Permanent Mandibular Incisors Research Articles

Radiographic assessment of root canal morphology of mandibular central incisors using new classification system: A cross-sectional study.

Lack of basic knowledge about the external and internal anatomies of the root canal system and common variations in teeth may lead to various procedural errors or treatment failure. In this study, the root canal configurations of mandibular incisors and the symmetry of the contralateral incisors of Saudi Arabian subpopulations were analyzed and determined using cone beam computed tomography (CBCT). A retrospective evaluation of 700 patients was conducted, and 1260 fully developed permanent mandibular central incisors were assessed. The number of root canals was determined, and the internal root canal anatomies were categorized based on Ahmed et al.’s criteria. The CBCT images were independently evaluated by 2 trained dentists and an endodontist. The data were assessed using the chi-square and one-way analysis of variance tests. All the mandibular central incisors included in the study were single-rooted. According to Ahmed et al’s classification system, the most common classification (82.6%) was 1ManA1 (Vertucci type I), followed by 1ManA1-2-1 (Vertucci type III; 13%). Second canals were more frequently recorded in the male participants than in the female participants. The root canal configuration between contralateral incisors was largely symmetrical. Most of the mandibular incisors in the examined Saudi Arabian population had a single canal. Nevertheless, a substantial number of patients had a complex root morphology. Hence, CBCT can be utilized as a potential supplementary tool during root canal treatment.

ERUPTED COMPOUND ODONTOMA IN PATIENT WITH SEIZURES: A CASE REPORT

Erupted odontomas are rare in the oral cavity. During the intraoral examination of a 17-year-old girl in investigation of Dravet syndrome, psychogenic nonepileptic seizures, and psychotic disorder, an enamel-like tissue exposed in gingiva was identified. The lesion size was around 2 mm, localized between the right permanent mandibular lateral incisor and canine teeth. Periapical radiography revealed a radiopaque image of irregular tooth-like structures, suggesting the presence of an erupted compound odontoma. The lesion was surgically removed under infiltrative anesthesia, without the need for a flap. Four small tooth-like structures were removed and the specimens were sent for histopathologic analysis, confirming the hypothesis of compound odontoma. The procedure was achieved without complications or need of patient sedation. Twenty days after the surgery, there was satisfactory healing of tissue in the operated region. Erupted odontoma are rare. The patient follows her treatments with the team. Erupted odontomas are rare in the oral cavity. During the intraoral examination of a 17-year-old girl in investigation of Dravet syndrome, psychogenic nonepileptic seizures, and psychotic disorder, an enamel-like tissue exposed in gingiva was identified. The lesion size was around 2 mm, localized between the right permanent mandibular lateral incisor and canine teeth. Periapical radiography revealed a radiopaque image of irregular tooth-like structures, suggesting the presence of an erupted compound odontoma. The lesion was surgically removed under infiltrative anesthesia, without the need for a flap. Four small tooth-like structures were removed and the specimens were sent for histopathologic analysis, confirming the hypothesis of compound odontoma. The procedure was achieved without complications or need of patient sedation. Twenty days after the surgery, there was satisfactory healing of tissue in the operated region. Erupted odontoma are rare. The patient follows her treatments with the team.

Comparative evaluation of the fracture resistance of reattched fragments using three different retentive methods: An in vitro study

: Traumatic injuries to the anterior teeth are one of the most difficult and perplexing problems faced in the paediatric dentistry. Coronal fracture of the anterior teeth is a common form of dental trauma that mainly affects the maxillary and mandibular incisors. Fragment reattachment has been the preffered technique among clinicians because it has several advantages over the composite restorations such as it is a conservative procedure, maintains original tooth contours, translucence and incisal edge wears at similar rate to adjacent teeth.: To compare and evaluate the fracture resistance of reattached fragments using three different methods.Forty sound permanent mandibular central and lateral incisor were selected and mounted in self-cure acrylic resin. The teeth were sectioned with a diamond disc 3mm short of the incisal edge and they were randomly divided into four groups (n=10). Group I – simple reattachment, group II- internal dentinal groove, group III – vertical groove with fiber reinforced post placement, group IV – overcontouring done before the reattachment procedure. The force required to fracture the specimen were recorded using an onscreen calibration tool of the universal testing machine. The results were statistically analyzed.: The results showed that group I, group II and group IV required lesser force to fracture when compared with group III.: The group restored with fiber reinforced post showed the highest value of fracture strength while the simple reattachment had the lowest value.

Comparison of the Microhardness of Surface Enamel Exposed to Anti-asthmatic Inhalants

To determine the effect of anti-asthmatic inhalers salbutamol and budesonide on the surface microhardness of bovine tooth enamel. The study was experimental, prospective, longitudinal, and comparative. The sample consisted of permanent mandibular incisors, which were prepared in (n = 90) blocks of dental enamel of size 3 × 3 mm and 2 mm thick, separated into 6 groups of 15 specimens each in sterile bottles properly labeled and contained in artificial saliva at 37°C. Three measurements (baseline, 5 days, and 10 days) were performed after immersion to determine the microhardness using a Vickers microdurometer programmed to apply a load of 100 gm for 15 seconds. It was observed that the enamel surface microhardness decreased after 5 and 10 days, after being in contact with the anti-asthmatic inhalers based on salbutamol and budesonide. In addition, it was evidenced that there is a greater decrease in the superficial microhardness of the enamel when comparing the values at the beginning and after 10 days; likewise, the reduction in the microhardness of enamel exposed to budesonide was greater (120.8 kg/mm2) compared to salbutamol (112.3 kg/mm2) (p<0.001). The two anti-asthmatic inhalers studied decreased superficial enamel microhardness, with the budesonide-based inhaler having a greater erosive effect. This research allowed us to know the values of the microhardness of the superficial enamel after being exposed to different anti-asthmatic inhalers that are indicated in daily clinical practice. Therefore, it is important to evaluate this microhardness since the use of different inhalers is very prevalent.

Analysis of Root Canal Anatomy of Mandibular Permanent Incisors in Saudi Subpopulation: A Cone-Beam Computed Tomography (CBCT) Study.

This study aimed to evaluate the root canal anatomy of central and lateral mandibular incisors in a Saudi population using cone-beam computed tomography (CBCT). Overall, 1370 CBCT images of central (687) and lateral (683) mandibular incisors of Saudi patients who attended the Dental College at King Saud University in Riyadh were examined. The number of roots and canals, canal configuration types, symmetry between bilateral incisors, and the effect of gender and age were determined. For data analysis, the chi-square test was applied, and the p value was set at ≤0.05. Only one tooth had two roots, and 41% of mandibular incisors had two canals. The most common canal configuration type observed was type I (58.83%), followed by type III (28.24%). Type V was more common in men (8.31%) than women (3.9%). Bilateral symmetries were higher in the mandibular central incisors regarding the root and canal numbers and the canal configuration types (100, 100, and 97.92%, respectively) than in the lateral incisors (99.69, 98.16, and 97.24%, respectively). The 21–40 age group showed a higher proportion of teeth with more complicated root canal anatomy than the other age groups. More than one canal in mandibular incisors is a common finding in the Saudi subpopulation, with the type III canal configuration as the most common type.

Evaluation of canal configuration and frequency of second canal in mandibular lateral incisor using Cone Beam Computed Tomography (CBCT)

Objective: To categorize root canal configuration according to Vertucci’s classification and determine the frequency of second canal in mandibular lateral incisors of Pakistani subpopulation (Karachi based) by using Cone Beam Computed Tomography.&#x0D; Study Design: Cross sectional study.&#x0D; Place and Duration of Study: Out-patient department of Oral and Maxillofacial Surgery and the department of Radiology at Dow University of Health Sciences, Karachi Pakistan, from Jan to Jul 2019.&#x0D; Methodology: Study was conducted on 160 extracted permanent mandibular lateral incisors. After extraction, teeth were randomly arranged in wax models and imaged via CBCT. Each tooth sample was analyzed in axial and sagittal sections. The images were investigated by two blinded examiners and data on canal morphology was recorded.&#x0D; Results: The frequency of single canal mandibular incisors was recorded as 107 (66.9%) whereas 53 (33.1%) of teeth showed two canals. Females presented with a higher frequency of two canalled incisors, although the results were statistically insignificant. The most prevalent canal anatomy detected was Type I (105, 65.6%) followed by Type III (33, 20.6%), Type II (12, 7.5%) and Type V (10, 6.3%). Mandibular lateral incisors presenting with two canals anatomy, Type III (32, 97%) morphology was most commonly detected followed by Type II (12, 100%) and Type V (9, 90%).&#x0D; Conclusion: CBCT scans are an effective tool for identification of root canal morphology. Mandibular lateral incisors most frequently presented with Type I canal anatomy whereas incisors with two canals most frequently presented with Type III configuration.

TANAKA AND JOHNSTON'S MIXED DENTITION VALIDITY: AN ANALYSIS AMONG YEMENI ADULTS IN SANA'A CITY

Introduction and objective: Mixed dentition space analysis methods via Tanaka-Johnston analysis are regularly used all over the world. Conversely, the appropriate of this analysis between different ethnic groups is dubious. The study aimed to test the appropriate of the Tanaka-Johnston analysis for Yemeni adults and to arise regression equations designed for Yemen population if needed. &#x0D; Methods: The study included two hundred and twenty-seven (106 males and 121 females) Yemenis from Sana'a University, University of Science and Technology, and Al-Rehab Private Clinic. The mesiodistal widths of the four permanent lower canines, incisors, and premolars for the entire quadrants were determined with a digital caliper to the nearest 0.01 mm. To compare average presentation values ​​derived from this study with values ​​derived using Tanaka-Johnston equations, Student's paired t-test was used, as well as the chi-square (χ2) test used for appropriateness of fit.&#x0D; Result: Gender differences were observed in the total mesiodistal width of both canines and premolars in both arches as revealed by the t-test (p &lt; 0.001). The sum of the actual mesiodistal width of the canines and premolars was compared with the expected widths derived from the Tanaka and Johnston equation and significant differences (p&lt;0.001) were found. Regression analysis indicated that the sum of the mesiodistal width of the permanent mandibular incisors is a good predictor of that of un-erupted canines and premolars, with correlation coefficients ranging from 0.51 to 0.61. Accordingly, two linear regression equations were developed to predict tooth width for Yemeni males and females.&#x0D; Conclusion: It was concluded from this study that the Tanaka-Johnston analysis did not accurately predict the mesiodistal width of the unruptured canines and premolars of the Yemeni population. Moreover, new regression equations have been developed for the research sample that can be a standard for Yemen. However, further studies must be performed to verify the applicability and accuracy of these equations.&#x0D; &#x0D; Peer Review History: &#x0D; Received: 10 November 2021; Revised: 12 December; Accepted: 29 December, Available online: 15 January 2022&#x0D; Academic Editor: Dr. Asia Selman Abdullah, Pharmacy institute, University of Basrah, Iraq, asia_abdullah65@yahoo.com&#x0D; UJPR follows the most transparent and toughest ‘Advanced OPEN peer review’ system. The identity of the authors and, reviewers will be known to each other. This transparent process will help to eradicate any possible malicious/purposeful interference by any person (publishing staff, reviewer, editor, author, etc) during peer review. As a result of this unique system, all reviewers will get their due recognition and respect, once their names are published in the papers. We expect that, by publishing peer review reports with published papers, will be helpful to many authors for drafting their article according to the specifications. Auhors will remove any error of their article and they will improve their article(s) according to the previous reports displayed with published article(s). The main purpose of it is ‘to improve the quality of a candidate manuscript’. Our reviewers check the ‘strength and weakness of a manuscript honestly’. There will increase in the perfection, and transparency. &#x0D; Received file: Reviewer's Comments:&#x0D; Average Peer review marks at initial stage: 6.5/10&#x0D; Average Peer review marks at publication stage: 7.5/10&#x0D; Reviewers:&#x0D; Dr. A.A. Mgbahurike, University of Port Harcourt, Nigeria, amaka_mgbahurike@yahoo.com&#x0D; Rola Jadallah, Arab American University, Palestine, rola@aauj.edu&#x0D; Similar Articles:&#x0D; PREVALENCE AND CAUSES OF TRAUMATIC DENTAL INJURIES TO ANTERIOR TEETH AMONG PRIMARY SCHOOL CHILDREN IN SANA'A CITY, YEMEN &#x0D; OCCLUSAL CHARACTERISTICS OF THE PRIMARY DENTITION AMONG A SAMPLE OF YEMENI PRE-SCHOOL CHILDREN

Cone-beam computed tomographic analysis of root canal morphology of permanent mandibular incisors - Prevalence and related factors.

Objectives:To investigate the prevalence of additional canals and the occurrence of oval canals in apical third area of mandibular permanent incisors of Saudi sub-population.Methods:This study was conducted from November 2020 to May 2021 at College of Dentistry, Qassim University. For the investigation purpose of this study, 314 scans were analyzed within the age limits of 13 to 70 years. The root canal morphology, presence of oval canals, number of roots, and prevalence of various canal configurations based on age, gender and bilateral symmetry were recorded. The obtained data was statistically analyzed using SPSS software.Results:The mandibular central incisors (CI) exhibited, significant difference between Type-I, II, III and IV canal configurations and Type-I, II, III and V canal configurations (p < 0.05). For the mandibular lateral incisor (LI), significant difference was found between Type-I, II, III, IV and VII canal configurations (p < 0.05). The cumulative prevalence of oval canals in mandibular incisors was found to be 46.6%. For both mandibular CI and LI, the prevalence of Type-I canals was significantly higher in males as compared to females (p < 0.05). Conversely, significantly higher prevalence of Type-III canals was noted for females as compared to males (p < 0.05). No significant difference was found in the prevalence of different canal configurations on the left and the right side of the mouth.Conclusion:In this study, multiple canals were prominently recognized with Type-III mandibular incisors dominating this feature. Oval canals were predominantly found in single canal especially Type-III. This research suggests variability in canal morphology among different populations. Knowledge of these aberrant canal anatomies is useful for the clinician to achieve a favorable endodontic outcome.

The applicability of the Tanaka and Johnston analysis in a contemporary Western Australian population

Abstract Background/Objective The Tanaka and Johnston mixed dentition analysis is a widely used method to predict the size of unerupted permanent canines and premolars. The aim of the present study was to determine the applicability of the Tanaka and Johnston analysis to Western Australian adolescents and develop a new regression equation. Methods Five hundred participants (323 females, 177 males) meeting the inclusion criteria were selected from private orthodontic clinics. The mesiodistal dimensions of all permanent teeth were retrieved from pre-orthodontic treatment digital dental records using Invisalign® technology (Invisalign®, Align Technology, Santa Clara, CA, USA) and analysed using a predicted value derived from the Tanaka and Johnston analysis. Correlation and linear regression analyses were applied to develop new regression equations. Result A significant difference was found between the actual and predicted values derived from the Tanaka and Johnston analysis. A significant correlation was observed between the sum of the permanent mandibular incisors and the sum of the maxillary and mandibular canine and premolars (0.58–0.74). New regression equations and tables were derived from the study population. Conclusion The Tanaka and Johnston analysis overestimated the mesiodistal dimensions of permanent canines and premolars. The developed regression equation and tables may be used for orthodontic diagnosis and treatment planning in Western Australian adolescents.

Fracture resistance of simulated human immature teeth reinforced with anatomic post and MTA as apical barrier

Background: The development of immature teeth can be arrested because of various harmful stimuli such as trauma, caries, and anatomic variations such as dens evaginatus. The present study was conducted to compare fracture the resistance of simulated human immature teeth treated with anatomic post and MTA as apical barrier. Materials & Methods: 32 permanent mandibular incisors were randomly divided into two groups of 16 each. Group I—apical barrier using Biodentine and Group II—apical barrier using MTA (MTA Plus). Fracture resistance was compared. Results: Fracture resistance of control was 640.4 and in group II was 613.5. Everstick showed value of 1476.3 MPa in group I and 1290.5 MPa in group II. Inter- group comparison was significant (P

Ameloglyphics Patterns of Primary and Permanent Dentition Using Staining Method: An Observational Study

Background: Forensic Odontology is a branch of Odontology which in the interest of justice deals with the proper handling and examination of dental evidence and with the proper evaluation and presentation of dental findings. Various applications of forensic dentistry include age estimation, bite mark analysis, ameloglyphics, rugoscopy, cheiloscopy, photographic study, genetic material analysis, and PCR for pulp DNA analysis. The aim of this study is to find out the utility of Hematoxylin and Toluidine blue stains in studying enamel rod end patterns of various dentitions in forensic odontology.&#x0D; Results: In our study, Mean and standard deviation value of Hematoxylin and Toluidine blue showed the surface score of 6.4±1.782 and 6.6±1.979 respectively. Both maxillary and mandibular Permanent central Incisors showed lowest scores when compared to remaining dentition included in the study.&#x0D; Conclusion: To conclude, Ameloglyphics patterns can be studied by staining the tooth. The Ameloglyphics pattern can be analyzed using hematoxylin and toluidine blue stains. Ameloglyphics patterns can be used as a valuable tool in personal identification when stained correctly, and they have a bright future in forensic dentistry.

Arch Measurements, Bigonial Width, Dental Caries, and Their Effect on Occurrence of Mandibular Incisors Crowding in Early Mixed Dentition Period.

Aim and objectiveTo assess the effect of various arch parameters, bigonial angle, and caries occurrence on mandibular incisors crowding during the early mixed dentition period.Materials and methodsSixty children (mean age of 7.5 years) with mandibular anterior incisors crowding and class I molar relationship in early mixed dentition were selected. Bigonial width (BW) and caries occurrence were recorded during patient examination. The study casts were prepared divided into a normal group (NG) and crowded group (CG). Different vertical and transverse arch perimeters along with space available for the permanent mandibular incisors were measured manually. Statistical analysis was done to establish the association of all these variables with two crowding groups.ResultsThe total incisor width or the tooth material was significantly more, and all arch parameters were less in measurements in CG than NG. The available space, BW, and caries occurrence did not differ significantly between NG and CG.ConclusionThe amount of tooth material and individual variations in arch parameters significantly contribute to mandibular anterior crowding in the early mixed dentition period irrespective of the age and gender of the child.Clinical significanceAll cases of early mixed dentition mandibular incisors crowding should be individually assessed for arch length discrepancy, and transverse discrepancy results of this study help in the prediction of crowding before an establishment of a customized treatment plan with the use of lingual arch or lip bumper appliances in patients with anterior mandibular crowding may be valuable.How to cite this articlePaul S, Garg S, Saraf BG, et al. Arch Measurements, Bigonial Width, Dental Caries, and Their Effect on Occurrence of Mandibular Incisors Crowding in Early Mixed Dentition Period. Int J Clin Pediatr Dent 2021;14(S-1):S57–S62.

Deficiencies in Root Canal Fillings Subsequent to Adaptive Instrumentation of Oval Canals.

Simple SummaryEmploying a chemo-mechanical preparation, one of the primary procedural phases in endodontic therapy is carefully removing debris, pulp tissue, and bacteria from the root canal system. The cross-sectional root canal shapes comprise circular, oval, long oval, flattened, or irregular. The frequency of oval root canals in the apical third of human teeth is around 25 to 50%. Motorised endodontic files leave almost 60% of the oval root canal perimeter unaffected by their instrumentation, thus resulting in faulty obturation that is required to prevent reinfection and to restrict the passage of microorganisms and toxins to and from the periapical tissue.The purpose of this study was to explore the influence of instrumentation and the potential for debris deposition using XP-endo shaper plus (XP-SP) and full-sequence SAF (F-SAF) on the adaption of thermoplastic root canal fillings in oval canals. Following the manufacturer’s instructions, ninety human permanent mandibular incisors with a single oval canal 6 mm from the apex (verified using pre-operative CBCT scanning) were instrumented with XP-SP and F-SAF. Obtura III Max apparatus was used for root canal obturation without the use of a root canal sealer. The roots were then sectioned 6 mm from the apex and examined with a digital stereomicroscope at x25 magnification to assess the root canal fillings. The F-SAF was associated with a significantly higher (p < 0.01) percentage of entire adaptation of the root fillings (76%) compared to the XP-SP (57%). Furthermore, the XP-SP group was also associated with higher (p < 0.01) defective obturation with debris at 17% and with voids at 26%. However, the F-SAF had lower percentages of defective obturations (7% with debris and 17% with voids). The quality of obturation of oval canals instrumented using full-sequence SAF was better.

Comparative study of Vertucci and Ahmed classifications to evaluate the main root canal configuration of mandibular incisors in a Brazilian population.

This study aimed to compare the main root canal configurations of mandibular incisors (MI) in a Brazilian population using Vertucci and Ahmed etal. classifications. One hundred and sixty-five human permanent MI were scanned using a micro-CT. Two examiners classified the samples according to Vertucci and Ahmed etal. classification. Kappa coefficient was employed. The majority of MI had a single root canal (52.1%). Type III Vertucci and 1 MI1-2-1 Ahmed etal. was the most common 2-canal MI (20%). In the apical third, the presence of one, two and three canals was found in 81.8%, 15.2% and 3% respectively. In the cervical and middle thirds, one, two and three canals were found in 86%, 12.2% and 1.8% respectively. Ahmed etal. classification was able to classify the entire sample studied, whereas 11 teeth (6.66%) did not fit Vertucci's classification.

Root and Root Canal Morphology of Permanent Mandibular Anterior Teeth in a Sample of Egyptian Population

Objectives The aim of this work was to study the morphology of root and root canals of permanent mandibular anterior teeth in a sample of the Egyptian population. Methods A total of 16 permanent mandibular central incisors (I1), 25 permanent mandibular lateral incisors (I2) and 15 permanent mandibular canines (C) were collected and classified into groups according to shape and number of roots. Molds of pink wax with the samples were submitted for cone beam computed tomography (CBCT). The number and shapes of roots were determined and types of root canals were assessed and classified according to Vertucci's classification. Finally, data was statistically analyzed. Results Regarding the macroscopic appearance of I1, all the samples had one root while I2 had one root with 92%. As for C, 80% of the sample was with one root. CBCT revealed the following configurations, according to Vertucci's classification; Regarding I1, Type I was the most common canal configuration (75%) followed by type II (12.5%) and type III (12.5%) Regarding I2, Type I (60%) was the most common configuration followed by type III (28%). As for C, 66.7% of the sample was represented by type I followed by type III and IV, where each was represented by 13.3%. Conclusions There are morphological variations in the root and root canal anatomies of the mandibular central incisors, lateral incisors, and canines of Egyptian population as compared to other populations.

Compound odontoma causing impaction of primary tooth in a 4-year-old child: case report

Objective: to report a rare case of impaction of a primary mandibular incisor due to the presence of a compound odontoma and describe its clinical management. Case report: a 4-year-old boy presented with a“missing” primary left mandibular lateral incisor. Radiographs showed impaction of the unerupted incisorby adjacent radiopaque structures consistent with a compound odontoma. The patient was recalled periodically for 2 years, at which time surgical excision was performed. The diagnosis of compound odontoma was confirmed histologically, and the permanent mandibular central incisors erupted uneventfully; the patient was referred for orthodontic treatment. Final considerations: this case report describes an unusual case of compound odontoma associated with an unerupted deciduous tooth; odontomas are rare in this age range, occurring predominantly in the second decade of life and in association with impaction of permanent teeth. We also propose a protocol for clinical management of such early-onset cases.

A comparative assessment of failures and periodontal health between 2 mandibular lingual retainers in orthodontic patients. A 2-year follow-up, single practice-based randomized trial

The objective of this study was to compare the survival rates and periodontal health in patients with 3-strand round twisted (RT) vs 8-strand rectangular braided (RB) fixed retainers bonded to all 6 anterior teeth in the mandible. A total of 133 patients completing orthodontic treatment (median age, 24.6years; 25th percentile, 17.2years; 75th percentile, 32.4years; minimum, 15.1years; maximum, 49.8years) were randomly allocated in a 1:1 ratio to receive either an RT or RB wire retainer. Inclusion criteria were all mandibular permanent incisors and canines present, no active caries, no restorations, no fractures on the mandibular incisors and canines, no periodontal disease. Patients with poor oral hygiene before debonding were excluded from the trial. The primary outcome was any first-time retainer failure. Secondary outcomes were periodontal index, bleeding on probing, plaque index, gingival index, and probing depth. Randomization was accomplished with random permuted blocks of size 4, 6, or 8 with allocation concealed in sequentially numbered, opaque, sealed envelopes. Blinding was not possible in this trial. Patients were evaluated at baseline, 3, 6, 12, 18, and 24months after placement of the retainer. Retainer survival was assessed using Cox regression. Periodontal parameters were reported at each time point and generalised estimating equations were used to assess the effect of treatment, time, tooth and treatment X time interaction on the indices. Baseline characteristics were similar between groups; in 1 patient, the intervention was discontinued. During 2-year follow-up 37 of 66 (56.1%, RT group) and 32 of 66 (48.5%, RB group) retainers failed at least once (log-rank test, P=0.55). The adjusted hazard ratio was 0.69 (95% confidence interval, 0.42-1.12; P=0.13). Neither age nor gender was a predictor of failure. All periodontal parameters (periodontal index, bleeding on probing, plaque index, gingival index, and pocket depth) were comparable between groups and remained relatively stable during follow-up. The overall risk for first-time failure was high and amounted to 52.3% (56.1% in the RT group and 48.5% in the RB group). There was no difference in terms of survival or periodontal health between the examined retainers.

Applicability of Moyers’ Prediction Table in Orthodontic Patients Reporting to KCD Peshawar Population

Objectives: The aim behind this research, is to determine the applicability of Moyers’ table in Peshawar population.Materials and Methods: A total 100 patients’ casts how had complete details in their files, who were Pakistani nationals, having complete set of permanent teeth upto 1st molar, no proximal restorations and caries were included. Patients having dentalanomalies, previous orthodontic treatment, craniomandibular dysfunctions, attritions of teeth and Syndromes were excluded.The mesiodistal widths of the maxillary and mandibular permanent incisors, canines, first and second premolars were measured using digital calipers. The predicted total, of the mesiodistal diameters of the canines and premolars, was evaluated from the Moyers tables at 75%. Pearson's correlation test was applied, to determine the relationship between the total sum of the actualwidth of the canines and premolars and the sum of the predicted width of the canines and premolars from the Moyers table.Analysis was performed by SPSS version 20.0.Results: Most of participants were females 63(63%) as compared to males 37(37%). In maxilla the mean actual (23.76mm) andpredicted mesiodistal width(22.76mm) of cupids and bicuspids were close to each other. But the correlation between actual and predicted mesiodistal width of cupids and bicuspids in maxilla was weak. It was weak in female (r=0.156). In mandible for male the correlation was positive as well (r=0.8130) but it was weak for females (r=0.334). moderate correlation was found for overall .Conclusion: Moyer's prediction table is not a very precise method for estimating tooth dimensions in a Peshawar-based sample.

Management of developmental disturbances in a 12 year-old child- A multidisciplinary approach

Manifestation of developmental disturbances of the teeth can be in the form of variations in number, position, size, shape, eruption or structure. Such disturbances may be independent or associated with more generalised disorders. The form and structure of the teeth may be affected by local and general factors. This paper is a report of a 12-year-old girl with missing both permanent mandibular central incisors along with permanent maxillary right central incisor. Past history revealed trauma 5 years back due to fall from height. Radiographic examination revealed congenitally missing permanent mandibular left and right central incisors and dilacerated permanent maxillary right central incisor. A multidisciplinary approach has been presented for management of such cases.

Stability of early anterior open bite treatment: a 2-year follow-up randomized clinical trial.

This 2-year-follow up study compared and evaluated the stability of early anterior open bite (AOB) treatment based on different appliances. Children from 7 to 10 years with Angle Class I, AOB larger than 1.0 mm and fully erupted maxillary and mandibular permanent central incisors were eligible. The initial sample was 99 patients distributed, by simple randomization, into four groups: BS (bonded spurs), CC (chincup), FPC (fixed palatal crib) and RPC (removable palatal crib). Cephalometric analysis was performed at baseline (T1), final (T2) and 2-year post-treatment (T3) by taking the overbite measurements as the main outcome. Blinding was possible to cephalometric analysis. At T3, with dropouts, there were 63 individuals, being BS (n=15; overbite 0.19 mm; 11.54 years; 10 female (F)/5 male (M)); CC (n=11; overbite -0.19 mm; 11.41 years; 8 F/3 M); FPC (n=21; overbite 1.23 mm; 11.44 years; 15 F/6 M) and; RPC (n=16; overbite 0.73 mm; 11.67 years; 6 F/10 M). Changes in dentoskeletal variables and breaking deleterious oral habits during the follow up were statically analyzed with p<.05. Mandibular skeletal linear measurements and vertical dental components have gradually increased with age, manly at pubertal growth spurt and at the establishment of permanent dentition after treatment. Incisor teeth extrusion had impact on AOB correction and stability in 4 groups, which recorded a 1.15 mm-improvement of overbite after treatment (T3-T2). The experimental appliances were effective with stable results, being FPC the device recorded the highest AOB correction and the lowest patient withdrawal rate.