Buccolingual root dimension of permanent mandibular canines as a complementary estimator of sex: a pilot study

Objective: To evaluate the potential of the buccolingual dimension of the permanent mandibular canine roots as a sex estimator, using midsagittal cone-beam computed tomography images. Methods: In this retrospective study, 58 Portuguese patients (27 female and 31 male) aged 18-60 years were assessed. The maximum buccolingual dimension of the cervical root was measured in the midsagittal plane through cone-beam computed tomography images. The Bland-Altman method was applied for the reliability analysis, and a receiver operating characteristics (ROC) curve was obtained for accuracy analysis. Results: The buccolingual root dimension on the mandibular canine showed statistically significant differences between sexes (t56 df = 4.871; p<0.0005). The optimal cut-off to differentiate males from females was 6.64 mm. The area under the curve (AUC) was 83.5% (p<0.0005). An overall accuracy of 79% was obtained. The percentage of males correctly estimated was 77.4%, compared to 81.5% of females. Conclusions: Our data suggest that canines’ buccolingual root dimension can serve as a complementary tool for sex estimation in a forensic context.

Differences in Correlation Values in Sex Determination based on Ridge Density of Hypothenar, External Ear Anthropometric and Canine Index

Hypothenar region is an area that is often contacts with surfaces during activities, and the ear is proven to be more consistent than face identification in passive biometrics. While, the teeth are hardest part in the human body which covered inside the oral cavity. These 3 parts of the body have a great role forensic identification especially in determining sex. The aim of this study is to know differences in correlation values in sex determination based on ridge density of hypothenar region of the palm, external ear anthropometric and canine index. This was a cross sectional study with observational analytic design, include 500 medical students in Kariadi Hospital Semarang Central Java Indonesia, age 21 - 26 years old, who are included in inclusion criteria, male (n = 250), female (n = 250). Ridge density is measured by calculating the average number of hypothenar palm ridge on the side of the top, middle and bottom; each area is 5×5 mm2 in measurement. External ear anthrophometric consists ear length, ear breadth, base auricular, lobe length and lobe width. Canine index is calculated by dividing mesiodistal width and intercanine distance in 4 regions. Spearman correlation test between ridge density of hypothenar region palm prints, external ear anthropometric, mandibular canine index and sex shows significant correlation with p-value = 0.000. There is no significant difference between maxillary canine index and sex (right maxillary p-value = 0.112 and left maxillary p-value = 0.082). There are differences in correlation values in sex determination based on ridge density of hypothenar region palm prints, external ear anthropometric and mandibular canine index. Ridge density of hypothenar region palm prints and ear length are show strong correlation in sex determination.

Traumatic Bone Cyst in the Mandibular Symphysis : Case Reports

Traumatic bone cyst (TBC) is an asymptomatic lesion seen most in adolescents. TBC is found incidentally on routine panoramic examinations and appears as a relatively well-demarcated unilocular radiolucency with scalloped margins. Histological examination reveals a vacant cavity of cancellous bone usually unlined or very occasionally lined with a thin connective tissue layer. The lack of lining epithelial membrane is common histological feature. The most affected site is between the mandibular canine and third molar. The involvement of the mandibular symphysis is rare. The etiopathogenesis of the TBC is unclear. TBC is treated with surgical exploration and curettage; new bone is formed in place of the lesion within 6 - 12 months of surgery. Diagnosis of TBC prior to surgical intervention has limitations in most of the cases. Both of our patients were diagnosed through radiological examination and biopsy. Neither patient had a history of trauma. After surgery, the panoramic radiograph and CBCT were used to confirm bone healing.

An unusual complication after augmentation genioplasty: odontogenic infection requiring implant removal

Augmentation genioplasty is a common surgical procedure with extremely low infection rates. We present the case of a healthy middle-aged woman who experienced years of chronic infection after chin implantation due to a fractured mandibular canine root, which is exceedingly rare. Awareness of this potential complication will reduce patient morbidity.

Space Closure Rate in Mandibular Canine Retraction by Elastomeric Power Chain: A Clinical Trial

Background : On a daily basis, orthodontic patients present with malocclusions and orofacial imbalance. Often times, teeth must be extracted in order to obtain proper esthetics, occlusion, and stability as well as extraction of teeth is often a need to close residual space, after the initial decrowding and aligning. Pre adjusted fixed orthodontic appliances commonly utilize sliding mechanics for space closure with different types of force delivery systems. A variety of materials have been used as force delivery systems to close spaces between teeth as in the case of canine retraction after the extraction of premolars. Elastomeric auxiliaries are relatively consistent in producing tooth movements. The purpose of the study to evaluate the rate of mandibular canine retraction by elastomeric power chain. Materials and methods : This obervational study was designed as split mouth study. A total number of 20 patients (40 quadrants),who required canine retraction into first premolar extraction sites as part of their orthodontic treatment in the Department of Orthodontics, BSMMU as study population. The quadrants were affixed by elastomeric power chain (Dentaurum) with 200gm force measured by Correx Tension Gauge. Space closure was measured by means of direct measurement from the mesial surface of mesial wing of the 2nd premolar bracket and the distal surface of distal wing of the canine bracket with digital Vernier Calipers. Results: Mean space closer rate in mandibular canine retraction was 0.99 ± 0.08 mm/month in elastomeric power chain method with p value<0.001. Conclusion : This study revealed that space closer rate in mandibular canine retraction was 0.99 ± 0.08 mm/month by elastomeric power chain. Chatt Maa Shi Hosp Med Coll J; Vol.20 (2); July 2021; Page 28-31

Orthodontic Treatment for Linguoversion of Mandibular Canine Teeth Using Crown Extensions

This step-by-step article describes the process to apply and remove crown extensions for the treatment of linguoversion of the mandibular canine teeth. The process offered in this article provides a guideline for practitioners to become more comfortable with using crown extensions to treat a common malocclusion seen in companion animals.

Space Closure Rate in Mandibular Canine Retraction by Ni-Ti Closed Coil Spring: A Clinical Trial

Introduction: In Majority of patients seeking orthodontic treatment, teeth must be extracted in order to obtain proper esthetics, occlusion, and stability as well as extraction of teeth is often a need to close residual space, after the initial decrowding and aligning. Pre adjusted fixed orthodontic appliances commonly utilize sliding mechanics for space closure with different types of force delivery systems. A variety of materials have been used as force delivery systems to close spaces between teeth as in the case of canine retraction after the extraction of premolars. Among all sliding or frictionless methods of canine retraction, super-elastic nickel titanium coil spring has a particular property in producing light continuous force at a long range of action, compared with previously available materials. Nickel-titanium closed coil spring, with a continuous action, might have some advantages in fixed appliance space closure mechanics. Materials and Methods: Over the period of one year from May 2015 to April 2016, this clinical trial was carried out and A total number of 20 patients (40 quadrants), who required canine retraction into first premolar extraction sites as part of their orthodontic treatment in the Department of Orthodontics of BSMMU selected as study population. The quadrants were affixed by nickel titanium closed coil springs (medium force, Ni-Ti extension spring, Ormco) with 200gm force measured by Correx Tension Gauge. Space closure was measured by means of direct measurement from the mesial surface of mesial wing of the 2nd premolar bracket and the distal surface of distal wing of the canine bracket with digital Vernier Calipers. Results: Mean space closer rate in mandibular canine retraction was 1.07 ± 0.12 mm/month by nickel-titanium (Ni-Ti) closed coil spring method with p value<0.001. Conclusion: This study revealed that space closer rate in mandibular canine retraction by nickel-titanium (Ni-Ti) closed coil spring is 1.07 ± 0.12 mm/month. Medicine Today 2021 Vol.33(2): 90-93