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Chen X, Jiang X, Chen S. Site selection of micro-implant anchorages in the infrazygomatic crest in adult orthodontic patients. Hua Xi Kou Qiang Yi Xue Za Zhi 2024; 42:207-213. [PMID: 38597080 PMCID: PMC11034412 DOI: 10.7518/hxkq.2024.2023282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 09/27/2023] [Indexed: 04/11/2024]
Abstract
OBJECTIVES To determine the optimal placement of miniscrews, this study compared adult male and female patients in terms of cortical bone density, cortical bone thickness, and available bone width in the infrazygomatic crest region. METHODS The cone beam computed tomography imaging data of 200 patients (20-30 years old; 100 males and 100 females) were collected. The right maxillary posterior teeth in the sagittal plane were divided into six levels from proximal to distal, and three measurement sites were positioned at vertical distances of 8, 10, and 12 mm from the cementum. Cortical bone density, cortical bone thickness, and available bone width were measured in 18 measurement sites in the infrazygomatic crest and analyzed statistically. RESULTS The highest cortical bone density, cortical bone thickness, and available bone width in the infrazygomatic crest in adult male and female patients were at the level of the interradicular space between the maxillary second premolar and maxillary first molar. The bone cortical density and thickness increased with vertical height, whereas the available bone width decreased with increasing vertical height. Differences were observed in cortical bone density, cortical bone thickness, and available bone width between adult male and female patients. CONCLUSIONS The optimal implantation sites of the micro-implant anchorages in the infrazygomatic crest were at the level of the interradicular space between the maxillary second premolar and the maxillary first molar, and the vertical height of the optimal implantation site in males was appropriately higher than that in females.
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Affiliation(s)
- Xinyi Chen
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Dept. of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Xiaoge Jiang
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Dept. of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Song Chen
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Dept. of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
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Furuhata R, Tanji A, Oki S, Kamata Y. Influence of Proximal Humeral Cortical Bone Thickness on the Radiographic Outcome After Osteosynthesis of Proximal Humeral Fractures: Propensity Matching Score Analysis. Geriatr Orthop Surg Rehabil 2023; 14:21514593231198645. [PMID: 37645438 PMCID: PMC10460996 DOI: 10.1177/21514593231198645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 08/15/2023] [Indexed: 08/31/2023] Open
Abstract
Introduction Osteoporosis can affect the surgical outcomes of proximal humeral fractures in older people. Recently, the cortical bone thickness of the proximal humerus on plain radiograph has been proposed to reflect local osteoporosis of the proximal humerus; however, its effect on the surgical outcome of proximal humeral fractures remains unclear. The purpose of this study is to investigate the influence of cortical bone thickness on postoperative radiographic outcomes after osteosynthesis for proximal humeral fractures. Materials and Methods We retrospectively identified 190 patients (≥50 years) who underwent osteosynthesis with an intramedullary nail or plate for proximal humeral fractures. The patients were categorized into 2 groups according to the cut-off value of an average proximal humerus cortical bone thickness of 6 mm on plain radiographs: patients with and without local osteoporosis. After propensity score matching, we compared the incidence of postoperative radiographic complications between the 2 groups. We also performed subgroup analyses of outcomes in a subgroup of patients who underwent intramedullary nailing and those who underwent plate fixation. Results Propensity score matching yielded 60 patients in each group. No significant difference in complication rates was observed between the 2 groups. However, in the intramedullary nailing subgroup, the incidence of reduction loss was significantly higher in patients with local osteoporosis than in those without local osteoporosis (51.7% vs 14.3%, P = .002). Discussion The proximal humeral cortical bone thickness had no significant effect on the overall radiographic outcome; however, reduction loss after intramedullary nailing was susceptible to local osteoporosis of the proximal humerus. Conclusion Our study suggests that plate fixation is advantageous in preventing postoperative reduction loss in patients with lower cortical bone thickness.
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Affiliation(s)
- Ryogo Furuhata
- Department of Orthopaedic Surgery,Ashikaga Red Cross Hospital, Ashikaga-shi, Japan
| | - Atsushi Tanji
- Department of Orthopaedic Surgery,Ashikaga Red Cross Hospital, Ashikaga-shi, Japan
| | - Satoshi Oki
- Department of Orthopaedic Surgery, Saiseikai Utsunomiya Hospital, Utsunomiya-shi, Japan
| | - Yusaku Kamata
- Department of Orthopaedic Surgery, National Hospital Organization Tokyo Medical Center, Meguro-ku, Japan
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Xu G, Wang D, Zhang H, Xu C, Li H, Zhang W, Li J, Zhang L, Tang P. Prediction of osteoporosis from proximal femoral cortical bone thickness and Hounsfield unit value with clinical significance. Front Surg 2023; 9:1047603. [PMID: 36684322 PMCID: PMC9852615 DOI: 10.3389/fsurg.2022.1047603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Accepted: 11/07/2022] [Indexed: 01/07/2023] Open
Abstract
Background Utilizing dual-energy x-ray absorptiometry (DXA) to assess bone mineral density (BMD) was not routine in many clinical scenarios, leading to missed diagnoses of osteoporosis. The objective of this study is to obtain effective parameters from hip computer tomography (CT) to screen patients with osteoporosis and predict their clinical outcomes. Methods A total of 375 patients with hip CT scans for intertrochanteric fracture were included. Among them, 56 patients possessed the data of both hip CT scans and DXA and were settled as a training group. The cortical bone thickness (CTh) and Hounsfield unit (HU) values were abstracted from 31 regions of interest (ROIs) of the proximal femur. In the training group, the correlations between these parameters and BMD were investigated, and their diagnostic efficiency of osteoporosis was assessed. Finally, 375 patients were divided into osteoporotic and nonosteoporotic groups based on the optimal cut-off values, and the clinical difference between subgroups was evaluated. Results The CTh value of ROI 21 and the HU value of ROI 14 were moderately correlated with the hip BMD [r = 0.475 and 0.445 (p < 0.001), respectively]. The best diagnostic effect could be obtained by defining osteoporosis as CTh value < 3.19 mm in ROI 21 or HU value < 424.97 HU in ROI 14, with accuracies of 0.821 and 0.883, sensitivities of 84% and 76%, and specificities of 71% and 87%, respectively. The clinical outcome of the nonosteoporotic group was better than that of the osteoporotic group regardless of the division criteria. Conclusion The CTh and HU values of specific cortex sites in the proximal femur were positively correlated with BMD of DXA at the hip. Thresholds for osteoporosis based on CTh and HU values could be utilized to screen osteoporosis and predict clinical outcomes.
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Affiliation(s)
- Gaoxiang Xu
- Medical School of Chinese PLA, Chinese PLA General Hospital, Beijing, China,Department of Orthopedics, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, China,National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, Chinese PLA General Hospital, Beijing, China
| | - Daofeng Wang
- Medical School of Chinese PLA, Chinese PLA General Hospital, Beijing, China,Department of Orthopedics, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, China,National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, Chinese PLA General Hospital, Beijing, China
| | - Hao Zhang
- Department of Orthopedics, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, China,National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, Chinese PLA General Hospital, Beijing, China
| | - Cheng Xu
- Department of Orthopedics, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, China,National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, Chinese PLA General Hospital, Beijing, China
| | - Hua Li
- Department of Orthopedics, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, China,National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, Chinese PLA General Hospital, Beijing, China
| | - Wupeng Zhang
- Department of Orthopedics, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, China,National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, Chinese PLA General Hospital, Beijing, China,School of Medicine, Nankai University, Tianjin, China
| | - Jiantao Li
- Department of Orthopedics, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, China,National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, Chinese PLA General Hospital, Beijing, China,Correspondence: Peifu Tang Licheng Zhang Jiantao Li
| | - Licheng Zhang
- Department of Orthopedics, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, China,National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, Chinese PLA General Hospital, Beijing, China,Correspondence: Peifu Tang Licheng Zhang Jiantao Li
| | - Peifu Tang
- Department of Orthopedics, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, China,National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, Chinese PLA General Hospital, Beijing, China,Correspondence: Peifu Tang Licheng Zhang Jiantao Li
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Abstract
The aim of this study was to clarify whether hydroxyapatite/collagen composite material (HAp/Col) could be useful as a graft material for maxillary sinus floor augmentation (MSFA). MSFA and implant placement were performed simultaneously. When the lateral approach was employed, 3 out of 19 implants failed in 3 maxillary sinuses (success rate; 84.2%), and in these cases the alveolar bone heights, cortical bone thicknesses and values of the implant stability quotient were smaller. If alveolar the bone height, cortical bone thickness, and healing period are optimized, HAp/Col can be a useful graft material for MSFA.
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Affiliation(s)
- Seigo Ohba
- Department of Regenerative Oral Surgery, Institute of Biomedical Sciences, Nagasaki University.,Center for Oral and Maxillofacial Implants, Nagasaki University Hospital
| | - Rena Shido
- Department of Regenerative Oral Surgery, Institute of Biomedical Sciences, Nagasaki University
| | - Izumi Asahina
- Department of Regenerative Oral Surgery, Institute of Biomedical Sciences, Nagasaki University.,Center for Oral and Maxillofacial Implants, Nagasaki University Hospital
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Wang SH, Ko YC, Tsai MT, Fuh LJ, Huang HL, Shen YW, Hsu JT. Can Male Patient's Age Affect the Cortical Bone Thickness of Jawbone for Dental Implant Placement? A Cohort Study. Int J Environ Res Public Health 2021; 18:4284. [PMID: 33919492 DOI: 10.3390/ijerph18084284] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 04/13/2021] [Accepted: 04/16/2021] [Indexed: 11/25/2022]
Abstract
Dental implants are among the most common treatments for missing teeth. The thickness of the crestal cortical bone at the potential dental implant site is a critical factor affecting the success rate of dental implant surgery. However, previous studies have predominantly focused on female patients, who are at a high risk of osteoporosis, for the discussion of bone quality and quantity at the dental implant site. This study aimed to investigate the effect of male patients’ age on the crestal cortical bone of the jaw at the dental implant site by using dental cone-beam computed tomography (CBCT). This study performed dental CBCT on 84 male patients of various ages to obtain tomograms of 288 dental implant sites at the jawbone (41 sites in the anterior maxilla, 95 in the posterior maxilla, 59 in the anterior mandible, and 93 in the posterior mandible) for measuring the cortical bone thickness. A one-way analysis of variance and Scheffe’s test were performed on the measurement results to compare the cortical bone thickness at implant sites in the four jaw areas. The correlation between male patient age and cortical bone thickness at the dental implant site was determined. The four jaw areas in order of the cortical bone thickness were as follows: posterior mandible (1.07 ± 0.44 mm), anterior mandible (0.99 ± 0.30 mm), anterior maxilla (0.82 ± 0.32 mm), and posterior maxilla (0.71 ± 0.27 mm). Apart from dental implant sites in the anterior and posterior mandibles, no significant correlation was observed between male patients’ age and the cortical bone thickness at the dental implant site.
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Priyadarshini SR, Sahoo PK, Niyogi S, Patnaik S, Bhuyan SK. Qualitative and morphological evaluation of the mandibular bone using computed tomography. Indian J Dent Res 2021; 31:899-903. [PMID: 33753661 DOI: 10.4103/ijdr.ijdr_259_19] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Context Determining the amount of cortical and cancellous bone present in the mandible is an important criterion for the selection of proper implant size and reduction of post implant placement complications. It becomes difficult to manage the presence of lingual undercuts when there is perforation of either the buccal or lingual cortical plates. Computed tomography (CT) images of the mandible can reduce the risk of complications by evaluating the thickness of cortical and cancellous bone in the mandible. Aims Evaluate thickness of the buccal and lingual cortical plates and cancellous bone. Gender variation in the cancellous bone and cortical bone thickness. Determine the shape of the mandible. Settings and Design A retrospective study was conducted using the CT scan images of pathologies pertaining to the Head and Neck region. Methods and Material CT scan images of 30 patients, comprising of 22 males and 8 females. The mental foramen was considered as the anatomical landmark and the vertical marking was considered at a height of 20 mm from basal bone. The thickness of both cortical and cancellous bone was noted 6 mm anterior to it and 18 mm posterior. The shape of the buccal and lingual cortical bone was also considered. Statistical Analysis Statistical analysis was done using Student's t-test or Chi-square test. Results The mean thickness of cortical bone was more in anterior mandible than posterior mandible and cortical bone density was thickest at height of 20 mm, whereas for cancellous bone, it was highest at 5 mm from the basal bone, thickness. Buccal concavity, type A (68.2%), was the most common in the anterior region for males, followed by round shape, type C (56-58%) in the posterior region. For females, type C (25-31%) in the posterior region and lingual concavity, type B (18-30%) were the most common types in the anterior region. Conclusions Lingual concavity may pose serious problems in cases of perforations during implant placement. Lingual cortical plates were thicker than the buccal cortical plates and it is concave anterior mandible. Thus, CT imaging can help in characterizing the quantity and morphology of the mandible.
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Affiliation(s)
- Smita R Priyadarshini
- Department of Oral Medicine and Radiology, Institute of Dental Sciences, Siksha O Anusandhan Deemed to be University, Bhubaneswar, Orissa, India
| | - Pradyumna K Sahoo
- Department of Oral Medicine and Radiology, Institute of Dental Sciences, Siksha O Anusandhan Deemed to be University, Bhubaneswar, Orissa, India
| | - Shayari Niyogi
- Department of Oral Medicine and Radiology, Institute of Dental Sciences, Siksha O Anusandhan Deemed to be University, Bhubaneswar, Orissa, India
| | - Swati Patnaik
- Department of Oral Medicine and Radiology, Institute of Dental Sciences, Siksha O Anusandhan Deemed to be University, Bhubaneswar, Orissa, India
| | - Sanat K Bhuyan
- Department of Oral Medicine and Radiology, Institute of Dental Sciences, Siksha O Anusandhan Deemed to be University, Bhubaneswar, Orissa, India
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Lee DW, Park JH, Bay RC, Choi SK, Chae JM. Cortical bone thickness and bone density effects on miniscrew success rates: A systematic review and meta-analysis. Orthod Craniofac Res 2020; 24 Suppl 1:92-102. [PMID: 33277824 DOI: 10.1111/ocr.12453] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 11/26/2020] [Accepted: 11/27/2020] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To systematically review the effects of cortical bone thickness (CBT) and bone mass density (BMD) on miniscrew success rates. METHODS MEDLINE, the Cochrane Library and Scopus were searched up to June 2020. Of a total of 5734 articles, seven studies were finally selected for the review. RESULTS The overall mean success rate weighted by the number of miniscrews was 87.21% (89.87% in the maxilla and 79.24% in the mandible). There was a significantly higher success rate for miniscrews placed in the maxilla compared with those in the mandible (P < .05). CBT showed small positive effect on the success rate of the miniscrews although it failed to reach a statistical significance. The cortical BMD had a minimal effect on the success of the miniscrews. The cancellous BMD demonstrated a very strong effect on the success of the miniscrews in the maxilla, whereas it showed a moderately negative effect in the mandible. LIMITATIONS Because of the small number and clinical heterogeneity of the included studies, the results should be interpreted with caution. Further randomized clinical studies with a large sample size are recommended.
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Affiliation(s)
| | - Jae Hyun Park
- Postgraduate Orthodontic Program, Arizona School of Dentistry & Oral Health, A.T. Still University, Mesa, AZ, USA.,Graduate School of Dentistry, Kyung Hee University, Seoul, Korea
| | - R Curtis Bay
- Biostatistics, Department of Interdisciplinary Health Sciences, A. T. Still University, Mesa, AZ, USA
| | - Sung-Kwon Choi
- Department of Orthodontics, School of Dentistry, University of Wonkwang, Iksan, Korea
| | - Jong-Moon Chae
- Postgraduate Orthodontic Program, Arizona School of Dentistry & Oral Health, A.T. Still University, Mesa, AZ, USA.,Department of Orthodontics, School of Dentistry, Wonkwang Dental Research Institute, University of Wonkwang, Iksan, Korea
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Popa A, Dehelean C, Calniceanu H, Watz C, Brad S, Sinescu C, Marcu OA, Popa CS, Avram S, Nicolov M, Szuhanek CA. A Custom-Made Orthodontic Mini-Implant-Effect of Insertion Angle and Cortical Bone Thickness on Stress Distribution with a Complex In Vitro and In Vivo Biosafety Profile. Materials (Basel) 2020; 13:ma13214789. [PMID: 33120951 PMCID: PMC7663474 DOI: 10.3390/ma13214789] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 10/19/2020] [Accepted: 10/23/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND Orthodontic mini-implant failure is a debatable subject in clinical practice. However, the most important parameter to evaluate the success rate of mini-implant is the primary stability, which is mainly influenced by cortical bone thickness (CBT) and insertion angle. MATERIALS AND METHODS Three-dimensional finite element models of the maxilla were created and a custom-made, self-drilling, tapered mini-implant was designed. For the pull-out test, 12 simulations were performed, sequentially increasing the thickness of the cortical bone (1, 1.5 and 2 mm) and the insertion angle (30°, 60°, 90°, 120°). For the force analysis, 24 simulations were performed using an experimental orthodontic traction force of 2 N both in the horizontal and vertical axis. RESULTS Insertion angle and CBT have significant impact on force reaction values (p < 0.05). Cortical bone stress had the lowest value when the mini-implant had a 30° insertion angle and the highest value when the implant had a 120° insertion angle, while the CBT was 1 mm. Cortical bone stress had the lowest value with an insertion angle of 90° and the highest value when the implant was inserted at an angle of 30°, while the CBT was 2 mm independent of the force direction. Regarding the biosafety profile of the mini-implant alloy, the present results reveal that the custom-made mini-implant presents good biocompatibility. CONCLUSIONS When the CBT is reduced, we recommend inclined insertion while, when the CBT is appropriate, perpendicular insertion is advised.
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Affiliation(s)
- Adelina Popa
- 2nd Department of Orthodontics, Faculty of Dental Medicine, Victor Babes University of Medicine and Pharmacy, 300041 Timisoara, Romania; (A.P.); (C.A.S.)
| | - Cristina Dehelean
- 2nd Department of Toxicology and Drug Industry, Faculty of Pharmacy, Victor Babes University of Medicine and Pharmacy, 300041 Timisoara, Romania;
| | - Horia Calniceanu
- 1st Department/Periodontology, Faculty of Dental Medicine, Victor Babes University of Medicine and Pharmacy, 300041 Timisoara, Romania
- Correspondence: (H.C.); (C.W.); Tel.: +40-745-322-649 (H.C.); +40-746-227-217 (C.W.)
| | - Claudia Watz
- 1st Department of Pharmaceutical Physics and Biophysics, Faculty of Pharmacy, Victor Babes University of Medicine and Pharmacy, 300041 Timisoara, Romania;
- Correspondence: (H.C.); (C.W.); Tel.: +40-745-322-649 (H.C.); +40-746-227-217 (C.W.)
| | - Silviu Brad
- 2nd Department of Radiology, Faculty of Dental Medicine, Victor Babes University of Medicine and Pharmacy, 300041 Timisoara, Romania;
| | - Cosmin Sinescu
- 2nd Department of Prostheses Technology and Dental Material, Faculty of Dental Medicine, Victor Babes University of Medicine and Pharmacy, 300041 Timisoara, Romania;
| | - Olivia A. Marcu
- Dental Medicine Department, Faculty of Medicine and Pharmacy, University of Oradea, 410087 Oradea, Romania;
| | | | - Stefana Avram
- 2nd Department of Pharmacognosy, Faculty of Pharmacy, Victor Babes University of Medicine and Pharmacy, 300041 Timisoara, Romania;
| | - Mirela Nicolov
- 1st Department of Pharmaceutical Physics and Biophysics, Faculty of Pharmacy, Victor Babes University of Medicine and Pharmacy, 300041 Timisoara, Romania;
| | - Camelia A. Szuhanek
- 2nd Department of Orthodontics, Faculty of Dental Medicine, Victor Babes University of Medicine and Pharmacy, 300041 Timisoara, Romania; (A.P.); (C.A.S.)
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Wang SH, Shen YW, Fuh LJ, Peng SL, Tsai MT, Huang HL, Hsu JT. Relationship between Cortical Bone Thickness and Cancellous Bone Density at Dental Implant Sites in the Jawbone. Diagnostics (Basel) 2020; 10:diagnostics10090710. [PMID: 32957724 PMCID: PMC7555203 DOI: 10.3390/diagnostics10090710] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 09/10/2020] [Accepted: 09/15/2020] [Indexed: 11/16/2022] Open
Abstract
Dental implant surgery is a common treatment for missing teeth. Its survival rate is considerably affected by host bone quality and quantity, which is often assessed prior to surgery through dental cone-beam computed tomography (CBCT). Dental CBCT was used in this study to evaluate dental implant sites for (1) differences in and (2) correlations between cancellous bone density and cortical bone thickness among four regions of the jawbone. In total, 315 dental implant sites (39 in the anterior mandible, 42 in the anterior maxilla, 107 in the posterior mandible, and 127 in the posterior maxilla) were identified in dental CBCT images from 128 patients. All CBCT images were loaded into Mimics 15.0 to measure cancellous bone density (unit: grayscale value (GV) and cortical bone thickness (unit: mm)). Differences among the four regions of the jawbone were evaluated using one-way analysis of variance and Scheffe's posttest. Pearson coefficients for correlations between cancellous bone density and cortical bone thickness were also calculated for the four jawbone regions. The results revealed that the mean cancellous bone density was highest in the anterior mandible (722 ± 227 GV), followed by the anterior maxilla (542 ± 208 GV), posterior mandible (535 ± 206 GV), and posterior maxilla (388 ± 206 GV). Cortical bone thickness was highest in the posterior mandible (1.15 ± 0.42 mm), followed by the anterior mandible (1.01 ± 0.32 mm), anterior maxilla (0.89 ± 0.26 mm), and posterior maxilla (0.72 ± 0.19 mm). In the whole jawbone, a weak correlation (r = 0.133, p = 0.041) was detected between cancellous bone density and cortical bone thickness. Furthermore, except for the anterior maxilla (r = 0.306, p = 0.048), no correlation between the two bone parameters was observed (all p > 0.05). Cancellous bone density and cortical bone thickness varies by implant site in the four regions of the jawbone. The cortical and cancellous bone of a jawbone dental implant site should be evaluated individually before surgery.
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Affiliation(s)
- Shiuan-Hui Wang
- Master Program for Biomedical Engineering, China Medical University, Taichung 404, Taiwan;
| | - Yen-Wen Shen
- School of Dentistry, China Medical University, Taichung 404, Taiwan; (Y.-W.S.); (L.-J.F.); (H.-L.H.)
- Department of Dentistry, China Medical University and Hospital, Taichung 404, Taiwan
| | - Lih-Jyh Fuh
- School of Dentistry, China Medical University, Taichung 404, Taiwan; (Y.-W.S.); (L.-J.F.); (H.-L.H.)
- Department of Dentistry, China Medical University and Hospital, Taichung 404, Taiwan
| | - Shin-Lei Peng
- Department of Biomedical Imaging and Radiological Science, China Medical University, Taichung 404, Taiwan;
| | - Ming-Tzu Tsai
- Department of Biomedical Engineering, Hungkuang University, Taichung 433, Taiwan;
| | - Heng-Li Huang
- School of Dentistry, China Medical University, Taichung 404, Taiwan; (Y.-W.S.); (L.-J.F.); (H.-L.H.)
- Department of Bioinformatics and Medical Engineering, Asia University, Taichung 413, Taiwan
| | - Jui-Ting Hsu
- School of Dentistry, China Medical University, Taichung 404, Taiwan; (Y.-W.S.); (L.-J.F.); (H.-L.H.)
- Department of Bioinformatics and Medical Engineering, Asia University, Taichung 413, Taiwan
- Correspondence:
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Dharmadeep G, Naik MK, Reddy YM, Cheruluri S, Praveen Raj K, Reddy BR. Three-dimensional Evaluation of Interradicular Areas and Cortical Bone Thickness for Orthodontic Miniscrew Implant Placement Using Cone-beam Computed Tomography. J Pharm Bioallied Sci 2020; 12:S99-S104. [PMID: 33149438 PMCID: PMC7595513 DOI: 10.4103/jpbs.jpbs_36_20] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 02/24/2020] [Accepted: 03/13/2020] [Indexed: 11/04/2022] Open
Abstract
Background Factors that influence anchorage of the orthodontic miniscrew implants are interradicular areas and cortical bone thickness. Aims and Objectives The aim of this study was to evaluate the three-dimensional interradicular areas and the buccal cortical bone thickness in Indian patients using cone beam computed tomography (CBCT) images, and to find the suitable and safe sites for orthodontic miniscrew implant placement. Materials and Methods CBCT images of 20 patients were divided into three planes as axial, coronal, and sagittal. Measurements, that is, mesiodistal distance and buccal cortical bone thickness were taken at five different heights from the cementoenamel junction (CEJ) toward apical region. Results In the maxilla, the safe sites for placing miniscrew implant were between the second premolar and first molar at 10-mm height, whereas in the mandible, the safe sites for placing miniscrew implant were between the first and second premolar at 6-, 8-, and 10-mm height, between the second premolar and first molar at 10-mm height, and between the first and second molar at 8- and 10-mm height. Conclusion CBCT can be effectively used to evaluate interradicular areas and cortical bone thickness in predicting the safe and suitable sites for placing orthodontic miniscrew implants.
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Affiliation(s)
- Garadappagari Dharmadeep
- Department of Orthodontics and Dentofacial Orthopedics, G. Pulla Reddy Dental College and Hospital, Kurnool, Andhra Pradesh, India
| | - Moode Kaladhar Naik
- Department of Orthodontics and Dentofacial Orthopedics, Government Dental College and Hospital, Kadapa, Andhra Pradesh, India
| | - Yellampalli Muralidhar Reddy
- Department of Orthodontics and Dentofacial Orthopedics, G. Pulla Reddy Dental College and Hospital, Kurnool, Andhra Pradesh, India
| | - Sreekanth Cheruluri
- Department of Orthodontics and Dentofacial Orthopedics, G. Pulla Reddy Dental College and Hospital, Kurnool, Andhra Pradesh, India
| | - Kranthi Praveen Raj
- Department of Orthodontics and Dentofacial Orthopedics, G. Pulla Reddy Dental College and Hospital, Kurnool, Andhra Pradesh, India
| | - Badepalli Reddeppa Reddy
- Department of Orthodontics and Dentofacial Orthopedics, G. Pulla Reddy Dental College and Hospital, Kurnool, Andhra Pradesh, India
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Ko YC, Tsai MT, Fuh LJ, Tsai MJ, Wang XH, Huang HL, Hsu JT. Association between Age of Menopause and Thickness of Crestal Cortical Bone at Dental Implant Site: A Cross-Sectional Observational Study. Int J Environ Res Public Health 2020; 17:ijerph17165868. [PMID: 32823531 PMCID: PMC7460029 DOI: 10.3390/ijerph17165868] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 08/08/2020] [Accepted: 08/09/2020] [Indexed: 11/16/2022]
Abstract
Satisfactory host bone quality and quantity promote greater primary stability and better osseointegration, leading to a high success rate in the use of dental implants. However, the increase in life expectancy as a result of medical advancements has led to an aging population, suggesting that osteoporosis may become a problem in clinical dental implant surgery. Notably, relative to the general population, bone insufficiency is more common in women with post-menopausal osteoporosis. The objective of this study was to compare the thickness of the crestal cortical bone at prospective dental implant sites between menopausal and non-menopausal women. Prospective dental implant sites in the jawbone were evaluated in two groups of women: a younger group (<50 years old), with 149 sites in 48 women, and an older group (>50 years old) with 191 sites, in 37 women. The thickness of the crestal cortical bone at the dental implant site was measured based on each patient’s dental cone-beam computed tomography images. For both groups, one-way analysis of variance and Tukey’s post-test were used to assess the correlation between cortical bone thickness and the presence of implants in the four jawbone regions. Student’s t-test was further used to compare differences between the older and younger groups. From the retrospective study results, for both groups, thickness of the crestal cortical bone was the highest in the posterior mandible, followed by anterior mandible, anterior maxilla, and posterior maxilla. Compared with the younger group, the older group had a lower mean thickness of the crestal cortical bone. Among the four regions, however, only in the posterior maxilla was the crestal cortical bone significantly thinner in the older group than in the younger group.
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Affiliation(s)
- Yi-Chun Ko
- School of Dentistry, China Medical University, Taichung 404, Taiwan; (Y.-C.K.); (L.-J.F.)
| | - Ming-Tzu Tsai
- Department of Biomedical Engineering, Hungkuang University, Taichung 433, Taiwan;
| | - Lih-Jyh Fuh
- School of Dentistry, China Medical University, Taichung 404, Taiwan; (Y.-C.K.); (L.-J.F.)
- Department of Dentistry, China Medical University and Hospital, Taichung 404, Taiwan;
| | - Min-Jia Tsai
- Department of Dentistry, China Medical University and Hospital, Taichung 404, Taiwan;
| | - Xuan-Hui Wang
- Master Program for Biomedical Engineering, China Medical University, Taichung 404, Taiwan;
| | - Heng-Li Huang
- School of Dentistry, China Medical University, Taichung 404, Taiwan; (Y.-C.K.); (L.-J.F.)
- Department of Bioinformatics and Medical Engineering, Asia University, Taichung 413, Taiwan
- Correspondence: (H.-L.H.); (J.-T.H.); Tel.: +886-4-22053366 (ext. 2306) (H.-L.H.); +886-4-22053366 (ext. 2308) (J.-T.H.)
| | - Jui-Ting Hsu
- School of Dentistry, China Medical University, Taichung 404, Taiwan; (Y.-C.K.); (L.-J.F.)
- Department of Bioinformatics and Medical Engineering, Asia University, Taichung 413, Taiwan
- Correspondence: (H.-L.H.); (J.-T.H.); Tel.: +886-4-22053366 (ext. 2306) (H.-L.H.); +886-4-22053366 (ext. 2308) (J.-T.H.)
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12
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Dixon RM, Coates DB, Mayer RJ, Miller CP. Alternative rib bone biopsy measurements to estimate changes in skeletal mineral reserves in cattle. Animal 2019; 13:119-26. [PMID: 29669613 DOI: 10.1017/S175173111800068X] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Rib bone biopsy samples are often used to estimate changes in skeletal mineral reserves in cattle but differences in sampling procedures and the bone measurements reported often make interpretation and comparisons among experiments difficult. 'Full-core' rib bone biopsy samples, which included the external cortical bone, internal cortical bone and trabecular bone (CBext, CBint and Trab, respectively), were obtained from cattle known to be in phosphorus (P) adequate (Padeq) or severely P-deficient (Pdefic) status. Experiments 1 and 2 examined growing steers and Experiment 3 mature breeder cows. The thickness of cortical bone, specific gravity (SG), and the amount and concentration of ash and P per unit fresh bone volume, differed among CBext, CBint and Trab bone. P concentration (mg/cc) was closely correlated with both SG and ash concentrations (pooled data, r=0.99). Thickness of external cortical bone (CBText) was correlated with full-core P concentration (FC-Pconc) (pooled data, r=0.87). However, an index, the amount of P in CBext per unit surface area of CBext (PSACB; mg P/mm2), was more closely correlated with the FC-Pconc (pooled data, FC-Pconc=37.0+146×PSACB; n=42, r=0.94, RSD=7.7). Results for measured or estimated FC-Pconc in 10 published studies with cattle in various physiological states and expected to be Padeq or in various degrees of Pdefic status were collated and the ranges of FC-Pconc indicative of P adequacy and P deficiency for various classes of cattle were evaluated. FC-Pconc was generally in the range 130 to 170 and 100 to 120 mg/cc fresh bone in Padeq mature cows and young growing cattle, respectively. In conclusion, the FC-Pconc could be estimated accurately from biopsy samples of CBext. This allows comparisons between studies where full-core or only CBext biopsy samples of rib bone have been obtained to estimate changes in the skeletal P status of cattle and facilitates evaluation of the P status of cattle.
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Matsui D, Watanabe I, Koyama T, Ozaki E, Kuriyama N, Mizuno S, Watanabe Y. Japanese female Kendo practitioners are associated with high radial bone mineral density. J Sports Sci 2017; 35:1-6. [PMID: 28282759 DOI: 10.1080/02640414.2016.1236209] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Osteopenia is a condition in which bone mineral density (BMD) is lower than normal. Exercise increases BMD in both the young and adults. This study aimed to compare the radial apparent BMD (aBMD) in Japanese females who are Kendo practitioners (KPs) and those with no regular exercise habits (no-REH). The analysis participants consisted of 45 KPs (mean age: 49.4 years old) and 110 no-REH (mean age: 48.8 years old). Radial aBMD was measured using an ultrasonic bone densitometry system. Radial aBMD in KPs was 196.1 ± 33.9 mg/cm3, and was 182.9 ± 45.3 mg/cm3 in no-REH participants. KPs had significantly higher BMD than no-REH participants. In KPs, left radial aBMD was 196.1 ± 33.9 mg/cm3, and right radial aBMD was 184.5 ± 37.7 mg/cm3. The left radius was also significantly higher than the right radius with respect to aBMD in KPs. After adjusting for age, body mass index, menstrual status, parous women and frequency of milk and dairy intake, the odds ratio (OR) of osteopenia associated with no-REH was 6.58 (95% confidence interval (CI): 1.72-25.1) and the prevalence ratio (PR) of osteopenia associated with no-REH was 4.12 (95% CI: 1.23-13.7). Therefore, the Kendo practice may have a protective efficacy for osteopenia in women.
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Affiliation(s)
- Daisuke Matsui
- a Department of Epidemiology for Community Health and Medicine , Kyoto Prefectural University of Medicine, Graduate School of Medical Science , Kyoto , Japan
| | - Isao Watanabe
- a Department of Epidemiology for Community Health and Medicine , Kyoto Prefectural University of Medicine, Graduate School of Medical Science , Kyoto , Japan
| | - Teruhide Koyama
- a Department of Epidemiology for Community Health and Medicine , Kyoto Prefectural University of Medicine, Graduate School of Medical Science , Kyoto , Japan
| | - Etsuko Ozaki
- a Department of Epidemiology for Community Health and Medicine , Kyoto Prefectural University of Medicine, Graduate School of Medical Science , Kyoto , Japan
| | - Nagato Kuriyama
- a Department of Epidemiology for Community Health and Medicine , Kyoto Prefectural University of Medicine, Graduate School of Medical Science , Kyoto , Japan
| | - Shigeto Mizuno
- b Endoscopy Department, Nara Hospital , Kinki University Faculty of Medicine , Nara , Japan
| | - Yoshiyuki Watanabe
- a Department of Epidemiology for Community Health and Medicine , Kyoto Prefectural University of Medicine, Graduate School of Medical Science , Kyoto , Japan
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14
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Promma L, Sakulsak N, Putiwat P, Amarttayakong P, Iamsaard S, Trakulsuk H, Hirunyakorn K, Suarbua S, Wattanaraeungchai Y. Cortical bone thickness of the mandibular canal and implications for bilateral sagittal split osteotomy: a cadaveric study. Int J Oral Maxillofac Surg 2017; 46:572-577. [PMID: 28089388 DOI: 10.1016/j.ijom.2016.12.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 09/12/2016] [Accepted: 12/15/2016] [Indexed: 10/20/2022]
Abstract
Preoperative delineation of the mandibular canal and surrounding cortical bone thickness is mandatory prior to bilateral sagittal split osteotomy (BSSO). The cortical bone thickness of 101 cadaveric mandibles was measured to define the mandibular canal. The mandibles were cut at the anterior ramus, at the third, second, and first molar, and at the premolar. The cortical bone thickness was measured between the mandibular canal and inferior border, buccal cortex, and lingual cortex at each cutting point. No difference was found between the right and left sides of the mandible, or between males and females, with one exception: males were found to have thicker inferior cortical bone at the premolar site than females. The implications for BSSO are: (1) for sagittal bone cutting, the maximum cutting depth of the buccal cortex at the ramus is 4.5mm, at the second and third molars is 6.5mm, and at the first molar is 5mm; (2) for vertical bone cutting at the first molar, the maximum cutting depth from the inferior border is 7.5mm. The measurement of cortical bone thickness from cadaveric mandibles provides useful preoperative information and confirms the results of computed tomography.
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Affiliation(s)
- L Promma
- Department of Oral Surgery, Faculty of Dentistry, Naresuan University, Phitsanulok, Thailand.
| | - N Sakulsak
- Department of Anatomy, Faculty of Medical Science, Naresuan University, Phitsanulok, Thailand
| | - P Putiwat
- Department of Anatomy, Faculty of Medical Science, Naresuan University, Phitsanulok, Thailand
| | - P Amarttayakong
- Department of Anatomy, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - S Iamsaard
- Department of Anatomy, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - H Trakulsuk
- Department of Oral Surgery, Faculty of Dentistry, Naresuan University, Phitsanulok, Thailand
| | - K Hirunyakorn
- Department of Oral Surgery, Faculty of Dentistry, Naresuan University, Phitsanulok, Thailand
| | - S Suarbua
- Department of Oral Surgery, Faculty of Dentistry, Naresuan University, Phitsanulok, Thailand
| | - Y Wattanaraeungchai
- Department of Oral Surgery, Faculty of Dentistry, Naresuan University, Phitsanulok, Thailand
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15
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Ko YC, Huang HL, Shen YW, Cai JY, Fuh LJ, Hsu JT. Variations in crestal cortical bone thickness at dental implant sites in different regions of the jawbone. Clin Implant Dent Relat Res 2017; 19:440-446. [PMID: 28074591 DOI: 10.1111/cid.12468] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 10/20/2016] [Accepted: 11/19/2016] [Indexed: 01/06/2023]
Abstract
BACKGROUND Dental implants have become reliable and predictable tools for treating missing teeth. The survival rate of dental implants is markedly influenced by the host bone quality and quantity of the jawbone. A better host bone provides higher initial stability of the dental implant, resulting in better osseointegration and a higher success rate. Host bone quality and quantity are determined by the crestal cortical bone thickness and inner cancellous bone density. OBJECTIVE The purpose of this study was to determine the crestal cortical bone thickness at dental implant sites in different regions of the jawbone through the use of dental cone-beam computed tomographic (CBCT) images. MATERIALS AND METHODS A total of 661 dental implant sites (81 in the anterior mandible, 122 in the anterior maxilla, 224 in the posterior mandible, and 234 in the posterior maxilla) were obtained from the jawbones of 173 humans. The data were subjected to statistical analysis to determine any correlation between crestal cortical bone thicknesses and jawbone regions using one-way analysis of variance with Tukey's post-test. RESULTS The crestal cortical bone thicknesses at dental implant sites in the four regions decreased in the following order: posterior mandible (1.07 ± 0.47 mm, mean ± SD) >anterior mandible (0.99 ± 0.36 mm) >anterior maxilla (0.82 ± 0.30 mm) >posterior maxilla (0.75 ± 0.35 mm). CONCLUSION The dental CBCT data demonstrate that crestal cortical bone thickness varies markedly between dental implant sites in the four regions of the jawbone.
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Affiliation(s)
- Yi-Chun Ko
- School of Dentistry, College of Medicine, China Medical University, Taichung, 404, Taiwan
| | - Heng-Li Huang
- School of Dentistry, College of Medicine, China Medical University, Taichung, 404, Taiwan.,Department of Bioinformatics and Medical Engineering, Asia University, Taichung, 413, Taiwan
| | - Yen-Wen Shen
- School of Dentistry, College of Medicine, China Medical University, Taichung, 404, Taiwan.,Department of Dentistry, China Medical University and Hospital, Taichung, 404, Taiwan
| | - Jyun-Yi Cai
- School of Dentistry, College of Medicine, China Medical University, Taichung, 404, Taiwan.,Department of Dentistry, China Medical University and Hospital, Taichung, 404, Taiwan
| | - Lih-Jyh Fuh
- School of Dentistry, College of Medicine, China Medical University, Taichung, 404, Taiwan.,Department of Dentistry, China Medical University and Hospital, Taichung, 404, Taiwan
| | - Jui-Ting Hsu
- School of Dentistry, College of Medicine, China Medical University, Taichung, 404, Taiwan.,Department of Bioinformatics and Medical Engineering, Asia University, Taichung, 413, Taiwan
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16
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Tikku AP, Bharti R, Sharma N, Chandra A, Kumar A, Kumar S. Role of ultrasound and color doppler in diagnosis of periapical lesions of endodontic origin at varying bone thickness. J Conserv Dent 2016; 19:147-51. [PMID: 27099421 PMCID: PMC4815543 DOI: 10.4103/0972-0707.178694] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
AIMS To access the role of ultrasound and color doppler in diagnosing periapical lesions of maxilla and mandible. SETTINGS AND DESIGN This study was conducted in the Department of Conservative Dentistry and Endodontics (Faculty of Dental Sciences), Department of Radiotherapy, and Department of Pathology. MATERIALS AND METHODS The study group comprised 30 patients with periapical lesions of endodontic origin in maxilla and mandible requiring endodontic surgery. After thorough clinical and radiographic examination patients were subjected to ultrasound and color doppler examination, where the lesions were assessed for their contents as to cystic or solid. Following which periapical surgery was done and the pathological tissue obtained was subjected to histopathological examination. The results of the ultrasound examination were correlated with histopathological features. The diagnostic validity of ultrasound was assessed by calculating the sensitivity, specificity, positive predictive value, and negative predictive value. STATISTICAL ANALYSIS USED The statistical analysis was done using statistical package for social sciences (SPSS) version 15.0 statistical analysis software. The values were represented in number (%). RESULTS Within the limitations of the current study it can be stated that although ultrasound may not establish the definitive diagnosis, it can facilitate the differential diagnosis between cystic and solid granulomatous lesions. However, this technique may have a limited role in detecting periapical lesions present in the region with thick overlying cortical bone. CONCLUSION Ultrasound can routinely be recommended as a complimentary method for the diagnosis of periapical lesions of endodontic origin. However, this technique may have a limited role in detecting periapical lesions present in the region with thick overlying cortical bone.
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Affiliation(s)
- Aseem P Tikku
- Department of Conservative Dentistry and Endodontics, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - Ramesh Bharti
- Department of Conservative Dentistry and Endodontics, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - Neha Sharma
- Department of Conservative Dentistry and Endodontics, Government Dental College, Shimla, Himachal Pradesh, India
| | - Anil Chandra
- Department of Conservative Dentistry and Endodontics, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - Ashutosh Kumar
- Department of Pathology, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - Sunil Kumar
- Department of Radiotherapy, King George's Medical University, Lucknow, Uttar Pradesh, India
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17
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Johari M, Kaviani F, Saeedi A. Relationship Between the Thickness of Cortical Bone at Maxillary Mid-palatal Area and Facial Height Using CBCT. Open Dent J 2015; 9:287-91. [PMID: 26464597 PMCID: PMC4598370 DOI: 10.2174/1874210601509010287] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Revised: 12/29/2014] [Accepted: 05/25/2015] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION Orthodontic mini-implants have been incorporated into orthodontic treatment modalities. Adequate bone at mini-implant placement site can influence the success or failure of anchorage. The present study was to determine the thickness of cortical bone in the maxillary mid-palatal area at predetermined points for the placement of orthodontic mini-implants using Cone Beam CT technique in order to evaluate the relationship of these values with the facial height. Materials and Methods : A total of 161 patients, consisting of 63 males (39.13%) and 98 females (60.87%), were evaluated in the present study; 38% of the subjects had normal facial height, 29% had short face and 33% had long face. In order to determine which patient belongs to which facial height category, i.e. normal, long or short, two angular and linear evaluations were used: the angle between S-N and Go-Me lines and the S-Go/N-Me ratio. Twenty points were evaluated in all the samples. First the incisive foramen was located. The paracoronal cross-sections were prepared at distances of 4, 8, 16 and 24 mm from the distal wall of the incisive foramen and on each cross-section the mid-sagittal and para-sagittal areas were determined bilaterally at 3- and 6-mm distances (a total of 5 points). The thicknesses of the cortical plate of bone were determined at the predetermined points. Results : There was a significant relationship between the mean cortical bone thickness and facial height (p<0.01), with significantly less thickness in long faces compared to short faces. However, the thickness of cortical bone in normal faces was similar to that in long and short faces. Separate evaluation of the points showed that at point a16 subjects with short faces had thicker cortical bone compared to subjects with long and normal faces. At point b8 in long faces, the thickness of the cortical bone was significantly less than that in short and normal faces. At point d8, the thickness of the cortical bone in subjects with short faces was significantly higher than that in subjects with long faces. Conclusion : At the point a16 the cortical bone thickness in short faces was significantly higher than normal and long faces. The lower thickness of the cortical bone in the palatal area at points b8 and d8 in subjects with long faces might indicate a lower anchorage value of these points in these subjects.
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Affiliation(s)
| | | | - Arman Saeedi
- Tabriz University of Medical Sciences, Tabriz, Iran
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Howashi M, Tsukiyama Y, Ayukawa Y, Isoda-Akizuki K, Kihara M, Imai Y, Sogo M, Koyano K. Relationship between the CT Value and Cortical Bone Thickness at Implant Recipient Sites and Primary Implant Stability with Comparison of Different Implant Types. Clin Implant Dent Relat Res 2014; 18:107-16. [PMID: 25181581 DOI: 10.1111/cid.12261] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Studies have shown that bone quality at the implant recipient site can influence primary stability. PURPOSE The aims of this study were to explore the quantitative estimation of the primary stability of implants preoperatively using CT values and to examine the effect of different implant designs with recommended socket preparation on primary stability. MATERIALS AND METHODS Forty-four fresh porcine femoral heads were prepared. The bone surrounding implant sockets was preoperatively evaluated by helical CT. Forty-four implants (φ 4.3 × 10 mm), 22 straight and 22 tapered, were placed according to the manufacturer's instructions. The insertion torque value (ITV), implant stability quotient (ISQ), and removal torque value (RTV) were recorded as indicators of primary implant stability. RESULTS Significant correlations and linear relationships were found between the CT value and ITV, ISQ, and RTV for both straight and tapered implants (Spearman's correlation coefficient, p < .001; linear regression analysis, p < .01). Tapered implants had a significantly higher ITV than straight implants (analysis of covariance, p < .01). CONCLUSIONS Obtained results suggest that the primary stability of implants could be quantitatively estimated using the CT value preoperatively, indicating the CT value of bone surrounding an implant can contribute considerably to implant planning and design choice in clinical situations.
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Affiliation(s)
- Miori Howashi
- Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Yoshihiro Tsukiyama
- Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Yasunori Ayukawa
- Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Kei Isoda-Akizuki
- Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Masafumi Kihara
- Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Yu Imai
- Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Motofumi Sogo
- Division of Prosthodontics and Oral Rehabilitation, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - Kiyoshi Koyano
- Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
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