scholarly journals Evaluation of Retromolar Canals using Cone Beam Computer Tomography/ Avaliação do canal retromolar por meio de tomografia computadorizada de feixe cônico

2021 ◽  
Vol 4 (4) ◽  
pp. 15952-15961
Author(s):  
Ana Paula Tulio Manfron ◽  
Alessandra S. Ditzel ◽  
Flávia N.G.K. Fontão ◽  
Luciana R. Azevedo Alanis
Keyword(s):  
Cone Beam ◽  
Clinical Implications ◽  
Retromolar Foramen ◽  
Male Patients ◽  
The Mean ◽  
Research And Education ◽  
The Right ◽  
Cone Beam Computer Tomography ◽  
Retromolar Canal

The aim of this study was to evaluate the prevalence, location and clinical implications related to the presence of the retromolar canal (RMC) on cone beam computed tomography(CBCT). CBCT images of patients from Latin America Institute for Dental Research and Education - Curitiba,Pr,Brazil, was performed from June/2008 to February/2013. The interpretation was performed by a calibrated examiner, according to the criterias: presence, location and classification of the RMC variation, as well as, measurements of horizontal distances of the RMC in relation to the buccal bone cortical and diameter of these canals. A total of 751 CBCT images were interpreted: 486(64.7%) from females and 265 (35.3%) from male patients, with mean age of 54.57 (±13.23) years. The presence of RMC was observed in 58 (7.7%) patients, 23 men and 35 women. A total of 1502 hemi- mandibles were analyzed. The RMC was identified in 69(4.6%) hemi-mandibles, 44(63.8%) from females and 25(36.2%) from males. Thirty (42.8%) RMC were observed on the right side and 40 (57.2%) on the left one. The type B1 (n=33; 47.1%) was the most common, followed by the type A1 (n=18;25.7%). The mean diameter of RMC was 0.97mm (±0.44), and the mean distance between retromolar foramen and the buccal cortical of the mandible was 4.12mm (±1.35). There were no significant differences between the distances and genders, and distances and sides (p 0.05). The prevalence of RMC was 7.7% in the studied sample; they were predominantly unilateral and showed to be type B1.

Role of laparoscopic in diagnosis and treatment of undescended testis in children at Viet Duc Hospital

2018 ◽  
Vol 8 (4) ◽  
Author(s):  
Viet Hoa Nguyen
Keyword(s):  
Laparoscopic Surgery ◽  
Undescended Testis ◽  
Correct Diagnosis ◽  
Diagnosis And Treatment ◽  
Highly Sensitive ◽  
The Mean ◽  
The Right ◽  
Time Of Operation

Abstract Introduction: Evaluating the role of laparoscopic for diagnosis and treatment of undescended testis in children. Material and Methods: Restrospective study, between 6/ 2014 and 6/2017. All the patients are aged from 1 to 16 years with undescended testis underwent laparoscopic surgery for diagnosis and treatment in Deparment of pediatric surgery – Viet Duc hospital enrolled. Results: Of 95 patiens in total had 106 undescended testis diagnosed and treated by laparoscopy. The mean age of patients was 7,5 ± 3,8 years. 44,2% undescended were on the left side, 44,2% were on the right and 11,6% were undescended bilateral. The correct diagnosis by ultrasound accounted in 79,4%. The locations of testis diagnosed by laparoscopic are : intra abdomen in 45,3%, deep inguinal orifice in 16,9%, extra inguinal orifice in 26,4%, no testicle found in 11,4%. The mean time of operation were 67,33± 28,01 pht. Scrotal positions were achieved 74,5%, remove atrophic testis accounted in 7,6%. Stephen- Flowler technique including step I were in 4,7%, step II in 1,9%. The outcome evaluated by testicular positions following 3 months after operation are : good in 79,2%, moderate 13,2%, poor in 7,6%; By classification of Aubert are : good in 81,1%, moderate in 11,3% and poor in 7,6 %. Conclusion: Laparoscopic surgery is not only a highly sensitive diagnostic method to find accurately the location and size of the testes, but also the most effective method to treat impalpable undescended testes.

Kienböck’s Disease in Women

1999 ◽  
Vol 24 (5) ◽  
pp. 596-597 ◽  
Author(s):  
Y. TANIGUCHI ◽  
T. TAMAKI
Keyword(s):  
Wrist Joint ◽  
Age At Onset ◽  
Joint Involvement ◽  
Female Group ◽  
Kienböck’S Disease ◽  
Kienböck's Disease ◽  
Male Patients ◽  
The Mean ◽  
The Right ◽  
Kienbock’S Disease

We examined 133 patients with Kienböck’s disease, five of whom had bilateral disease. There were 47 women and 86 men. The mean age of patients was 42.7 years (range, 14–80 years). The frequencies of involvement of the right and left sides were approximately equal for women, but male patients tended to have right wrist joint involvement. The side of the affected wrist in the female group differed significantly from that in the male group. The age at onset for women was significantly higher than that for men. The percentage of manual workers was significantly lower among women than among men. The characteristics of Kienböck’s disease in women differed from those in men and those previously reported for this disease. These findings suggest that the pathogenesis of Kienböck’s disease in women differs from that in men.

scholarly journals Study of the pterigidal canal (vidian canal) through images of cone beam computer tomography.

2020 ◽  
Vol 23 (3) ◽  
Author(s):  
Fernanda Fritoli Marcondes Santana ◽  
Marcos Paulo Motta Silveira ◽  
Pedro Jacy Santos Diamantino ◽  
Karolina Aparecida Castilho Fardim ◽  
Luiz Roberto Coutinho Manhães Júnior ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Close Contact ◽  
Close Relation ◽  
Cone Beam ◽  
Inferior Wall ◽  
Mean Values ◽  
Vidian Canal ◽  
Foramen Rotundum ◽  
The Mean ◽  
The Right

Objective: The aim of this study was to evaluate the pterygoid canal (PC) by Cone Beam Computed Tomography (CBCT), establishing its configuration and proximity with anatomical structures. Material and Methods: We evaluated 398 CBCT exams, all from a public University radiology clinic archive. Four parameters were evaluated: single or double PC, distance between PC and the inferior part of the sphenoid sinus (SS), ratio of PC and SS and the distance between the PC and the foramen rotundum. Results: It was observed that most of the PC of the sample presented simple morphology, the most frequent type of relationship between the PC and the SS on both sides was the close contact with the wall. Among the cases that there were some distances between the PC and the inferior wall of the SS, the mean of this distance did not exceed 3.20 mm, being the left side (3.03 mm) slightly closer than the right (3.20 mm). Finally, the distances between the PC and the corresponding Foramen Rotundum are presented with mean values of 5.87 mm for the right side and 6.31 mm for the left side. Conclusion: CBCT examination is of paramount importance for PC identification; once in the studied sample, the mean values found evidence the close relation between the PC and the SS.KeywordsCone beam computed tomography; Endonasal approach; Vidian canal.

scholarly journals FUNCTIONAL OUTCOME BY EVALUATION OF DASH SCORE ON DROP HAND PATIENT TREATED WITH JONES’ TENDON TRANSFER: A RETROSPECTIVE STUDY

2021 ◽  
Vol 10 (2) ◽  
pp. 39
Author(s):  
Tito Sumarwoto ◽  
Seti Aji Hadinoto ◽  
Adhitya Indra Pradhana
Keyword(s):  
Functional Outcome ◽  
Radial Nerve ◽  
Tendon Transfer ◽  
Nerve Repair ◽  
Average Score ◽  
Radial Nerve Palsy ◽  
Dash Score ◽  
Male Patients ◽  
The Mean ◽  
The Right

Background: Drop hands due to radial nerve injuries cause functional and structural disabilities. Tendon transfer became the last option when nerve repair could not give patients restoration. The most popular method was Jones' Tendon transfer to restore wrist dorsiflexion, extending the thumb and the fingers. The Disabilities of Arm, Shoulder, and Hand (DASH) score measures functional outcomes in patients with upper extremities injuries. This study was to acknowledge the functional outcome and evaluate the DASH score in drop hand patients who undergone surgery by Jones’ Tendon Transfer in Prof. Dr. R. Soeharso Orthopaedic Hospital Surakarta from January 2014 to June 2016.Methods: The collected data from the medical record was evaluated based on functional outcome and DASH score. Eleven patients were included, ten male patients (90.9%) and one female patient (9.1%). The mean age of patients was 27.4 years old, with the most frequently injured arm was the right arm, counted to be eight patients (72.7%), and the left arm was three patients (27.3%).Results: The result from the evaluation of the DASH score indicated ten patients (90.9%) were minimal disability, and one patient (9.1%) was moderate disability. The average score was 12.48, which means that most patients could cope with most daily living activities post-operatively.Conclusions: In conclusion, surgery for drop hand due to radial nerve palsy by Jones’ Tendon Transfer gave a satisfactory functional outcome based on the DASH score.

scholarly journals Cone-beam computed tomography evaluation of bifid mandibular canal in a Turkish population

2018 ◽  
Vol 8 (2) ◽  
pp. 78-83 ◽  
Author(s):  
Nihat Laçin ◽  
Emre Aytuğar ◽  
İlknur Veli
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Turkish Population ◽  
Mandibular Canal ◽  
Cone Beam ◽  
Chi Square ◽  
Bifid Mandibular Canal ◽  
Chi Square Test ◽  
Male Patients ◽  
The Right

Aim: The aim of the study was to examine the prevalence of bifid mandibular canals (BMC) in a Turkish population, using cone-beam computed tomography (CBCT). Methodology: The CBCT images of 350 untreated patients (178 male, 172 female ranging in age between 18 and 65,) were included in this study. The presence or absence of BMC was determined in axial, sagittal, and coronal planes by considering gender and side. For statistical evaluation, a chi‑square test was used to determine any differences in the prevalence of BMC with significance set at 5%. Results: BMCs were observed in 129 out of 700 sides (18.42%) and 97 out of 350 patients (27.71%), of which, 55 were in males and 42 in females. Regardless of gender, the right side was more frequently affected (73%). Male patients showed higher prevalence (15.71%) than the female patients (12%). Conclusion: BMC was observed in 27.71% of examined Turkish subjects and detected more frequently in males and on the right side.

CBCT Evaluation of the Severity of Maxillary Impacted Canines Using the KPG Index

2018 ◽  
Vol 69 (6) ◽  
pp. 1458-1461
Author(s):  
Cristian Olteanu ◽  
Ioana Ganea ◽  
Andreea Pop ◽  
Ondine Lucaciu ◽  
Viorica Tarmure ◽  
...  
Keyword(s):  
Cone Beam ◽  
Study Group ◽  
Treatment Level ◽  
Impacted Tooth ◽  
Spatial Estimation ◽  
Ideal Position ◽  
Impacted Canine ◽  
Level Of Difficulty ◽  
Cone Beam Computer Tomography

The use of CBCTs (cone beam computer tomography) instead of 2D radiographs in impacted tooth cases allows precise localisation of the impacted canine in all three axial directions, accurate evaluation of its relations with its neighbouring structures and spatial estimation required for the placement of the impacted canine on the arch. Together with today�s technological advancements, CBCT has improved, as well as its accuracy to localise impacted maxillary canines with the KPG index a system for 3D classification of impacted maxillary canines on CBCT, in report to its ideal position on the arch. The aim of this study was to evaluate the treatment difficulty for impacted maxillary canines by the use of the KPG index, for a study group of patients being diagnosed with impacted maxillary canines. Based on this, the orthodontist can rapidly establish the treatment level of difficulty for the impacted canine.

scholarly journals Root proximity of miniscrews at a variety of maxillary and mandibular buccal sites: Reliability of panoramic radiography

2019 ◽  
Vol 89 (4) ◽  
pp. 611-616 ◽  
Author(s):  
Jae-Hwa An ◽  
Yong-Il Kim ◽  
Seong-Sik Kim ◽  
Soo-Byung Park ◽  
Woo-Sung Son ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Orthognathic Surgery ◽  
Panoramic Radiography ◽  
Cone Beam ◽  
Central Incisor ◽  
Intermaxillary Fixation ◽  
Extreme Caution ◽  
The Mean ◽  
Root Proximity ◽  
The Right

ABSTRACT Objectives: To assess the root proximity and the insertion angles of miniscrews after miniscrew placement at a variety of maxillary and mandibular buccal sites using cone-beam computed tomography (CBCT) and to determine the differences in root proximity between CBCT and panoramic radiography (PR). Materials and Methods: This retrospective study included 50 patients (mean age, 22.0 ± 4.5 years) who underwent postoperative CBCT and PR after miniscrew placements for intermaxillary fixation in orthognathic surgery. Twelve miniscrews were placed in the buccal bone of each patient: at sites between the central incisor and lateral incisor (SII), sites between the canine and first premolar (SCP), and sites between the second premolar and first molar (SPM) on the right and left sides of the mandible and maxilla. The insertion angles were measured on CBCT, and the root proximity was assessed on CBCT and PR. Results: The mean vertical placement angles ranged from 84.27° to 95.12°, and the mean horizontal placement angles ranged from 90.93° to 101.1°. The rates of no contact between the root and the miniscrew were 68.0% in the SII, 50.5% in the SCP, and 57.8% in the SPM, which were significantly different (P = .000). The total concordance rate between PR and CBCT was 41.3%. Conclusions: Clinicians should use extreme caution during placement of miniscrews in the SCP. There are limitations on the use of PR for evaluating the root proximity of miniscrews.

scholarly journals Incidence and Anatomical Properties of Retromolar Canal in an Iranian Population: A Cone-Beam Computed Tomography Study

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
N. Nikkerdar ◽  
A. Golshah ◽  
M. Norouzi ◽  
S. Falah-Kooshki
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Third Molar ◽  
Iranian Population ◽  
Cone Beam ◽  
Third Molars ◽  
The Third ◽  
The Mean ◽  
Anatomical Properties ◽  
Retromolar Canal

Objectives. Retromolar canal (RC) is an anatomic structure, and due to increasing demand for surgical procedure in the retromolar area of the mandible, the identification of the retromolar canal has become an issue of clinical concern. It can innervate the third molar and some of the muscles around the posterior segment of the mandible, complicating surgical procedures in the retromolar area and root canal treatment of third molars. The aim of this study was to evaluate the incidence and anatomical properties of RC in a western Iranian population using cone-beam computed tomography (CBCT) images. Materials and Methods. Two hundred bilateral CBCT images were collected and screened in the three spatial planes for the presence of an RC. Anatomical properties and location of the RCs were assessed according to their course and distance from the surrounding structures. The relationship between the presence of RC and age, sex, side, and presence of second and third molars was also evaluated. Independent samples t-test, ANOVA, Tukey’s post hoc test, paired t-test, and chi-square were used to compare groups. Results. At least one RC was observed in 22% of the mandibles. Its bilateral incidence was 5.5%. Two major types of canals were detected, namely, type I, following a straight or curved course from the mandibular canal (MC) to the retromolar area (47.3%), and type II, coursing from the retromolar area to the radicular part of the third molar (52.7%). Regarding linear measurements, the mean RC diameter and the mean distance to the MC, second, and third molars were 0.68 ± 0.31, 13.7 ± 2.8, 15.3 ± 3.0, and 7.3 ± 2.3 mm, respectively. Conclusion. Based on the results of this study, RC was found in 22% of the cases; thus, it should be considered as a normal anatomical variation in the Iranian population rather than a rare finding.

Can palatal depth influence the buccolingual inclination of molars? A cone beam computed tomography-based retrospective evaluation

2020 ◽  
Vol 47 (4) ◽  
pp. 303-310
Author(s):  
Prasanna Arvind TR ◽  
SP Saravana Dinesh
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Tamil Nadu ◽  
Cone Beam ◽  
Skeletal Class ◽  
The Mean ◽  
Student’S T ◽  
Suitable Reference ◽  
The Right ◽  
Vertical Growth Pattern

Objective: To interpret a correlation between buccolingual inclination of molars and palatal depth in hyperdivergent patients and to identify importance of determining inclination of molars in assessing transverse discrepancies (as skeletal or dental) Design: This was a retrospective cone beam computed tomography (CBCT) study. Setting: The study was conducted in the Department of Orthodontics, Saveetha Dental College and Hospital, Tamil Nadu, India. Methods: This was a retrospective CBCT study of 79 patients who underwent diagnostic CBCT for treatment purposes. The CBCT scans were evaluated systematically and the required parameters were accessed with suitable reference planes. Student’s t-test (95% confidence interval) was performed to determine buccolingual inclination of first molars between the right and left sides. Only patients with a vertical growth pattern and skeletal class I relation were included and they were classified into three groups based on their palate depth. Results: In patients with palatal depth > 22 mm, the mean inclination of molars was 7.4°; with palatal depth in the range of 19–22 mm, the mean inclination of molars was 5.23°; and with palatal depth < 19 mm, the mean inclination of molars was 2.9°. Results showed that there was a significant correlation between the buccolingual inclination of molars and the palate depth in vertical growers ( P < 0.05). Conclusion: The buccolingual inclination of first molars is increased in patients with greater palatal depth. This parameter is helpful in classifying crossbites as skeletal or dental. The amount of compensation required to correct the cross bite can be adjusted using Korkhaus Index.

scholarly journals A volumetric study of mandibular condyles in orthognathic patients by semiautomatic segmentation

2021 ◽  
Author(s):  
Max-Philipp Lentzen ◽  
Maximilian Riekert ◽  
Johannes Buller ◽  
Andrea Grandoch ◽  
Matthias Zirk ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Volumetric Analysis ◽  
Cone Beam ◽  
Bivariate Analysis ◽  
Semiautomatic Segmentation ◽  
Computed Tomography Images ◽  
Precise Knowledge ◽  
The Mean ◽  
The Right

Abstract Purpose This study was conducted to elucidate volumetric data of mandibular condyles of orthognathic patients by analyzing cone beam computed tomography images based upon semiautomatic segmentation. Methods Cone beam computed tomography images of 87 patients with malocclusions were analyzed in this retrospective study. Patients were between 17 and 53 years old and diagnosed with Angle class I, II, or III malocclusion. By using the validated open-source software “ITK-SNAP,” the volumetric measurements of 174 mandibular condyles were performed. Volumetric analysis was performed according to intra-subject side differences by paired Student t test. In accordance to inter-subject side, gender, age and type of malocclusion differences bivariate analysis and ANOVA were applied. Results The mean volume for the right condyle was 1.378 ± 0.447 cm3, with a maximum of 2.379 cm3 and a minimum of 0.121 cm3. The mean volume for the left side was 1.435 ± 0.474 cm3, with a maximum of 3.264 cm3 and a minimum of 0.109 cm3. Bivariate analysis indicated a highly significant inter-subject difference between the volume of the left and right mandibular condyles (p < 0.01). Females had a significantly smaller condyle volume than males (p < 0.05 left condyle; p < 0.01 right condyle). Conclusion The fact that shape and volume of mandibular condyles show a high susceptibility to pathological alterations and particularly malocclusions makes a precise knowledge about volumetric changes indispensable. Our results show that significant inter-subject differences in condyle volume could be found with respect to the side and gender. Larger volumes could be assessed for the left condyle and for male patients.

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