An increasing number of patients are visiting our hospital who have a chief complaint of neck and shoulder pain and/or headache but who do not have temporomandibular disorders (TMD). We carried out this study with a view to comparing the asymmetry of the facial skeleton or expression of such patients with those of healthy subjects. The incidence of such symptoms of patients and healthy subjects was examined by means of questionnaires. Asymmetry of the facial skeleton of patients was investigated by means of posterioanterior (PA) cephalograms. Facial asymmetry was analysed using the frontal view photographs of faces. We found that the patients had a higher incidence of various symptoms, including fatigability and irritability, in addition to neck and shoulder pain and headache, than the healthy subjects did. Both the healthy subjects and the patients had mandibular skeletal asymmetry to some degree, however, there was no significant difference between the two groups. On the other hand, the patients had a greater level of asymmetry of facial expression, chiefly of the lower face, than the healthy subjects did. 相似文献
Introduction: Computer software allows a photograph of patient’s face and a photograph of their dental casts to be combined into one image, similar to that seen in a lateral cephalogram. The aim of this study was to assess the agreement between the measurements carried out on this novel composite photographic image and those taken from a lateral cephalogram of the same patient.
Methods: The method involved the superimposition of a photograph of a patient’s dental casts onto a photograph of their profile thus creating a composite image. The position of teeth in relation to the face was then compared on these images and on lateral cephalograms. The distances between a number of facial reference points to the upper right central incisor and the upper right last molar, were measured on both images.
Results: The records of 34 participants showed that there was good or acceptable agreement between measurements carried out on composite images and on lateral cephalograms. This agreement was generally better for measurements carried out from the reference points to the incisor tooth than to the molar. However, standard deviations of the mean differences between measurements were relatively high.
Conclusions: The photographic superimposition method eliminates exposure to ionizing radiation and is relatively inexpensive. However, it is not reliable enough to deliver accurate information on the position of teeth in the face. 相似文献
ObjectiveThe purpose of the study was to evaluate the relationship of curve of Spee with dentofacial morphology using multiple linear regression analysis and to determine sexual dimorphism in North Indian population.MethodTwo hundred subjects were selected and divided into two groups of 100 males and 100 females. Lateral Cephalogram and models of all the subjects were taken. After tracing the cephalograms various dentofacial & dental parameters were measured: Dentofacial parameters were SNA angle, SNB angle, ANB angle, APDI angle, ODI angle, FMA angle, Ar-Go-Me, Go-Me, Ar-Go, G-Sn-Pog', Cm-Sn-Ls, U to E-line, and L to E line. Dental parameters were Curve of Spee, Intercanine width, Intermolar width, Arch length and Dental arch form. Data thus obtained were subjected to statistical analysis.ResultsThe results suggested that the curve of Spee is more influenced by the dental morphology as compared to the dentofacial morphology, but it is not affected by sexual dimorphism.ConclusionThere is a significant correlation between mandibular curve of Spee and certain dental and dentofacial parameters. 相似文献
A cephalometric study using Downs' analysis was undertaken with lateral cephalometric radiographs for a mixed sample of 50 child, adolescent and young adult Indonesians who presented with Angle Class I occlusions. Significant differences between this study group and the published results from comparative racial types were found for Downs' angle of convexity, Y-axis and incisor inclinations, indicating that Indonesians can be differentiated from other races with similar occlusions by using Downs' analysis. 相似文献
Aim of this study was 1) to evaluate long-term dental/skeletal stability in patients with mandibular retrognathia corrected by BSSO, and 2) to examine factors associated with relapse.
Materials and methods
Seventy-seven of initial 151 study cohort subjects who had undergone orthognathic surgery in 2007–2011 agreed to participate. Present paper presents data on dental/skeletal stability in 46 patients; 31 patients were excluded because of missing calibration indicator in one of the patients' pre-operative cephalometric radiographs, or because of pregnancy. Pre-operative (T1), post-operative (T2) and long-term follow-up (T3) radiographs and patient's files were used in the study.
Results
Based on overjet measurements, mean mandibular advancement was 5.7 mm and mean relapse 0.1 mm. Mean pre-operative overbite was 5.4 mm, reduction at surgery 3.4 mm and mean relapse 1.1 mm, a statistically significant change. Mean mandibular advancement measured from condyle tognathion (Co-Gn) was 6.5 mm. Relapse in Co-Gn was 1.6 mm on average, i.e., about 25% of the advancement. Amount of advancement, fixation method, patient's age or gender or orthodontist/surgeon experience did not have influence on relapse.
Conclusions
Mandibular advancement with BSSO in healthy Class II patients is considered a stable procedure. 25% skeletal relapse was found with clinically non-significant dental changes. 相似文献
The facial patterns of 29 children under the age of 15 years with tonsil and/or adenoid and sleep disorder problems was analysed. The lateral-cephalograms of these patients was digitized in a zero-based computer program using Ricketts analysis to examine facial patterns. Results of the analysis were compared with the mean of the control group, n = 41 (9-year-old Japanese children). There were significant differences (P < 0.01-0.001) between the patient group and the control group when comparing the facial axis, lower facial height, mandibular arc, total facial height, and McNamara-Pogonion. The facial pattern of children with sleep breathing disorders was discovered to be the dolico facial pattern. 相似文献