Alveolar Bone Dimensions of Mandibular Posterior Teeth using Cone Beam Computed Tomography: A Pilot Study (original) (raw)
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CBCT Analysis of Alveolar Bone Dimensions in Mandibular Posterior Teeth: A Preliminary Study
INDIAN JOURNAL OF APPLIED RESEARCH, 2019
OBJECTIVES: Extraction of mandibular posterior teeth followed by immediate implant placement is considered as an optimal technique of immediate prosthetic rehabilitation. The analysis of alveolar bone dimensions with Cone Beam Computerized Tomography prior to implant placement is a prime determinant in treatment planning. Hence this preliminary study was conducted to analyze the alveolar bone dimensions in dentate mandibular posterior teeth to evaluate the available bone which can be utilized for immediate implant placements. MATERIALS AND METHODS: Retrospective data of 200 cases of full volume CBCT was procured from Riyadh Elm University (REU) database and reviewed for eligibility. Atotal of 10 cases were included in the study. Scans were assessed for thickness of buccal and lingual walls at 4mm below the CEJ (MP1) and at midroot level (MP2). Alveolar width was assessed at most coronal point on alveolar bone (BW1) and at superior border of mandibular canal (BW2). The height was be ...
International Dental Research
Aim: The objective of this study is to evaluate the morphology of the alveolar bone in the posterior mandibular region and its relationship with age and sex. Methodology: In the present study, the reports of 500 patients over 18 years of age who were admitted to our faculty with an existing second premolar and missing first molar and who underwent cone-beam computed tomography (CBCT) imaging were randomly selected and retrospectively evaluated. In the study, alveolar crest types, the buccolingual width of the alveolar crest, crest height, lingual concavity depth, and lingual concavity angle were measured. Results: U-type crest was detected in 47.8% of 500 individuals evaluated using CBCT. The mean depth of the lingual concavities was 2.36 ± 1.11 mm, and the mean angle of the lingual concavities was 61.09 ± 11.33°. No statistically significant relationship was found between age and alveolar crest width, alveolar crest height, lingual concavity depth, and lingual concavity angle. No s...
Imaging Science in Dentistry
Purpose: This study aimed to introduce a novel method to evaluate the alveolar bone and interdental septum in the anterior mandible using cone-beam computed tomography (CBCT). Materials and Methods: Fifty-six CBCT scans from adult patients were selected. The CBCT scans were obtained before and after orthodontic treatment. The following measurements were taken: width of the alveolar bone and the interdental septum, height of the interdental septum, height of the bone plates, distance between the cementoenamel junction and marginal bone crests, and vertical positioning of the mandibular incisor, using the lingual plane as a reference. To test the reproducibility and the stability of the lingual plane, a triangle was traced in the anterior mandible. The intra-class correlation coefficient (ICC) was used to determine intra-and inter-examiner agreement. The paired Student t-test was used to evaluate the area of the triangle and the reproducibility of all measurements. Results: The ICC was excellent for the alveolar bone and dental measurements (0.9989 and 0.9977, respectively), as well as for the interdental septum (0.9987 and 0.9961, respectively). The area of the triangles showed stability in the lingual plane (P>0.05). For the alveolar bone, mandibular incisor, and interdental septum measurements, no statistically significant differences were found between the 2 examiners (P>0.05), confirming the technical reliability of the measurements. Conclusion: The method used in this study provides a valid and reproducible assessment of alveolar bone dimensions in the anterior mandible measured on CBCT images.
Nepal Medical College Journal
Cone beam computed tomography (CBCT) can be used for determining the height and width of alveolar bone surrounding the implant site which are important factors in implant planning. This study was done to evaluate and compare alveolar bone height and width in maxillary anterior teeth based on CBCT images from Nepalese population. This retrospective study included patients who had done CBCT scan between January 2019 to December 2020. Sagittal section views perpendicular to alveolar ridge were taken in the middle of maxillary left and right central incisor, lateral incisor, and canine regions and the linear measurements were done to measure alveolar height (between floor of nasal fossa and alveolar crest) and width (between buccal and palatal cortical plate). The result revealed no significant difference in alveolar height among maxillary anterior teeth. Mean alveolar width for maxillary right central incisor (11), lateral incisor (12), and canine (13) were 12.09 ± 2.36, 8.27 ± 1.37 an...
CBCT assessment of bone thickness in maxillary and mandibular teeth: an anatomic study
Journal of Applied Oral Science
CBCT assessment of bone thickness in maxillary and mandibular teeth: an anatomic study The site of the sinus tract depends on the rate of resistance against abscess exudate drainage, bone morphology, and distance from the root apex to the outer cortical bone. Objective: To assess apical bone thickness in buccal and palatal/lingual aspects of maxillary and mandibular teeth, using a high-resolution cone-beam computed tomography (CBCT) system. Methodology: In total, 422 CBCT examinations were included in the study, resulting in a sample of 1400 teeth. The scans were acquired by PreXion 3D, with a high-resolution protocol. The bone thickness was taken as the distance between the center of the apical foramen and the buccal and lingual/palatal cortical bone. The quantitative variables were expressed as mean values±standard deviation. The independent samples were analyzed using the t-test or the Mann-Whitney test (p<0.05). Results: The lowest mean value of bone thickness was observed in the buccal cortical bone of the upper canines (1.49 mm±0.86) and in the upper central incisors (1.59 mm±0.67). In premolar teeth, the lowest values were found in the buccal cortical bone of upper first premolars (1.13 mm±0.68). In the posterior teeth, the lowest values were found in the buccal cortical bone of upper first molars (1.98 mm±1.33). In the lower second molar region, the buccal cortical bone (8.36 mm±1.84) was thicker than the lingual cortical bone (2.95 mm±1.16) (p<0.05). Conclusions: The lowest mean values of bone thickness are in the buccal cortical bone of the maxillary teeth. In the mandible, bone thickness is thinner in the buccal bone around the anterior and premolar teeth, and in the lingual aspect of mandibular molars. All these anatomic characteristics could make the occurrence of the sinus tract more susceptible in these specific regions of the maxillary and mandibular alveolar bone.
Frontiers in Dentistry, 2019
Objectives: This study sought to assess the thickness of buccal and lingual alveolar bone plates according to the position of impacted mandibular third molars on cone-beam computed tomography (CBCT) scans. Materials and Methods: Eighty-four CBCT scans of impacted mandibular third molars were evaluated in this retrospective study. All images had been obtained by ProMax 3D CBCT system with the exposure settings of 78 kVp, 12 mA, 16 s time, 0.2 mm voxel size and 10 × 9 cm field of view. The impaction angle of teeth and the thickness of buccal and lingual cortical plates were determined on images by drawing lines in the anterior, middle, posterior, superior, central and inferior regions. Thickness of bone plates was analyzed according to the position of impacted molars relative to the buccal and lingual plates using the Student t-test and relative to the second molars using one-way ANOVA and Tukey’s test. Results: In the buccolingual direction, the buccal plate thickness was maximum in ...
Journal of Indian Society of Periodontology, 2020
The purpose of this study was to evaluate the buccal and lingual alveolar bone thickness and buccolingual inclination of maxillary posterior teeth in patients with severe skeletal Class III malocclusion with and without mandibular asymmetry and compare with those in patients with skeletal Class I malocclusion. Methods: Cone-beam computed tomography images of 69 patients with severe skeletal Class III malocclusion and 30 patients with skeletal Class I malocclusion were collected and reconstructed with Dolphin 3D software. Based on the distance from menton to the sagittal plane (d), the patients with skeletal Class III malocclusion were divided into a symmetry group (d # 2 mm) and an asymmetry group (d $ 4 mm). Buccal and lingual alveolar bone thickness and buccolingual inclination of maxillary posterior teeth were measured and compared. Correlations among dental measurements, severity of sagittal discrepancy, and mandibular deviation were analyzed. Results: Maxillary posterior teeth on the deviated side in Class III asymmetry group and symmetry group were buccally inclined compared with the Class I group (P \ 0.001). A significant negative correlation was noted between buccolingual inclination of maxillary posterior teeth and ANB value with Spearman correlation coefficient of maxillary first molar, second premolar, and first premolar of-0.687,-0.485 and-0.506, respectively (P \ 0.001). Maxillary first molar showed thinner buccal alveolar bone on deviated side in asymmetry group and symmetry group of Class III, compared with the Class I group, with average values of 1.21 mm, 1.19 mm, and 1.83 mm, respectively (P \0.05). The maxillary first premolar also showed thinner buccal alveolar bone on deviated side in Class III asymmetry group compared with the Class I group, with average values of 0.87 mm and 1.28 mm, respectively (P \ 0.05). Conclusions: Decompensation of buccally inclined posterior teeth in patients with skeletal Class III malocclusion should be more cautious owing to thinner buccal alveolar bone to avoid a high risk of fenestration and dehiscence. (Am J Orthod Dentofacial Orthop 2020;157:503-15) S keletal Class III malocclusion is a kind of maxillofacial deformity with high prevalence in Asian populations, displaying sagittal discrepancy between maxilla and mandible. 1-3 Facial asymmetry happens more frequently in patients with skeletal Class III malocclusion with overdeveloped mandible. 4-7 Patients with skeletal Class III malocclusion with mandibular asymmetry have both sagittal and transverse skeletal discrepancies, leading to a great challenge to orthodontists. Patients with severe skeletal Class III malocclusion with or without mandibular asymmetry usually require orthognathic surgery to normalize skeletal deformity,
World Journal of Dentistry
Aim and objective: The study aims to compare the alveolar bone thickness in the lower incisors area in skeletal class I average growing adults with two different growth patterns of class II adults using cone-beam computed tomography (CBCT) imaging technique. Materials and methods: The CBCT images of 20 class II and 10 class I average growth pattern patients were examined. Class II patients were subdivided into high-and low-angle groups of 10 patients each. The alveolar bone thickness of mandibular incisors in the buccal and lingual region was measured at the level of the alveolar crest and 3, 6, and 9 mm from the alveolar crest. Results: Buccal and lingual alveolar bone thickness in class II high-and low-angle patients was not significantly different at all levels except at 3 and 9 mm apical levels where lingual bone shows more thickness than buccal. Class II high-angle group showed thinner alveolar bone than low-angle and class I average groups, in most areas. Conclusion: Skeletal class II subjects with hyperdivergent growth patterns showed thinner mandibular alveolar bone in most areas compared with average/low-angle subjects. In class I average growing patients, the lingual alveolar bone is thicker in all sites. In class II high-angle patients, most sites exhibit thicker lingual bone thickness. In class II low-angle cases, all sites have a greater buccal bone thickness. Clinical significance: The anatomic limit set by the alveolar cortical bone should be considered during treatment planning during the sagittal correction, retraction of teeth, and miniscrew insertion. It is important to consider these boundaries as a limit to reposition teeth. Considering the anatomy of the alveolus is one of the keys to minimize unfavorable sequelae.
Romanian journal of …, 2010
New radiographic maxillofacial techniques, cone beam computerized tomography (CBCT) are a necessity in the assessment of jaw bone offer to effectively evaluate the treatment. Aim: To quantitatively and qualitatively evaluate anterior mandibular area on CBCT comparing to orthopantomography (OPG). Material and Methods: Fifty-one dental patients, aged between 20 and 77 years, were quantitatively analyzed and 81 dental patients, aged between 20 and 79 years, were qualitatively analyzed. ANOVA and Mann-Whitney tests were used for statistical analyses. Results: Strong statistical significant differences were recorded between CBCT and OPG assessments for all groups of teeth (p<0.001), when evaluation was performed on distances to mandibular base. When assessing the distance to the incisive canal, the differences were recorded only for the left canine zone. Mean densities of central incisor, lateral incisor and canine regions, were 1,400-1,425 HU, 1,212-1,224 HU, and 1,150-1,175 HU, respectively. There was a marginal statistical evidence that bone density was lower in canine zone comparing to central incisor area (p=0.08). Conclusions: Measurements on CBCT are more accurate when compared with OPG. Bone density of central incisor region is higher. Therefore, CBCT permits the clinician to have all necessary information when planning dental implants.
2020
In recent years, dental implant has become a common treatment option with its high success rate. Nowadays, a certain number of dental implants are placed in patients every year with tolerable complications (1). For healthy maintenance of dental implants, patients should have a sufficient amount of and appropriate bone. However, as is known, a reduction occurs in residual bone dimension following remodeling after tooth extraction (2). Alveolar crest resorption after tooth extraction is usually observed in the horizontal plane and on the facial side. Meanwhile, a decrease in the height of alveolar crest is also observed. During this resorption process, the crests are repositioned to a more lingual position. The residual crest undergoes atrophy more rapidly in the first 6 months, which continues at a slower rate throughout life. Morphological changes in crest after tooth extraction were evaluated by cephalometric measurements, study models, radiographic analyses and direct measurements...