Maxillary Permanent Molars Research Articles

Accuracy of Three-Dimensional Printed Dental Models Based on Ethylene Di-Methacrylate-Stereolithography (SLA) vs. Digital Light Processing (DLP)

Additive manufacturing is a technology that has many uses across a variety of fields. Its usage spans many fields, including the fields of art, design, architecture, engineering and medicine, including dentistry. The study aims to evaluate and compare the accuracy of three-dimensional printed dental models based on ethylene di-methacrylate using the SLA and DLP techniques. For evaluation, a reference model containing 16 maxillary permanent molars was chosen. An ATOS Capsule 3D scanner was used to scan the reference model. Using a photo-cured liquid resin, eight three-dimensional printed models were obtained using the reference model as benchmark. Four of the models (A1–A4) were obtained using SLA printing technology and four models (B1–B4) were manufactured using DLP printing technology. A standard best fit method was used to pre-align the reference and the printed model surfaces. The height of the teeth, and the mesial–distal and buccal–lingual distances were analyzed. The assessment of the two manufacturing methods was achieved by using non-parametric tests to compare the mean ranks for the assessed features. The results show that models obtained through DLP had a higher precision but also a higher bias. Both methods still are within the required accuracy range for dental models.

Predictive factors of ectopic eruption of the maxillary permanent second molar: A retrospective study

Predictive factors of ectopic eruption of the maxillary permanent second molar: A retrospective study

Comparative evaluation of efficacy of bisecting angle technique, modified bisecting angle technique, and paralleling angle technique in avoiding zygomatic arch superimposition over apices of permanent maxillary molars

Comparative evaluation of efficacy of bisecting angle technique, modified bisecting angle technique, and paralleling angle technique in avoiding zygomatic arch superimposition over apices of permanent maxillary molars

The frequency and degree of expression of Carabelli’s trait on the permanent maxillary molars in a sample of Turkish individuals

Aim: Carabelli’s trait, a morphological feature on the mesiopalatal surface of the maxillary molars, has importance in anthropology, forensic sciences, and clinical dentistry. The aim of this study was to find the frequency and degree of expression of Carabelli’s trait and to assess the asymmetry of the trait, on three permanent maxillary molars in a sample of Turkish individuals. Methodology: Carabelli’s trait was evaluated using Dahlberg’s eight-grade scale on 462 subjects. Data were analyzed using a chi-square test. Results: The frequencies in the total, positive and negative expressions of the trait were, respectively, 64.5%, 37.7% and 26.8% on the first molars, 27.1%, 19.6% and 7.6% on the second molars and 10.3%, 8.7% and 1.6% on the third molars. The occurrence of the trait on the first and second molars was more prevalent in males than in females. The trait was most frequently bilateral and symmetrical without significant sex differences, with varying degrees of asymmetry that increased from the first to the third molars. The frequencies of presence-absence asymmetry and any degree of asymmetry on the first molars were 5.3% and 15.7%, respectively. Conclusion: This study revealed a comparatively high frequency of Carabelli’s trait with a relatively low asymmetry in a contemporary Turkish sample. This data has the potential to be used for anthropological, forensic, and clinical purposes. How to cite this article: Yılancı HÖ, Özkan G, Akkaya N, Boyacıoğlu H. The frequency and degree of expression of Carabelli’s trait on the permanent maxillary molars in a sample of Turkish individuals. Int Dent Res 2022;12(3):112-9. https://doi.org/10.5577/intdentres.2022.vol12.no3.2 Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

AN IN VITRO STUDY TO FIND THE INCIDENCE OF 2ND MESIOBUCCAL CANAL IN PERMANENT MAXILLARY FIRST MOLARS USING THREE DIFFERENT METHODS

Aims: The aim of this study was to evaluate the incidence of MB2 canals using three different methods (CBCT, clinical analysis (naked eye), and dental microscope) and to compare the efcacy of the three methods in identifying the incidence of MB2 canals in the maxillary permanent rst molars.Methodology:The study sample consisted of 20 extracted intact permanent maxillary rst molar. The access opening was done and clinical analysis is done for MB2 canal later the extracted tooth seen under microscope to locate MB2 and then subjected to CBCT. Results: By applying Chi-square test there is a signicant association between Incidence of Mesiobuccal 2 Canal in permanent maxillary rst molar and three different methods (naked eye, microscope, and CBCT) and after applying Z test of difference between two proportions of Incidence of Mesiobuccal 2 Canal is signicantly higher in method CBCT (40%) than method microscope (25%) and naked eye (15%).(p=0.0001) Conclusion: This study concluded that the incidence of MB2 canal detection was increased by the use of CBCTscans and dental microscope in comparison to naked eye.

Cone-beam computed tomography study of the incidence and characteristics of the second mesiobuccal canal in maxillary permanent molars.

Objective: This study aimed to review the characteristics of the second mesiobuccal canal (MB2) in the maxillary first and second permanent molars of 500 patients to analyze the incidence of MB2 and its connection with gender, age, tooth position, and mesiobuccal (MB) root length. The study also aimed to investigate the distribution of the root canal orifice on the pulp chamber floor to obtain an imaging reference for clinical practices related to maxillary molars in Fujian, China. Methods: In accordance with the enrollment criteria, cone-beam computed tomography images of the maxillofacial area were collected from 500 patients, including 1,000 maxillary first molars and 1,000 maxillary secondmolars. The patients were grouped according to gender and tooth position. The incidence of MB2 was observed, and the MB root length and distribution angle of the mesiobuccal-palatal-distobuccal root canal orifices were measured for statistical analysis. Results: The overall incidence of MB2 in maxillary first and secondmolars was 51.1% and 32.9%, respectively. The incidence of MB2 in maxillary molars was 50% in male patients and 35.45% in female patients, with a significant difference (p < 0.05). The incidence of MB2 in maxillary molars was significantly higher in subjects aged below 50 (especially in male patients) than those aged 50 and above. The MB root length of maxillary first and secondmolars with MB2 was longer than that without MB2, and the difference was statistically significant. An association was identified between the incidences of MB2 in contralateral molars of the same type and in ipsilateral adjacent molars. When MB2 occurred in the MB root of maxillary molars, the root canals were mostly classified as type IV, followed by type II. The angle formed by the MB-P-DB orifices on the pulp chamber floor in the maxillary first and secondmolars was (25.23 ± 5.20) and (20.17 ± 10.88)°respectively. Conclusion: The incidence of MB2 in maxillary molars is high in Fujian, China. The occurrence of MB2 is affected by gender, age, and length of MB root, and it occurs symmetrically in adjacent molars and in contralateral molars of the same type. In addition, the distribution law of the main root canal orifice at the pulp chamber floor is conducive to locating MB2, thereby guiding clinical operations.

Benign Spindel Cell Neoplasam: A Central Myofibroma of Maxilla in Male Child of Seven Years of Age: A Case Report

Myofibroma is a rare benign spindle cell neoplasm which occurs predominantly in infants and young children. It can occur as a solitary mass or as a multicentric lesion, consisting of myofibroblasts. In oral cavity, the sites most commonly involved are the mandible, tongue, lips and buccal mucosa however, it rarely involves the maxilla. It has aggressive clinical presentation mimicking malignancies. We report a case of a male child seven years of age presented with intraoral swelling on the left palatal aspect of the maxilla that extended from deciduous upper left second molar to the distal of upper permanent left first molar causing the mobility of these teeth. Radiologically, the lesion was osteolytic causing marked resorption of alveolar bone and displacement of permanent maxillary left second molar. A differential diagnosis of peripheral giant cell granuloma, central giant cell granuloma, fibroma, aggressive fibromatosis, nodular fasciitis, peripheral ossifying fibroma and spindle cell neoplasm was made. After the excluding malignant and vascular involvement, the surgical excision of the lesion was planned and was carried out under general anesthesia. Histologically, benign proliferation of spindle cells was seen giving the diagnosis of benign spindle cell neoplasm. Reports also showed positive immunoreactivity with vimentin and αSMA while non-responsive to desmin, validates the diagnosis of myofibroma. KEYWORDS: spindle cell neoplasm; myofibroma; maxilla

Differentiation of Occlusal Discolorations and Carious Lesions with Hyperspectral Imaging In Vitro

Stains and stained incipient lesions can be challenging to differentiate with established clinical tools. New diagnostic techniques are required for improved distinction to enable early noninvasive treatment. This in vitro study evaluates the performance of artificial intelligence (AI)-based classification of hyperspectral imaging data for early occlusal lesion detection and differentiation from stains. Sixty-five extracted permanent human maxillary and mandibular bicuspids and molars (International Caries Detection and Assessment System [ICDAS] II 0–4) were imaged with a hyperspectral camera (Diaspective Vision TIVITA® Tissue, Diaspective Vision, Pepelow, Germany) at a distance of 350 mm, acquiring spatial and spectral information in the wavelength range 505–1000 nm; 650 fissural spectra were used to train classification algorithms (models) for automated distinction between stained but sound enamel and stained lesions. Stratified 10-fold cross-validation was used. The model with the highest classification performance, a fine k-nearest neighbor classification algorithm, was used to classify five additional tooth fissural areas. Polarization microscopy of ground sections served as reference. Compared to stained lesions, stained intact enamel showed higher reflectance in the wavelength range 525–710 nm but lower reflectance in the wavelength range 710–1000 nm. A fine k-nearest neighbor classification algorithm achieved the highest performance with a Matthews correlation coefficient (MCC) of 0.75, a sensitivity of 0.95 and a specificity of 0.80 when distinguishing between intact stained and stained lesion spectra. The superposition of color-coded classification results on further tooth occlusal projections enabled qualitative assessment of the entire fissure’s enamel health. AI-based evaluation of hyperspectral images is highly promising as a complementary method to visual and radiographic examination for early occlusal lesion detection.

Report of a rare case: supernumerary tooth between the roots of the permanent maxillary first molar

Purpose: To present the case of a patient with an inter-radicular supernumerary tooth.&#x0D; Case report: A 45–year–old male patient presented with sepsis of odontogenic origin. Oral clinical investigation and panoramic radiography revealed the presence of four avital teeth with inadequate root canal fillings, including both maxillary first molars. The right one had periapical radiolucencies, indicating periapical periodontitis. The left one had an unusual radiopaque structure between the roots. Condensing osteitis, odontoma, and benign cementoblastomawere included in differential diagnosis; however, cone-beam computed tomography (CBCT) showed a miniature supernumerary tooth located between the buccal roots of this tooth. Surgical removal of the inter-radicular tooth was not indicated, because there were no associated pathological changes. Subsequently, the right first molar was extracted as the most likely source of systemic infection. The remaining three avital teeth were endodonticallyre-treated.&#x0D; Conclusion: An inter–radicular supernumerary tooth is a rare occurrence; however, it is important to take into account when evaluating a radiopacity associated with a permanent maxillary molar. Its image on conventional radiographs may be unclear due to overlap with the neighbouring roots. CBCT plays a leading role in radiologic diagnosis and the establishment of anatomical relationships.

Dento-skeletal response to three different protocols of rapid maxillary expansion in hyperdivergent growing subjects: a longitudinal retrospective study.

The aim of this study was to evaluate the dento-skeletal response in hyperdivergent growing patients comparing Rapid Maxillary Expansion (RME) using three different protocols. Three groups of hyperdivergent subjects treated with RME were analyzed. In 41 patients (23F, 18M) the RME was bonded on the maxillary deciduous second molars (E-RME group); in 40 patients (24F, 16M) the RME was bonded on the first permanent maxillary molars (6-RME group); in 45 patients (26F,19M) the RME was bonded on the first permanent maxillary molars with a removable mandibular Bite-Block (6-RME/BB group). Lateral cephalograms and dental casts were scanned and digitally measured before treatment (T1), at the appliance removal (T2) and at least 1 year after the appliance removal (T3). The comparison was made within the same group and between the groups. Statistical comparisons were assessed with analysis of variance multi-comparison test (*P = 0.05). A significant increase of upper molars buccal tipping was observed in 6-RME group when compared with E-RME and 6-RME/BB groups in the short-term (T2-T1) and long-term (T3-T1); a significant intercanine width increase was observed in E-RME group at the same times. No significant differences in dentoalveolar variables were observed comparing E-RME group versus 6-RME/BB group. The E-RME protocol allows for a greater skeletal expansion and produces a lower buccal tipping of the first permanent upper molars. The use of the BB in 6-RME/BB group shows a similar attitude to the E-RME protocol then can be considered an effective therapeutic alternative.

Morphological Study of Root Canals of Maxillary Molars by Cone-Beam Computed Tomography.

The aim of this study was to evaluate the root canal morphology of permanent maxillary molars by cone-beam computed tomography (CBCT) using the classifications of Weine et al. and Vertucci and to correlate the findings with sex, age, position in the dental arch, and prevalence of a second canal in the mesiobuccal root (MB2). A total of 414 scans were evaluated, corresponding to 1,000 teeth. The assessment consisted of coronal, axial, and sagittal reconstructions using i-CAT Workstation®. Type 0 was assigned when neither classification could be applied. The data were entered into an Excel spreadsheet and analyzed using SPSS. The chi-squared test or Fisher's exact test was used to compare the distribution of root canal morphology classified using the two systems. Analysis of the distribution of Weine types showed a predominance of type III in mesiobuccal roots, while type 0 predominated in distobuccal and palatal roots. Vertucci type IV predominated in mesiobuccal and distobuccal roots and type VII in palatal roots. There was no difference in the distribution of morphological canal types in permanent maxillary molars evaluated by CBCT according to sex, age group, or position in the dental arch of the patients. MB2 canals were identified in 68.4% of the teeth evaluated.

Intrusion of the maxillary posterior teeth with a single buccal mini-implant positioned bilaterally in young adults with a tendency towards hyperdivergence: A clinical study.

Skeletal anchorage systems have been used for intrusion of the posterior teeth with satisfactory results. To achieve this, mini-implants are placed at anatomically challenging sites such as the palate or require several mini-implants to produce the desired effect. To determine the magnitude of intrusion of the maxillary posterior teeth achieved on a continuous arch wire using a single buccal mini-implant placed bilaterally in young patients with a tendency towards hyperdivergence and to evaluate its influence on the skeletal, dental and soft-tissue structures. A total of 17 patients with proclination of the anterior teeth, tendency towards hyperdivergence and clockwise rotation of the mandible were selected. First premolars were extracted as part of treatment protocol. A 0.022-MBT bracket prescription was used. Mini-implants were placed bilaterally on the buccal aspect at the mucogingival junction or slightly gingival to it between the maxillary second premolar and first permanent molar. A total of 200 g of intrusive force was placed from a continuous 0.019 × 0.025 inch stainless-steel arch wire to the mini-implant by means of an elastomeric thread on both sides. Lateral cephalograms and study models were taken before the start of intrusion and six months later. Parametric and non-parametric tests were done to assess treatment results. Significant intrusion was observed in the maxillary molar and premolar region with tendency towards intrusion in the anterior region. There was significant decrease in lower anterior facial height (LAFH) with anti-clockwise mandibular rotation, decrease in facial proportion index and total facial height. No changes were observed in the transverse plane. Intrusion of the permanent maxillary molar can be achieved on a continuous arch wire with a single buccal mini-implant placed bilaterally with improvement in facial aesthetics, especially in the vertical plane. This method may be beneficial in patients with borderline vertical discrepancy treated with conventional friction mechanics during space closure after first premolar extractions.

Prevalence of C-shaped canal and related variations in maxillary and mandibular second molars in the Indian Subpopulation: A cone-beam computed tomography analysis.

The aim of this study was to evaluate the prevalence and anatomical configuration of the C-shaped canal in permanent maxillary and mandibular second molars in the Greater Noida population by compiling the results of data that used cone-beam computed tomography (CBCT) analysis. CBCT images were taken from the archive in the department of oral medicine and radiology taken for diagnostic purposes referred by other departments in the dental college. Five hundred CBCT records of patients, between the age group of 15-40 years, containing maxillary second molars and mandibular second molars were selected and reviewed. Statistical analysis was done using the Chi-square test to find out the most common configuration of the C-shaped canal between maxillary and mandibular second molars. Hundred and ten out of 500 patients had C-shaped canals (22%). Among them, 58 teeth (52.7%) were continuous C-shaped canals, 41 teeth (37.3%) were semicolon-shaped canals and 11 teeth (10%) had separated canals. (Chi-square test value = 8.26, P = 0.024). Statistically significant difference was found in configuration types. Among the jaw type, 62 maxillary second molar presented with C-shaped canal (25.1%) and 48 mandibular second molar presented with C-shaped canal (18.9%) (Chi-square test value = 3.87, P = 0.276). However, the difference was statistically insignificant in relation to the jaw type. Within the limitation of the study, we can conclude that the overall prevalence of C-shaped canals was 22% and the most common C-shaped canal configuration type was continuous (52.7%). However, no statistically significant difference was found in relation to jaw type.

USE OF TEMPORARY ANCHORAGE DEVICES IN INTRUSION OF SUPRAERUPTED MOLARS-CASE REPORTS

Early loss of mandibular permanent molars with supraeruption of maxillary permanent molars is a common clinical finding causing functional posterior occlusion problems. Rehabilitation of the stomatognathic system often requires preprosthodontic intervention with molar intrusion which is one of the most difficult movements in orthodontic mechanics requiring efficient anchorage to achieve success. The aim of this article was to present two case reports, with orthodontic mini-implants used for molar intrusion as preprosthetic treatment, reducing the need for prosthetic crown reduction in patients with edentulous space discrepancy. With the aid of chain elastics, the force of intrusion passing through the center of resistance of the tooth, supraerupted maxillary molars were intruded approximately 0.5mm per month. The intrusive tooth movement maintained the vitality of the intruded teeth and was not aggressive to the periodontal structures, did not cause root resorption and no change of the pulp flow was detected. In contrast to traditional orthodontics, mini-implants were demonstrated to be clinically efficient in providing sufficient anchorage against orthodontic forces. With these devices using well-controlled magnitude and direction of the force, we reestablished successfully the functional posterior occlusion. Through this case reports, we emphasize the versatility of orthodontic mini-implants as a form of temporary anchorage devices (TADs) in the biomechanics of molar intrusion attempted to create interocclusal space for adequate prosthodontic restoration with osseointegrated implants and prosthesis. Keywords: Temporary anchorage devices (TADs), Mini-implants, Molar intrusion, Edentulous space discrepancy, Preprosthodontic therapy.

Comparative evaluation of antimicrobial efficacy on Enterococcus faecalis and smear layer removal in curved canals by different irrigation techniques: An in vitro study.

Background:Various irrigation techniques have been proposed to improve the effectiveness of root canal debridement.Aims:The aim of the study was to compare the antimicrobial effect on Enterococcus faecalis and smear layer removal efficacy in curved canals by different irrigation techniques.Materials and Methods:Eighty extracted permanent maxillary molars with curved mesiobuccal roots were inoculated with E. faecalis. The tooth samples were then divided into four groups: Group A – EndoVac, Group B – Passive Ultrasonic Irrigation (PUI), Group C – Photodynamic Therapy (PDT), and Group D – Laser Irrigation with Photon-Induced Photoacoustic Streaming (PIPS). The percentage of bacterial reduction was calculated. The presence of smear layer from coronal, middle, and apical sections was evaluated through scanning electron microscopy.Statistical Analysis:Statistical analysis was performed using Kruskal–Wallis test. Intergroup comparison was made with Mann–Whitney U-test.Results:Although statistically insignificant, the irrigation techniques have shown considerable reduction in E. faecalis biofilm (P > 0.05). EndoVac, PUI, and PIPS have shown significantly higher efficacy in removing smear layer from apical third than PDT (P < 0.001).Conclusion:The newer PIPS technology can be used as an efficient tool in the decontamination of root canals. However, more clinical studies in this aspect are required to ensure more thorough debridement and disinfection of the root canal system.

Sex determination using mesiodistal width of permanent maxillary molar

Background: Teeth are valuable material for forensic investigations since they are the strong and stable human tissue that is resistant to physical damage. Sex determination, which is usually the first stage in the human identification process, is one of the essential criteria of biological identity. Objectives: To evaluate the potential of mesiodistal width of permanent maxillary molar in sex determination. Methods: This analytical cross-sectional study was done in 120 dental casts prepared for different dental treatment purposes in Tribhuvan University Teaching Hospital, Institute of Medicine, Maharajgunj, Kathmandu, Nepal from 5th October, 2021 to 5th November, 2021. Convenience sampling technique was used. The mesiodistal dimension of the permanent maxillary molar was measured with the help of a digital vernier caliper (Digimatic Eco, Precise, India). The data were entered in a Microsoft Excel sheet and analysed statistically using Statistical Package for Social Sciences Statistics Version 21. Results: The mean age of the patients was 21.05 ± 5.64 years. The mesiodistal dimension of maxillary first molar in males and females were not statistically significant on both the right and the left sides of the jaw. The sexual dimorphism percentage was 0.893% and 0.606% in right and left maxillary first molar respectively. Similarly, the frequency was 0.018 and 0.267 in right and left maxillary first molar respectively. Conclusion: Mesiodistal dimension of maxillary first molar did not significantly differ between the right and left sides of the jaw. This study could not establish sexual dimorphism among the right and left sides of the jaw.

An unusual case of maxillary permanent 1st molar with two pulp canals with pulp necrosis; diagnosis and endodontic management.

The present case report highlights the need to identify variations in root canal anatomy as a prerequisite for effective nonsurgical root canal therapy planning. As clinicians, we need to develop our observational and clinical abilities as well as amend our understanding of the complexities of the canal anatomy. Reports describing the structure of teeth and pulp canals rarely report the presence of two pulp canals in two permanent upper 1st molars. In this case, it describes the nonsurgical root canal therapy of the upper right 1st permanent molar with two pulp canals, which was confirmed by a cone beam.

Survey on the occlussal morphology of the permanent maxillary molars in a sample of Egyptian Population

Background:The study of dental morphological characteristics is useful for providing information for phylogenic, anthropological, forensic and genetic studies and understanding variations within and among species.The aim of the study was to investigate, compare and document the distinctive cuspal outlines and groove patterns of permanent maxillary molars in a sample of Egyptian population, this was performed morphologically through study casts inspection, followed by statistical analysis of the collected data. Materials and Methods: 50 upper study casts models of patients aged above 21 years from the Orthodontic Department of Faculty of Dentistry at Ain Shams University with all maxillary molars teeth present were collected. Results: Regarding cusp number and groove pattern of maxillary molars, M1 showed prevalence of 4H groove pattern while 3 cusps and U groove pattern was the most common pattern for M2&M3.Regarding the frequency of molar tubercle (tubercle of carabelli), M1 showed prevalence of type I molar tubercle(depression), while the absence of the molar tubercle was the most common pattern for M2 &M3.Occlusal outline of M1 showed prevalence of the rhomboidal outline while M3 showed prevalence of triangle outline. Statistical results showed significant difference between the maxillary molars.Conclusions: The morphological characteristics of teeth in a sample of Egyptian population were consistent with those of other studies performed on different populations using similar methodology.

Root Canal Configuration of the Maxillary Second Permanent Molars in Pakistani Subpopulation

OBJECTIVE: The aim of the study is to assess the variations in the root canal configuration of maxillary second permanent molars in the Pakistani subpopulation by using different clinical aids in vivo. METHODOLOGY: The Cross-sectional analytical study was conducted from April to October 2018 at the College of Dentistry, Riphah International University, Pakistan. The root canal configurations of Maxillary second molars were evaluated in 95 adult patients that presented to the Operative Department, after obtaining consent. After access cavity preparation the orifices were identified and cross checked using 2.5x magnification and different clinical tests. Data analysis was done by utilizing SPSS version 23. RESULTS: Out of the 95 teeth 6(6.3%) teeth had a single canal, 7(7.4%) teeth had two canals, 58(61.1%) teeth had three canals and 24(25.3%) teeth had four canals. Age-wise analysis of the frequency of different canals showed that prevalence of molars with three canals was significantly higher in the subjects with age between 41 and 50 years. Conclusion: Overall, the study noted four morphological variations in the root canal configuration of Maxillary second molar teeth in Pakistani subpopulation. Hence, while executing the endodontic treatment in the maxillary second molars a thorough assessment of the root canal system should be carried out. The results of the study can guide Pakistani dentists. KEYWORDS: Permanent Maxillary second molar, Dental Morphology, Endodontics, Pakistan

Ectopic Eruption of the First Permanent Molar in the Maxilla: Cephalometric Features of 13 Pediatric Patients

Ectopic eruption of the first permanent molar in the maxilla, generally characterized by the wrong axial positioning during eruption, is reported to occur in about 2–6% of children. Its incidence is surely under-estimated as it frequently remains undiagnosed and, additionally, becomes irreversible, resulting in posterior crowding in such cases. This retrospective study aims to investigate the cephalometric features of patients affected by ectopic eruption of the maxillary first molar in comparison to a control group of patients. From a total of 1935 subjects, 13 patients were enrolled in the study group, while 26 patients were randomly selected as a control group. Lateral cephalometric teleradiographs obtained at the time of diagnosis were used to measure cephalometric values between study patients and controls. The prevalence of ectopic eruption of the first maxillary permanent molar in our patients was 1.14%. The mandibular angle (SN-GoMe) was found to be significantly greater in the study group than in control. The same statistical trend was observed for the inter-maxillary angle (SnaSnp-GoMe); also, the distance Sna-Me was greater in the study group. Differences between groups were statistically significant for the following distances: Snp-Sna, Ba-S and SOR-Sna, which were found to be, overall, greater in the study group. Ectopic eruption of the first permanent molar in the maxilla seems to be associated with morphogenetic characteristics of patients, mainly with a dolichocephalic pattern.