Correlation between mandibular third molar and mandibular incisor crowding: A retrospective CBCT-based study

Background. Late mandibular incisor crowding is a fairly common phenomenon experienced by growing adults. The etiology of late mandibular incisor crowding, however, is controversial and inconclusive. Hence, this study aimed to investigate the correlation between mandibular third molar and mandibular incisor crowding using Cone-beam computed tomography (CBCT) data. Methods. The study consisted of 40 samples of CBCT images divided into two groups (n=20). Group A comprised CBCT images without third molars, and group B included CBCT images with third molars. The images were observed in the axial view and manually marked to calculate the amount of crowding using Little’s irregularity index. The obtained values were statistically analyzed using Pearson’s correlation test. SPSS 23 was used for statistical analysis. Results. The results showed a positive correlation between the mandibular third molars and mandibular incisor crowding, which was significant (P=0.033). The mean Little’s irregularity index score for groups A and B were 4.26 and 6.799, respectively (P=0.033). Conclusion. The positive correlation between the two groups suggests an association between the mandibular third molars and mandibular incisor crowding.

Download Full-text

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

10.21203/rs.3.rs-538924/v1 ◽

2021 ◽

Author(s):

Martina Žigante ◽

Andrej Pavlic ◽

Luka Morelato ◽

Vaska Vandevska-Radunovic ◽

Stjepan Spalj

Keyword(s):

Third Molar ◽

Third Molars ◽

Mandibular Incisor ◽

Dental Maturation ◽

The Third ◽

Irregularity Index ◽

Mandibular Third Molar ◽

Mandibular Third Molars ◽

Dental Plaster ◽

The Relationship

Abstract OBJECTIVE: To investigate the relationship between the presence and dynamics of mandibular third molar development and the occurrence and amount of late mandibular incisor crowding. MATERIALS AND METHODS: Dental plaster casts and panoramic radiographs of 72 orthodontically untreated subjects from the Nittedal growth study, Norway were analysed. The subjects were recalled for check-up at 12, 15, 18 and 21 years of age. Mandibular incisor crowding was assessed using the Little’s irregularity index and dental maturation of the third molars by the Cameriere’s index.RESULTS: The majority of the subjects (64%) had ≥1mm increase in irregularity; 22% experienced increase of 0.1-0.9mm 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.CONCLUSIONS: Occurrence and amount of mandibular late incisor crowding is not significantly influenced by presence or development dynamics of mandibular third molars.

Download Full-text

Comparison of postoperative complications after impacted mandibular third molar extraction with conventional suturing versus tube drainage.

The Professional Medical Journal ◽

10.29309/tpmj/2020.27.07.4011 ◽

2020 ◽

Vol 27 (07) ◽

pp. 1408-1413

Author(s):

Wajid Ali Rajper ◽

Kashif Ali Channar ◽

Munawar Din Larik ◽

Sajid Ali Majeedano ◽

Aftab Ahmed Soomro ◽

...

Keyword(s):

Postoperative Complications ◽

Third Molar ◽

Mouth Opening ◽

P Value ◽

Third Molars ◽

Mandibular Third Molar ◽

Group A ◽

Impacted Mandibular Third Molars ◽

Group B ◽

Mandibular Third Molars

Objectives: To determine the effectiveness of tube drain compared with conventional suturing on postoperative complications after extraction of impacted mandibular third molars. Study Design: Cross Sectional study (Comparative). Setting: Department of Oral & Maxillofacial Surgery, Institute of Dentistry, LUMHS Jamshoro/Hyderabad. Period: Six months duration from 12-11-2015 to 13-05-2016. Material & Methods: All the patient age from 18 to 45 years irrespective of gender, having mesioangular impacted mandibular third molar were included in the study. Patients were divided into two groups, Group-A and group-B. The severity of pain was recorded by using Visual Analog Scale from 0 no pain to 10 worst pain, degree of swelling was measured by facial size through Amin and Laskin criteria and mouth opening was measured by interincisal distance through ruler. All data was recorded on the 3rd and 7th day by the clinician. Results: Mean age of group A was 31.22+7.21 years, and mean age of group B was 28.34+5.33 years. Male were found slightly more as compared to female. On 3rd day the post-operative pain assessment was almost equal in both groups p-value 0.06 and assessment of post-operative swelling on 3rd day was found with insignificant difference p-value 0.22. Assessment of pain on 7th post-operative day was that the severe pain was found significantly reduced in group B as compared to group A p-value 0.01, swelling was significantly reduced in group B p-value 0.04. While mouth opening was also found significantly more in group B as compared to group A p-value 0.022. Conclusion: After removal of impacted mandibular third molars, incorporating tube drain is very effective as compared to conventional suturing in reducing the facial swelling, trismus and postoperative pain.

Download Full-text

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

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph181910070 ◽

2021 ◽

Vol 18 (19) ◽

pp. 10070

Author(s):

Martina Zigante ◽

Andrej Pavlic ◽

Luka Morelato ◽

Vaska Vandevska-Radunovic ◽

Stjepan Spalj

Keyword(s):

Third Molar ◽

Third Molars ◽

Mandibular Incisor ◽

Dental Maturation ◽

The Third ◽

Irregularity Index ◽

Mandibular Third Molar ◽

Mandibular Third Molars ◽

Dental Plaster ◽

The Relationship

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.

Download Full-text

Influence of First Premolar Extraction on Mandibular Third Molar Angulation

The Angle Orthodontist ◽

10.2319/100708-525r.1 ◽

2009 ◽

Vol 79 (6) ◽

pp. 1143-1148 ◽

Cited By ~ 23

Author(s):

Suruchi Jain ◽

Ashima Valiathan

Keyword(s):

Third Molar ◽

Positive Influence ◽

Reference Plane ◽

Third Molars ◽

Premolar Extraction ◽

Mandibular Third Molar ◽

Significant Difference ◽

The Mean ◽

Mandibular Third Molars ◽

The Right

Abstract Objective: To compare the angular changes in the developing mandibular third molars in both first premolar extraction and nonextraction cases and to determine whether premolar extraction results in a more mesial movement of the mandibular buccal segment and causes favorable rotational changes in the mandibular third molar tilt, which can enhance later eruption of the third molars. Materials and Methods: Pretreatment (T1) and posttreatment (T2) panoramic radiographs were taken of 25 subjects who had been treated by the extraction of all the first premolars and 25 subjects who had been treated with nonextraction. The horizontal reference plane was used to measure and compare the changes in the angles of the developing mandibular third molars. Results: The mean uprighting of the mandibular third molars seen in the extraction group was 8.2 ± 5.4 degrees on the left side and 6.3 ± 6.5 degrees on the right side following treatment (T2 − T1). For the nonextraction group the mean difference was 1.3 ± 4.3 degrees on the left side and 1.7 ± 5.4 degrees on the right side. There was a statistically significant difference between the groups (P = .012 on the right side and P < .001 on the left side). Conclusions: Premolar extractions had a positive influence on the developing third molar angulations. Nonextraction therapy did not have any adverse effects.

Download Full-text

Effect of Intraoral Drainage after Impacted Mandibular Third Molar Extraction on Non-Infectious Postoperative Complications

Journal of Clinical Medicine ◽

10.3390/jcm10204705 ◽

2021 ◽

Vol 10 (20) ◽

pp. 4705

Author(s):

Grzegorz Trybek ◽

Joanna Jarzęcka ◽

Olga Preuss ◽

Aleksandra Jaroń

Keyword(s):

Postoperative Complications ◽

Sodium Alginate ◽

Third Molar ◽

Surgical Removal ◽

Third Molars ◽

Third Molar Extraction ◽

Mandibular Third Molar ◽

Wisdom Teeth ◽

Group B ◽

Mandibular Third Molars

Surgical removal of mandibular third molars is associated with non-infectious postoperative complications, including pain, swelling, trismus. Intraoral drains are noteworthy because of their ease of application, availability, and effectiveness. This study aimed to evaluate the use of latex and calcium–sodium alginate mouth flat drains on the severity of postoperative complications such as pain, trismus, and edema after surgical removal of mandibular third molars. Ninety patients who underwent surgical removal of wisdom teeth were studied. The patients were divided into three groups. Group A—with a latex flat drain, group B—with a sodium–calcium alginate (Kaltostat) flat drain, and group C—with a wound closed with knotted sutures. Patients were assessed for pain on a VAS scale every day from surgery to postoperative day 7. Before the procedure and on postoperative days 1, 2, and 7, the pain level, edema, and trismus were measured, respectively. Intraoral drainage with a flat drain after mandibular third molar removal does not significantly reduce pain, as measured by the VAS scale, or postoperative swelling, as measured by lines between craniometric points. Intraoral drainage with a latex drain after mandibular third molar removal does not significantly reduce trismus, while intraoral drainage with a calcium–sodium alginate drainage bag significantly increases trismus.

Download Full-text

A Comparative Study of Surgical Morbidity Associated with Mandibular Third-Molar Surgery in Young and Aging Populations

The Journal of Contemporary Dental Practice ◽

10.5005/jcdp-11-4-1 ◽

2010 ◽

Vol 11 (4) ◽

pp. 1-8 ◽

Cited By ~ 8

Author(s):

Wasiu L. Adeyemo ◽

Mobolanle O. Ogunlewe ◽

Akinola L. Ladeinde ◽

Olufemi O. Hassan ◽

Olanrewaju A. Taiwo

Keyword(s):

Third Molar ◽

Third Molar Surgery ◽

Third Molars ◽

Surgical Morbidity ◽

Surgical Extraction ◽

Aging Populations ◽

Group A ◽

Mandibular Third Molar Surgery ◽

Group B ◽

Mandibular Third Molars

Abstract Aim Prophylactic surgical extraction of impacted third molars is a common practice throughout the world justified on the presumption that the risk of surgical morbidity increases with increasing age, among other reasons. The aim of this study was to analyze and compare surgical morbidity associated with third-molar extractions in young and aging populations. Methods and Materials A review of records for all patients who underwent the surgical extraction of impacted third molars between April 2001 and June 2006 at the Lagos University Teaching Hospital was carried out. Results A total of 506 patients had surgical extractions of impacted third molars under local anaesthesia during the period of the study. Of these, 470 (92.9 percent) patients were below the age of 40 years (Group A) and 36 (7.1 percent) patients were 40 years of age and older (Group B). No incidences of severe intraoperative complications (excessive bleeding or mandibular fractures) were recorded in either group, but other postoperative complications were reported in 70 (13.8 percent) patients. Of these 70 patients, 65 (92.9 percent) were from Group A and 5 (7.1 percent) were from Group B, and their complications included infected socket, dry socket, paraesthesia, and buccal space abscess. Conclusions No significant difference in postoperative complications following surgical removal of mandibular third molars was found between patients 40 years old and greater and those below age 40. Prophylactic surgical extraction of impacted mandibular third molars, based on the assumption that surgical morbidity increases with age, may not be justifiable. Clinical Significance Age does not predispose patients who had surgical extraction of mandibular third molars above 40 years of age to any additional surgical complications when compared to patients below the age of 40 years receiving comparable treatment. Citation Adeyemo WL, Ogunlewe MO, Ladeinde AL, Hassan OO, Taiwo OA. A Comparative Study of Surgical Morbidity Associated with Mandibular Third-Molar Surgery in Young and Aging Populations. J Contemp Dent Pract [Internet]. 2010 July; 11(4):001-008. Available from: http:// www.thejcdp.com/journal/view/volume11-issue4- adeyemo

Download Full-text

Use of Collagen Membrane in the Treatment of Periodontal Defects Distal to Mandibular Second Molars Following Surgical Removal of Impacted Mandibular Third Molars: A Comparative Clinical Study

Biology ◽

10.3390/biology10121348 ◽

2021 ◽

Vol 10 (12) ◽

pp. 1348

Author(s):

C. Burnice Nalina Kumari ◽

Thiagarajan Ramakrishnan ◽

Pradeep Devadoss ◽

Rajaram Vijayalakshmi ◽

Khalid J. Alzahrani ◽

...

Keyword(s):

Alveolar Bone ◽

Third Molar ◽

Collagen Membrane ◽

Surgical Removal ◽

Third Molars ◽

Membrane Barrier ◽

Group A ◽

Impacted Mandibular Third Molars ◽

Group B ◽

Mandibular Third Molars

The study aims to assess the efficacy of using collagen membrane in the treatment of distal periodontal defects of mandibular second molars following the removal of mesioangularly or horizontally impacted mandibular third molars surgically. Forty sites in twenty patients with bilaterally impacted mandibular third molars (mesioangular or horizontal) were considered for the study. In 20 test sites (Group A), after surgical removal of the mandibular third molar, a resorbable collagen membrane barrier was placed on the distal aspect of the mandibular second molar to cover the post-surgical bone defect. In the other control 20 sites (Group B), the same surgical procedure was repeated without placing any membrane barrier. The clinical parameters recorded were Oral Hygiene Index Simplified (OHI-S), Probing pocket depth (PPD), Clinical attachment level (CAL), and radiographic assessment of alveolar bone level (ABL). OHI-S score of most of the patients was observed to be satisfactory. Group A was observed to achieve a statistically significant reduction in PPD, CAL, and ABL gain compared to Group B. The improvements indicated that the use of collagen membrane facilitates early wound stabilization and promotes primary closure of the defect. This recovery is achieved through its unique property to assist fibrinogenesis over osteoconduction. Further longitudinal studies are needed to confirm the present findings.

Download Full-text

Mesial Migration Effect on Root Morphology of Mandibular Third Molars

The Angle Orthodontist ◽

10.2319/021006-53r.1 ◽

2007 ◽

Vol 77 (1) ◽

pp. 73-76 ◽

Cited By ~ 2

Author(s):

A. Altuğ Bıçakçı ◽

Oral Sökücü ◽

Hasan Babacan ◽

H. Hüseyin Köşger

Keyword(s):

Third Molar ◽

Root Apex ◽

Central Line ◽

Occlusal Plane ◽

Third Molars ◽

Migration Effect ◽

Mandibular Third Molar ◽

Root Curvature ◽

History Of ◽

Mandibular Third Molars

Abstract Objective: To test the hypothesis that there is a relationship between forward mandibular third molar migration and root curvature of the mandibular third molars. Materials and Methods: The study is comprised of 64 patients who had a history of unilateral mandibular first molar extraction before 16 years of age with no other missing teeth or prosthetic restorations in the mandible. The extraction space was fully or partly closed. The mean remaining space was 1.1 ± 0.41 mm. The root angles for the mesial and distal roots of the mandibular third molars were measured on the panoramic radiographs by calculating the differences between the angle formed by the long axis drawn perpendicular to the occlusal plane of the crown of mandibular third molar and the central line of the lower one ninth of the root through the root apex. The differences between the extracted and nonextracted sides for mesial and distal roots were analyzed using a paired sample t-test. Results: Both mesial and distal roots were approximately 8° more vertical on the extraction sides than on the nonextraction sides. The differences were statistically significant. Conclusion: Mesial tooth migration of mandibular third molars reduces the amount of root curvature developing on this tooth.

Download Full-text

The Frequency of Mandibular Third Molar Impaction in Different Types of Vertical Skeletal Faces

Journal of The Pakistan Dental Association ◽

10.25301/jpda.302.118 ◽

2021 ◽

Vol 30 (02) ◽

pp. 118-123

Author(s):

Sana Viqar ◽

◽

Sadia Rizwan ◽

Syed Shah Faisal ◽

Syed Sheeraz Hussain

Keyword(s):

Third Molar ◽

Third Molars ◽

Skeletal Malocclusion ◽

Mandibular Third Molar ◽

Lateral Cephalograms ◽

Significant Difference ◽

Pre Treatment ◽

Mandibular Third Molars ◽

Facial Types ◽

Third Molar Eruption

OBJECTIVE: To determine the frequency of mandibular third molar impaction in different vertical skeletal facial types. METHODOLOGY: Data was collected using pre-treatment records including orthodontic files, pre-treatment lateral cephalograms and OPGs of 90 orthodontic patients. Patients from both genders were included. The age group of selected patients was 18-30 years. Vertical skeletal malocclusion was measured using facial angle and mandibular plane angle on cephalogram to group the subjects into Mesiofacial, Brachyfacial and Dolichofacial patients. Third molar eruption status was assessed using OPG. RESULTS: Results showed that erupted third molars were mostly found in brachyfacial patients. Among 32 erupted mandibular third molars, 16 belong to brachyfacial, 11 belonged to mesiofacial and 5 belonged to dolichofacial group. Complete impaction of mandibular third molar was most common among dolichofacial patients. Among 29 completely impacted mandibular third molars, 14 belong to dolichofacial, 9 belonged to mesiofacial and 6 belonged to brachyfacial group. No significant difference was found for partially impacted third molars among the three groups of facial types. There was higher prevalence of mandibular third molar impaction in females as compared to males. CONCLUSION: Frequency of third molar impaction was found to be highest in dolichofacial patients and lowest in brachyfacial patients due to forward direction of mandibular growth contributing to greater resorption of the anterior border of ramus and the additional space required for third molar eruption.

Download Full-text

Calcifying cystic odontogenic tumor in radiologically normal dental follicular space of mandibular third molars: report of two cases

Clinics and Practice ◽

10.4081/cp.2017.933 ◽

2017 ◽

Vol 7 (1) ◽

Cited By ~ 3

Author(s):

Gargi S. Sarode ◽

Sachin C. Sarode ◽

Ghevaram Prajapati ◽

Mahesh Maralingannavar ◽

Shankargouda Patil

Keyword(s):

Cell Transformation ◽

Histopathological Examination ◽

Third Molar ◽

Odontogenic Tumor ◽

Third Molars ◽

Radiographic Evidence ◽

Odontogenic Epithelium ◽

Mandibular Third Molar ◽

One Year ◽

Mandibular Third Molars

Two cases of calcifying cystic odontogenic tumor (CCOT) of the dental follicle in an impacted third molar without clinical and radiological evidence are reported during routine histopathological examination. In both the cases left mandibular third molar was mesioangularly impacted with pericoronal radiolucency of less than 2.5 mm, which was not indicative of any pathology. As a routine protocol (which is not practiced widely) of our institution, dental follicles associated with extracted molars were sent for histopathological examination. Histopathological features were consistent with CCOT with pathognomonic ghost cell transformation of odontogenic epithelium. The patients were followed for one year with no recurrence. This paper emphasizes the importance of routine histopathological examination of dental follicles associated with asymptomatic impacted teeth without any clinical or radiographic evidence of follicular lesion.

Download Full-text