PMID: 20657874Jul 27, 2010Paper

The effect of miniscrew taper morphology on insertion and removal torque in dogs

The International Journal of Oral & Maxillofacial Implants
Jung-Yul ChaChung Ju Hwang

Abstract

This study compared the insertion and removal torque of tapered and cylindric orthodontic miniscrews. Ninety-six miniscrews were placed into the buccal alveolar bone of the mandible in six male beagle dogs. Maximum insertion torque was measured during placement of 48 miniscrews, and the maximum removal torque was recorded after 3 and 12 weeks of loading. After 4 months of healing, 48 additional miniscrews were implanted in almost the same place as the first set of implants; insertion torque was again measured. Histologic analysis was performed after 3 and 12 weeks of loading. Bone-implant contact and bone volume/total volume were compared during each period and in each group. The tapered miniscrews showed a higher mean maximum insertion torque (22.3 ± 3.2 Ncm) than the cylindric miniscrews (13.6 ± 2.0 Ncm) (P < .001). The mean maximum removal torque of the tapered miniscrews (9.1 ± 2.3 Ncm) was significantly higher than that of the cylindric miniscrews (5.7 ± 2.2 Ncm) at 3 weeks after placement (P < .05), but there was no significant difference in the mean maximum removal torque value between the tapered (4.2 ± 1.4 Ncm) and cylindric (3.0 ± 1.1 Ncm) implants after 12 weeks of loading. The percentage of bone-implant contact was ...Continue Reading

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics
Eduardo Yugo Suzuki, Boonsiva Suzuki
Journal of Orofacial Orthopedics = Fortschritte Der Kieferorthopädie : Organ/official Journal Deutsche Gesellschaft Für Kieferorthopädie
Georgios Tsaousidis, Oskar Bauss
The International Journal of Oral & Maxillofacial Implants
Yi-Jane ChenChung-Chen Jane Yao
© 2021 Meta ULC. All rights reserved