Mesiodistal root angulation of permanent teeth in children with mixed dentition and normal occlusion

Aim: To present the report of a female patient, 10 years old, referred for treatment in the Dentistry Clinic of a Brazilian public university.Case report: The patient's oral health condition was unfavorable with biofilm accumulation, pain report and chewing difficulty. After anamnesis, clinical and radiographic examination, the treatment plan included removal of infectious foci (54, 55, 64, 65, 74, 75, 85, 16, 36 and 46) followed by prosthetic rehabilitation. At this stage, the functional restoration of the lower arch was restricted by the imminent eruption of the premolars. In the upper arch, the maintenance of the mesio-distal diameters aims to guarantee the chronological sequence of successors irruption and establishment of normal occlusion. During the monthly follow-up consultations the patient presents a more spontaneous smile, although she still needs constant reinforcement in oral hygiene habits.Conclusions: The rehabilitation of patients with loss of permanent teeth during the mixed dentition phase should consider the peculiarities of this period for the restoration of health without altering the normal pattern of occlusal development.

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Resorption of multirooted temporary teeth in children with dentofacial anomalies in accordance with the orthopantomography data

Стоматология детского возраста и профилактика ◽

10.33925/1683-3031-2020-20-3-235-241 ◽

2020 ◽

Vol 20 (3) ◽

pp. 235-241

Author(s):

F. S. Ayupova ◽

S. N. Alekseenko ◽

V. Ya. Zobenko ◽

T. V. Gayvoronskaya

Keyword(s):

Primary Teeth ◽

Root Resorption ◽

Type A ◽

Mixed Dentition ◽

Permanent Teeth ◽

Primary Molars ◽

Second Primary ◽

X Rays ◽

Primary Molar ◽

Posterior Teeth

Relevance. To study the incidence of different types of resorption of multirooted primary teeth, to specify indications for deciduous molar extraction to prevent eruption abnormalities of permanent posterior teeth in mixed dentition.Materials and methods. Root resorption of 375 multirooted primary teeth (166 first primary molars and 209 second primary molars) was studied on panoramic X-rays of 60 children (30 girls and 30 boys) aged between 7 and 15. Illustrated classification by T.F. Vinogradova (1967) improved by authors was used to determine type and degree of root resorption of multi-rooted primary teeth. Received data were described with absolute values of number of cases and percentage. Chi-square was used to detect differences in sign incidence rate between groups, p<0.05 was considered statistically significant.Results. There were no statistically significant gender differences (p>0,05) in type and degree of root resorption of multirooted primary teeth. Type A resorption prevailed and constituted 53.3% of all primary molars. Disturbances in root resorption of multirooted primary teeth in mixed dentition were related to health condition of primary teeth. Transition of even resorption to unven was considered a risk factor of delayed eruption and aberrant position of permanent teeth, and indication for extraction of a primary molar in question. Conclusions. 1) Even root resorption (type A) was detected in 53.3% of primary molars in mixed dentition by orthopantomography. 2) Transition from even resorption of primary molar roots to uneven resorption was associated with eruption deviations and delayed premolar eruption. 3) Timely extraction of primary molars with uneven root resorption facilitated correct eruption of premolars and increased effectiveness of secondary prevention of malocclusion in children.

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Comparison of Tooth Widths, Arch Widths and Arch Lengths in Class-I Normal Dentition to Class-I and II Crowded Dentitions

Pakistan Journal of Medical Sciences ◽

10.12669/pjms.37.2.3240 ◽

2021 ◽

Vol 37 (2) ◽

Author(s):

Hafiza Zobia Shafique ◽

Rumeesha Zaheer ◽

Abdullah Jan ◽

Ayesha Fazal

Keyword(s):

Treatment Planning ◽

Armed Forces ◽

Class Ii ◽

Vital Role ◽

Class I ◽

Permanent Teeth ◽

Creative Commons ◽

Normal Occlusion ◽

Complete Set ◽

Open Access Article

Background and Objective: Dental study casts play a vital role in the diagnosis and treatment planning of various orthodontic cases. This study was carried out to compare the tooth widths, arch widths, and arch lengths in Class-I normal dentition to those in Class-I and Class-II crowded dentition in an effort to improve treatment planning and to eventually reduce treatment duration. Methods: Total 170 patients, 12 to 40 years of age with a complete set of permanent teeth till 1st molars; who presented to the Orthodontics Department at Armed Forces Institute of Dentistry (A.F.I.D), Rawalpindi from Sep 2019 to Feb 2020, were included in the study. Non-probability purposive method of sampling was used. The dental casts obtained were used to measure tooth widths, arch widths, and arch lengths. Subjects were classified into Class-I normal and Class-I and Class-II crowded occlusion and comparison of the sum of tooth widths, arch widths, and arch length discrepancies were determined among the three occlusion groups. Data was analyzed in SPSS version 21 and independent samples t-test was used to differentiate the variables of interest. Results: Out of 170 subjects, 73 (42.9%) subjects had Class-I normal occlusion while 97 (57%) had Class-I and Class-II crowded occlusions. No statistical difference was found between the occlusal groups with regard to the sum of tooth widths, inter-canine widths, inter-first premolar widths, inter-second premolar widths and inter-molar widths. However, a remarkable difference was observed between the occlusal groups with respect to arch perimeters and arch length discrepancies (p = 0.000 and 0.000 respectively). Conclusions: Results of the current study indicate that crowding of teeth occurs as a consequence of decreased arch perimeters which may lead to increased arch length discrepancies. However, no prominent difference was noticed in the sum of tooth widths and arch widths among different occlusal groups. doi: https://doi.org/10.12669/pjms.37.2.3240 How to cite this:Shafique HZ, Zaheer R, Jan A, Fazal A. Comparison of Tooth Widths, Arch Widths and Arch Lengths in Class-I Normal Dentition to Class-I and II Crowded Dentitions. Pak J Med Sci. 2021;37(2):---------. doi: https://doi.org/10.12669/pjms.37.2.3240 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Primary failure of eruption: Clinical and genetic findings in the mixed dentition

The Angle Orthodontist ◽

10.2319/062717-430.1 ◽

2018 ◽

Vol 88 (3) ◽

pp. 275-282 ◽

Cited By ~ 5

Author(s):

Cristina Grippaudo ◽

Concetta Cafiero ◽

Isabella D'Apolito ◽

Beatrice Ricci ◽

Sylvia A. Frazier-Bowers

Keyword(s):

Clinical Evidence ◽

Mutational Analysis ◽

Mixed Dentition ◽

Permanent Teeth ◽

Phenotype Correlation ◽

Posterior Teeth ◽

Coding Regions ◽

Primary Failure Of Eruption ◽

Parathyroid Hormone 1 Receptor ◽

In Silico Analyses

ABSTRACT Objective: To test the hypothesis that mutations in the parathyroid hormone 1 receptor (PTH1R) include effects in both primary and permanent teeth. Materials and Methods: DNA was extracted from saliva samples of 29 patients (8 familial and 21 sporadic) who presented with clinical evidence of infraoccluded teeth, and their unaffected relatives (N = 22). Sequencing followed by mutational analysis of the coding regions of PTH1R gene was completed for all individuals (N = 29). Results: Eight of 29 cases revealed a heterozygous pathogenic variant in the PTH1R gene; five of eight variants represented distinct mutations based on comparison with the dbSNP, HGMD, and ESP databases. One mutation (c.1765 T>C p.Trp89Arg) was found to segregate within a family (n = 3). In silico analyses for all variants revealed a putative pathogenic effect. A genotype-phenotype correlation was reported as defined by a functional mutation in PTH1R and corresponding effects on one or more posterior teeth only; unilateral or bilateral involvement, infraoccluded primary teeth. Conclusions: Novel mutations were reported in the PTH1R gene that included PFE-affected primary molars, thus providing the basis for using a genetic diagnostic tool for early diagnosis leading to proper management.

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Three-dimensional evaluation of forced unilateral posterior crossbite correction in the mixed dentition: a randomized controlled trial

European Journal of Orthodontics ◽

10.1093/ejo/cjz054 ◽

2019 ◽

Vol 42 (4) ◽

pp. 415-425 ◽

Cited By ~ 1

Author(s):

Ola Sollenius ◽

Aljaž Golež ◽

Jasmina Primožič ◽

Maja Ovsenik ◽

Lars Bondemark ◽

...

Keyword(s):

Controlled Trial ◽

Three Dimensional ◽

Mixed Dentition ◽

Projection Area ◽

Treatment Groups ◽

Posterior Crossbite ◽

Randomized Controlled ◽

Normal Occlusion ◽

Treatment Changes ◽

Quad Helix

Summary Objectives The objectives of this study were to assess the three-dimensional (3D) treatment changes (palatal surface area and volume) of forced unilateral posterior crossbite correction using either quad-helix or removable expansion plate appliances in the mixed dentition, and to compare the treatment changes with the three-dimensional changes occurring in age-matched untreated unilateral posterior crossbite patients as well as in subjects with normal occlusion and with no or mild orthodontic treatment need. Trial design Six-arm parallel group multicentre randomized controlled trial. Materials and methods One-hundred and thirty-five patients with unilateral posterior crossbite with functional shift were recruited. The patients were randomized by an independent person not involved in the trial. The randomization used blocks of 25, and the patients were randomized into the following five groups: quad-helix treatments in specialist orthodontic clinics (QHS), quad-helix treatments in general dentistry (QHG), removable expansion plate treatments in specialist orthodontic clinics (EPS), removable expansion plate treatments in general dentistry (EPG), and untreated crossbite (UC). Twenty-five patients with normal occlusion who served as normal controls were also included in the trial. Blinding of the outcome assessor and data analyst was accomplished. Data on all children were evaluated on an intention-to-treat basis, regarding 3D palatal surface area, palatal projection area, and palatal shell volume; two-dimensional linear measurements were registered at the same time. Results After treatment, the surface and projection area and shell volume increased in the four treatment groups (QHS, QHG, EPS, and EPG). QHS increased significantly more than EPG for the surface and projection area. The QHS and EPS had significantly higher mean difference for shell volume. Limitations The trial considers a short-term evaluation. Conclusion After treatment, there were no significant differences between the four treatment groups and the normal group, which implies that the surface and projection area together with the shell volume for the four treatment groups and the normal group were equivalent. Trial registration The trial was registered with https://www.researchweb.org/is/sverige, registration number: 220751.

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Dental Caries in Children and Adolescents During and After Antineoplastic Chemotherapy

Journal of Clinical Pediatric Dentistry ◽

10.17796/1053-4628-42.3.11 ◽

2018 ◽

Vol 42 (3) ◽

pp. 225-230

Author(s):

Dorota Olczak-Kowalczyk ◽

Ewa Krasuska-Sławińska ◽

Agnieszka Brożyna ◽

Anna Turska-Szybka ◽

Bożenna Dembowska-Bagińska

Keyword(s):

Children And Adolescents ◽

Healthy Subjects ◽

Dental Hygiene ◽

Mixed Dentition ◽

Permanent Teeth ◽

White Spot Lesions ◽

Icdas Ii ◽

High Incidence ◽

Antineoplastic Treatment ◽

Antineoplastic Chemotherapy

Objective: To assess caries incidence, intensity, and treatment in children and adolescents under/after antineoplastic treatment. Study design: Patients with permanent and mixed dentition were divided into three groups of 60 patients each (5–18 years): CH – under chemotherapy; PCH – after chemotherapy; CG – generally healthy subjects. Caries incidence, intensity (DMFT/dmft, DMFS/dmfs), and mean numbers of teeth/surfaces with white spot lesions–WSL (D1+2/d1+2) were assessed following the ICDAS-II criteria. Statistical analysis: Mann-Whitney U test, significance at p≤0.05). Results: Caries incidence was significantly higher in PCH and CH (88.33% and 90%) than in CG (66.66%). Caries intensity was higher in both mixed and permanent dentition in patients under and after chemotherapy. The DMFS/DMFT correlation was the highest in PCH. Treatment indexes for primary and permanent teeth treatment were significantly lower in PCH and CH than CG. Conclusion: Antineoplastic chemotherapy is associated with caries development and its high incidence during/after treatment. As dental hygiene was poor in patients under and after antineoplastic treatment, dental checkups need to be more frequent and thorough.

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Prevalence of malocclusion among school Children of Kathmandu, Nepal

Orthodontic Journal of Nepal ◽

10.3126/ojn.v9i1.25693 ◽

2019 ◽

Vol 9 (1) ◽

pp. 59-62

Author(s):

Manju Bajracharya ◽

Sunanda Sundas ◽

Resina Pradhan ◽

Surendra Maharjan

Keyword(s):

School Children ◽

Cross Sectional Study ◽

Mixed Dentition ◽

Class I ◽

Class Iii ◽

Class Iii Malocclusion ◽

Cross Sectional ◽

Normal Occlusion ◽

Significant Difference ◽

Study Population

Introduction: this study was carried to understand Prevalence of malocclusion among the school children of Kathmandu, Sorakhutte residing near school during mixed dentition period. A sample of 600 children ; 365 male, 235 female in age group of 6-13yrs was selected randomly from different school of Kathmandu city. The aim of our study is to find out prevalence of malocclusion among the mixed detention children of Kathmandu. Materials & Method: Data was collected using direct observation of the subjects, Descriptive cross-sectional study method was used in this research. Occlusal assessment were done according to angle’s classification and dewey’s modification type of class I, class III malocclusion. Result: Subjects with normal occlusion was found to be 59.3% and with malocclusion was found to 40.7%. Among them class I malocclusion was majority of (57%) of study population, crowded incisors and significant difference was observed between male and female in the study. Conclusion: This study helps to access the prevalence malocclusion and need of orthodontic treatment for the mixed dentition period children.

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Time dependent changes of variables associated with malocclusion in patients with Duchenne muscular dystrophy

Journal of Clinical Pediatric Dentistry ◽

10.17796/jcpd.27.1.8w14853220g47593 ◽

2003 ◽

Vol 27 (1) ◽

pp. 53-61 ◽

Cited By ~ 6

Author(s):

Shinichi Matsumoto ◽

Takanobu Morinushi ◽

Tadashi Ogura

Keyword(s):

Duchenne Muscular Dystrophy ◽

Muscular Dystrophy ◽

Developmental Stages ◽

Open Bite ◽

Craniofacial Morphology ◽

Time Dependent ◽

Mixed Dentition ◽

Dental Arch ◽

Transverse Expansion ◽

Normal Occlusion

Time dependent changes of parameters associated with malocclusion in patients with Duchenne muscular dystrophy (DMD) were examined in four dental developmental stages in 34 patients.We adopted activities of daily living (ADL) score, dental arch, craniofacial morphology, and electromyograms of the masseter and temporalis muscle as parameters. A comparison was made with the results in DMD subjects to data from healthy subjects with normal occlusion reported in the literature. In DMD subjects, manifestations of open-bite were related to ADL score, sagittal shortening and transverse expansion of the dental arch and vertical overgrowth of the lower jaw. Posterior cross-bite malocclusion was associated with differences in the time dependent changes between the jaws in transverse expansion. The malocclusion in DMD subjects was also related to the time dependent disproportional changes in masticatory muscle function by EMG. Occlusal deviation in DMD subjects became apparent at the late mixed dentition and malocclusion became definitely manifest from early permanent dentition.

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The prevalence of orthodontic treatment need and malocclusion problems in 8–9-year-old schoolchildren: A study in the south of Thailand

APOS Trends in Orthodontics ◽

10.25259/apos-3-2019 ◽

2019 ◽

Vol 9 ◽

pp. 99-104 ◽

Cited By ~ 1

Author(s):

Sirate Rapeepattana ◽

Angkana Thearmontree ◽

Supanee Suntornlohanakul

Keyword(s):

Orthodontic Treatment ◽

Class Ii ◽

Mixed Dentition ◽

Class I ◽

Class Iii ◽

The South ◽

Cross Sectional Survey ◽

Cross Sectional ◽

Treatment Need ◽

Normal Occlusion

Aims This study aims to find the prevalence of orthodontic treatment need and malocclusion problems in 8–9-year-old schoolchildren in the south of Thailand. Materials and Methods A number of 202 children (100 boys and 102 girls) samples were randomly selected from all schools in Hat Yai District, Songkhla Province, Thailand. A cross-sectional survey of dental health component (DHC) of the Index of Orthodontic Treatment Need (IOTN) and malocclusion problems was investigated by clinical examination and dental model. Results Levels 4 and 5 of orthodontic treatment need according to DHC of IOTN of the sample were presented in 18.8% and 1.49%, respectively. Children who need orthodontic treatment (Grade 2–4) showed more than one highest DHC problem that indicated the level of treatment need (39.68%). Normal occlusion was found at 6.43%. Malocclusions such as Class I, Class II division 1, Class II division 2, and Class III malocclusion were observed in 78.71%, 7.92%, 3.47%, and 3.47%, respectively. Reversed overjet and overjet >9 mm were detected in 5.64% and 1.58%, respectively. Approximately half of the children (46.67%) had overbite >3.5 mm. Conclusions High percentage of children in mixed dentition period who need orthodontic treatment was found in this study. Some children who presented with the orthodontic treatment need Grade 2–4 had more than one DHC problem which identified the grade of treatment need. Class I malocclusion was most frequently found in this group of children.

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Prevalence and Distribution of Nonsyndromic Dental Anomalies in Children in Eastern Saudi Arabia: A Radiographic Study

The Scientific World JOURNAL ◽

10.1155/2021/9914670 ◽

2021 ◽

Vol 2021 ◽

pp. 1-6

Author(s):

Eman A. Bakhurji ◽

Fatima Aldossary ◽

Jood Aljarbo ◽

Fatimah AlMuhammadi ◽

Maysaa Alghamdi ◽

...

Keyword(s):

Saudi Arabia ◽

Medical History ◽

Mixed Dentition ◽

Permanent Teeth ◽

Radiographic Examination ◽

Dental Anomalies ◽

Equal Distribution ◽

Significance Level ◽

Dental Practitioners ◽

Congenitally Missing

Objectives. To report the prevalence and distribution of nonsyndromic dental anomalies in children in eastern Saudi Arabia. Methods. This retrospective records review study involved radiographic examination of 6–18 years old pediatric patients who attended the Dental Hospital of the College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia. Four calibrated examiners recorded nonsyndromic dental anomalies from patients’ digital orthopantomograms (OPG). The anomalies recorded were related to tooth number, shape, and location. Descriptive statistics, chi-square test, and Fisher exact tests were used to report prevalence and differences by gender, nationality, and medical history at the 5% significance level. Results. Of 2226 reviewed patients’ records, 1897 met the inclusion criteria and were included in the study. The study sample had equal distribution of males (52.6%) and females (47.4%) and comprised 81.2% Saudi children with a mean age of 8.8 ± 1.84 years. Most study subjects (97.8%) were in mixed dentition and 88.7% were healthy. The prevalence of dental anomalies was as follows: teeth rotations (24.5%), ectopically erupted teeth (6%), congenitally missing permanent teeth (5.4%), peg lateral (1.1%), supernumerary (0.5%), gemination (0.3%), and fusion (0.1%). No statistically significant differences were found in the distribution of dental anomalies by patients’ gender, medical history, and nationality ( p value ≥0.05). Conclusion. This study showed that teeth rotations were the most common dental anomalies followed by ectopic eruptions and congenitally missing teeth. The study findings may guide dental practitioners to better diagnose and manage children with dental anomalies in eastern Saudi Arabia.

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