scholarly journals Influence of First Premolar Extraction on Mandibular Third Molar Angulation

2009 ◽  
Vol 79 (6) ◽  
pp. 1143-1148 ◽  
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.

scholarly journals Effects of Extraction and Nonextraction Treatment on Third Molar Angulation

2015 ◽  
Vol 5 (1) ◽  
pp. 17-21
Author(s):  
Ajay Sudhakar Nitturkar ◽  
Sachin Doshi ◽  
Girish Karandikar ◽  
Samay Tahilramani ◽  
Bhavisha Gandhi
Keyword(s):  
Third Molar ◽  
Positive Influence ◽  
Occlusal Plane ◽  
Third Molars ◽  
Premolar Extraction ◽  
The Third ◽  
Significant Difference ◽  
The Mean ◽  
Mandibular Third Molars ◽  
The Right

ABSTRACT Objective To compare the angular changes in the developing third molars in both first premolar extraction and nonextraction cases and to determine if premolar extraction results in greater mesial movement of mandibular buccal segment and also causes favorable rotational changes in the third molar tip, which can improve later eruption of the third molars. Materials and Methods Pretreatment (T1) and post-treatment (T2) panoramic radiographs were obtained 31 subjects were taken who had been treated by extraction of all first premolars and for 21 subjects treated with nonextraction theray. Occlusal plane was used to measure and compare the changes in the angles of the developing maxillary and mandibular third molars. Results The mean uprighting of the third molars seen in the extraction group was 8.7° ± 10.29° and 2.97° ± 11.11° on the right side, and 5.14° ± 9.04° and 2.77° ± 12.10° on the left side following treatment (T2 – T1). For the nonextraction group, the mean difference was – 1.52 ± 6.43 and – 6.430 ± 12.21° on the right side, and – 3.90° ± 7.67° and – 5.7° ± 7.23° on the left side. There was a statistically significant difference between the groups (p < 0.001). Conclusion Premolar extractions had a positive influence on the developing third molar angulations. Nonextraction therapy did not have any adverse effects. How to cite this article Nitturkar AS, Doshi S, Krishnan RV, Karandikar G, Tahilramani S, Gandhi B. Effects of Extraction and Nonextraction Treatment on Third Molar Angulation. J Contemp Dent 2015;5(1):17-21.

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

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.

scholarly journals Effect of premolar extraction on mandibular third molar impaction in young adults

2013 ◽  
Vol 83 (4) ◽  
pp. 572-577 ◽  
Author(s):  
Çağrı Türköz ◽  
Çağrı Ulusoy
Keyword(s):  
Therapy Group ◽  
Third Molar ◽  
Third Molars ◽  
Skeletal Class ◽  
Premolar Extraction ◽  
The Third ◽  
Orthodontic Therapy ◽  
Extraction Therapy ◽  
Mandibular Third Molar ◽  
Mandibular Third Molars

ABSTRACT Objective: To test the null hypothesis that orthodontic therapy with or without premolar extraction does not result in any difference in third molar impaction. Materials and Methods: Two groups were formed: 22 patients in one group with first premolar extractions and 22 patients in the other group without extractions. All patients were nongrowing subjects who had normal gonial angles and were skeletal Class I at the beginning of treatment. The available space for third molars, inclination of second and third molars, and angle between the second and third molars were evaluated. Also, the correlation of measured parameters and type of orthodontic therapy with the eruption of third molars was evaluated. Results: Of the third molars, 81.8% were impacted in the nonextraction group and 63.6% were impacted in the extraction group. Impaction of mandibular third molars was significantly correlated to the pretreatment and posttreatment inclination of third molars and the angle between the second and third molars. In the extraction therapy group, the retromolar distance increased significantly with a mean of 1.30 ± 1.25 mm. Conclusions: When the inclination of the third molar is inconvenient, the tooth may remain impacted even if there is enough retromolar space.

scholarly journals Comparing the Effect of Facial Compression Bandage to That of Systemic Dexamethasone on Postsurgical Sequels after Extraction of Impacted Mandibular Third Molars: A Split-mouth Randomized Clinical Trial

2021 ◽  
Vol 9 (D) ◽  
pp. 160-165
Author(s):  
Ibraheem Hamadi ◽  
Nuraldeen Maher Al-Khanati ◽  
Zafin Kara Beit
Keyword(s):  
Third Molar ◽  
Study Groups ◽  
Third Molars ◽  
Dexamethasone Group ◽  
Surgical Extraction ◽  
Significant Difference ◽  
Impacted Mandibular Third Molars ◽  
The Mean ◽  
Mandibular Third Molars ◽  
Present Trial

AIM: The present study aimed to compare the clinical efficiency of facial pressure bandage, to that of intramuscular injection of dexamethasone (8 mg) on postsurgical sequels (swelling, pain, and trismus) of extraction of impacted mandibular third molar. METHODS: The study implemented a randomized split-mouth design. Patients with symmetrical bilateral impacted molars were eligible for the present trial. Sides were randomly assigned to two groups: pressure bandage group and dexamethasone group. The evaluated postsurgical sequels were extraoral swelling, trismus, and pain after 48 h and 7 days. RESULTS: The study included 42 impacted third molars (n = 42) in 21 patients with a mean age of 23.4 years. Most participants were females (66.7%). The mean postoperative swelling rates after 48 h and 7 days in pressure bandage group were found to be comparable to those of dexamethasone group. No significant difference was found in the mean rates of postoperative trismus between study groups after 48 h and 7 days. Differences in mean pain level scores between the pressure bandage group and dexamethasone group were statistically insignificant after 48 h and 7 days. CONCLUSION: The study findings showed that the effect of the pressure bandage was comparable to dexamethasone effect on the postsurgical sequels after surgical extraction of impacted mandibular third molars.

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

2021 ◽  
Vol 15 (4) ◽  
pp. 247-250
Author(s):  
Seerab Husain ◽  
Sri Rengalakshmi
Keyword(s):  
Third Molar ◽  
Third Molars ◽  
Mandibular Incisor ◽  
Positive Correlation ◽  
Irregularity Index ◽  
Mandibular Third Molar ◽  
Group A ◽  
The Mean ◽  
Group B ◽  
Mandibular Third Molars

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.

scholarly journals Radiological age estimation using third molars mineralization in a sample attending orthodontic clinics (A retrospective study)

2020 ◽  
Vol 32 (1) ◽  
pp. 57-64
Author(s):  
Zainab M Kadhom
Keyword(s):  
Age Estimation ◽  
Developmental Stages ◽  
Third Molar ◽  
Practical Method ◽  
Chronological Age ◽  
Third Molars ◽  
Significant Difference ◽  
Mandibular Third Molars ◽  
The Right ◽  
Demirjian Method

Background: The evaluation of the chronological age is a practical method in crime investigation field that assists in identifying individuals to treat them as underage or adult. This study aimed to assess the stages of third molars mineralization in relation to chronological age of Iraqi individuals, determine the gender differences and arches (maxillary/mandibular) differences. Materials and Methods: A total of 300 orthopantomograms of orthodontic patients were collected according to specific criteria and evaluated visually. The developmental stages of maxillary and mandibular third molars were determined according to Demirjian method. The chronological age was recorded according to the particular mineralization stages at which it reached considering genders, sides and jaws. Comparisons were done using paired sample and independent sample t-tests. Results: Results showed that there was no statistically significant difference (P>0.05) between maxillary and mandibular third molars. The maxillary third molars reached earlier than mandibular one in stages F and G. There was no significant difference between the mean ages of males and females at each given developmental stage in the maxillary and mandibular third molars except for the stage D in the maxilla and stages D and E in the mandible. The development of third molar teeth on the right and left sides was similar except for the maxillary arch in males when there was a significant difference in stage C and D and stage E in the mandibular arch. Conclusion: The Demirjian method is an excellent approach for age assessment using Orthopantomogram. All of the differences between the current study and other studies could be because of the difference in the populations who were chosen from different geographical areas. Keywords: Age estimation, Demirjian method, third molar, Orthopantomogram, chronological age.

scholarly journals Mesial Migration Effect on Root Morphology of Mandibular Third Molars

2007 ◽  
Vol 77 (1) ◽  
pp. 73-76 ◽  
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.

scholarly journals Assessment of role of mandibular third molar in lower anterior crowding among orthodontic patients of Kathmandu Nepal

2020 ◽  
Vol 10 (3) ◽  
pp. 21-26
Author(s):  
Bashu Dev Pant ◽  
Anjana Rajbhandari ◽  
Resina Pradhan ◽  
Manju Bajracharya ◽  
Surendra Maharjan ◽  
...  
Keyword(s):  
Third Molar ◽  
Cross Sectional Study ◽  
Third Molars ◽  
Chi Square ◽  
Cross Sectional ◽  
Anterior Crowding ◽  
Mandibular Third Molar ◽  
Significant Difference ◽  
Orthodontic Patients

Introduction: Crowding in mandibular arch increases with increasing age and etiology of crowding is multifactorial in nature. Role of mandibular third molar in lower anterior crowding remains a topic of controvery over a period of century. The objective of this study was to assess whether there is any correlation between presence of mandibular third molar position and lower anterior crowding. Materials and Method: On the basis of third molar position one hundred and six sample of pretreatment orthodontic patients aged between 17 to 38 years were divided into erupted, erupting and agenesis group. The study was conducted in Peoples Dental College and Hospital from January 2020 to March 2020 after obtaining ethical approval from the institutional review committee. This cross-sectional study was done on dental casts and orthopantomogram; brass wire was used for measuring arch length and digital vernier caliper for measuring tooth material with modified segmental arch analysis method. Result: Among 106 samples collected 55 (51.88%) were female and 51(48.11%) were male and the mean age was 21.53 ± 3.91 years, Chi square and ANOVA test was used for Statistical analysis. This study showed no statistically significant differences between third molar position and lower anterior crowding on right (P= 0.68) and left side (P = 0.45). The study also showed that association between the third molar position and lower anterior crowding is more on left side compared to right side. Conclusion: Mandibular third molars have not statistically significant difference in lower anterior crowding so, extraction of third molars for relieving the anterior crowding is not justifiable

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

2017 ◽  
Vol 7 (1) ◽  
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.

scholarly journals Is prophylactic extraction of mandibular third molar indicated? A retrospective study.

2020 ◽  
Author(s):  
Zhouxi Ye ◽  
Wenhao Qian ◽  
Yubo Wu ◽  
Bing Sun ◽  
Zhiyao Li ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Older Patients ◽  
Third Molar ◽  
P Value ◽  
Third Molars ◽  
Impacted Teeth ◽  
Second Molar ◽  
Mandibular Third Molar ◽  
Mandibular Second Molar ◽  
Mandibular Third Molars

Abstract Background To evaluate the associations of impaction patterns of mandibular third molars (M3Ms) with pathologies caused by them. Methods In this study, 262 patients with 432 impacted M3Ms were included. The pathologies include pericoronitis, mandibular second molar (M2M) caries, and M2M distal periodontal pathology. The impaction patterns of M3Ms and the pathologies were examined, and the M2Ms outcomes after the surgeries were evaluated. χ2 test was used to analyze the data and a P value of <0.05 was considered statistically significant. Results Pericoronitis was the major symptom in all patients, whereas the propensities of M2M distal caries and periodontal pathologies increased in older patients. Soft tissue impacted and vertically angulated teeth were more associated with the pericoronitis (p <0.05); Mesio-angular impacted teeth in less deep positions had greater risks of M2Ms distal caries (p <0.05); Mesio-angular and horizontal impacted teeth in relative deep positions were more likely to cause M2Ms distal periodontal pathologies (p <0.05). Conclusions Extractions of soft tissue impacted teeth in vertical angulations should be considered. While removals of mesially and horizontally angulated or bony impacted teeth could be delayed.

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