Occlusal Changes from Primary to Permanent Dentitions

1986 ◽  
Vol 13 (4) ◽  
pp. 187-193 ◽  
Author(s):  
T. D. Foster ◽  
M. C. Grundy
Keyword(s):  
Longitudinal Study ◽  
Class Ii ◽  
Permanent Dentition ◽  
Primary Dentition ◽  
Dental Arch ◽  
Mandibular Arch ◽  
The Individual ◽  
Simple Count ◽  
Maxillary Arch

A longitudinal study was undertaken to assess the persistance of occlusal features of the primary dentition at five years into the permanent dentition at 12 years. It was found that although there was a broad measure of predictability there was variation in detail which made forecasting unreliable in the individual patient. Generally speaking, incisal overjet and overbite changed very little between the two dentitions, but those changes which occurred were in both directions, and the direction of change could not be predicted. The sagittal relationships of the dental arch were also relatively stable, but where change occurred it tended to be in a Class II direction, with the mandibular arch becoming more retroposed in relation to the maxillary arch. The prediction of crowding of the permanent dentition from a simple count of spaces in the primary dentition, while generally reliable, was not accurate in every individual patient.

scholarly journals A Study on Arch Length Among Dentoalveolar Class I, Class II and Class III Malocclusion of Bangladeshi Population

2012 ◽  
Vol 9 (1) ◽  
pp. 1-3
Author(s):  
Ashis Kumar Biswas ◽  
Gazi Shamim Hassan ◽  
Nasreen Akhter ◽  
Ranjit Ghosh ◽  
Mohammad Rakibul Islam Babu
Keyword(s):  
Class Ii ◽  
Permanent Dentition ◽  
Dental Arch ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Significant Difference ◽  
Class 1 ◽  
Bangladeshi Population ◽  
Lower Arch ◽  
Maxillary Arch

Objectives : To study the variations in arch length among different classes of dento-alveolar malocclusion in the permanent dentition. Materials and Methods: Both male and female Bangladeshi subjects with permanent dentition who attended during 1st July 2007 to 1st January 2011 to the Department of Orthodontics, BSMMU for treatment were included in this study. Dental arch length were measured from dental casts of the permanent dentition of 96 Bangladeshi subjects of which 48 male, 48 female, 24 class 1, 24 class 2 div. I, 24 class 2 div. II, 24 class III. Arch length was measured by adapting a length of brass wire (diameter 0.5 mm) on the maxillary and mandibular arches. Comparison of arch length was done among different malocclusion classes. Results: In these study we found maxillary arch length was largest in class II div. 1 malocclusion. Mandibular arch length was highest in class III and lowest in class II div. 1 malocclusion. Least significant difference (LSD) is used to compare two of the four group. P<0.05 was set as the level of significance. Conclusions : Class III malocclusion has large lower arch and short upper arch. In Class II division 1, arch length is larger in upper than lower arch and Class II division 2 show the shortest maxillary arch length.DOI: http://dx.doi.org/10.3329/cdcj.v9i1.11827 City Dental College Journal Vol.9(1) 2012 1-3

scholarly journals Molariform Mesiodens in Primary Dentition

2013 ◽  
Vol 2013 ◽  
pp. 1-4
Author(s):  
Sachin B. Mangalekar ◽  
Tajammul Ahmed ◽  
M. Zakirulla ◽  
Halawar Sangmesh Shivappa ◽  
F. B. Bheemappa ◽  
...  
Keyword(s):  
Rare Case ◽  
Treatment Plan ◽  
Permanent Dentition ◽  
Primary Dentition ◽  
Occlusal Surface ◽  
Radiographic Examination ◽  
Supernumerary Tooth ◽  
Dentigerous Cysts ◽  
Delayed Eruption ◽  
Maxillary Arch

Mesiodens is a midline supernumerary tooth commonly seen in the maxillary arch, and incidence of molariform mesiodens in the maxillary midline is rare in permanent dentition and extremely uncommon in primary dentition. A midline supernumerary tooth in the primary dentition can cause ectopic or delayed eruption of permanent central incisors which will further alter occlusion and may compromise esthetics and formation of dentigerous cysts. This paper reports a rare case of the presence of a molariform mesiodens in the primary dentition. On clinical and radiographic examination, flaring of the primary central incisors was seen, with a molariform mesiodens consisting of multiple lobes or tubercles on the occlusal surface with the well-formed root. The treatment plan consisted of the extraction of the supernumerary tooth and regular observation of permanent central incisors for proper eruption and alignment.

The Relationship between Arch Dimensions and the 5-Year Index in the Primary Dentition of Patients with Complete UCLP

2002 ◽  
Vol 39 (6) ◽  
pp. 635-640 ◽  
Author(s):  
A.T. Dibiase ◽  
D.D. Dibiase ◽  
N.J. Hay ◽  
B.C. Sommerlad
Keyword(s):  
Rank Correlation ◽  
Primary Dentition ◽  
Dental Arch ◽  
Growth Study ◽  
Spearman’S Rank Correlation ◽  
Primary Surgery ◽  
Transverse Arch ◽  
Spearman’S Rank Correlation Coefficient ◽  
The Relationship ◽  
Maxillary Arch

Objective To compare dental arch dimensions of children in the primary dentition with repaired unilateral clefts of the lip and palate (UCLP) to a noncleft group of a similar age and determine how the dimensions of the cleft arches relate to an index of treatment outcome. Method Dental study casts of 44 5- to 6-year-olds with complete UCLP (22 boys and 22 girls) from a single center, whose primary surgery had been carried out by one surgeon, were matched for age, sex, and ethnicity with dental study casts from a longitudinal growth study. Analysis of variance was used to ascertain differences in arch dimensions between the two groups. The cleft group casts were then assessed with an established index of surgical outcome, the 5-year-old index. Spearman's rank correlation coefficient was used to see how the arch dimensions of the cleft group related to the categories of the index. Results and Conclusions Maxillary arch dimensions were significantly smaller in the cleft group than in the noncleft group, irrespective of sex (p < .05). In the mandibular arch, there was no difference between the cleft and noncleft groups (p > .05). Maxillary arch dimensions of the cleft group correlated significantly with the 5-year-old index for arch length and intercanine width (p < .05) but not intermolar width (p = .842). This would suggest that the 5-year-old index is a suitable tool for assessing the outcome of treatment in the primary dentition for anteroposterior and anterior transverse arch dimensions.

Expansion of the Mandibular Arch in Children during the Mixed Dentition Period - A Clinical Study

2006 ◽  
Vol 30 (4) ◽  
pp. 329-332 ◽  
Author(s):  
Kenshi Maki ◽  
Yasuhiro Sorada ◽  
Toshihiro Ansai ◽  
Takahiro Nishioka ◽  
Raymond Braham ◽  
...  
Keyword(s):  
Mixed Dentition ◽  
Dental Arch ◽  
Type I ◽  
Type Ii ◽  
Tooth Replacement ◽  
Lateral Expansion ◽  
Incisor Tooth ◽  
Mandibular Arch ◽  
The Individual ◽  
Apical Base

A review of the dental literature revealed relatively few studies on the expansion of the mandibular dental arch. The present study attempted expansion of the mandibular arch using a Bihelix appliance. The subjects were 16 children, exhibiting crowding, age ranges from 7 to 11 years. The mandible was expanded 2.0 mm every 3 months. Significant expansion, not only of the individual tooth inter-arch dimensions but also of the overall arch length, was obtained during the period of incisor tooth replacement. The mode of expansion was classified as follows: Type I, those, which showed no effect on the apical base; Type II, those which showed no consistency of the measurement lines. In this study, 6 of16 cases were classified as type I and 10 cases as type II. Expansion was continued over a period of 1.5 to 3 years. We concluded that considerable lateral expansion of the mandibular arch is possible using the Bihelix appliance. It is suggested that this might contribute greatly to non-extraction orthodontic treatment. Further studies are recommended.

Bite-opening Mechanics as Applied in the Begg Technique

1994 ◽  
Vol 21 (2) ◽  
pp. 189-195 ◽  
Author(s):  
Xu Tian-Min ◽  
Lin Jiu-Xiang ◽  
Hu Kui ◽  
Huang Jin-Fang
Keyword(s):  
Class Ii ◽  
Dental Arch ◽  
Force Magnitude ◽  
Intrinsic Quality ◽  
The Individual ◽  
Class Ii Elastics

In the Begg Technique, factors controlling the anterior intrusive force provided by the archwire have yet to be fully clarified. The rationale for bite opening with very light forces, the effect of Class II elastics on intrusive force magnitude and the intrinsic quality of ‘Australian’ wire in bite opening are examined in this paper. A formula is presented which allows the intrusive force that archwires exert in different individuals to be predicted. The values derived from the formula were compared with case model measurements. It was found that the intrusive force of the archwire was affected by the length of the individual dental arch. The magnitude of this intrusive force was seen to increase gradually during the period of bite opening and appeared to be related to the use of Class II elastics. The study revealed factors which affected the magnitude of the intrusive force.

A Longitudinal Study of the Presence of Dental Anomalies in the Primary and Permanent Dentitions of Cleft Lip and/or Palate Patients

2017 ◽  
Vol 54 (3) ◽  
pp. 309-320 ◽  
Author(s):  
Akira Suzuki ◽  
Masayuki Nakano ◽  
Keigo Yoshizaki ◽  
Atsushi Yasunaga ◽  
Naoto Haruyama ◽  
...  
Keyword(s):  
Longitudinal Study ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Permanent Dentition ◽  
Primary Dentition ◽  
University Hospital ◽  
Dental Anomalies ◽  
Males And Females ◽  
The Right ◽  
Maxillary Dentition

Objective The aim is to survey primary and permanent dental anomalies: hypodontia, microdontia, a supernumerary tooth, and fused teeth in patients with cleft lip and/or palate. Design Retrospective longitudinal study Subjects The subjects were selected from all 1724 patients with cleft lip and/or palate who were registered at the orthodontic clinic of Kyushu University Hospital, Fukuoka, Japan, from 1970 to 2009. Finally, 994 subjects were evaluated for primary dentition, 1352 for permanent dentition, and 871 for the longitudinal changes from primary to permanent dentition. Methods The prevalence of dental anomalies was compared for each tooth type, among various cleft types, between males and females, and between the alveolar cleft area and the noncleft area. Results The prevalence of hypodontia was 16.2% for primary dentition and 52.7% for permanent dentition in the subjects with cleft lip and/or palate. Hypodontia increased with the severity of the cleft type. Multiple hypodontia was found more frequently in the subjects with bilateral cleft lip and palate and the subjects with unilateral cleft lip and palate. Microformed lateral incisors were found in 22.7% of permanent lateral incisors but not in primary dentition. Supernumerary teeth were found in 17.7% of the subjects with cleft lip and/or palate for primary maxillary dentition and in 5.7% for permanent maxillary dentition. Conclusion The prevalence of hypodontia was greater in permanent dentition than in primary dentition; although, it was not much different between males and females or between the right and left sides. The prevalence of dental anomalies was significantly different among four groups by cleft type: cleft lip, cleft lip and alveolus, cleft lip and palate, and cleft palate.

Regional Odontodysplasia: Report of a case

2005 ◽  
Vol 29 (1) ◽  
pp. 45-48 ◽  
Author(s):  
Levent Özer ◽  
Serap Çetiner ◽  
Ersan Ersoy
Keyword(s):  
Male Patient ◽  
Permanent Dentition ◽  
Developmental Anomaly ◽  
Consecutive Series ◽  
Hard Tissue ◽  
Mandibular Arch ◽  
Regional Odontodysplasia ◽  
Maxilla And Mandible ◽  
Ghost Teeth ◽  
Maxillary Arch

Regional odontodysplasia is a rare developmental anomaly involving both mesodermal and ectodermal dental components in groups of contigous teeth. RO affects the primary and permanent dentition in the maxilla and mandible or both jaws. Generally, it is localized in only one arch. The maxillary arch is affected more often than the mandibular arch. The affected teeth tend to be in a consecutive series that does not cross the midline, although some cases do not follow this pattern, as in the present case, have been documented. Radiogaphically wide pulp chambers and thin poorly defined hard tissue outlines described as a "ghost teeth" appearance, are typical features. A case of regional odontodysplasia in a 5 year old male patient is presented. The clinical and radiogaphical findings of this developmental anomaly and treatment are described.

Does dental trauma in the primary dentition increases the likelihood of trauma in the permanent dentition? A longitudinal study

2016 ◽  
Vol 21 (8) ◽  
pp. 2415-2420 ◽  
Author(s):  
Marília Leão Goettems ◽  
Letícia Coutinho Brancher ◽  
Catiara Terra da Costa ◽  
Maria Laura Menezes Bonow ◽  
Ana Regina Romano
Keyword(s):  
Longitudinal Study ◽  
Dental Trauma ◽  
Permanent Dentition ◽  
Primary Dentition

scholarly journals Comparison of Changes in Dental Arch Dimensions in Cases Treated with Conventional Appliances and Self-Ligating Damon System

2018 ◽  
Vol 12 (1) ◽  
pp. 1137-1146 ◽  
Author(s):  
Naiara Carolina Jacob Lima ◽  
Izabel Cristina de Mendonça Campos Freitas Falcão ◽  
Karina Maria Salvatore de Freitas ◽  
Darwin Vaz de Lima ◽  
Fabrício Pinelli Valarelli ◽  
...  
Keyword(s):  
Treatment Time ◽  
Conventional Group ◽  
Dental Arch ◽  
Mandibular Arch ◽  
Irregularity Index ◽  
Intergroup Comparison ◽  
Show Difference ◽  
Treatment Changes ◽  
Group 2 ◽  
Maxillary Arch

Proposition: The objective of this study was to compare changes in maxillary and mandibular dental arch dimensions in cases treated nonextraction with conventional appliances and self-ligating Damon System. Materials and Methods: initial (T1) and final (T2) dental casts of 45 patients with Class I malocclusion treated nonextraction, with slight to moderate crowding, divided into two groups. Group 1: 21 patients treated with self-ligating Damon appliances, at a mean initial age of 18.37 years and mean treatment time of 2.11 years. Group 2: 24 patients treated with conventional appliances, at a mean initial age of 19.50 years and mean treatment time of 1.99 years. The model analysis was performed; Little irregularity index was used to evaluate crowding and arch form was evaluated by measurements in maxillary and mandibular arches including intercanine, interpremolar (first and second premolars) and intermolar distances and arch length. The intragroup comparison was performed with dependent t or Wilcoxon tests and intergroup comparison, with independent t or Mann Whitney tests. Results: In intergroup comparison of treatment changes (T2-T1) the Damon group presented an increase in maxillary transversal dimensions significantly greater than the conventional group. The change in maxillary arch length did not show difference between the groups. Regarding the mandibular arch, the Damon group presented a significantly greater increase in intercanine and inter first premolars than the conventional group. In The mandibular arch length, the greater and significant increase was observed in the groups of patients treated with conventional appliances. Conclusions: The treatment with the Damon appliances resulted in a significantly greater increase of maxillary arch dimensions when compared to conventional appliances. Mandibular intercanine and interpremolar distances also presented greater increase in Damon than conventional appliances. The increase in mandibular arch length was greater in conventional than in Damon group.

Sign in / Sign up

Export Citation Format

Share Document