3.      "Laser treatments for soft tissue problems in orthodontics"  The 8^th annual and 1^st international congress if Iranian academy of periodontology :4-6 Dec 2008 kish island,Iran

4.      "Periodontal surgery for retention of orthodontic treatments" The 8^th annual and 1^st international congress if Iranian academy of periodontology :4-6 Dec 2008 kish island,Iran

5.      "Iatrogenic complications caused by invasion of orthodontic mini-implants to tooth root and PDL" The 8^th annual and 1^st international congress if Iranian academy of periodontology :4-6 Dec 2008 kish island,Iran

6.      "3-D dentoalveolar imaging techniques for diagnosis and localization of supernumerary teeth" 8^thinternational congress of Iranian association of pediatric dentistry:15-17 july 2009 Tehran, Iran

7.      "Treatment of sleep disorder breathing by mandibular advancement device" 7^th congress of Iranian orthodontists : 20-22 May 2009, Hamedan ,Iran

8.      "Evaluation of changes in pharyngeal airway space following mandibular setback surgery in comparison with bimaxillary surgery" 7^th international orthodontic congress : 6-9 Feb 2010 Sydney , Australia

9.      "The cervical vertebral maturation (CVM) method for assessment of optimal treatment timing in dentofacial orthopedics" 2^nd congress of Iranian association of oral and maxillofacial radiology : 18-19 Feb Tehran.Iran

10.  "low level laser therapy: An approach for accelerating tooth movement and reducing pain in orthodontics" 8^th congress of Iranian orthodontists 19-21 May 2010 Tehran ,Iran

11.  "evaluation of mandibular interradicular spaces and cortical bone thickness with CBCT for orthodontics mini implant installation"8^th congress of Iranian orthodontists 19-21 May 2010 Tehran ,Iran

12.  "different methods of enamel re-preparation for bracket re-bonding"8^th congress of Iranian orthodontists 19-21 May 2010 Tehran ,Iran

13.  "Evaluation of smile esthetics with different display of gingival level by orthodontists and general public" 5^th annual congress of international association for dental research,Iranian division,30-31 Dec 2010 Tehran,Iran

14.  "Does bond strength change after repeated rebondings? "87^thcongress of the European orthodontic society 19-23 june, Istanbul,Turkey

15.  "can dentists rely on simple visual observation to predict the required space in the mixed dentition? "87^thcongress of the European orthodontic society 19-23 june, Istanbul,Turkey