Influence of standardization on the precision (reproducibility) of dental cast analysis with virtual 3-dimensional models

2015 ◽  
Vol 147 (3) ◽  
pp. 373-380 ◽  
Author(s):  
Kazuo Hayashi ◽  
Onejune Chung ◽  
Seojung Park ◽  
Seung-Pyo Lee ◽  
Rohit C.L. Sachdeva ◽  
...  
Keyword(s):  
3 Dimensional ◽  
Dimensional Models ◽  
Cast Analysis ◽  
Dental Cast

scholarly journals Twenty-year follow-up of functional treatment with a bionator appliance: A retrospective dental cast analysis

2019 ◽  
Vol 90 (2) ◽  
pp. 209-215 ◽  
Author(s):  
Rebecca Jungbauer ◽  
Vasiliki Koretsi ◽  
Peter Proff ◽  
Ingrid Rudzki ◽  
Christian Kirschneck
Keyword(s):  
Class Ii ◽  
Mandibular Incisor ◽  
Lower Incisor ◽  
Par Index ◽  
Skeletal Class Ii ◽  
Cast Analysis ◽  
Dental Cast ◽  
Intercanine Distance

ABSTRACT Objective: To investigate changes in dental arch configuration, relationship, and malocclusion directly after Class II malocclusion treatment with a Balters bionator modified by Ascher as well as 20 years after treatment. Materials and Methods: Orthodontic dental cast analysis of 18 patients with skeletal Class II treated with a bionator without any additional fixed therapy was performed with a digital caliper at three stages: before (T0), after (T1) and 20 years after (T2) treatment. Arch perimeter and depth, intermolar and intercanine distance, overjet, overbite, sagittal molar and canine relationship, mandibular incisor irregularity (Little's index), and malocclusion (PAR index) were assessed. Results: During treatment (T0–T1), upper arch perimeter significantly increased with a significant decrease in the upper and lower arch perimeter long-term (T1–T2), whereas corresponding arch depths changed only slightly in both periods. Transverse intermolar width increased significantly during treatment, remaining almost constant from T1 to T2. Lower intercanine distance remained fairly unchanged during treatment, but decreased significantly during follow-up. Lower incisor irregularity improved slightly during treatment but increased significantly long-term. After treatment, sagittal molar relationships on both sides were improved, overjet and overbite reduced; these significant changes remained stable long-term. The peer assessment rating (PAR) index was significantly lower after treatment and increased insignificantly during follow-up. Conclusions: 20 years after bionator treatment without additional fixed appliances, the improved sagittal relationship and the reduced overjet and PAR index remained fairly stable. Long-term changes are most likely due to physiological aging processes and are not associated with bionator treatment.

scholarly journals Dentofacial Characteristics among Monozygotic and Dizygotic Twin Pairs from a Unique Village of Twins in South India: A Descriptive Cross-sectional Study

2017 ◽  
Vol 03 (01) ◽  
pp. 025-028
Author(s):  
Praveen Jodalli ◽  
Ganesh Panchmal ◽  
Vinej Somaraj ◽  
Shafees Koya
Keyword(s):  
South India ◽  
Monozygotic Twins ◽  
Twin Studies ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Cross Sectional ◽  
Factors Influencing ◽  
Dizygotic Twins ◽  
Cast Analysis ◽  
Dental Cast

Abstract Aim: To assess the dentofacial characteristics of a mystery village of twins in South India. Materials and methods: A descriptive cross-sectional study was carried out among of 22 twin pairs (10 monozygotic twins and 12 dizygotic twins). The evaluation was done in terms of height, weight, dentofacial profile, and occlusion status based on anthropometric, photographic, and dental cast analysis. Results: Data obtained upon analysis of anthropometric measurements, photographic data, and dental cast evaluation revealed a set of characteristics peculiar to the twins of this unique village. Conclusion: Twin studies are a fascinating method of research because of their ability to correctly isolate a characteristic and determine its impact, especially in terms of dentofacial characteristics. Clinical significance: Twin research design involving the comparison of variables among monozygotic (identical) and dizygotic (fraternal) twins is a method by which researchers quantify and classify the contribution of genes and other extraneous factors influencing heredity on the dentofacial complex and dentition.

scholarly journals Thirty-two-year follow-up study of Herbst therapy: A biometric dental cast analysis

2014 ◽  
Vol 145 (1) ◽  
pp. 15-27 ◽  
Author(s):  
Hans Pancherz ◽  
Krister Bjerklin ◽  
Birgitta Lindskog-Stokland ◽  
Ken Hansen
Keyword(s):  
Follow Up Study ◽  
Cast Analysis ◽  
Dental Cast

scholarly journals PENGGUNAAN ANALISIS PONT PADA POPULASI MAHASISWA SUKU MINANG DI FAKULTAS KEDOKTERAN GIGI UNIVERSITAS ANDALAS

2019 ◽  
Vol 1 (2) ◽  
pp. 126-141
Author(s):  
Murniwati Murniwati ◽  
Maya Syafitri
Keyword(s):  
Mean Value ◽  
Dental Arch ◽  
Cross Sectional ◽  
Arch Width ◽  
The Difference ◽  
Cross Sectional Design ◽  
Dental Arch Width ◽  
Different Characteristics ◽  
Cast Analysis ◽  
Dental Cast

Dental cast analysis is one of the important thing in orthodontic treatments. One of the dental cast analysis which is usually used is Pont analysis, proposed in 1909. Pont did his research to a population in French which is Caucasian and stated that his theory needs to be tested to another ethnics to verify the applicability of Pont analysis to that population. On each race, there are some specific physical characteristics such as the form and width of dentition and dental arch. Minang population are Mongolian who has the different characteristics of dentition and dental arch with the Caucasians.The aim of this study is to identify whether Pont analysis is precise to be used to Minang population. Method : Cross-sectional design was used in this study. This study was done to 65 upper dental casts from Minang student at the Faculty of Dentistry Andalas University who met the inclusion criteria. The difference between the measured and the calculated interpremolar and intermolar arch width was tested with paired T test with the significant value of 0.05 (p=0.05). Result : Mean value of interpremolar width was 37.8838 ± 2.29042 mm and intermolar width was 47.6046±3.18780 mm. The result of statistical analysis showed that there is no significant differences of the measured and the calculated interpremolar and intermolar width of Minang Student at Faculty of Dentistry Andalas University (p>0.05). Conclusion : Pont analysis can be used as one of the dental cast analysis in orthodontic diagnosis and treatment planning to Minang population. It is suggested to do a further research to identify lower dental arch form of the Minang population whose upper dental arch width equals to the predicted arch width according to Pont’s formula.

A new method to acquire 3-D images of a dental cast

2006 ◽  
Author(s):  
Zhongke Li ◽  
Yaxing Yi ◽  
Zhen Zhu ◽  
Hua Li ◽  
Yongyuan Qin
Keyword(s):  
New Method ◽  
Dental Cast

scholarly journals Dental crowding

2012 ◽  
Vol 83 (1) ◽  
pp. 10-15 ◽  
Author(s):  
David Normando ◽  
Marco A. O. Almeida ◽  
Cátia C. A. Quintão
Keyword(s):  
Tooth Loss ◽  
Direct Evidence ◽  
Tooth Wear ◽  
Dental Arch ◽  
Tooth Size ◽  
The Past ◽  
Dental Crowding ◽  
Cast Analysis ◽  
Dental Cast

Abstract Objective: To evaluate the role of genetics and tooth wear in the etiology of dental crowding through the analysis of a split indigenous Amazon population. Materials and Methods: Dental crowding prevalence (n  =  117), tooth wear (n  =  117), and inbreeding coefficient (n  =  288) were compared for both villages. A biometric investigation was performed by dental cast analysis of 55 individuals with no tooth loss. Mann-Whitney statistics, independent t-tests, and Fisher exact tests were used at P < .05. Results: A high coefficient of inbreeding was confirmed in the resultant village (F  =  0.25, P < .001). Tooth wear was not significantly different (P  =  .99), while a significantly higher prevalence of dental crowding was confirmed in the original village (PR  =  6.67, P  =  0.02). Forty dental arches (n  =  20) were examined in the new group, and only one (2.5%) had a dental crowding ≥5 mm. In the original villages, we found 20 arches (28.6%) with dental crowding. No difference was observed for tooth size, while larger dental arch dimensions explained a lower level of dental crowding in the resultant village. Conclusions: Our findings downplay the widespread influence of tooth wear, a direct evidence of what an individual ate in the past, on dental crowding and emphasize the role of heredity, exacerbated through inbreeding, in the etiology of this malocclusion.

scholarly journals Herbst treatment with mandibular cast splints—revisited

2011 ◽  
Vol 81 (5) ◽  
pp. 820-827 ◽  
Author(s):  
Tarek El-Fateh ◽  
Sabine Ruf
Keyword(s):  
Treatment Time ◽  
Control Group ◽  
Herbst Appliance ◽  
Lower Incisor ◽  
The Mean ◽  
Anchorage Loss ◽  
Incisor Inclination ◽  
Cast Analysis ◽  
Dental Cast ◽  
Lower Incisors

Abstract Objective: The objective of this study was to reassess the dento-skeletal treatment effects and the amount of anchorage loss during reduced mandibular splint (RMS) Herbst treatment. Materials and Methods: One hundred consecutive Class II patients treated with a RMS-Herbst appliance were analyzed. The mean pretreatment age of the patients was 14.5 years, and the mean treatment time with the Herbst appliance was 8.1 months. Both before (T1) and after (T2) Herbst treatment a cephalometric measurement of lower incisor inclination, a sagittal occlusion analysis, and a dental cast analysis were performed. A comparison was performed with a historic Herbst control group treated with total mandibular cast splints (TMS). Results: During treatment the lower incisors proclined markedly (12.9° ± 4.6°). The amount of incisor proclination in the RMS group was, on average, 3.6° larger (P < .001) than in the TMS group. The lower incisor proclination increased from 11.9° (prepeak) to 14.3° (young adult). The level of professional experience of the practitioners performing the treatment did not influence the amount of incisor proclination significantly. The total available space in the lower arch increased by an average of 1.8 mm, and a space opened between the lower second premolars and lower permanent first molars in 62% of the present RMS-Herbst (average of 0.4 mm per side). Conclusions: Treatment with RMS-Herbst appliances leads to higher proclination of the lower incisors than does treatment with TMS-Herbst appliances; it also leads to an overall larger amount of anchorage loss.

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