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Digitalized measurement of maximum bite force in Iraqi adult sample aged 18 – 25 years with different malocclusion groups

Authors: Dhiaa K. Al- Saadi ضياء الساعدي --- Ausama A. Al – Mulla اسامة احمد الملا
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2011 Volume: 23 Issue: special issue Pages: 146-150
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Information concerning the maximum bite force in human population is important to clinicalorthodontics. Additionally, the influence of bite force on the vertical stability of any treatment result is important. Thenew position of the dentition should be compatible with the dynamics of the muscular and occlusal forces in allplanes. This study was conducted to assess the maximum bite force in the molar (left and right) and incisor region ofIraqi adult persons aged 18-25 years.Materials and method: The total sample size is (150) persons (75 male, 75 female) of untreated Iraqi subjects dividedaccording to the class of malocclusion. The maximum bite force measurements were performed by a digital device(GM10) placed in the first molar area unilaterally on both the left and right sides which was used especially for thisstudy. After that measured the maximum bite in the right central incisor region.Results: The maximum molar force was higher in class III followed by class II and then class I. The maximum incisalforce was higher in class I followed by class II then class III.Conclusions: there was a very high significant difference between molar and incisal bite force. There was nonsignificant difference between right and left side in all classes of malocclusion. Generally there was a very highsignificant difference regarding the genders, males have a greater bite force than females for class I, II, IIImalocclusion.


Article
Facial dimensions and asymmetry in clinically symmetrical faces with skeletal Class I & Class III malocclusion in an adult sample aged between 18-28 years (digital panoramic study)

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Abstract

Background: Several studies attempted to find the relationship between facial asymmetry and malocclusion andmany authors found some extent of asymmetry in individuals with normal occlusion. The purposes of this study wereto assess the amount and direction of facial asymmetry and the differences in facial angles and dimensions inclinically symmetrical faces with class I normal occlusion and class III malocclusion for both genders.Materials and Methods: The sample consisted of 58 individuals with clinically symmetrical faces aged 18-28 years,divided into two groups; class I group consisted of 30 individuals (14 males and 16 females) and class III groupconsisted of 28 individuals (14 males and 14 females). Clinical examination and digital lateral cephalometric andpanoramic radiographs were performed for each individual. Four angular (Go, Y-C-Go, Y-C-PTM and Y-C-O) andthree areal measurements (Maxillary, Mandibular and dental) were measured for each individual’s panoramicradiograph using AutoCAD program 2008.Results and Conclusions: The results showed that clinically symmetrical faces demonstrate significant asymmetry withthe left side being significantly larger than the right side and the amount of asymmetry was more at the level of themandible and the least amount of asymmetry was found at the dental area. The amount of asymmetry wasindependent of neither gender nor skeletal jaws relationship. Facial structures in term of size and shape are larger inmales than in females in both class I and class III groups.

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