Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userThe effect of reuse and moist sterilization on primary fixity of orthodontic mini-implants: In vitro study
دراسة مخبرية على تأثير إعادة الزرع و التعقيم بالحرارة الرطبة على الثبات الأولي للزريعات التقويمية
796
0 35
0
(
0
)
Authors
فادي خليل( باحث )
Created by
Shamra Editor
Ask ChatGPT about the research
يزداد دور الزريعات التقويمية كوسيلة دعم في معالجاتنا التقويمية , هناك حالات عديدة يضطر الطبيب فيها لاعادة استعمال الزريعة التقويمية ( زرعها مرة ثانية ) بعد تعقيمها بالحرارة الرطبة, كان الهدف من البحث : تقصي أثر إعادة الزرع مرة ثانية و التعقيم بالحرارة الرطبة على الثبات الأولي للزريعة , تم استعمال طولين للزريعات (6-7 ملم) (ti – 6A1 – 4A1) و شكلين ( عادي و ثنائي الحلزنة) و ادخالها في العظم الصناعي ( saw bone ) مرة أولى ثم مرة ثانية بعد تعقيمها بالحرارة الرطبة (Autoclave) بزاوية ادخال 90 درجة و تم قياس تورك الإدخال و تورك الإخراج و قياس البريوتيست ( اختبار النسج حول السنية ) لتقييم الثبات الأولي ( بعد الزرع أول مرة و ثاني مرة بعد التعقيم ) تبين النتائج : نقص في الثبات الأولي بعد إعادة الزرع و التعقيم بالحرارة الرطبة و لكن يبقى ضمن حد يسمح باستعمالها مرة ثانية بفعالية لتأمين الدعم التقويمي اللازم و ذلك لكلا الطولين و القطرين.
There is an increasing role for orthodontic mini implants as an anchorage device in orthodontic practice In many occasions, orthodontists may have to reuse orthodontic mini-implants (re-implanting again ) after sterilizing them by moist heat. The aim of this research was investigating the effect of re-implantation and moist heat sterilization on the primary fixity of orthodontic mini-implants> Two lengths of mini-implants (6-7mm) (ti – 6A1 – 4A1 ) and two shapes (normal and dual thread ) were used and inserted in artificial bone (saw bone ) a first time and after sterilizing them by moist heat (Autoclave) a second time , in an insertion angle of 90 . The insertion and removal torque and periotest score (periodontium test device ) were measured to assess the primary fixity ( after implanting in the first time and the second time ) The results showed a decrease in the primary fixity after re-implanting and sterilizing by moist heat , but it still enough for using it a second time effectively to provide needed orthodontic anchorage for both two lengths and two shapes.
References used
ASIKAINEN P, KLEMETTI E, VUILLEMIN T, SUTTER F, RAINIO V, KOTILAINEN R. Titanium implants and lateral forces. An experimental study with sheep. Clin Oral Implants Res 1997;8:465-8
BAE, SM. PARK, HS. KYUNG, HM. KWON, OW. SUNG, JH. Clinical application of micro-implant anchorage .J ClinOrthod 2002;36:298-302
BUSCHANG P, CARRILLO R, OZENBAUG B, ROSSOUW P. 2008 survey of AAO members on miniscrew usage. J ClinOrthod 2008;42:513-8
rate research
Read More
The aim of the study was to determine the effect of Dual-Thread and diameter on the orthodontic miniscrew primary stability, and define the best shape and diameter of miniescrew can be used to give the best stability.
The study sample consisted of
(24) orthodontic miniscrews made of (Ti-6Al-4V) alloy with 2 shapes (regular and Dual-Thread) , and 2 diameters (1.6 , 1.8mm). The experiment has been divided into 3 tests : measuring the maximum insertion torque , the Periotest value , the maximum removal torque.
The results showed that the maximum insertion and removal torque were statistically higher while the Periotest values were statistically lower when using the Dual-Thread and the diameter of 1.8 mm than the regular shape and the diameter of 1.6 mm(P>0.01)
This study aims to assess the effectiveness of using calcium phosphate bone
cement in increasing the primary stability of orthodontic miniscrews by testing
its resistance to pullout forces.
The Objective is to determined whether enamel conditioning with sodium
hypochlorite (5,25%) and EDTA prior to etching was increased shear
bond strength of orthodontic brackets bonded with resin – modified glass
ionomer. our sample consisted of 42 extracted human premolars were
randomly divided into 3 groups.
This study aims to shorten the orthodontic treatment period
into,at least, half the length of time. It takes in order to reduce the
complaints of patients of the length of orthodontic treatment through
the induction of the secretion of prostagland
in E2 topically by
raising the inflammatory process via injection of vitally accepted
materials which are used routinely in daily dental practice,
Lidocaine 2% which leads to the increase of proportion of
osteoclasts and the occurrence of bone absorption in the injected
area ( the area of the tooth to be moved) .
Objective: to evaluate the effect of orthodontic treatment with fixed
appliances on periodontal tissues and to follow up the status of gingiva during 12 months of the fixed orthodontic treatment.
sample consisted of 30 patients undergoing orthodont
ic treatment with fixed appliances.
This study showed a clear increase in the values of the indices through time.
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
