ABSTRACT
Oral and dental injuries commonly occur during oral and nasal intubation and comprise one third of lawsuits against anesthesiologists. This study sought to assess dental traumas [especially minor injuries like cracks] due to oral and nasal intubation and related risk factors. This observational prospective study was conducted on 60 patients [30 patients in the oral and 30 in the nasal intubation groups] during 2010-2011 in Taleghani Hospital in Tehran. Patients were examined using a disposable sterile clinical examination kit, a periodontal probe and a light curing unit. Maxillary central incisors had the highest incidence of new cracks [60% and 63.3% in the oral and nasal intubation groups, respectively]. Gender, BMI, ASA class, Angle's classification, and experience of the operator who inserted the tube had no significant association with higher frequency of cracks in the two groups. Incidence of visible dental injuries following nasal and oral intubation was 1.7% and 10%, respectively. Invisible dental injuries due to intubation are highly prevalent. These injuries are mostly disregarded by the anesthesiologists since they are not visible and do not cause any complication or problem during anesthesia. Enhancing the knowledge of anesthesiologists about dental anatomy, physiology and pathology and use of teeth-guard are necessary measures to prevent such injuries
ABSTRACT
The artificial teeth are produced with same standards for all the ethnics and countries in the world. The purpose of this study was to establish a normative size distribution in a group of students and staffs of Shahid Beheshti University of Medical Sciences. 320 individuals participated in this descriptive study. A vernier caliper was used to measure the widest mesiodistal portion and the longest incisogingival portion of the crown directly in the mouth. A matrix band was marked to determine the total width of six anterior teeth on a curve. The present study showed that 33% of the studied sample in male group, had maxillary central width in the range of 8.5-8.99mm and 44.8% in female group were in the range of 8.00-8.49mm. The mean width of six upper anterior teeth was 52.56 mm in males with the range of 46-58.1 and 50.4 mm in females with the range of 44.42 - 55.28. Differences between antimeres are seen in laterals' width and length and Central's length. Male-female comparisons indicated the presence of sexual dimorphism. Many odontometric characteristics of this sample proved to be distinctly different from the corresponding characteristics of other studies with different racial origins this would mean that commonly available standard moulds might not to be fully suitable for all racial and ethnic group