Assessment for periodontal situation of students of a number universities in Ha Noi

Background: The proportion of periodontal diseases in the community is increasing, particularly in youth. So we should have assessed for periodontal situation of students. Objectives: To assess for periodontal diseases and treatment needs in the youths; and to propose some method in the prevention and treatment for their periodontal diseases. Subjects and method: The study included 867 students (354 were male and 516 were female) at the Ha Noi Foreign Language University and Military Academy of Medicine, age ranges from 17 to 25 years, all of them were of normal development and had no deformities of head and face. We researched into 3 indexes: Muhlemann\u2019s gingival bleeding index, Jamison\u2019s tartar index and Community Periodontal Index of Treatment Needs (CPITN) that were written by the WHO. Results: Gingival bleeding rate were 86.51% of cases, most cases were I and II grade (49.82% and 33.33%, respectively). Tartar rate and 89.04%, I, II and III grade of tartar were 33.33%, 32.99%, 22.72%, respectively. 91.8% of cases needed treatment in periodontal position. Conclusions: The proportion of periodontal diseases was high, most of them were gingivitis. This situation should improved by primary oral health care and personal oral hygiene.

Evaluation of the postoperative spherical refractive error in trans pars plana vitreo-lensectomy in combination with intraocular lens insertion among patients with ocular injury

Background: The postoperative residual spherical equivalent (SE) refractive error of the posterior chamber intraocular lens insertion is the cause result in significant distant vision loss. Objective: The study evaluated residual SE refractive error of the patients having ocular trauma undergoing a trans pars plana vitreo-lensectomy and posterior chamber intraocular lens insertion, for recorrection of the preoperative IOL power calculated formula are also investigated. Subjects: 43 consecutive patients who underwent a trans pars plana vitreo-lensectomy and posterior chamber intraocular lens insertion in the sulcus, in the Trauma Department of National Institute of Ophthalmology, from December 2005 to June 2007. Method: This was a prospective cross-sectional study. Results: Among 43 patients, there were 39 men and 4 women, age ranged from 10 to 45 years. In the most cases, the residual spherical equivalent deviation was planned to achieve final mild myopia (mean -1.75 D by manifest refraction; -1.9 D by autorefractor measurements). The surgery could provide a best corrected visual acuity at over 0.2 (81.4%). Conclusions: Intraocular lens implantation at the time of trans pars plana vitreo-lensectomy could provide a reasonable restoration of visual acuity and binocular function. However, recorrection of the IOL power calculation was necessary in these cases.