Correlation between collum angle and lower lip position in different Class II malocclusions - A retrospective cephalometric study

Arvind, T R Prasanna; Felicita, A. Sumathi

doi:10.1080/13440241.2021.1924417

Cited by 3 publications

(8 citation statements)

References 22 publications

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“…Nine out of the 17 studies evaluated the collum angle in all these malocclusions 1,13,14,19–21,23,27,28 . Four studies had evaluated the collum angle in Class I, Class II division 1, and Class II division 2 malocclusions 4,22,25,29 . Two studies compared the collum angle of Class II division 1 and division 2 24,31 .…”

Section: Resultsmentioning

confidence: 99%

“…1,13,14,[19][20][21]23,27,28 Four studies had evaluated the collum angle in Class I, Class II division 1, and Class II division 2 malocclusions . 4,22,25,29 Two studies compared the collum angle of Class II division 1 and division 2. 24,31 One study had compared the collum angle in Class II division 2 and Class I.…”

Section: Study Characteristicsmentioning

confidence: 99%

“…19 So Class II division 1 and 2 malocclusion were not estimated individually and therefore common value of Class II malocclusion was taken for both Class II divisions 1 and 2 in this review. 19 Of the 17 studies, 13 studies used lateral cephalograms 1,4,14,16,[20][21][22][23][24][28][29][30][31] while 4 studies used CBCT for the evaluation of collum angle 13,19,25,27 Characteristics of the included studies have been compiled in Table 2.…”

Section: Study Characteristicsmentioning

confidence: 99%

“…The collum angle has been assessed by various authors and differs among sagittal malocclusions 1,4,14,16,18–26 . Though the literature reports an increased collum angle in the maxillary central incisors in Class II division 2, there is a wide variation in these values 1,4,14,19–23,27–31 . Further, two studies have reported differing collum angles for the mandibular central incisors in Class I and Class III malocclusion 19,27 .…”

Section: Introductionmentioning

confidence: 99%

“…1,4,14,16,[18][19][20][21][22][23][24][25][26] Though the literature reports an increased collum angle in the maxillary central incisors in Class II division 2, there is a wide variation in these values. 1,4,14,[19][20][21][22][23][27][28][29][30][31] Further, two studies have reported differing collum angles for the mandibular central incisors in Class I and Class III malocclusion. 19,27 With a wide variation reported in the literature, there is a need for a systematic review of the collum angle in sagittal malocclusions.…”

Section: Introductionmentioning

confidence: 99%

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Collum angle of the anterior teeth: A systematic review and meta‐analysis

Murugaiyan

Srinivasan

Kailasam

2022

J Esthet Restor Dent

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Objectives To assess and evaluate the collum angle (CA) of the anterior teeth of the permanent dentition. Methods A search in seven databases for articles that had measured the CA in sagittal malocclusions was conducted until November 30, 2021. The risk of bias was assessed using the Modified Newcastle Ottawa scale. CA measurements using Cone Beam Computed Tomography or lateral cephalograms were included. The CA data were summarized by random‐effects inverse generic meta‐analyses. Results Qualitative analysis of the 17 selected articles revealed that four were rated as “very good,” 12 as “good” and 1 as “satisfactory.” CA was 4.7° (95% CI of 3.1 to 6.4) and 2.0° (95% CI of 0.1 to 3.9) greater in Class II division 2 and Class III malocclusions respectively, than in Class I malocclusion cases. Conclusion Majority of the studies were rated as good or very good. Most studies evaluated the CA of the maxillary central incisors in Class II division 2 malocclusion. Studies assessing other maxillary anterior and mandibular anterior teeth are required. Clinical Significance Practice of esthetic dentistry for teeth with increased CA is of clinical importance since the angle would determine the longevity and esthetic/cosmetic success of the rehabilitation. Placement of dental implants in areas of missing teeth with increased collum angle leads to excessive stress between the fixture and abutment leading to gingival recession. Thus, knowledge about the collum angle of anterior teeth and its variations in sagittal malocclusions would enable precise treatment planning in the field of esthetic dentistry.

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Section: Resultsmentioning

confidence: 99%

Section: Study Characteristicsmentioning

confidence: 99%

Section: Study Characteristicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Collum angle of the anterior teeth: A systematic review and meta‐analysis

Murugaiyan

Srinivasan

Kailasam

2022

J Esthet Restor Dent

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Are morphological and morphometric characteristics of maxillary anterior region and nasopalatine canal related to each other?

Mağat

Akyüz

2022

Oral Radiol

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Cone-Beam Computed Tomography Study of Incisive Canal and Maxillary Central Incisors in Dravidian Population

Selvaraj,

Kumar Subramanian

2024

Cureus

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Introduction: En-masse maxillary anterior retraction is necessary to attain an esthetic profile in Angle's class I bimaxillary dentoalveolar protrusion and Angle's class II division 1 malocclusion. The objective of this study was to evaluate configurational relationships between maxillary incisors and incisive canal in Angle's class I bialveolar protrusion and Angle's class II division 1 malocclusion by cone-beam computed tomography (CBCT). Methods: A total of 108 adult CBCT scans of 54-skeletal class I bialveolar protrusion and 54-skeletal class II division 1 malocclusions were retrospectively analyzed. Angles between palatal plane and axis of maxillary alveolar border (θ1), incisive canal (θ2), and maxillary right central incisor (θ3) were measured in relation to the midsagittal plane. Linear measurements such as incisive canal width (IC-IC), medial inter-root distance (Rm-Rm), posterior inter-root distance (Rp-Rp), anteroposterior distance from Rm to tangent of right central incisor (11 Rm-Cat), and left central incisor (21 Rm-Cat) corresponding to three vertical levels (L1, L2, and L3) were assessed in axial cross-sectional plane. Association among angular measurements was examined by Spearman correlation coefficient analysis. Mann-Whitney U test compared variables of linear measurements at three vertical levels. Results: Estimated distance from incisor root to incisive canal was 5-6 mm in both groups slightly influenced by skeletal class and vertical levels but not gender. Mann-Whitney test demonstrated significant differences between groups at three vertical levels (p<0.05). Only θ2 revealed a significant difference (p<0.05) between malocclusions compared to θ1 and θ3. The angular measurements for both malocclusions were positively correlated (p<0.05). Conclusion: Sagittal root-canal cortical plate distance varied significantly in both malocclusions (5-6 mm). Inter-root distance (Rp-Rp) was greater than incisive canal width (IC-IC) at all three vertical levels indicating a reduced possibility of canal invasion after maximum retraction at posterior levels.

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Correlation between collum angle and lower lip position in different Class II malocclusions - A retrospective cephalometric study

Cited by 3 publications

References 22 publications

Collum angle of the anterior teeth: A systematic review and meta‐analysis

Collum angle of the anterior teeth: A systematic review and meta‐analysis

Are morphological and morphometric characteristics of maxillary anterior region and nasopalatine canal related to each other?

Cone-Beam Computed Tomography Study of Incisive Canal and Maxillary Central Incisors in Dravidian Population

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