Relationship of Mandibular Third Molar to Mandibular Anterior Crowding

Sood, Arvind; Bhullar, Mandeep; Mittal, Sanjay; Aggarwal, Isha; Singla, Divya; Sharma, Abhishek

doi:10.1055/s-0039-1677775

Cited by 3 publications

(2 citation statements)

References 37 publications

(32 reference statements)

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“…Proposed etiological factors include differential growth of the jaws, functional and parafunctional pressure of the soft tissues, muscular imbalance and distribution of the anterior component of the occlusal force [ 1 , 2 ]. Many studies have attempted to clarify and evaluate the third molars and incisor crowding interrelationship [ 3 , 4 , 5 , 6 , 7 , 8 ]. They focused on third molar angulations, position, space, or their extraction, but none analyzed their maturation dynamics.…”

Section: Introductionmentioning

confidence: 99%

“…Some authors attributed incisor crowding to the mesial pressure exerted by the mandibular third molar [ 4 ], on the other hand, others do not consider this pressure capable of causing anterior crowding [ 3 ]. Some research findings report that no strong relationship exists between the third molar eruption level, space, and angulations to mandibular anterior crowding [ 6 ]. It seems that the only connection between crowding and eruption of the third molars is the concurrent occurrence of the two phenomena [ 30 ].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Presence and Maturation Dynamics of Mandibular Third Molars and Their Influence on Late Mandibular Incisor Crowding: A Longitudinal Study

Žigante

Pavlić

Morelato

et al. 2021

IJERPH

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The objective of this study was to investigate the relationship between the absence, presence and dynamics of mandibular third molar development and the occurrence and amount of late mandibular incisor crowding. Dental plaster casts and panoramic radiographs of 72 orthodontically untreated subjects from the Nittedal growth study, Norway were analyzed. The subjects were recalled for a checkup at 12, 15, 18 and 21 years of age. Mandibular incisor crowding was assessed using Little’s irregularity index and dental maturation of the third molars by the Cameriere’s index. The majority of the subjects (64%) had ≥1 mm increase in irregularity; 22% experienced an increase of 0.1–0.9 mm and 14% had unchanged or decreased irregularity. Incisor irregularity increased with age, regardless of absence or presence of third molars. The amount of change in incisor irregularity from 12 to 21 years did not differ significantly between subjects with hypodontia of third molars, extraction and those with third molars present. No differences were observed between erupted, unerupted or impacted third molars. No correlation was found between the amount of change in irregularity and maturation of the third molars. In conclusion, occurrence and amount of mandibular late incisor crowding is not significantly influenced by the presence of mandibular third molars or their development dynamics.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Presence and Maturation Dynamics of Mandibular Third Molars and Their Influence on Late Mandibular Incisor Crowding: A Longitudinal Study

Žigante

Pavlić

Morelato

et al. 2021

IJERPH

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Three-dimensional relationship between the degree of bilateral impacted mandibular third molars angulation and the mandibular dental arch parameters: a cross-sectional comparative study

et al. 2023

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Objectives: The purpose of this study was to three-dimensionally evaluate the relationship between the degree of bilateral impacted mandibular third molars (IM3M) angulation and the mandibular dental arch parameters in normal skeletal and dental malocclusion patients.Materials and Methods: In this retrospective cross-sectional comparative study, 120 adult subjects' cone beam computed tomography (CBCT) images were three-dimensionally analyzed. The sample was divided into four groups according to degree of M3M buccolingual angulation (BL°); Group A <12° on the center of the ridge (N=30), Group B 12-24° off-center of the ridge (N=40), Group C >24° off center of the ridge (N=30), and Group D (control group with normal erupted bilateral M3M).The study subjects were further also divided into three groups according to IM3M mesiodistal angulation (MD°); Group 1 from10° to 45°, Group 2> 45° and Group 3 (control group with normal erupted bilateral M3M, 0 -10°). Comparison within and between groups were performed using One-way ANOVA followed by Tukey's post hoc test, respectively. Correlation between IM3M, BL and MD angulation and mandibular arch parameter was calculated using Pearson's correlation coe cient.Results: Statistically signi cant differences (P < .001) were founded between the IM3M BL° and anterior teeth inclination, arch length (AL) and inter second molar width (inter 2 nd MW) as well as between the IM3M MD° with anterior crowding and the arch length (P < .001). Signi cant positive correlation was founded between IM3M BL° and anterior teeth inclination, and between IM3M MD° and anterior teeth crowding and inter 2nd MW. Signi cant negative correlation was observed between IM3M BL° and inter 1 st MW and 2 nd MW. Conclusion:The degree of buccolingual and mesiodistal angulation of the impacted mandibular third molars was associated with mandibular dentoalveolar changes. The increase in buccolingual angulation is associated with increase of anterior teeth inclination, and the decrease of 1 st and 2 nd inter-molars width. The increase in mesiodistal angulations was associated with increase in anterior teeth crowding and 2 nd inter-molars width.Clinical relevance: Assessment of the relationship between the impacted mandibular third molars and the degree of arch discrepancy, and the position of mandibular incisors in the three planes of space might help in the decision-making process for extraction of the impacted third molars in adult patients.

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Correlation of Lower Third Molar Angulation and Posterior Space Discrepancy with Mandibular Anterior Crowding using 3d Intra Oral Scanner

Iftikhar¹,

Jahanzeb

2021

J Gandhara Med Dent Sci

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OBJECTIVES: To objectively determine the correlation of lower third molar angulation and posterior space discrepancy with mandibular anterior crowding digitally using intraoral scanner. METHODOLOGY: Cross sectional analytical study conducted at Rehman College of Dentistry (RCD) Peshawar from15th November 2020 till 15th December 2020. Lower third molar angulation and posterior space discrepancy were measured by IC 3.1 measure software, using digital Orthopantomograms (OPG). Digitally scanned models by (CS 3600 intraoral scanner) were analyzed using (CS 3600 3D software). Sample was divided into Control (N=30; perfect alignment), Experimental (N=30; crowding >1mm) groups, based on Little’s Irregularity Index. Both lower third molar angulation and posterior space discrepancy (Ganss Ratio) were correlated with lower anterior crowding using Pearson’s Correlation. To determine any difference between two groups independent t-test was used. RESULTS: Statistically insignificant difference and a weak correlation were found for Ganss ratio and third molar angulation in both control and experimental groups. CONCLUSION: Third molar angulation and the retro molar space has no direct effect on the lower anterior crowding.

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Relationship of Mandibular Third Molar to Mandibular Anterior Crowding

Cited by 3 publications

References 37 publications

Presence and Maturation Dynamics of Mandibular Third Molars and Their Influence on Late Mandibular Incisor Crowding: A Longitudinal Study

Presence and Maturation Dynamics of Mandibular Third Molars and Their Influence on Late Mandibular Incisor Crowding: A Longitudinal Study

Three-dimensional relationship between the degree of bilateral impacted mandibular third molars angulation and the mandibular dental arch parameters: a cross-sectional comparative study

Correlation of Lower Third Molar Angulation and Posterior Space Discrepancy with Mandibular Anterior Crowding using 3d Intra Oral Scanner

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