scholarly journals Tooth Size and Arch Dimension in Uncrowded Versus Crowded Class I Malocclusions

2007 ◽  
Vol 8 (3) ◽  
pp. 45-52 ◽  
Author(s):  
Maryam Poosti ◽  
Tahereh Jalali
Keyword(s):  
Class I ◽  
Dental Arch ◽  
Tooth Size ◽  
Arch Width ◽  
Transverse Arch ◽  
Student’S T ◽  
Dental Arch Length ◽  
Dental Crowding ◽  
Student’S T Test ◽  
Dental Casts

Abstract Aim The purpose of this investigation was to examine the extent to which arch dimension or tooth size contributes to dental crowding. Methods and Materials Two groups of dental casts were selected. Each group consisted of 30 pairs of dental casts including equal male and female samples. The first group had Class I malocclusions without crowding or spacing. The second group exhibited Class I malocclusions with severe dental crowding (> a 5 mm space deficiency). The following parameters were measured and used to compare the two groups: individual and collective mesiodistal tooth diameters, dental arch length, as well as buccal and lingual dental arch widths in the canine and molar regions. To compare the two groups the Student's t-test with 95% confidence interval was used. Results Statistically significant differences in both tooth diameters and transverse arch dimensions were found between the two groups. The crowded group was found to have a significantly smaller maxillary arch width and larger tooth size when compared with the uncrowded group. Conclusion The results of this study suggest under equal conditions (a Class I skeletal relationship) tooth size has a greater role in developing dental crowding. Citation Poosti M, Jalali T. Tooth Size and Arch Dimension in Uncrowded Versus Crowded Class I Malocclusions. J Contemp Dent Pract 2007 March;(8)3:045-052.

scholarly journals A dissertation on tooth size and arch dimension in uncrowded versus crowded Class I malocclusion

2013 ◽  
Vol 2 (1) ◽  
pp. 1-6
Author(s):  
H Jahan ◽  
MZ Hossain
Keyword(s):  
Study Groups ◽  
Class I ◽  
Dental Arch ◽  
Tooth Size ◽  
Arch Width ◽  
Transverse Arch ◽  
Significant Difference ◽  
Dental Arch Length ◽  
Dental Crowding ◽  
Dental Casts

Aim: The purpose of this investigation was to examine the extent to which arch dimension or tooth size contributes to dental crowding. Materials and Methods: Two groups of dental casts were selected. Each group consisted of 30 pairs of dental casts including equal male and female samples. The first group had Class I malocclusion without crowding. The second group exhibited Class I malocclusion with dental crowding (more than 5 mm space deficiency). The following parameters were measured and used to compare the two groups: individual and collective mesiodistal widths of tooth, dental arch length, as well as buccal and lingual dental arch widths in the canine and molar regions. Results: Statistically significant differences in both tooth widths and transverse arch dimensions (widths) were found between the crowded and the normal groups. The crowded group was found to have a significantly smaller maxillary arch width and larger tooth size when compared with the uncrowded or normal group. There were no significant differences in arch length in the two groups in either the maxilla or the mandible. In comparing the anterior and overall Bolton ratios no significant difference was detected between the crowded and normal groups. Conclusion: The results of this study suggest under under two study groups (Class I skeletal base of crowded and uncrowded group) tooth size has a greater role in developing dental crowding. DOI: http://dx.doi.org/10.3329/bjodfo.v2i1.15994 Ban J Orthod & Dentofac Orthop, October 2011; Vol-2, No.1, 1-6

scholarly journals Is there a relationship between dental crowding and the size of the maxillary or mandibular apical base?

2019 ◽  
Vol 90 (2) ◽  
pp. 216-223 ◽  
Author(s):  
Aaron M. Crossley ◽  
Phillip M. Campbell ◽  
Larry P. Tadlock ◽  
Emet Schneiderman ◽  
Peter H. Buschang
Keyword(s):  
Class I ◽  
Cone Beam ◽  
Dental Arch ◽  
Tooth Size ◽  
Cross Sectional ◽  
Base Size ◽  
Total Cross Sectional Area ◽  
Maxilla And Mandible ◽  
Dental Crowding ◽  
Apical Base

ABSTRACT Objective: To determine whether apical base size is related to dental crowding. Materials and Methods: Digital scans of dental casts were taken of 75 untreated Class I adults to measure maxillary and mandibular tooth size, dental arch perimeters, intermolar widths, and intercanine widths. Cone beam computed tomography (CBCT) images were used to measure the apical base of the maxilla and mandible, including the total cross-sectional area, five basal arch perimeters and five basal arch widths. Principal components factor analyses were performed to evaluate the relationships between the apical base size and tooth-size-arch-length discrepancies (TSALD). Results: The dental arch and maxillary apical base measures were significantly larger in males than females. There were only limited sex differences in mandibular apical base size. The dental arch measurements were smaller in subjects with greater upper and lower TSALD. Maxillary and mandibular apical base dimensions were positively interrelated. Low-to-moderate correlations were found between the size of the maxillary apical base and TSALD. The size of the mandibular apical base was not related to upper or lower TSALD. Tooth size showed little to no relationship with TSALD. Conclusions: Although maxillary apical base size is related to maxillary and mandibular crowding in subjects with Class I malocclusion, mandibular apical base size is not.

scholarly journals Space conditions, palatal vault height, and tooth size in patients with and without palatally displaced canines: A prospective cohort study

2018 ◽  
Vol 88 (6) ◽  
pp. 726-732
Author(s):  
Julia Naoumova ◽  
Gabriel Edgardo Alfaro ◽  
Sheldon Peck
Keyword(s):  
Three Dimensional ◽  
Control Group ◽  
Dental Arch ◽  
Tooth Size ◽  
Three Dimensional Model ◽  
Arch Width ◽  
Crown Width ◽  
Dental Arch Width ◽  
Dental Arch Length ◽  
Palatal Vault

ABSTRACT Objectives: To assess palatal vault height, tooth size, and dental arch dimensions in patients with unilateral and bilateral palatally displaced canines compared with a control group. Materials and Methods: A sample of 66 patients (mean age: 11.5 ± 1.0 years) with 22 unilateral palatally displaced canines (UPDCs), 22 bilateral palatally displaced canines (BPDCs), and 22 controls (C) were consecutively recruited. All three groups had dental casts that were scanned digitally using the OrthoX three-dimensional model scanner. Tooth size, palatal vault height, dental arch width, dental arch depth, dental arch length, and dental arch space were measured by the same examiner using the GOM software. Remeasurements were made in 10 randomly identified patients. Results: The palatal vault height was significantly lower in the BPDC group compared with controls. A significantly smaller mesial-distal crown width and, in general, more spacing in the maxilla were found in the UPDC and BPDC groups. No differences in arch length or arch width at the molar region were seen between the groups, while the arch length at the canine region was smaller in the UPDC and BPDC groups. However, this was observed in BPDC patients with both deciduous canines present and in most UPDC patients where the deciduous canine was present, compared with the control group, who had more permanent canines present. Conclusions: Patients with PDC had greater reduction in tooth size compared with the control group. The arch length and arch width were similar in patients with and without PDC.

The Dentition of the Growing Child: A Longitudinal Study of Dental Development Between 3 and 18 Years of Age

PEDIATRICS ◽  
1960 ◽  
Vol 25 (3) ◽  
pp. 520-521
Author(s):  
HOWARD V. MEREDITH
Keyword(s):  
Longitudinal Study ◽  
Public School ◽  
Child Health ◽  
Dental Development ◽  
Dental Arch ◽  
Tooth Size ◽  
White Children ◽  
Health And Development ◽  
Dental Casts

This research monograph is based on dental casts for 184 white children residing in Massachusetts and Delaware. The topics discussed pertain to tooth size, dental arch size, and positional interrelationships of the teeth in the two arches. On each subject, the investigator had available a series of dental casts "covering the transition from the primary to the secondary dentition" (p. 40). The casts were amassed in part at the Center for Research in Child Health and Development, Boston (Dr. Harold C. Stuart), and in part at a public school in Wilmington, Delaware (Dr. Richard H. Stucklen).

scholarly journals THE RELIABILITY OF THE BOLTON RATIO WHEN APPLIED TO THE INDONESIAN POPULATION

2017 ◽  
Vol 10 (10) ◽  
pp. 176
Author(s):  
Joko Kusnoto
Keyword(s):  
T Test ◽  
Tooth Size ◽  
Crown Width ◽  
Indonesian Population ◽  
Significant Difference ◽  
The Mean ◽  
Anterior Ratio ◽  
Overall Ratio ◽  
Student’S T ◽  
Student’S T Test

  Objective: The objective of this study is to determine whether Bolton ratio can be applied clinically to the Indonesian population and to determine a more suitable Bolton ratio for the Indonesian population.Methods: This study was conducted on 120 readily available study models of treated cases comprising 37 males and 83 females. Two investigators separately measured the mesiodistal crown width of maxillary and mandibular tooth on each study model using sliding calipers. According to Bolton’s method, the overall and anterior ratios from each sample were calculated and the mean was generated. Using Student’s t-test with a 95% confidence interval, the investigators compared whether there is a significant difference between the ratio from Bolton’s samples and the ratio from the Indonesian samples.Results: The result of this study showed that, for Indonesian samples, the overall ratio is 89.7±2.05, while the anterior ratio is 76.4±2.76. Student’s t-test showed that there is a statistically significant difference (p<0.05) between the results of this study and that of Bolton’s study for both the anterior and overall ratios.Conclusion: It can be concluded that there is a difference between Indonesian population and Caucasian population in tooth size and Bolton ratio value. Therefore, original Bolton ratio value cannot be used as an accurate diagnostic tool for Indonesian population.

scholarly journals Angle Class I malocclusion treated with lower incisor extraction

2013 ◽  
Vol 18 (3) ◽  
pp. 150-158 ◽  
Author(s):  
Vanessa Leal Tavares Barbosa
Keyword(s):  
Class I ◽  
Dental Arch ◽  
Periodontal Health ◽  
Lower Incisor ◽  
Facial Profile ◽  
Anterior Crowding ◽  
Angle Class ◽  
Facial Esthetics ◽  
Dentofacial Orthopedics ◽  
Dental Crowding

In planning orthodontic cases that include extractions as an alternative to solve the problem of negative space discrepancy, the critical decision is to determine which teeth will be extracted. Several aspects must be considered, such as periodontal health, orthodontic mechanics, functional and esthetic alterations, and treatment stability. Despite controversies, extraction of teeth to solve dental crowding is a therapy that has been used for decades. Premolar extractions are the most common, but there are situations in which atypical extractions facilitate mechanics, preserve periodontal health and favor maintenance of the facial profile, which tends to unfavorably change due to facial changes with age. The extraction of a lower incisor, in selected cases, is an effective approach, and literature describes greater post-treatment stability when compared with premolar extractions. This article reports the clinical case of a patient with Angle Class I malocclusion and upper and lower anterior crowding, a balanced face and harmonious facial profile. The presence of gingival and bone recession limited large orthodontic movements. The molars and premolars were well occluded, and the discrepancy was mainly concentrated in the anterior region of the lower dental arch. The extraction of a lower incisor in the most ectopic position and with compromised periodontium, associated with interproximal stripping in the upper and lower arches, was the alternative of choice for this treatment, which restored function, providing improved periodontal health, maintained facial esthetics and allowed finishing with a stable and balanced occlusion. This case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO), as part of the requirements for obtaining the BBO Diplomate title.

scholarly journals Penatalaksanaan Kasus Impaksi Premolar, Ektopik Caninus dan Asimetri Rahang dengan Teknik Edgewise

2015 ◽  
Vol 1 (2) ◽  
pp. 134
Author(s):  
Novitria Zahrotul Malikha ◽  
Sri Suparwitri ◽  
Soekarsono Hardjono
Keyword(s):  
Female Patient ◽  
Primary Teeth ◽  
Class I ◽  
Permanent Teeth ◽  
Dental Arch ◽  
Midline Shift ◽  
Orthodontic Appliance ◽  
Angle Class ◽  
Dental Crowding ◽  
Fixed Orthodontic Appliance

Pencabutan dini pada gigi desidui seringkali menyebabkan perpendekan lengkung sehingga ruang yang dibutuhkan untuk erupsi gigi permanen kurang. Kaninus ektopik, impaksi premolar dan asimetri rahang adalah kasus yang sering terjadi akibat kurangnya ruang untuk erupsi gigi. Pasien perempuan usia 20 tahun, mengeluhkan gigi gingsul dan tidak rapi. Pemeriksaan objektif menunjukkan crowding rahang atas dan rahang bawah, kaninus maksila kanan atas ektopik, premolar mandibula kanan impaksi, disertai pergeseran midline. Maloklusi Angle kelas I dengan hubungan skeletal kelas I, overbite 1 mm, overjet  1,3 mm, crowding mandibula dan maksila, ektopik kaninus unilateral, impaksi premolar unilateral, asimetri rahang dan pergeseran midline. Pencabutan dilakukan pada 2 gigi premolar pertama rahang atas dan 2 gigi molar pertama rahang bawah yang mengalami nekrosis. Perawatan menggunakan alat cekat teknik Edgewise dengan multiloop. L loop digunakan untuk ekstrusi gigi kaninus ektopik dan menarik impaksi premolar. Asimetri rahang dikoreksi dengan ekspansi lengkung gigi menggunakan mainarchwire. Setelah 7 bulan perawatan, gigi kaninus yang ektopik, impaksi premolar dan crowding terkoreksi. Overjet dan overbite menjadi 2,5 mm. Perawatan masih berlangsung hingga saat ini. Penggunaan multiloop pada teknik Edgewise efektif untuk mengoreksi crowding gigi dan L loop efektif untuk mengekstrusi gigi kaninus ektopik dan impaksi premolar. ABSTRACT: Management of Impacted Premolar, Ectopic Canine and Jaw Asymmetry Case Using Edgewise Technique. The premature loss of primary teeth may reduce the arch length required for permanent teeth eruption. Ectopic canine, premolar impaction and jaw asymmetry are often encountered due to the lack of space for permanent teeth eruption. A twenty-year-old female patient complained an ectopic canine and crowding of upper and lower teeth. The objective examination found maxilla and mandibula crowding, ectopic right maxilla canine, mandibular premolar impaction, and midline shift of maxilla and mandibula. Angle class I malocclusion, overbite 1 mm, overjet 1.3 mm, maxilla and mandibula crowding, unilateral ectopic canine, unilateral premolar impaction, jaw asymmetry and midline shift occurred. Extraction of 2 maxillary first premolars and 2 necrose mandibular first molars was conducted followed by a treatment using fixed orthodontic appliance Edgewise technique with multiloop. The ectopic canine and premolar impaction were extruded using L loop. Jaw asymmetry was corrected by expanding the dental arch using the expanded main archwire. Ectopic canine, premolar impaction, maxilla and mandibula crowding were corrected after 7 months of treatment. The overjet and overbite reached 2.5 mm. The treatment is still ongoing. The multiloop edgewise archwire technique is found effective to overcome dental crowding, and L loop is effective to extrude the ectopic canine and premolar impaction.

scholarly journals Digital models: How can dental arch form be verified chairside?

2017 ◽  
Vol 22 (6) ◽  
pp. 68-73 ◽  
Author(s):  
Alana Tavares ◽  
Emanuel Braga ◽  
Telma Martins de Araújo
Keyword(s):  
Dental Arch ◽  
Digital Models ◽  
3D Scanner ◽  
Arch Models ◽  
Arch Form ◽  
Orthodontic Archwires ◽  
Dental Arch Length ◽  
Lower Arch ◽  
Dental Arch Form ◽  
Dental Casts

ABSTRACT Introduction: Plaster dental casts are routinely used during clinical practice to access maxillary dental arch form and assist on fabrication of individualized orthodontic archwires. Recently introduced, digital model technology may offer a limitation for the obtainment of a dental physical record. In this context, a tool for dental arch form assessment for chairside use is necessary when employing digital models. In this regard, paper print of the dental arch seems thus to be useful. Methods: In the present study, 37 lower arch models were used. Intercanine and intermolar widths and dental arch length measurements were performed and compared using plaster dental casts, digital models and paper print image of the models. Ortho Insight 3D scanner was employed for model digitalization. Results: No statistically significant differences were noted regarding the measurements performed on the plaster or digital models (p> 0.05). Paper print images, however, showed subestimated values for intercanine and intermolar widths and overestimated values for dental arch length. Despite being statistically significant (p< 0.001), the differences were considered clinically negligible. Conclusion: The present study suggests that paper print images obtained from digital models are clinically accurate and can be used as a tool for dental arch form assessment for fabrication of individualized orthodontic archwires.

scholarly journals Changes in lower dental arch dimensions and tooth alignment in young adults without orthodontic treatment

2015 ◽  
Vol 20 (3) ◽  
pp. 64-68 ◽  
Author(s):  
Bruno Aldo Mauad ◽  
Robson Costa Silva ◽  
Mônica Lídia Santos de Castro Aragón ◽  
Luana Farias Pontes ◽  
Newton Guerreiro da Silva Júnior ◽  
...  
Keyword(s):  
Young Adults ◽  
Orthodontic Treatment ◽  
Dental Arch ◽  
Time Intervals ◽  
The Third ◽  
Irregularity Index ◽  
Dental Crowding ◽  
Lower Arch ◽  
Paired T Test ◽  
Dental Casts

OBJECTIVE: The aim of this longitudinal study, comprising young adults without orthodontic treatment, was to assess spontaneous changes in lower dental arch alignment and dimensions. METHODS: Twenty pairs of dental casts of the lower arch, obtained at different time intervals, were compared. Dental casts obtained at T1 (mean age = 20.25) and T2 (mean age = 31.2) were compared by means of paired t-test (p < 0.05). RESULTS: There was significant reduction in arch dimensions: 0.43 mm for intercanine (p = 0.0089) and intermolar (p = 0.022) widths, and 1.28 mm for diagonal arch length (p < 0.001). There was a mild increase of approximately 1 mm in the irregularity index used to assess anterior alignment (p < 0.001). However, regression analysis showed that changes in the irregularity index revealed no statistically significant association with changes in the dental arch dimensions (p > 0.05). Furthermore, incisors irregularity at T2 could not be predicted due to the severity of this variable at T1 (p = 0.5051). CONCLUSION: Findings suggest that post-growth maturation of the lower dental arch leads to a reduction of dental arch dimensions as well as to a mild, yet significant, increase in dental crowding, even in individuals without orthodontic treatment. Furthermore, dental alignment in the third decade of life cannot be predicted based on the severity of dental crowding at the end of the second decade of life.

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