eng
Tehran: International Journal of Scientific Research in Dental and Medical Sciences
International Journal of Scientific Research in Dental and Medical Sciences
2676-5497
2676-5373
2020-03-01
2
1
1
5
10.30485/ijsrdms.2020.218099.1037
104887
Original Article
Evaluation of Dentin Thickness around Second Mesiobuccal Canal in Maxillary First Molar Using Cone Beam Computed Tomography (CBCT)
Zahra Borna
bornazahra@yahoo.com
1
Mohammad Mohammadi Khoshrou
khoshrou56mohammad@gmail.com
2
Haleh Mirzaei
mirzaei.haleh@gmail.com
3
Golchin Jabbari
jabbarign@gmail.com
4
Department of Endodontics, Dental School, Urmia University of Medical Sciences, Urmia, Iran
Department of Endodontics, Dental School, Urmia University of Medical Sciences, Urmia, Iran
Dental School, Urmia University of Medical Sciences, Urmia, Iran
Department of Endodontics, Dental School, Urmia University of Medical Sciences, Urmia, Iran
Background and aim: Maxillary first molars exhibit a variety of anatomies in the mesiobuccal root, with a concavity on the distal wall limiting the canal's preparation to prevent strip perforation. This study evaluated the dentin thickness around the second mesiobuccal canal (MB2) in the maxillary first molar using cone-beam computed tomography (CBCT).Materials and methods: The present retrospective descriptive cross-sectional study conducted on 120 CBCT images of patients referred to Radiology Centers of Urmia (Iran) between 2017 and 2019. Samples were collected using a convenience sampling method. A professional radiologist prepared all the CBCT images that had the least exposure required with proper image resolution. The first and second mesiobuccal canals (MB1 and MB2) were both detected. Two endodontists evaluated the dentin thickness around the MB2 canal in the mesial, distal, and palatal walls and its distance to MB1 at coronal, middle and apical cross-sections. Statistical significance level set at 0.05 and all analyses performed using SPSS version 23 software. Results: In all three sections, the lowest dentin thickness was in the distal wall. The highest was in the palatal wall; this difference was statistically significant in all sections (p<0.05). Minimum distances of MB2 from mesial, distal and furcation surfaces and from MB1 canal were significantly different in coronal (p = 0.008), middle (p = 0.004) and apical (p = 0.001) sections.Conclusion: The low thickness of distal wall indicates more conservative considerations in endodontic and prosthodontic treatments. The CBCT seems to be an effective and non-invasive method in examining root and canal morphology. It may be used as preoperative radiography to assess the dentin thickness in danger zones to prevent iatrogenic errors.
http://www.ijsrdms.com/article_104887_6c06fbb4d70588dd2f6b1bb4b40d4705.pdf
Cone Beam Computed Tomography (CBCT)
Dentin
Maxillary molar
Root canal
eng
Tehran: International Journal of Scientific Research in Dental and Medical Sciences
International Journal of Scientific Research in Dental and Medical Sciences
2676-5497
2676-5373
2020-03-01
2
1
6
11
10.30485/ijsrdms.2020.215947.1033
104273
Strategy for Treating the Gastric Cancer: A Systematic Review and Meta-analysis
Somaye Jamali
somaye_jamali@yahoo.com
1
Ehsan Kasraei
kasraei@gmail.com
2
Armita Rezazadeh Kalashami
armita2015@yahoo.com
3
Mahdie Barri Dizaj
barridizaj@gmail.com
4
Department of Internal Medicine, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
Department of Cardiology, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran
School of Medicine, Guilan University of Medical Sciences, Rasht, Iran
Faculty of Medicine, Babol University of Medical Sciences, Babol, Iran
Background and aim: Contemporary approaches to treat the stage IV patients could be generally divided into five groups of the palliative gastrectomy, radiotherapy, Chemotherapy, bypass, and gastric stent. The present systematic review and meta-analysis evaluated the overall survival to treat stage IV gastric cancer (GC) based on distinct signs and prognosis.Materials and methods: MEDLINE, PubMed, Cochrane Library, Embase, ISI, google scholar have been utilized as the electronic databases for searching systematic literature until 2019. Then, Endnote X9, which is one of the software programs in the market, has been applied to manage the titles electronically. Searches were performed with keywords, “Gastric cancer”, “cancer”,” Gastric”,” Stage IV”, “Radiotherapy” “Chemotherapy” , “Gastrectomy”, “treatment of gastric cancer”, “bypass”.Results: A total of 150, 93, 21 studies respective abstracts and topics have been discovered in the course of manual and electronic searches in the internet. Finally, a total of 10 studies for Palliative gastrectomy, five studies for Chemotherapy, and three studies for Radiotherapy required for this systematic review. Conclusion: According to the meta-analysis, palliative gastrectomy exhibited a statistically significant survival advantage for the patients with the untreatable developed GC.
http://www.ijsrdms.com/article_104273_61b5959a63dcb70f5ba57b8d3daebbc7.pdf
Gastric cancer
Overall survival
stage IV gastric cancer
eng
Tehran: International Journal of Scientific Research in Dental and Medical Sciences
International Journal of Scientific Research in Dental and Medical Sciences
2676-5497
2676-5373
2020-03-01
2
1
12
16
10.30485/ijsrdms.2020.217432.1035
104465
Identify the Dentistry Students Perception of the Learning Environment (LE): A Literature Review
Mir Mahdi Seyedashrafi
mmsahrafi@gmail.com
1
Javad Jamali
graywolf7814@gmail.com
2
Ali Rezaie
rezaei@yahoo.com
3
Amir Hosein Jamali
ahjamali20@yahoo.com
4
Department of Oral and Maxillofacial Surgery, Dental School, Urmia University of Medical Sciences, Urmia, Iran
School of Dentistry, Shahed University of Medical Sciences, Tehran, Iran
School of Dentistry, Shahed University of Medical Sciences, Tehran, Iran
School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran
Background and aim: Learning environment in the process of medical education and the impact of the professional behavior of learners based on their understanding of learning environments is a unique role. The aim of this systematic literature review was evaluation. Identify the Dentistry Students’ perception of the LE.Materials and methods: Some papers retrieved using the search strings were chosen via consideration of specific criteria for ensuring their relevance and whether they were able to reply to each RQ. Upon reading the full-text papers, all included studies meeting inclusion criteria that considered the titles, abstracts, and keywords were regarded as the pertinent paper.Conclusion: Recommended to plan appropriately for holding educational courses and prepare conditions, facilities, and suitable environments for the growth of these educational approaches.
http://www.ijsrdms.com/article_104465_ada8421a3bc96b9b3c7edbab844cf8fd.pdf
dentistry students
Learning Environment
Evidence-Based Dentistry
eng
Tehran: International Journal of Scientific Research in Dental and Medical Sciences
International Journal of Scientific Research in Dental and Medical Sciences
2676-5497
2676-5373
2020-03-01
2
1
17
19
10.30485/ijsrdms.2020.217841.1036
104810
A Huge Orofacial Myiasis, the Importance of Ideal Management: A Case Report
Nicolas Solano
nicksolano@msn.com
1
Ariamay Castrillo
ariamayc@gmail.com
2
Enmanuel Parra
enmanuelparra_04@hotmail.com
3
Carlos Medina
mdnacarlos@gmail.com
4
Oral and Maxillofacial Surgery Unit, University Hospital of Maracaibo, Venezuela
Oral Surgery Post-graduated Program, School of Dentistry, Universidad del Zulia, Venezuela
Oral Surgery Post-graduated Program, School of Dentistry, Universidad del Zulia, Venezuela
Oral Surgery Post-graduated Program, School of Dentistry, Universidad del Zulia, Venezuela
It is widely accepting that Myiasis refers to an infestation of alive human animals or vertebrates from larvae of the Diptera insect family that feed on live or necrotic tissues depending on the species. The Cochliomyia hominivorax species is the most common, which feeds entirely on the necrotic tissues and is commonly founding in tropical and subtropical areas, first screw-worm larvae fed on the living tissues so that the egg deposition occurs on the periphery of the new wounds. The most common locations in the head and neck where this infestation appears are the ears, eyes, nose, oral cavity, sinuses, mastoid region, tracheotomy wound, and lymph nodes. Multiple parameters predispose to the possibility of presenting Myiasis in this area, such as the increased age, lower socioeconomic status as well as medical co-morbidities, and malignant tumors. Therefore, this study presented a case of a 71-year old patient with orofacial Myiasis, who received medical treatment, mechanical removal, surgical debridement and occlusion of the wound with liquor based on the essence of anis or anisette for the asphyxia of the larvae, with a satisfactory evolution after seven days of the protocol. This case provides interesting information that could help oral and maxillofacial surgeons manage the type of orofacial Myiasis
http://www.ijsrdms.com/article_104810_11c144d5bf4f6dac90fa68568451e1f9.pdf
myiasis
Orofacial myiasis
Cochliomyia hominivorax
honey
honey-impregnated dressings
eng
Tehran: International Journal of Scientific Research in Dental and Medical Sciences
International Journal of Scientific Research in Dental and Medical Sciences
2676-5497
2676-5373
2020-03-01
2
1
20
22
10.30485/ijsrdms.2020.204662.1022
101591
Incidental Finding of a Supernumerary Tooth Fused to a Mandibular Second Molar Using Cone Beam Computed Tomography (CBCT): A Case Report
Negin Soghli
neginsoghli@gmail.com
1
Mehrdad Panjnoush
m_panjnoush@yahoo.com
2
Maryam Johari
johari.mrm@gmail.com
3
Student Research Committee, Babol University of Medical Sciences, Babol, Iran
Department of Oral and Maxillofacial Radiology, Dental Faculty, Tehran University of Medical Sciences, Tehran, Iran
Department of Oral and Maxillofacial Radiology, Dental Faculty, Babol University of Medical Sciences, Babol, Iran
The twinned tooth is a rare phenomenon among dental anomalies, which may develop during the bud stage tooth morph differentiation. Twinned tooth refers to the fusion of two adjacent tooth buds or gemination of the single bud. Clinically it is difficult to differentiate between fusion and gemination. During this anomaly, primary dentition is mostly affected rather than permanent dentition, and predominantly, it is observed unilaterally. Gemination is more common in the anterior region of maxilla, while fusion mainly occurs in the anterior mandibular region. There is no definite etiology for these anomalies reported, but genetic and environmental factors are mostly mentioned as potential risk factors. This paper describes a case of fusion of the second mandibular molar with a supernumerary tooth. Twinned teeth can cause clinical problems such as dental caries, periodontal, and aesthetic problems. Early diagnosis can be achieved through careful clinical and radiographic examinations; however, in most cases of twinned teeth, no significant clinical problem is reported.
http://www.ijsrdms.com/article_101591_e98fe096f68b8dfc49bea7cdc25eb035.pdf
Dental fusion
Twinned-teeth
Double-teeth