List of Publications by Department for the Academic Year Investigation of the Efficiency of Miniscrew as Anchorage Source in terms of Stability, Rate of Tooth Movement, and Anchorage Loss
Abstract
The study aimed to investigate the stability of temporary anchorage devises, rate of bodily canine retraction, and anchorage loss using microimplants for skeletal anchorage. The sample comprised 12 subjects: (9 females, and 3 males) with ages ranging between 17 and 28 years. All participants were nongrowing in the maxilla, maximum anchorage cases with therapeutic upper first premolar extraction. Temporary anchorage devices were inserted between second premolar and first molar. Niticoil springs were used to retract canines along a 0.016/0.022 stainless steel wire after leveling and alignment stage is completely finished. Stability of miniscrews was tested by checking their mobility with cotton forceps at each visit. Retraction distance was measured on casts every 3 weeks until retraction is over. Root parallelism was compared on panoramic X-rays taken before and after canine retraction. Anchorage loss was measured as the sagittal distance between pterygoid vertical and distal surface of the upper first molar after superimposition of cephalometric X-rays before and after canine retraction. In the light of the findings, the following conclusions could be drawn: 1 -TADs are stable absolute anchorage units that can be used for canine retraction. 2-Close relationship exists between implant loss and soft tissue health where minimplant should be inserted in keratinized tissue. 3-Rate of canine retraction can be raised using absolute anchorage. 4-Success rate of minimplants was not statistically different whether inserted on right or left areas. 5-Anchorage loss using minimplants was statistically the same whether inserted on right or left areas. 6- Anchorage loss using minimplants was statistically minimum compared to other methods. 7-Retraction distance was not statistically different on right or left sites. 8- Retraction distance was not different whether during tipping movement or bodily movement; however, extra time would be needed to upright canines that were tipped during retraction.
Author(s)
Mashhour Saad Moumneh
Coauthor(s)
Prof. Fayez Saleh, Prof. Nahed Attia