مقالات  دکتر لیلا پیامی‌نیا  


  Implant assisted ortho-surgery in edentulous jaws: a clinical report Clinical Case Reports 6 August 2015 Arash Khojasteh1, Leila Payaminia2 & Marzieh Alikhasi3
Successful rehabilitation of patients with severely atrophied jaws who demand implant therapy is a challenging procedure [1] due to insufficient bone for implant insertion, a reversed intermaxillary relationship [2] and an increased inter-arch space [3]. Although the sinus bone grafting is a reliable reconstructive technique which provides adequate bone volume [4, 5] in maxillary posterior area, sagital, and vertical discrepancies in such cases are more than what could be solved with sinus lifting or simple bone grafting. Therefore, for correcting extreme deficiencies, ortho-surgery along with bone grafting is recommended [6–9]. In these complex cases, the treatment plan includes several surgical interventions including orthognathic surgery, bone grafting, and implant insertion, which could be done in a variant number of steps and sequences [2, 10, 11]. One approach which has shown good results is Le Fort I osteotomy combined with interpositional grafts [12, 13]. It could be followed by delayed [14] or immediate [2] implant insertion. However, the skeletal relapse is considered the most common complication after orthosurgery [15, 16]. As any adaptive changes in the orofacial complex may lead to relapse [17], the occlusion stability is important to prevent it; but unfortunately we usually encounter edentulous patients whose dentures lack retention and occlusal stability. This article reports a modified approach for step by step rehabilitation of an edentulous case that has experienced two unsuccessful ortho-surgical jaw corrections.

دریافت فایل پیوست

نفر دوم از 3 نفر

  Effect of Repeated Screw Joint Closing and Opening Cycles and Cyclic Loading on Abutment Screw Removal Torque and Screw Thread Morphology: Scanning Electron Microscopy Evaluation. Int J Oral Maxillofac Implants 2018 January/February;33(1):31–40 Arshad M, Mahgoli H, Payaminia L. نفر سوم از سه نفر
PURPOSE: To evaluate the effect of repeated screw joint closing and opening cycles and cyclic loading on abutment screw removal torque and screw thread morphology using scanning electron microscopy (SEM). MATERIALS AND METHODS: Three groups (n = 10 in each group) of implant-abutment-abutment screw assemblies were created. There were also 10 extra abutment screws as new screws in group 3. The abutment screws were tightened to 12 Ncm with an electronic torque meter; then they were removed and removal torque values were recorded. This sequence was repeated 5 times for group 1 and 15 times for groups 2 and 3. The same screws in groups 1 and 2 and the new screws in group 3 were then tightened to 12 Ncm; this was also followed by screw tightening to 30 Ncm and retightening to 30 Ncm 15 minutes later. Removal torque measurements were performed after screws were subjected to cyclic loading (0.5 × 10⁶ cycles; 1 Hz; 75 N). Moreover, the surface topography of one screw from each group before and after cyclic loading was evaluated with SEM and compared with an unused screw. RESULTS: All groups exhibited reduced removal torque values in comparison to insertion torque in each cycle. However, there was a steady trend of torque loss in each group. A comparison of the last cycle of the groups before loading showed significantly greater torque loss value in the 15th cycle of groups 2 and 3 compared with the fifth cycle of group 1 (P < .05). Nonetheless, torque loss values after loading were not shown to be significantly different from each other. CONCLUSION: Using a new screw could not significantly increase the value of removal torque. It was concluded that restricting the amount of screw tightening is more important than replacing the screw with a new one when an abutment is definitively placed.

دریافت فایل پیوست

https://www.ncbi.nlm.nih.gov/pubmed/28938027

  TEACHERS AND HEALTHCARE WORKERS’ KNOWLEDGE AND ATTITUDE ABOUT ORAL HEALTH IN THE ELEMENTARY SCHOOLS SUPERVISED BY SHAHID BEHESHTI UNIVERSITY OF MEDICAL SCIENCES International journal of Multidisciplinary Research and information 2016; Vol. 2(3): 288-292. Masoumeh Moslemi1, Leila Payaminia2 and Ghazaleh Baniebrahimi3 دوم از سه نفر
improving the children’s oral health. However, this issue has not been sufficiently addressed in the healthcare policies. The present study was conducted to analyze oral health knowledge and attitude of elementary school teachers and healthcare workers in the schools supervised by Shahid Beheshti University of Medical Sciences in Tehran in 2011. Materials and methods. The study was carried out on 413 elementary school teachers and 62 health workers. A valid and reliable questionnaire was given to participants. The obtained data were analyzed by descriptive statistics. The correlation between knowledge and attitude scores was determined by Pearson correlation coefficient, while the effect of various demographic factors on the knowledge and attitude was evaluated by linear regression analysis. Results. 53.5% of teachers and 80.6% of health workers recognized the most common sites of deciduous dental caries in elementary school children, 89.6% of teachers and 98.4% of healthcare workers considered fluoride to be effective in prevention of caries; and 81.6% of teachers and 93.5% of health workers believed current dental services were therapeutical rather than preventive. There was a significantly direct correlation between attitude and knowledge scores (p<0.0001), while none of the demographic factor significantly influenced the attitude and knowledge, except school type (male vs female) which significantly impacted the knowledge scores (p<0.028). Conclusion. Teachers and healthcare workers in the elementary schools supervised by Shahid Beheshti University of Medical Sciences had good knowledge and attitude about the children’s oral health; however, some shortcomings were observed mainly among teachers.

دریافت فایل پیوست


< >