Basic Informations

C.V

Personal Information:

Name: Rehab Abd EL Razek Abd El Aziz.

Phone number: 01005230669.

Address: El Sheikh Zayed, El Raboa Heights compound

Email: rehabrehab_2000@yahoo.com

rehababdelrazek@dent.bsu.edu.eg

Marital Status: married

Career Objectives:

Keen to achieve further professional development.
Continue to build research and teaching capabilities.
Using basic scientific knowledge with clinical experience to develop more efficient treatment modalities.

Field experiences:

Working as an assistant lecturer at Faculty of Dentistry, Beni-Suef University from 10/12/2014 till now.
Working as an assistant lecturer at Faculty of Dentistry, October 6 University from 4 /3 /2008 till 9/12/2014.
As an orthodontist in El- Demerdash Hospital from 18 / 11 / 2005 till 3 / 3 / 2008.
As a resident in orthodontic department, El- Demerdash Hospital from 18 / 11 / 2002 to 17 / 11 / 2005.
Working at ministry of public health hospital from 15 / 1 / 2002 to 17 / 11 /2002.
As an intern in Faculty of Dentistry(Ain Shams University), El- Demerdash Hospital, El- Zahraa Hospital (Al- Azhar University) from 1/ 11/ 2000 to 31/ 10 / 2001.

Qualification obtained:

Doctor degree in Orthodontics, April 2019. Faculty of Dentistry, Suez Canal University.

Master degree in Orthodontics, Nov 2007. Faculty of Dentistry, Tanta University.

Bachelor in dental medicine and surgery in May 2000 with final grade very good with honor degree. Faculty of Dentistry, Ain Shams University.

Research study:

Rate of Orthodontic Tooth Movement Facilitated by Alveolar Corticotomy Using Two Different Piezosurgery Techniques. (Cone Beam Study)

Comparative study of shear bond strength between conventional etching and self-etching primer.

Publication:

Comparative Study Of The Rate Of Tooth Movement Between Corticotomy And Piezocision To Facilitate En-Masse Retraction In Bimaxiliary Protrusion.

Rehab A Khalil, Waleed M Abbas, Waleed EL-Sayed Refaat, Ahmed A Ramadan. Egyptian Orthodontic Journal. Dec 2018, Volume 54, Pages: 11 – 17.

Evaluation Of Bone Thickness Changes Associated With En-Masse Retraction Facilitated By Corticotomy And Piezocision Using Cone Beam Computed Tomography.

Rehab A Khalil, Waleed M Abbas, Waleed EL-Sayed Refaat, Ahmed A Ramadan. Egyptian Orthodontic Journal. Dec 2018, Volume 54, Pages: 69 – 78.

Activities:

Participating at the research day of the Egyptian orthodontic society at El Mansoura University 2007.

Attending the research day of the Egyptian orthodontic society at Tanta University 2006.

Attending different conferences and lectures in the orthodontic field.

C.V PDF

Master Title

Comparative study of shear bond strength between conventional etching and self-etching primer.

Master Abstract

Conventional adhesive systems involved etching, rinsing and priming the enamel surface prior to bonding orthodontic brackets to enamel. In order to facilitate the bonding procedure, reduce the clinical steps and save chairside time, self-etching primers were introduced in orthodontics to simplify the bonding steps and reduce the amount of enamel loss after etching. In an attempt to improve the reliability of bonding and save chairside procedures, APC (adhesive precoated) brackets were developed to simplify the bonding procedures as the manufacturer has eliminated the need to apply adhesive to the bracket base. The aim of this study was to evaluate shear bond strength durability of APCII adhesive system (adhesive precoated brackets) after using two different etching techniques; conventional phosphoric acid etching and etching with Transbond Plus Self-Etching Primer, to examine the site of bond failure with respect to the amount of the adhesive remained on the teeth after debonding and its relationship to the technique of etching and to determine which of the etching techniques gave the optimal bond strength. The study was carried on ninety extracted maxillary premolars collected from orthodontic extraction cases. The teeth were prepared for bonding procedures through polishing the enamel surface and the teeth were divided into two groups (each group containing forty-five teeth) according to the bonding protocols. The first group was bonded using the conventional etching technique. Phosphoric acid was used for etching, Transbond XT primer was applied and APCII brackets were bonded to the teeth. In the second group, Transbond Plus Self-Etching Primer was used for etching and priming the enamel surface in one step and then APCII brackets were bonded as in the first group. Each group was subdivided into three subgroups (each of them containing fifteen teeth) according to the storage time (24 hours, 30 days and 3 months). The shear bond strengths were tested, after each storage time, in a universal testing machine at a crosshead speed of 2 mm / minute and values were calculated in megapascals (MPa). After debonding, the site of bond failure was evaluated to determine the amount of adhesive remained on the teeth and each tooth was given a score according to that developed by Artun and Bergland (1984)(5). The results were statistically analysed and revealed the following: 1- The two etching techniques, phosphoric acid etching and etching with Transbond Plus Self-Etching Primer, gave optimal shear bond strength. 2- For phosphoric acid group, shear bond strength showed no significant difference between 24 hours and 30 days or between 30 days and 3 months while showed significant increase from 24 hours to 3 months. 3- For self-etching primer group, shear bond strength showed no significant difference in relation to time among the stages of testing. 4- There was no significant difference in shear bond strength between the two etching techniques at 24 hours and 30 days, while there was a highly significant difference (p = 0.01) at 3 months, phosphoric acid was significantly higher than self-etching primer. 5- For phosphoric acid group, there was significant difference (p= 0.05) in ARI scores between 24 hours and 30 days, while there was no significant difference between 24 hours and 3 months or between 30 days and 3 months. 6- For self-etching primer group, there was no significant difference in ARI scores between 24 hours and 3 months, while there was a highly significant difference (P = 0.01) between 24 hours and 30 days and a very high significant difference (P = 0.001) between 30 days and 3 months. 7- At 24 hours and 3 months, there was a significant difference (p = 0.05) in ARI scores between phosphoric acid etching and self-etching primer, while at 30 days there was a highly significant difference (P = 0.01) in ARI scores between the two etching techniques. 8- For the three storage times, Transbond Plus Self-Etching Primer showed less adhesive remaining on the teeth than that of phosphoric acid etching. 9- At each time, self-etching primer showed a consistent pattern of bond failure (either cohesive at 24 hours and 3 months or at the enamel / adhesive interface at 30 days), while phosphoric acid etching showed variation in the mode of bond failure at the same time (mostly mixed mode of bond failure at 30 days and 3 months and at 24 hours showed cohesive failure and failure at the bracket / adhesive interface). 10- Spearman rank correlation coefficient showed no correlation between shear bond strength and ARI scores when phosphoric acid was used for etching, while showed a significant positive correlation when self-etching primer was used. Conclusions: 1- Transbond Plus Self-Etching Primer can be successfully used for bonding orthodontic brackets as it provided shear bond strength comparable to that of phosphoric acid. 2- The shear bond strength of phosphoric acid increased significantly with time, while the shear bond strength of Transbond Plus Self-Etching Primer showed no significant change as time passed. 3- Transbond Plus Self-Etching Primer showed less adhesive remaining on the teeth than that of phosphoric acid etching.

Master Abstract PDF

PHD Title

• Rate of Orthodontic Tooth Movement Facilitated by Alveolar Corticotomy Using Two Different Piezosurgery Techniques. (Cone Beam Study)

PHD Abstract

Reducing treatment time is a primary concern for all patients receiving orthodontic treatment. Corticotomy is a surgical technique that involves cutting through the cortical to accelerate tooth movement. Piezocision is a minimally invasive surgical technique to decrease surgical trauma and patient discomfort. Objective: The aim of this study was to compare between corticotomy and piezocision in facilitating en-masse retraction as regards the time needed for extraction space closure, rate of orthodontic tooth movement and periodontal evaluation and to evaluate the changes in bone thickness, incisor angulation and incisal distances accompanying en-masse retraction by using CBCT. Subjects and Methods: The sample of this study consisted of twenty subjects having Class I malocclusion with bimaxillary protrusion and requiring extraction of four first premolars and en-masse retraction of the anterior segments on both arches. The sample was randomly divided into two equal groups; group I: corticotomy group and group II: piezocision group (flapless corticotomy). Study models were obtained just before surgery and in every month for 6 months after surgery to measure the rate of orthodontic tooth movement in both groups. After completing en-masse retraction, the retraction time in months was recorded for the right and left sides and averaged. Periodontal health was evaluated before surgery, two-month after surgery and at space closure. CBCT images were obtained before treatment (T1) and after space closure (T2) to evaluate the labial, lingual and total alveolar bone thickness changes and to determine the changes in incisor angulation and distances after en-masse retraction. Results: Group I showed a statistically significant shorter retraction time than group II. Group I showed a statistically significant increase in the rate of tooth movement from the 2nd to the 5th month in the upper arch. For the lower arch, group I exhibited a significant increase in the rate of tooth movement in the 4th month. There was no significant difference between the two groups in any of the periodontal parameters at all-time intervals and both groups showed no significant difference between tested follow-up periods. Regarding bone thickness changes, group I demonstrated a significant increase in the cervical labial bone thickness of the upper incisors while both groups revealed a significant decrease in bone thickness at the cervical labial third of the lower anteriors. The lingual bone thickness showed a significant decrease for all anteriors in the cervical and middle thirds in both groups. The incisor angulation and distances revealed significant retraction in both groups. Conclusion: Corticotomy involving flap reflection showed a shorter retraction time and higher rates of tooth movement than piezocision during en-masse retraction.

PHD Abstract PDF