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Han SA, Kim S, Seo Y, Yang SK, Rhee CS, Han DH. Dental implant as a potential risk factor for maxillary sinus fungus ball. Sci Rep 2024; 14:2483. [PMID: 38291074 PMCID: PMC10827791 DOI: 10.1038/s41598-024-52661-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 01/22/2024] [Indexed: 02/01/2024] Open
Abstract
Fungus ball is the most common form of non-invasive fungal sinusitis, and maxillary sinus is the most commonly involved site. Maxillary sinus fungus ball (MFB) accounts for a considerable proportion of unilateral maxillary sinusitis. The prevalence of MFB has recently increased; however, its contributing factors are unclear. This study analyzed the association between MFB and dental implants. One hundred one patients who underwent unilateral maxillary sinus surgery were divided into two groups based on surgical biopsy results: unilateral bacterial sinusitis (UBS, n = 45) and MFB (n = 56). Stratified random sampling of 30 patients from each group was performed to adjust for age. The number of dental implants on maxillary teeth and degree of penetration into the maxillary sinus was radiologically evaluated. The number of patients with dental implants was greater (P = 0.085) and the number of implants was significantly higher (P = 0.031) in the MFB group. Dental implant can be a potential risk factor for MFB development. Therefore, dental implant surgeons should take caution in penetrating the maxillary sinus floor during implant insertion and otolaryngologists should consider the possibility of fungus ball when assessing patients with sinusitis who have dental implants.
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Affiliation(s)
- Sun A Han
- Department of Otorhinolaryngology-Head and Neck Surgery, Hallym University Dongtan Sacred Heart Hospital, Hwaseong-si, Republic of Korea
| | - Sungtae Kim
- Department of Periodontology, Dental Research Institute, Seoul National University School of Dentistry, Seoul, Republic of Korea
| | - Yuju Seo
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University College of Medicine, Daehakro 101, Jongno-gu, Seoul, Republic of Korea
| | - Seung Koo Yang
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University College of Medicine, Daehakro 101, Jongno-gu, Seoul, Republic of Korea
| | - Chae-Seo Rhee
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University College of Medicine, Daehakro 101, Jongno-gu, Seoul, Republic of Korea
- Graduate School of Immunology, Seoul National University College of Medicine, Seoul, Republic of Korea
- Institute of Allergy and Clinical Immunology and Sensory Organ Research Institute, Seoul National University Biomedical Research Center, Seoul, Republic of Korea
- Sensory Organ Research Institute, Seoul National University Biomedical Research Center, Seoul, Republic of Korea
| | - Doo Hee Han
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University College of Medicine, Daehakro 101, Jongno-gu, Seoul, Republic of Korea.
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Three-Dimensional Analysis of Alveolar Bone Morphological Characteristics in Skeletal Class II Open Bite Malocclusion: A Cone-Beam Computed Tomography Study. Diagnostics (Basel) 2022; 13:diagnostics13010039. [PMID: 36611329 PMCID: PMC9818805 DOI: 10.3390/diagnostics13010039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 12/17/2022] [Accepted: 12/21/2022] [Indexed: 12/24/2022] Open
Abstract
This cross-sectional research evaluated the morphological characteristics of alveolar bone in skeletal class II open-bite individuals compared to skeletal class II and class I non-open-bite individuals. A sample of 82 patients (all were in cervical vertebral stage 6) was divided into three groups (class II OB group, n = 29; class II NOB group, n = 29; class I NOB group, n = 24) according to bilateral molar relationship, ANB angle, and anterior overbite measured by cephalometric analysis. The evaluation was performed with specialized software (Mimics 21.0) and initial cone-beam computed tomography (CBCT) data. The alveolar bone height and thickness of the whole dentition area and alveolar crest level and root apex position of the incisors were measured with a series of appropriate CBCT images. One-way analysis of variance followed by the Tukey post hoc test and the Kruskall−Wallis test were performed for statistical comparisons. The class II open-bite group had increased alveolar bone height for the maxillary first molar and decreased alveolar bone height for mandibular molars compared to the class II non-open-bite group (p < 0.05 for both). Furthermore, there were significant negative correlations between the alveolar bone heights of the upper first and second molars (A6-height, A7-height) and overbite (both p < 0.01). The alveolar thicknesses of all measured teeth were generally reduced in the class II OB group.
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Maxillary Sinus Dimensions in Skeletal Class I Chinese Population with Different Vertical Skeletal Patterns: A Cone-Beam Computed Tomography Study. Diagnostics (Basel) 2022; 12:diagnostics12123144. [PMID: 36553151 PMCID: PMC9777021 DOI: 10.3390/diagnostics12123144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 12/07/2022] [Accepted: 12/11/2022] [Indexed: 12/14/2022] Open
Abstract
Due to the close relationship between the maxillary posterior teeth roots and the maxillary sinus floor, the maxillary sinus can significantly impact various dental treatments, including endodontic procedures and surgical apicectomy, periodontal flap surgery, surgical tooth extraction, dental implantation, and orthognathic surgeries. Specifically, in orthodontics, the location of the maxillary sinus floor may affect tooth movement and insertion of temporary anchorage devices (TADs). This study aims to evaluate the dimensions and location of the maxillary sinus in the Chinese orthodontic patient population with skeletal class I. Using cone-beam computed tomography (CBCT), the volumetric size, height, width, and depth of the sinus and the amount of alveolar bone below the sinus floor and buccal/palatal to the sinus wall were compared between patients of different genders and different vertical skeletal patterns. Unlike the previously reported skeletal class II population, the skeletal class I patients with different vertical patterns do not have significantly different size sinuses. On the other hand, males have larger maxillary sinuses in all parameters than females in the testing population. In addition, no significant correlation was noticed between the SN-MP angle and sinus dimensions or between the ANB angle and sinus dimensions. Nevertheless, the distance from the sinus floor to the alveolar bone crest is not correlated with skeletally sagittal or vertical parameters in females but negatively correlated with the skeletal sagittal parameter in males. In summary, different from the skeletal class II population, there is no significant difference in maxillary sinus size and location among different vertical skeletal patterns in the skeletal class I population. Compared to the skeletal class II population, a higher percentage of the skeletal class I population has an alveolar bone with less than 5 mm thickness, representing a narrowed safe zone of TADs placements.
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Awad NK, Marghalani HYA, Barayan MA, Alsaggaf DH, Alsulaimani FF. Maxillary Sinus Volume in Patients with Canted Occlusal Plane: A
Cone‐Beam
Computed Tomography Study. Orthod Craniofac Res 2022; 26:231-238. [PMID: 36047687 DOI: 10.1111/ocr.12605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 06/04/2022] [Accepted: 08/04/2022] [Indexed: 12/01/2022]
Abstract
OBJECTIVES To compare the maxillary sinus volume between both sides in adult patients with upper occlusal canting (>2 mm cant) and a control group (≤2 mm cant) using cone-beam computed tomography scans. MATERIALS AND METHODS This retrospective study included a total of 84 scans (42 scans per group) according to predetermined selection criteria. OnDemand 3-D™ software was used for volumetric and linear measurements of the maxillary sinus. Maxillary occlusal canting was determined at the level of the maxillary first molars. It was defined as the vertical difference between right and left sides relative to the Frankfort horizontal plane. Non-parametric tests were applied. RESULTS The median difference in the maxillary sinus volume between the sides was statistically significant between the control and cant groups (P < 0.001). Also, the median difference in the maxillary sinus craniocaudal height and apex sinus distance between the sides was statistically significant between the control and cant groups (P < 0.05 and P < 0.001, respectively). CONCLUSION In adult patients, maxillary occlusal canting of more than 2 mm was associated with asymmetric maxillary sinus volumes. In the cant group, maxillary first molars on the canted-down side were in close proximity to the sinus floor, which suggests a limited leeway for molar intrusion.
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Affiliation(s)
| | - Hussain YA Marghalani
- Orthodontic Department, Faculty of Dentistry King Abdulaziz University Jeddah Saudi Arabia
| | - Mohammed A. Barayan
- Oral Basic Science, Oral and Maxillofacial Radiology Department, Faculty of Dentistry King Abdulaziz University Jeddah Saudi Arabia
| | - Doaa H. Alsaggaf
- Orthodontic Department, Faculty of Dentistry King Abdulaziz University Jeddah Saudi Arabia
| | - Fahad F. Alsulaimani
- Orthodontic Department, Faculty of Dentistry King Abdulaziz University Jeddah Saudi Arabia
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Syverson A, Li C, Zheng Z, Proskurnin E, Chung CH, Zou M. Maxillary sinus dimensions in skeletal class II population with different vertical skeletal patterns. Clin Oral Investig 2022; 26:5045-5060. [PMID: 35359186 DOI: 10.1007/s00784-022-04476-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 03/28/2022] [Indexed: 11/26/2022]
Abstract
OBJECTIVES The location of the maxillary sinus significantly affects the orthodontic treatment, particularly when temporary anchorage devices (TADs) are taking place. The current study aims to evaluate the maxillary sinus size and location in a skeletal class II population. MATERIALS AND METHODS The pre-orthodontic treatment CBCT images of the skeletal class II population were selected. The sinus's volumetric size, height, width, and depth were measured and compared among different skeletal vertical patterns and between genders. In addition, the height and width of the alveolar bone surrounding the maxillary sinus floor were quantified in the same manner. RESULTS Patients who displayed a high-angle skeletal pattern had significantly greater maxillary sinus dimensions, shorter vertical distance between the maxillary sinus floor and the alveolar bone crest, and thinner alveolar bone surrounding the maxillary sinus. Meanwhile, the maxillary sinus dimension measurements were positively correlated with the SN-MP angle in both genders but only correlated with ANB angle in females. On the other hand, the vertical distance between the maxillary sinus floor and the alveolar bone crest was negatively correlated with the SN-MP angle in males but the ANB angle in females. CONCLUSIONS In the skeletal class II population, the high-angle patients faced a higher risk of maxillary sinus perforations by TADs. In addition, gender-related variations were noticed warranting clinical attention, as males have a higher potential for maxillary sinus penetration from TAD placement than females. CLINICAL RELEVANCE Maxillary posterior alveolar TADs are often prescribed to achieve the distalization of maxillary posterior teeth in class II patients. The current study provided more insight into the "safe zone" for TAD placement related to the maxillary sinus.
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Affiliation(s)
- Abby Syverson
- Department of Orthodontics, School of Dental Medicine, University of Pennsylvania, 240 S 40th St, Philadelphia, PA, 19104, USA
| | - Chenshuang Li
- Department of Orthodontics, School of Dental Medicine, University of Pennsylvania, 240 S 40th St, Philadelphia, PA, 19104, USA.
| | - Zhong Zheng
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Evgenii Proskurnin
- School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Chun-Hsi Chung
- Department of Orthodontics, School of Dental Medicine, University of Pennsylvania, 240 S 40th St, Philadelphia, PA, 19104, USA
| | - Min Zou
- Key Laboratory of Shannxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, 98 XiWu Road, Xi'an, 710004, China.
- Clinical Research Center of Shannxi Province for Dental and Maxillofacial Diseases, College of Stomatology, Xi'an Jiaotong University, 98 XiWu Road, Xi'an, 710004, China.
- Department of Orthodontics, College of Stomatology, Xi'an Jiaotong University, 98 XiWu Road, Xi'an, 710004, China.
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Talens-Cogollos L, Vela-Hernández A, Peiró-Guijarro MA, García-Sanz V, Montiel-Company JM, Gandía-Franco JL, Bellot-Arcís C, Paredes-Gallardo V. Unplanned molar intrusion after Invisalign treatment. Am J Orthod Dentofacial Orthop 2022; 162:451-458. [DOI: 10.1016/j.ajodo.2021.03.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 03/01/2021] [Accepted: 03/01/2021] [Indexed: 11/01/2022]
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Puciło M, Puciło A, Safranow K, Nowicka A. The influence of age, sex, and tooth type on the anatomical relationship between tooth roots and the mandibular canal. Imaging Sci Dent 2022; 51:373-382. [PMID: 34987997 PMCID: PMC8695473 DOI: 10.5624/isd.20210031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Revised: 05/20/2021] [Accepted: 05/28/2021] [Indexed: 11/18/2022] Open
Abstract
Purpose Cone-beam computed tomography (CBCT) reconstructions were analysed to elucidate factors affecting the anatomical relationship between tooth roots and the mandibular canal(MC). Materials and Methods Images of 300 volumetric tomography scans of patients aged between 20 and 79 years old (167 women and 133 men) were analysed. The mean distances between 2,053 dental root apices and the internal border of the MC were obtained by measuring the horizontal and vertical distances on coronal CBCT images. The actual distance was then calculated mathematically with the Pythagorean formula. The statistical significance of differences between men and women was assessed using the Mann-Whitney test. Correlations with patient age were evaluated with the Spearman rank correlation coefficient. Results The mean distances ranged from 2.17 mm, for single right third molar roots in women, to 8.02 mm for single left third molar mesiolingual roots in men. The mean distances measured for the mandibular right second molar mesial roots and the right second premolar roots were larger in men than in women. Age showed a significant positive correlation with the measured distances for mesial and distal roots of the first and second molar on both sides and the right third molar, mesiolingual roots of the left third molar, and single roots of the right third molar. Conclusion The root-to-mandibular canal distance depended on age and the type of tooth. In 2 root types, this distance was impacted by sex.
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Affiliation(s)
| | - Aleksandra Puciło
- Faculty of Medicine and Dentistry, Pomeranian Medical University, Szczecin, Poland
| | - Krzysztof Safranow
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Szczecin, Poland
| | - Alicja Nowicka
- Department of Conservative Dentistry and Endodontics, Pomeranian Medical University, Szczecin, Poland
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Shrestha B, Shrestha R, Lu H, Mai Z, Chen L, Chen Z, Ai H. Relationship of the maxillary posterior teeth and maxillary sinus floor in different skeletal growth patterns: A cone-beam computed tomographic study of 1600 roots. Imaging Sci Dent 2022; 52:19-25. [PMID: 35387101 PMCID: PMC8967499 DOI: 10.5624/isd.20210145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 10/14/2021] [Accepted: 10/18/2021] [Indexed: 11/18/2022] Open
Abstract
Purpose This study evaluated the distance from the posterior root apices to the maxillary sinus floor (MSF) and the frequency of roots touching or protruding through the MSF using cone-beam computed tomography (CBCT). Materials and Methods This study included 100 subjects divided into different vertical and anteroposterior skeletal growth patterns. On CBCT images, the distance from the posterior root apices to MSF was measured and the frequency of roots touching or protruding through the MSF was evaluated using NNT software (version 5.3.0.0; ImageWorks, Elmsford, NY, USA). Results No statistically significant differences were found in the distance from the posterior root apices to the MSF among vertical skeletal groups (P>0.05). The palatal roots of the first molar and the palatal, mesio-buccal and disto-buccal roots of the second molars had significantly less distance from MSF in skeletal class II than in class III (P<0.05). The high-angle group had the highest frequencies of roots touching or protruding into the maxillary sinus (49.8%); the lowest proportion of these roots was found in skeletal class III (28.3%) and the highest proportion in class II (50.3%). Males had shorter distances from the posterior root apices to the MSF and higher frequencies of roots protruding through or touching the MSF than females. Conclusion Anteroposterior skeletal growth patterns and sex affected the distances from the maxillary posterior roots to the MSF. The frequency of roots protruding into or touching the sinus was affected by both vertical and anteroposterior skeletal groups and sex. These findings have implications for dental practice.
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Affiliation(s)
- Biken Shrestha
- Department of Stomatology, the Third Affiliated Hospital of Stomatology, Sun Yat-sen University, Guangzhou, PR China
| | - Rachana Shrestha
- Department of Implant Dentistry, Guanghua Hospital of Stomatology, Sun Yat-sen University, Guangzhou, PR China
| | - Hongfei Lu
- Department of Stomatology, the Third Affiliated Hospital of Stomatology, Sun Yat-sen University, Guangzhou, PR China
| | - Zhihui Mai
- Department of Stomatology, the Third Affiliated Hospital of Stomatology, Sun Yat-sen University, Guangzhou, PR China
| | - Lin Chen
- Department of Stomatology, the Third Affiliated Hospital of Stomatology, Sun Yat-sen University, Guangzhou, PR China
| | - Zheng Chen
- Department of Stomatology, the Third Affiliated Hospital of Stomatology, Sun Yat-sen University, Guangzhou, PR China
| | - Hong Ai
- Department of Stomatology, the Third Affiliated Hospital of Stomatology, Sun Yat-sen University, Guangzhou, PR China
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The anatomical relationship between the roots of erupted permanent teeth and the mandibular canal: a systematic review. Surg Radiol Anat 2020; 42:529-542. [PMID: 31900577 DOI: 10.1007/s00276-019-02404-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Accepted: 12/17/2019] [Indexed: 01/04/2023]
Abstract
PURPOSE This study reviewed the literature on the position of the mandibular canal (MC) relative to the root apices (RA) of neighbouring teeth using cone beam computed tomography (CBCT). METHODS The authors searched the PubMed, Scopus, EBSCO Dentistry and Oral Sciences Source, Cochrane and Lilacs databases for relevant English-language articles with no year limitations published through January 25, 2018. RESULTS The search identified 888 articles, 12 of which met the inclusion criteria. Three groups were found based on the measuring method: the shortest distance from the RA to the MC, the vertical distance from the RA to the MC, or the distance from the RA to the superior cortical bone of the MC. In the first and second groups, the shortest distances to the canines, first premolars, second premolars, first molars, second molars, and third molars were 3.8 mm, 4.76 mm, 1.65 mm, 1.23 mm, 0.64 mm, and 1.28 mm, respectively. In the third group, the shortest distances to the second premolars, first molars, and second molars were 2.71 mm, 3.82 mm, and 1.4 mm, respectively. CONCLUSIONS The distance from the MC to the RA was generally shorter in females and younger people, with decreasing distances in patients over 60 years old, and depended on the tooth type. TRIAL REGISTRATION The protocol for this systematic review was registered on PROSPERO (CRD42018085478).
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Son WS, Kim YI, Kim SS, Park SB, Kim SH. Anatomical relationship between the maxillary posterior teeth and the sinus floor according to an anterior overbite. Orthod Craniofac Res 2019; 23:160-165. [PMID: 31650685 DOI: 10.1111/ocr.12354] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 09/17/2019] [Accepted: 10/23/2019] [Indexed: 12/01/2022]
Abstract
OBJECTIVE To evaluate the vertical relationship between the maxillary sinus floor (MSF) and the maxillary posterior teeth (MPT) according to an anterior overbite. SETTINGS AND SAMPLE POPULATION The patients were divided into three groups according to an anterior overbite. The open bite group (OBG) included patients with an anterior overbite of ≤0 mm, the normal overbite group (NBG) included patients with an overbite of 0-3 mm, and the deep bite group (DBG) included patients with an overbite ≥3 mm. Thirty patients were randomly matched into each group based on age and sex. MATERIALS AND METHODS The distances and vertical relationship between the MSF and the MPT was analysed using cone-beam computer tomography. The vertical relationship between the two was classified as either favourable or unfavourable for the intrusion of the posterior teeth. RESULTS A higher ratio of patients in the OBG had MPT positioned close to the MSF than the DBG. Intrusion of the posterior teeth was unfavourable for an average of 87.2%, 77.2% and 70.2% molars in the OBG, NBG and DBG, respectively. CONCLUSIONS The vertical distance between the MSF and the MPT is associated with an anterior overbite. The posterior teeth were in an unfavourable position for the orthodontic intrusion in the OBG as compared to the other groups. Additional caution is needed when planning orthodontic intrusion treatment for patients with an anterior open bite. But, there were some individual variations within each group.
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Affiliation(s)
- Woo-Sung Son
- Department of Orthodontics, Pusan National University Dental Hospital, Yangsan, South Korea
| | - Yong-Il Kim
- Department of Orthodontics, Pusan National University Dental Hospital, Yangsan, South Korea
| | - Seong-Sik Kim
- Department of Orthodontics, Pusan National University Dental Hospital, Yangsan, South Korea
| | - Soo-Byung Park
- Department of Orthodontics, Pusan National University Dental Hospital, Yangsan, South Korea
| | - Sung-Hun Kim
- Department of Orthodontics, Pusan National University Dental Hospital, Yangsan, South Korea
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Uğur Aydın Z, Göller Bulut D. Relationship between the anatomic structures and mandibular posterior teeth for endodontic surgery in a Turkish population: a cone-beam computed tomographic analysis. Clin Oral Investig 2019; 23:3637-3644. [PMID: 30712074 DOI: 10.1007/s00784-019-02834-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 01/25/2019] [Indexed: 10/27/2022]
Abstract
OBJECTIVE The purpose of this study is to evaluate the relationship between anatomic structures and mandibular posterior region using cone-beam computed tomography (CBCT) in terms of endodontic surgery. METHODS A total of 150 CBCT images were used to investigate the proximity of the anatomical structures and the mandibular posterior teeth. The buccal and lingual bone thickness overlying each root, buccolingual, and mesiodistal dimension of the roots were measured at the level of 3 mm apical resection, and the mental foramen (MF) distance to the premolar teeth and the distance of the mandibular canal (MC) to all the posterior teeth were measured. RESULTS The thinnest part of the buccal cortical bone was measured in the first premolar teeth (1.70 mm) and in the mesial root of the first molar (2.25 mm) while the thickest region was measured in the distal root of the second molar tooth (6.95 mm). The maximum amount of substance to be removed was measured at the distal root of the second molar tooth (11.26 mm), and at least the first premolar tooth (5.52 mm) was measured for buccal resection. The distal root of the second molar tooth was found to be the closest tooth root to the MC with a mean of 2.75 mm, and the closest distance was measured as 0 mm. CONCLUSIONS It is important to evaluate the parameters such as mandibular buccal and lingual bone thickness, location of the MC and the MF, and root size for atraumatic endodontic surgical approach. Evaluation of these data before endodontic surgery provides guidance to the clinician in the planning of endodontic surgery. CLINICAL RELEVANCE The mandibular posterior region, which is difficult to reach with traditional surgical approach, is now easily reached using an operation microscope. For this reason, endodontic surgical procedures have become popular in mandibular posterior teeth. Therefore, the relationship between the mandibular posterior teeth and anatomical structures that are important in the planning of surgical access line is examined in this study.
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Affiliation(s)
- Zeliha Uğur Aydın
- Faculty of Dentistry, Department of Endodontics, Bolu Abant Izzet Baysal University, Bolu, Turkey.
| | - Duygu Göller Bulut
- Faculty of Dentistry, Department of Dentomaxillofacial Radiology, Bolu Abant Izzet Baysal University, Bolu, Turkey
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Cone-Beam Computed Tomography Study on Morphologic Characteristics of the Posterior Region in Hard Palate. J Craniofac Surg 2019; 30:921-925. [PMID: 30640859 DOI: 10.1097/scs.0000000000005157] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND The goal of this study is to evaluate the morphologic characteristics of the posterior palatine region among the Chinese population, more specifically, the greater palatine grooves, crests, bridges, and torus palatinus structures and make comparisons between different ethnic groups and minorities. METHODS A total of 323 cone-beam computed tomography (CBCT) scans were collected for analysis on the presence of grooves, crests, bridges, or torus palatinus (TP). Data were collected through recognizing the grooves, crests, bridges, and TPs and calculating the number of those anatomy structures. The statistics index, including average, standard deviation, were adopted to describe the subjects and Wilcoxon test, Mann-Whitney test, and Chi-squared test were all carried out by SPSS. RESULTS Three different morphologic manifestations of the greater palatine groove (GPG) found in the upper 1st and 2nd molar regions are as follows: no groove, 1 groove, and 2 grooves. The number of crests ranged from 0 to 3. And the incidence of torus palatines was 29%. Moreover, a positive correlation was found between the presence of crests/GPGs and age in the 2nd molar region. CONCLUSION The results in this study reveal that GPGs in the upper 1st and 2nd molar regions have 3 different morphologic manifestations among Chinese people and the number of crests can vary from 0 to 3 crests. Although the proportion of GPG or crest and the incidence of TP are different from the proportions of other studies, this may be due to the fact that different ethnic groups and sample sizes were used in the course of this study. Information about the anatomy structures of the posterior region in hard palate directly contributed to a decrease in potential complications during palatal implant surgery and periodontal surgery.
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