Comparison of Collum Angle of Maxillary Central Incisors in Different Incisor Relationships

Khalid, Zahra; Iqbal, Kashif; Khalid, Sana; Riaz, Aima; Jan, Abdullah

doi:10.29271/jcpsp.2020.05.471

Cited by 5 publications

(1 citation statement)

References 1 publication

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“…7,9,16 Before CBCT (Cone beam computed tomography) was invented lateral cephalometry was the only way to investigate labial surface angle and collum. 4,17,18 CA of maxillary central incisor in sagittal malocclusion has been studied previously in western population 19,10,20,3,6 as well in Pakistani population 7,24 but vertical skeletal malocclusion using lateral cephalogram has not been studied, which was the reason we chose to explore this aspect.…”

Section: Discussionmentioning

confidence: 99%

Comparison of Collum Angle of Maxillary Central Incisor in High Angle and Low Angle Patients

Behroz¹,

Ahmed²,

Rafi³

et al. 2021

J Pak Dent Assoc

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OBJECTIVE: This study aims to determine the mean collum angle of maxillary central incisor and to compare it between high angle and low angle patients undergoing orthodontic treatment. METHODOLOGY: This cross-sectional, observational study was conducted using lateral cephalometric radiographs of 61 class II division 1 patients (comprised 32 males, 29 females, age range 13 to 30 years) from the record files of patients inducted for Orthodontic management from June 2020 till August 2020 at the Department of Orthodontics, Sindh Institute of Oral Health Science, Jinnah Sindh Medical University, Karachi, Pakistan. The sample was divided on the basis of Vertical Analysis (angulation of mandibular plane) into high and low angle cases. Collum angle was measured using the angulation of the Maxillary Central Incisor (MCI). Student t-test was used to compare the mean difference of the collum angle between skeletal vertical malocclusions. RESULTS: Mean value of the collum angle for high angle (Vertical Growth pattern) cases were mean ± standard deviation (4.35°±1.49°) while for low angle groups (Horizontal Growth pattern) were (2.41°±1.60°). CONCLUSION: There Collum angle of permanent maxillary central incisors differ significantly (p<0.001) among high angle and Low angle malocclusions cases (n=61) and showed pronounced axial bending in Class II division 1 incisors with high angle (4.35° ± 1.49°) as compared to low angle malocclusion (2.41° ± 1.60°). KEYWORDS: Collum Angle, Maxillary Central Incisor, Orthodontic Treatment, High Angle, Low Angle.

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Section: Discussionmentioning

confidence: 99%

Comparison of Collum Angle of Maxillary Central Incisor in High Angle and Low Angle Patients

Behroz¹,

Ahmed²,

Rafi³

et al. 2021

J Pak Dent Assoc

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Evaluation of anterior teeth crown-root morphology and alveolar bone structure in patients with closed deep overbite using cone beam computed tomography

Tang,

Han,

Wang

et al. 2024

Sci Rep

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This retrospective study used cone-beam computed tomography to investigated the crown-root morphology and alveolar bone structure in incisors region in subjects with closed deep overbite and comparison the difference between gender and age. The CBCT images for 40 subjects (group C) with Angle II division 2 were selected from patients of the HeFei Stomatological Hospital from November 2023 to March 2024.20 individual normal occlusion subjects (group A),20 patients with Angle II division 1(group B) were included. The crown-root ratio of the maxillary and mandibular anterior teeth, crown-root angle and alveolar bone structure were measured on the CBCT images, the data were statistically analyzed. In addition to mandibular lateral incisor, the crown-root ratio of maxillary and mandibular anterior teeth in the Class II division 2 group was higher than that in the individual normal occlusion group and the Class II division 1 ( P < 0. 05). The crown-root angle of maxillary anterior teeth in the Class II division 2 group was smaller than that in the individual normal occlusion group and the Class II division 1 ( P < 0. 05). The alveolar bone thickness of the maxillary central incisor was comparatively smaller, while the alveolar bone height was relatively higher in the Class II division 2 group. Age and gender were associated with change in root lengths and crown-root angle for the Class II division 2 group ( P < 0. 05). Patients with closed deep overbite malocclusion exhibit a significant difference compared to the controls for most measurements. The patients presenting with Class II division 2 malocclusion exhibit excessive inward positioning of the anterior teeth, resulting in evident crown-root angle, a large crown-root ratio, and minimal labial alveolar bone. In order to keep the tooth movement within the safe range of alveolar bone movement, it is necessary to strictly control the torque and use appropriate orthodontic force to reduce the risk of bone fenestration, bone dehiscence, gingival recession and root resorption. Supplementary Information The online version contains supplementary material available at 10.1038/s41598-024-75642-4.

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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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Comparison of Collum Angle of Maxillary Central Incisors in Different Incisor Relationships

Abstract: Objective: To compare the collum angle of maxillary central incisors in patients with different incisor relationships.

Cited by 5 publications

References 1 publication

Comparison of Collum Angle of Maxillary Central Incisor in High Angle and Low Angle Patients

Comparison of Collum Angle of Maxillary Central Incisor in High Angle and Low Angle Patients

Evaluation of anterior teeth crown-root morphology and alveolar bone structure in patients with closed deep overbite using cone beam computed tomography

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

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