scholarly journals Mandibular rotation during the transitional dentition

2012 ◽  
Vol 83 (1) ◽  
pp. 29-35 ◽  
Author(s):  
Hiroshi Ueno ◽  
Rolf G. Behrents ◽  
Donald R. Oliver ◽  
Peter H. Buschang
Keyword(s):  
Developmental Stages ◽  
Primary Dentition ◽  
Mixed Dentition ◽  
Moderate Correlation ◽  
Weak Correlation ◽  
Apparent Rotation ◽  
Class Differences ◽  
Lateral Cephalograms ◽  
Permanent Molars ◽  
Growth Changes

Abstract Objective: To determine whether dentoalveolar changes or vertical condylar growth is more closely related to the true forward rotation of the mandible during the transition between the late primary and early mixed dentition stages of development. Materials and Methods: The sample included 50 subjects (25 males and 25 females) with Class I (N  =  25) and Class II (N  =  25) molar relationships. They were selected based on the availability of lateral cephalograms at two developmental stages: T1: last film with complete primary dentition (5.8 ± 0.4 years) and T2: first film with permanent incisors and permanent molars fully erupted (8.0 ± 0.2 years). Seventeen landmarks were identified and 22 measurements were calculated. The mandibles at T1 and T2 were superimposed using natural reference structures in order to measure true mandibular rotation. Results: The mandible underwent −2.4° ± 2.6° of true rotation, 1.9° ± 2.4° of remodeling, and −0.6° ± 1.8° of apparent rotation. There were no significant sex or Class differences in true rotation, remodeling, and apparent rotation. There was a moderate correlation (r  =  0.76) between true rotation and remodeling and a moderately low correlation (r  =  0.40) between true rotation and apparent rotation. There was a weak correlation between true rotation and SNA (r  =  0.28). True rotation was most closely associated with the increases in U1/S-N (r  =  −0.34), increases in U1/PP (r  =  −0.36), and decreases in Id-Me (r  =  0.36). Conclusions: Independent of sex and Class, the true mandibular rotation that occurred between the late primary and early mixed dentition was mostly masked by angular remodeling, resulting in limited amounts of apparent rotation. True rotation was significantly related to anterior dentoalveolar changes but not to the vertical growth changes that occurred.

scholarly journals Mandibular Rotation and Remodeling Changes during Early Childhood

2009 ◽  
Vol 79 (2) ◽  
pp. 271-275 ◽  
Author(s):  
Malanie K. Wang ◽  
Peter H. Buschang ◽  
Rolf Behrents
Keyword(s):  
Sex Differences ◽  
Developmental Stages ◽  
Class Ii ◽  
Cranial Base ◽  
Mixed Dentition ◽  
Class I ◽  
Childhood And Adolescence ◽  
Growth Study ◽  
Apparent Rotation ◽  
Lateral Cephalograms

Abstract Objective: To describe the mandibular rotation and remodeling of younger children. Materials and Methods: The sample included 43 males and 43 females who participated in the Bolton-Brush Growth Study at Case Western Reserve University in Ohio. They were chosen on the basis of having Class I (n = 45) or Class II (n = 41) molar relationships and longitudinal lateral cephalograms at three developmental stages of the dentition: late primary (T1: 5.7 ± 0.5 y), early mixed (T2: 8.4 ± 0.6 y), and full permanent dentition (T3: 15.4 ± 0.5 y). Each subject's cephalograms were traced and four landmarks were digitized. Cranial base and mandibular superimpositions were performed with the use of natural reference structures. Results: Yearly rates of true rotation, apparent rotation, and angular remodeling showed significant (P < .05) changes throughout. True rotation was moderately correlated with angular remodeling and apparent rotation. Although no significant sex differences in annual rates of rotation were noted, subjects with Class I molar relationships showed significantly more angular remodeling from T2-T3 than did subjects with Class II molar relationships. Rates of true forward rotation were significantly greater with T1-T2 than with T2-T3 (1.3 and 0.7 degrees/y, respectively). Conclusion: Although significant amounts of true mandibular rotation and angular remodeling occur during childhood and adolescence, true rotation is greatest during the transition from late primary to early mixed dentition. (Angle Orthod. 2009:79; )

scholarly journals Plaque removal by manual and electric toothbrushing among children

2001 ◽  
Vol 15 (4) ◽  
pp. 296-301 ◽  
Author(s):  
Carolina Covolo da COSTA ◽  
Luiz Cesar da COSTA FILHO ◽  
Marina Lara SÓRIA ◽  
Ana Paula Rorato MAINARDI
Keyword(s):  
Statistical Analysis ◽  
Primary Dentition ◽  
The Other ◽  
Mixed Dentition ◽  
Plaque Removal ◽  
Other Hand ◽  
Electric Toothbrush ◽  
Plaque Control ◽  
First Session

The purpose of this study was to compare the effectiveness of plaque control performed with electric and manual toothbrushes. Fifteen children with primary dentition and 14 children with mixed dentition were divided in two groups and randomly assigned to utilize a manual or an electric toothbrush. In the first session, professional plaque removal was performed, and the children spent 24 hours without brushing their teeth. In the second session, plaque was disclosed and assessed on all facial and lingual surfaces. After that, all children brushed their teeth with the predetermined toothbrush. The next procedure was the disclosure and measurement of residual plaque. After a period of 7 days, the children switched the kind of toothbrush, and the same procedures were repeated. According to the statistical analysis of the results, there were no significant differences concerning plaque removal when the toothbrushes were utilized by children with mixed dentition. On the other hand, the electric toothbrush promoted significantly greater plaque removal on the lingual surfaces of teeth from children with primary dentition.

Skeletal Response to Maxillary Protraction in Patients with Cleft Lip and Palate before Age 10 Years

1994 ◽  
Vol 31 (4) ◽  
pp. 295-308 ◽  
Author(s):  
Rolf S. Tindlund
Keyword(s):  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Poor Response ◽  
Mixed Dentition ◽  
Forward Movement ◽  
Maxillary Protraction ◽  
Face Height ◽  
Lateral Cephalograms ◽  
Before And After ◽  
Maxillary Dentition

Over the last 15 years, cleft lip and palate (CLP) patients with maxillary deficiency in the care of the Bergen CLP Team have received interceptive orthopedic treatment to correct anterior and posterior crossbites during the deciduous and mixed dentition periods. The present study comprises 72 subjects of various cleft types with anterior crossbite, treated to an acceptable positive overjet by maxillary protraction using a facial mask (Delaire). Lateral cephalograms were taken immediately before and after the active treatment periods. Individuals exhibiting a favorable (fair) skeletal response to the protraction were compared with those who revealed little, (poor) skeletal response. Two cephalometric variables were chosen for the evaluation of the sagittal skeletal treatment changes: (1) the sagittal maxillomandibular change (change of angle ss-n-sm [ANB]); and (2) the forward movement of the maxilla (change of distance NSP-maxp), where maxp (maxillary point) represents the anterior contour of maxilla and NSP is the perpendicular to the naslon-sella-line (NSL) through sella. A numerical change greater than or equal to the value 1.5 (degrees or mm, respectively) was classified as fair versus poor response revealing a change less than 1.5. Fair-response (favorable response) of sagittal maxillomandibular change was found in 63 % of the cases (mean increase of angle ANB was 3.3 degrees), more often when protraction started early. The length of maxilla was increased, the skeletal maxilla was moved forward 1.8 mm, the upper dentition advanced 3.6 mm, the occlusal line was clockwise rotated, and the anterior face height was increased. Similarly, fair-response of forward movement of maxilla was found in 44% of the cases (mean increase of distance NSP-maxp was 2.4 mm), more often when protraction was started early and after long treatment duration. The maxillary prognathism increased 1.8 degrees, the angle ANB increased 3 degrees, the length of maxilla increased 1.5 mm, and the upper dentition was advanced 3.7 mm. The anterior face height increased with counterclockwise rotation of the nasal line, whereas the occlusal line was clockwise rotated. A paired fair-response of both skeletal maxillomandibular change and skeletal forward movement of maxilla was found in 35% of the cases. During protraction the mean increase of maxillary prognathism was 2.1 degrees, the maxilla moved forward 3.1 mm, the maxillary dentition advanced 4.3 mm, the maxillary length increased 1.9 mm, the ANB angle increased 3.7 degrees, and the lower anterior facial height increased 3.4 mm.

Orthopedic Protraction of the Upper Jaw in Cleft Lip and Palate Patients during the Deciduous and Mixed Dentition Periods in Comparison with Normal Growth and Development

1993 ◽  
Vol 30 (2) ◽  
pp. 182-194 ◽  
Author(s):  
Rolf S. Tindlund ◽  
Per Rygh ◽  
Olav E. Bøe
Keyword(s):  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Normal Growth ◽  
Mixed Dentition ◽  
Deciduous Dentition ◽  
Lower Jaw ◽  
Lateral Cephalograms ◽  
Anterior Position ◽  
Upper Jaw ◽  
Posterior Position

Cleft lip and palate (CLP) patients often develop maxillary retrusion after cleft repair. Since 1977, a group of 98 cases with negative overjet (anterior crossbite) during the period of deciduous dentition has been treated by the Bergen CLP team. The purpose of treatment has been to achieve favorable occlusion with positive overjet and overbite by means of anterior orthopedic traction (protraction). The average age at start of treatment was 6 years 11 months, and mean treatment duration was 13 months. The protraction force was 700 g. The serial lateral cephalograms of the treated CLP group were compared with those of a noncleft group with normal growth. Normalization of the sagittal maxillomandibular relationship (ANB angle) was achieved. Significant changes were a more anterior position of the upper jaw, and a more posterior position of the lower jaw, due to mandibular clockwise rotation. The variation was considerable. This paper reports the overall changes in the whole CLP group (ALL-C group).

scholarly journals Early Diagnosis of Bilateral Supplemental Primary and Permanent Maxillary Lateral Incisors: A Case Report

2011 ◽  
Vol 05 (02) ◽  
pp. 215-219 ◽  
Author(s):  
Gozde Yildirim ◽  
Sule Bayrak
Keyword(s):  
Case Report ◽  
Early Diagnosis ◽  
Permanent Dentition ◽  
Primary Dentition ◽  
Mixed Dentition ◽  
Diagnosis And Treatment ◽  
Supernumerary Teeth ◽  
Delayed Eruption ◽  
Normal Shape ◽  
Shape And Size

ABSTRACTSupernumerary teeth occur frequently in permanent dentition, but they are rarely found in primary dentition. Supernumerary teeth of orthodox shape and size that resemble normal dentition are called ‘supplemental teeth’. Supplemental teeth are less common than supernumerary teeth and are often overlooked because of their normal shape and size. Supplemental teeth may cause esthetic problems, delayed eruption and crowding, and they require early diagnosis and treatment to prevent complications. The case reported here is one of bilateral supplemental teeth impeding the eruption of permanent maxillary lateral incisors, and it emphasizes the importance of early diagnosis and treatment during early mixed dentition. (Eur J Dent 2011;5:215-219)

scholarly journals Full Mouth Rehabilitation of Two Siblings with Dentinogenesis Imperfecta Type II Using Different Treatment Modalities

2020 ◽  
Vol 17 (19) ◽  
pp. 7029
Author(s):  
Murad Alrashdi ◽  
Jason Schoener ◽  
Claudia Isabel Contreras ◽  
Shuo Chen
Keyword(s):  
Treatment Protocol ◽  
Well Being ◽  
Primary Dentition ◽  
Clinical Severity ◽  
Mixed Dentition ◽  
Treatment Modalities ◽  
Type Ii ◽  
Dentinogenesis Imperfecta ◽  
First Case ◽  
Full Mouth Rehabilitation

Background: Dentinogenesis imperfecta (DGI) is a complex anomaly, not only by its structure but by treatment approach. The treatment protocol depends on the severity, behavior, and the age of the patient. Case Description: This paper presents two siblings’ cases of DGI type II (DGI-II) with different treatment based on the patient’s clinical severity, behavior, and age (mixed versus primary dentition). The first case involves a patient in the primary dentition with severe attrition leading to a reduction in the vertical dimension of occlusion (VDO) treated by the fabrication of complete overlay dentures. The second case involves a patient in the early mixed dentition treated with restorations and extractions. Conclusion: Full mouth rehabilitation in the two patients dramatically improves function, aesthetics, and proved to be a significant psychological boost to the patient’s well-being. Practical Implications: Early diagnosis and a multidisciplinary approach for patients with DGI to preserve the remaining teeth and rehabilitation for their function and aesthetics are essential for obtaining a favorable prognosis.

Validation of Painreportit Neuropathic Pain Scale in African American Adults with Sickle Cell Disease

Blood ◽  
2016 ◽  
Vol 128 (22) ◽  
pp. 3525-3525 ◽  
Author(s):  
Keesha Roach ◽  
Robert E Molokie ◽  
Zaijie Jim Wang ◽  
Mariam O Ezenwa ◽  
David Shuey ◽  
...  
Keyword(s):  
Chronic Pain ◽  
Neuropathic Pain ◽  
Pain Intensity ◽  
Sickle Cell ◽  
Pain Scale ◽  
Moderate Correlation ◽  
Cell Disease ◽  
Weak Correlation ◽  
Average Pain Intensity ◽  
Average Pain

Abstract Background: Pain in sickle cell disease (SCD) has been thought to be episodic, but more recent evidence has shown that individuals in this population also suffer from chronic pain likely resulting from central or peripheral neural damage (neuropathic pain). There is accumulating evidence from human and animal studies indicating potential neuropathic pain in SCD. A number of valid and reliable measures of neuropathic pain have been used to differentiate neuropathic from non-neuropathic types of pain. PAINReportIt, which takes about 10 to 18 minutes to complete, is a computer based self-report pain assessment tool based on the 1970 version of the McGill Pain Questionnaire. From PAINReportIt, a new subscale has been proposed as a measure of neuropathic pain that sums the number of neuropathic pain quality words selected. The PAINReportIt number of neuropathic pain (PR-NNP) scale, however, lacks validation in patients with SCD. Aim: The purpose of this study was to determine the construct validity for the PR-NNP by examining the associations between the PR-NNP and other valid and reliable measures of neuropathic pain (self-administered Leeds Assessment of Neuropathic Symptoms and Signs [S-LANSS] and the Neuropathic Pain Symptom Inventory [NPSI]) among adults with SCD. We hypothesized that the PR-NNP scores would be significantly correlated with S-LANSS and NPSI scores. Methods: This prospective instrument validation study was conducted in an ambulatory research setting with 79 adults diagnosed with SCD who had chronic pain within the prior 12 months (>3 on a 0-10 pain scale). The sample mean age was 36.0 ± 11.5 [ranged from 19-74 years], 63% were female, and 97% reported they were African American. The participants were asked to complete self-reported pain measures (PR-NNP, S-LANSS, NPSI, and PR-NNoc [number of nociceptive pain words]). Descriptive, correlational, and regression analyses were used. Results: Mean scores for average pain intensity, PR-NNP, NSPI, S-LANSS, and PR-NNoc appear in Table 1. Bivariate results indicated moderate correlation between the two validated measures of neuropathic pain (NPSI and S-LANSS; r= .57, p=.000). The NPSI was moderately correlated with PR-NNP (r= .43, p=.000), and weakly correlated with PR-NNoc (r=.35, p=.002). For S-LANSS, there was a moderate correlation with PR-NNP (r=0.41, p=.000) and a weak correlation with PR-NNoc (r=.30, p=.007). There was a weak correlation between average pain intensity and NPSI and S-LANSS, r=.37, p=.001 and r=.36, p=.001, respectively. Regression analysis including average pain intensity, PR-NNP, and PR-NNoc as predictors showed that controlling for PR-NNP and average pain, PR-NNoc was not significantly associated with either NPSI (p=.930) or S-LANSS (p=.731), while each point of increase in PR-NNP was associated with an increase of 1.9 (p=.004) in NPSI and of 0.8 (p=.003) in S-LANSS. The same analysis showed that a one point increase in the average pain intensity was associated with an increase of 2.7 (p=.001) in NPSI and of 1.0 (p=.001) in S-LANSS. Conclusions: Both average pain intensity and PR-NNP but not PR-NNoc have unique explanatory properties of both indicators of neuropathic pain (NPSI and S-LANSS). These findings support the construct validity of the PR-NNP as a potential screening tool for neuropathic pain in patients with SCD. Validation of PR-NNP is important for future neuropathic pain research in the sickle cell population, particularly in cases of multi-site trials, and in cases where the practitioner can detect the potential presence of neuropathic pain without use of expensive equipment. These findings are important because pain management in the sickle cell population often includes opioids, but easy and early detection of neuropathic pain could result in an opioid sparing pain management approach in this population. Disclosures No relevant conflicts of interest to declare.

Localization of first permanent molars in lateral cephalometric and panoramic radiographs from early mixed dentition to early permanent dentition

2001 ◽  
Vol 25 (4) ◽  
pp. 303-306 ◽  
Author(s):  
Hung-Huey Tsai
Keyword(s):  
Permanent Dentition ◽  
Mixed Dentition ◽  
Panoramic Radiographs ◽  
Permanent Molars ◽  
First Permanent Molars

Changes in position and mesiodistal angulations of maxillary and mandibular first permanent molars from early mixed dentition to early permanent dentition were measured on panoramic radiographs and compared with the values measured on lateral cephalometric radiographs. It was found that the maxillary and mandibular first permanent molars were uprighted gradually, drifted mesially and vertically, and that the changes in mesiodistal angulations were clearly on the panoramic radiographs in comparison with the cephalometric radiographs.

scholarly journals Influence of intentional ankylosis of deciduous canines to reinforce the anchorage for maxillary protraction

2013 ◽  
Vol 18 (1) ◽  
pp. 94-102 ◽  
Author(s):  
Luís Fernando Castaldi Tocci ◽  
Omar Gabriel da Silva Filho ◽  
Acácio Fuziy ◽  
José Roberto Pereira Lauris
Keyword(s):  
Mixed Dentition ◽  
Control Group ◽  
Class Iii ◽  
Maxillary Expansion ◽  
Significant Treatment ◽  
Maxillary Protraction ◽  
Lateral Cephalograms ◽  
Treatment Changes ◽  
And Gender ◽  
Cephalometric Study

INTRODUCTION: This retrospective cephalometric study analyzed the influence of intentional ankylosis of deciduous canines in patients with Class III malocclusion and anterior crossbite, in the deciduous and early mixed dentition stages, treated by orthopedic maxillary expansion followed by maxillary protraction. METHODS: Lateral cephalograms of 40 patients were used, divided in 2 groups paired for age and gender. The Ankylosis Group was composed of 20 patients (10 boys and 10 girls) treated with induced ankylosis and presenting initial and final mean ages of 7 years 4 months and 8 years 3 months, respectively, with a mean period of maxillary protraction of 11 months. The Control Group comprised 20 patients (10 boys and 10 girls) treated without induced ankylosis, with initial and final mean ages of 7 years 8 months and 8 years 7 months, respectively, with a mean period of maxillary protraction of 11 months. Two-way analysis of variance and covariance analysis were applied to compare the initial and final cephalometric variables and the treatment changes between groups. RESULTS: According to the results, the variables evidencing the significant treatment changes between groups confirmed that the intentional ankylosis enhanced the sagittal response of the apical bases (Pg-NPerp) and increased the facial convexity angles (NAP and ANB). CONCLUSIONS: The protocol involving intentional ankylosis of deciduous canines enhanced the sagittal response of the apical bases.

scholarly journals Molar Changes with Cervical Headgear Alone or in Combination with Rapid Maxillary Expansion

2008 ◽  
Vol 78 (5) ◽  
pp. 847-851 ◽  
Author(s):  
Marcel Marchiori Farret ◽  
Eduardo Martinelli S. de Lima ◽  
Vanessa Pereira Araújo ◽  
Susana Maria Deon Rizzatto ◽  
Luciane Macedo de Menezes ◽  
...  
Keyword(s):  
Class Ii ◽  
Rapid Maxillary Expansion ◽  
Control Group ◽  
Maxillary Expansion ◽  
Lateral Cephalograms ◽  
Cervical Traction ◽  
Permanent Molars ◽  
Group 2 ◽  
First Permanent Molars ◽  
Group 1

Abstract Objective: To test the hypothesis that there is no difference in the distal movement of the maxillary first permanent molars when cervical headgear is used alone or in combination with rapid maxillary expansion. Materials and Methods: The sample was composed of 36 subjects (aged 9 to 13 years), treated in the Faculty of Dentistry, Pontifícia Universidade Cat;aaolica, Rio Grande do Sul, Brazil. The individuals were in good health and in their pubertal growth period. All had Class II division 1 malocclusion. The patients were divided into two groups: group 1 (22 subjects), Class II, with a normal transverse maxilla treated with cervical traction headgear (HG) 400 g 12 h/d, and group 2 (14 subjects), Class II maxillary transverse deficiency treated with rapid maxillary expansion plus cervical traction headgear (RME + HG). An additional group 3 (17 subjects) served as a control group and included individuals with the same characteristics. All subjects had two lateral cephalograms: initial (T1) and progress (T2), taken 6 months later. Differences between T1 and T2 were compared with the Student's t-test, and three groups were compared by the analysis of variance and Tukey multiple comparison test. Results: Results showed greater distal tipping and greater distal movement of the first permanent molars in group 1 (HG) than in group 2 (RME + HG), P < .05. No extrusion of first permanent molar occurred in either group (P > .05). Conclusion: The hypothesis was rejected. Cervical traction headgear alone produced greater distal movement effects in maxillary first permanent molars when compared with rapid maxillary expansion associated with cervical headgear.

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