be described as survival of functional implants and resembles the “implant survival,” which is nowadays often calculated in comparable clinical publications. Implant survival in a noncompromised patient currently approaches 100% after 1 year. This publication described an improvement of anchorage function from 48% to 81% in the upper jaw and from 63% to 91% in the lower jaw, which is an admirable improvement.
Ligament Reconstruction with Reference to the Anterior Cruciate Ligament of the Knee
Published in Verna Wright, Eric L. Radin, Mechanics of Human Joints, 2020
The Leeds-Keio ligament is made of polyester-polyethylene terephthalate, a material which has been in use in the human body in the form of arterial grafts and heart valves for more than 20 years. The method adopted for anchorage to the bone is unique to this implant. It relies on and benefits from both bone and tissue ingrowth.
Orbital resection and reconstruction
Published in John Dudley Langdon, Mohan Francis Patel, Robert Andrew Ord, Peter Brennan, Operative Oral and Maxillofacial Surgery, 2017
Osseointegrated implants have helped overcome a number of the problems associated with facial prosthe- ses. They provide reliable anchorage for large and heavy prostheses and facilitate their rapid placement and removal. Modern magnetic capped implants are very simple to use.
Biomechanical evaluation of maxillary protraction with an orthodontic anchor screw: a three-dimensional finite element analysis
Published in Orthodontic Waves, 2021
Tomohiro Ebisawa, Hidenori Katada, Kenji Sueishi, Yasushi Nishii
In the sagittal direction, greater skeletal effects and weaker dental effects were observed in the skeletal anchorage model. Therefore, the skeletal anchorage model prevented undesirable dental effect. The lingual appliance connected to the orthodontic anchor screw inserted in the anterior direction apparently restricted anterior displacement of the teeth. In both models, anterior skeletal displacement increased at greater angles, whereas anterior dental displacement decreased. The posterior displacement of the teeth at 30° and 40° was caused by the clockwise rotation of the maxilla. While these dental displacements results are consistent with those reported by Tanne et al [25] and Yan et al. [26], our results for the skeletal displacement differed. This can be attributed to the fact that the models by Tanne et al. and Yan et al. did not generate suture portions and an appliance but ours did.
Miniscrews for orthodontic anchorage: a review of available systems
Published in Journal of Orthodontics, 2018
Aslam Alkadhimi, Ebrahim A. Al-Awadhi
Anchorage is defined as the prevention of unwanted tooth movement (Proffit 2000). Traditionally, anchorage has been provided in orthodontics by anchor sites within the mouth (intraoral anchorage) or outside the mouth (extraoral anchorage). Intraoral anchor sites include the teeth or other oral structures, such as the palatal vault. Extraoral anchorage is achieved by using headgear, neck straps or facemasks. A more recent method of reinforcing anchorage is the use of intraoral bone anchorage devices (BADs). Gainsforth and Higley (1945) first suggested the use of metallic screws as anchors as long ago as 1945. Following this, Creekmore and Eklund (1983) inserted a similar device below the nasal cavity in 1983. In the late nineties, Kanomi (1997) first described a miniscrew, specifically designed for orthodontic use. In the following year, Costa et al. (1998) described a screw with a special bracket-like head that could be used for either direct or indirect anchorage. Since then, various types of BADs have been introduced in the market.
The dental manifestations and orthodontic implications of hypoparathyroidism in childhood
Published in Journal of Orthodontics, 2018
Amy Arora Gallacher, M. N. Pemberton, D. T. Waring
Short dental roots, resulting in unfavourable root-crown ratios, can affect the prognosis of teeth and complicate treatment planning in orthodontic treatment. Further root shortening as a result of root resorption is recognised as an undesirable consequence of orthodontic treatment. Radiographic examination of routine orthodontically treated patients shows loss of root length in 48% of patients (Remington et al. 1989) with a mean loss of 1–2 mm (Linge and Linge 1983) However, radiographs only provide two-dimensional assessment of root resorption and therefore are likely to underestimates its incidence. Histological study of extracted, orthodontically treated teeth report greater than a 90% occurrence of orthodontically induced inflammatory root resorption (Weltman et al. 2010). Patients with short, blunt roots are at an increased risk of root resorption during orthodontic treatment (Levander and Malmgren 1988) and therefore the application of orthodontic forces should be applied with considerable caution and potentially avoided in patients with these anomalies. If proceeding with orthodontic treatment careful planning is required when assessing anchorage, treatment mechanics and relapse potential.