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van Gemert LN, Campbell PM, Opperman LA, Buschang PH. Localizing the osseous boundaries of micro-osteoperforations. Am J Orthod Dentofacial Orthop 2019; 155:779-790. [PMID: 31153498 DOI: 10.1016/j.ajodo.2018.07.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 07/01/2018] [Accepted: 07/01/2018] [Indexed: 12/23/2022]
Abstract
INTRODUCTION The aim of this work was to determine how far the effects of micro-osteoperforations (MOPs) extend within bone by quantifying the damage caused and the short-term bony adaptations that occur in and around the injury site. METHODS With the use of a split-mouth design, 34 MOPs (Propel) were randomly placed in the mandibular furcal bone of 13 beagle dogs either 2 or 4 weeks before killing them. The control side received no treatment. Vickers hardness microindentation, microscopic computed tomography, and histologic analyses were performed to evaluate the bone surrounding the MOPs. RESULTS Microfractures produced during insertion extended ∼0.6 mm from the MOP sites. Cortical and trabecular bone were significantly less dense on the experimental than on the control side up to 4.2 mm from the edge of the MOP, but side differences were small (<5%) beyond 1.5 mm from the MOP. Experimental cortical bone was significantly softer than the control bone up to 0.8 mm from the MOP after 2 weeks of healing, and up to 0.5 mm from the MOP after 4 weeks of healing. Hematoxylin and eosin stained sections of cortical and trabecular bone showed small areas of woven bone within the MOP sites after 2 weeks, and acellular areas of bone extending ∼0.5 mm from the MOP. After 4 weeks of healing, there were greater amounts of woven bone, as well as early signs of lamellar bone, in and around the MOP sites. Markedly increased TRAP activity extending up to 2.5 mm from the MOP was evident after 2 weeks, but not after 4 weeks. Vital fluorescence staining showed diffuse bone deposition on the experimental side up to 1.5 mm from the MOP margin. CONCLUSIONS When MOPs are performed in beagle dogs, demineralization is transient and healing of the injured area, as well as remineralization of bone affected by MOP placement, begins during the first 2 weeks. Although the transient effects extend farther, the principal effects extend only ∼1.5 mm from the MOP site.
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Affiliation(s)
| | - Phillip M Campbell
- Department of Orthodontics, Texas A&M University College of Dentistry, Dallas, Tex
| | - Lynne A Opperman
- Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, Tex
| | - Peter H Buschang
- Department of Orthodontics, Texas A&M University College of Dentistry, Dallas, Tex.
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Carney LO, Campbell PM, Spears R, Ceen RF, Melo AC, Buschang PH. Effects of pilot holes on longitudinal miniscrew stability and bony adaptation. Am J Orthod Dentofacial Orthop 2014; 146:554-64. [DOI: 10.1016/j.ajodo.2014.07.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Revised: 07/01/2014] [Accepted: 07/01/2014] [Indexed: 11/16/2022]
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Cha JY, Hwang CJ, Kwon SH, Jung HS, Kim KM, Yu HS. Strain of bone-implant interface and insertion torque regarding different miniscrew thread designs using an artificial bone model. Eur J Orthod 2014; 37:268-74. [PMID: 25296728 DOI: 10.1093/ejo/cju037] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVES To evaluate the initial stability of dual-thread miniscrews by analyzing the strain at the bone-implant interface and insertion torque during implantation in artificial bone models with different cortical bone thicknesses. MATERIALS AND METHODS Insertion torque, and strain, measured with a five-element strain gauge in 1.0, 1.5, and 2.0-mm artificial cortical bone, during insertion of single- (OAS-T1507) and dual-thread (MPlant-U3) type self-drilling miniscrews were assessed. RESULTS Both dual- and single-thread miniscrews showed greater than 7790 μstrain for all cortical bone thicknesses, and dual-thread miniscrews reached up to 19580 μstrain in 2.00 m m cortical bone. The strain of dual-thread miniscrews increased with increasing cortical bone thicknesses of 1.0-2.0mm. For single-thread miniscrews, the maximum insertion torque was relatively constant, but maximum insertion torque increased significantly in dual-thread groups with increasing cortical bone thicknesses (P < 0.0001). The maximum insertion torque with all cortical bone thicknesses was significantly lower with single- than dual-thread types (P < 0.0001). CONCLUSIONS Self-drilling dual-thread miniscrews provide better initial mechanical stability, but may cause strain over the physiological bone remodelling limit at the bone-implant interface in thick cortical bone layers.
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Affiliation(s)
- Jung-Yul Cha
- *Department of Orthodontics, Institute of Craniofacial Deformity, College of Dentistry, Yonsei University, Seoul, Korea
| | - Chung-Ju Hwang
- *Department of Orthodontics, Institute of Craniofacial Deformity, College of Dentistry, Yonsei University, Seoul, Korea
| | | | - Han-Sung Jung
- ***Department of Oral Biology, Division in Anatomy and Developmental Biology, Research Center for Orofacial Hard Tissue Regeneration and
| | - Kwang-Mahn Kim
- ****Department and Research Institute of Dental Biomaterials and Bioengineering, College of Dentistry, Yonsei University, Seoul, Korea
| | - Hyung Seog Yu
- *Department of Orthodontics, Institute of Craniofacial Deformity, College of Dentistry, Yonsei University, Seoul, Korea,
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Park JB, Kim EY, Paek J, Kook YA, Jeong DM, Cho IS, Nelson G. Primary stability of self-drilling and self-tapping mini-implant in tibia of diabetes-induced rabbits. Int J Dent 2014; 2014:429359. [PMID: 24949013 PMCID: PMC4037616 DOI: 10.1155/2014/429359] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Accepted: 04/19/2014] [Indexed: 11/18/2022] Open
Abstract
Objective. This study aimed to evaluate effects of type 1 diabetes mellitus and mini-implant placement method on the primary stability of mini-implants by comparing mechanical stability and microstructural/histological differences. Methods. After 4 weeks of diabetic induction, 48 mini-implants (24 self-tapping and 24 self-drilling implants) were placed on the tibia of 6 diabetic and 6 normal rabbits. After 4 weeks, the rabbits were sacrificed. Insertion torque, removal torque, insertion energy, and removal energy were measured with a surgical engine on 8 rabbits. Remaining 4 rabbits were analyzed by microcomputed tomography (micro-CT) and bone histomorphometry. Results. Total insertion energy was higher in self-drilling groups than self-tapping groups in both control and diabetic groups. Diabetic groups had more trabecular separation in bone marrow than the control groups in both SD and ST groups. Micro-CT analysis showed deterioration of bone quality in tibia especially in bone marrow of diabetic rabbits. However, there was no statistically significant correlation between self-drilling and self-tapping group for the remaining measurements in both control and diabetic groups. Conclusions. Type 1 diabetes mellitus and placement method of mini-implant did not affect primary stability of mini-implants.
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Affiliation(s)
- Jea-Beom Park
- Department of Orthodontics, The Catholic University of Korea, Seoul, Republic of Korea
| | - Eun-Young Kim
- Department of Dentistry, National Medical Center of Korea, 245 Euljiro, Junggu, Seoul 100-799, Republic of Korea
| | - Janghyun Paek
- Department of Pediatrics, School of Medicine, Chosun University, 30-1 Hakdong, Donggu, Gwangju 501-717, Republic of Korea
| | - Yoon-Ah Kook
- Department of Orthodontics, The Catholic University of Korea, Seoul, Republic of Korea
| | - Do-Min Jeong
- Department of Prosthodontics, School of Dentistry, Kyung Hee University, Hoegidong, Dongdaemungu, Seoul 130-701, Republic of Korea
| | - Il-Sik Cho
- Department of Dentistry, Korea University, 80 Gurodong, Gurogu, Seoul 152-703, Republic of Korea
| | - Gerald Nelson
- Division of Orthodontics, School of Dentistry, University of California San Francisco, 707 Parnasus Avenue, San Francisco, CA 94143, USA
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Kim JS, Choi SH, Cha SK, Kim JH, Lee HJ, Yeom SS, Hwang CJ. Comparison of success rates of orthodontic mini-screws by the insertion method. Korean J Orthod 2012; 42:242-8. [PMID: 23173117 PMCID: PMC3495255 DOI: 10.4041/kjod.2012.42.5.242] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2012] [Revised: 08/24/2012] [Accepted: 08/25/2012] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE The aim of this study was to compare the success rates of the manual and motor-driven mini-screw insertion methods according to age, gender, length of mini-screws, and insertion sites. METHODS We retrospectively reviewed 429 orthodontic mini-screw placements in 286 patients (102 in men and 327 in women) between 2005 and 2010 at private practice. Age, gender, mini-screw length, and insertion site were cross-tabulated against the insertion methods. The Cochran-Mantel-Haenszel test was performed to compare the success rates of the 2 insertion methods. RESULTS The motor-driven method was used for 228 mini-screws and the manual method for the remaining 201 mini-screws. The success rates were similar in both men and women irrespective of the insertion method used. With respect to mini-screw length, no difference in success rates was found between motor and hand drivers for the 6-mm-long mini-screws (68.1% and 69.5% with the engine driver and hand driver, respectively). However, the 8-mm-long mini-screws exhibited significantly higher success rates (90.4%, p < 0.01) than did the 6-mm-long mini-screws when placed with the engine driver. The overall success rate was also significantly higher in the maxilla (p < 0.05) when the engine driver was used. Success rates were similar among all age groups regardless of the insertion method used. CONCLUSIONS Taken together, the motor-driven insertion method can be helpful to get a higher success rate of orthodontic mini-screw placement.
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Affiliation(s)
| | - Seong Hwan Choi
- Department of Orthodontics, College of Dentistry and Institute of Craniofacial Deformity, Yonsei University, Seoul, Korea
| | | | | | | | | | - Chung Ju Hwang
- Department of Orthodontics, College of Dentistry and Institute of Craniofacial Deformity, Yonsei University, Seoul, Korea
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Novel application of the 2-piece orthodontic C-implant for temporary crown restoration after orthodontic treatment. Am J Orthod Dentofacial Orthop 2011; 140:569-79. [DOI: 10.1016/j.ajodo.2009.10.051] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2009] [Revised: 10/01/2009] [Accepted: 10/01/2009] [Indexed: 11/23/2022]
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Choi B, Lee DO, Mo SS, Kim SH, Park KH, Chung KR, Nelson G, Han SH. Three-dimensional finite element analysis for determining the stress distribution after loading the bone surface with two-component mini-implants of varying length. Korean J Orthod 2011. [DOI: 10.4041/kjod.2011.41.6.423] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- Bohm Choi
- Clinical Assistant Professor, Department of Prosthodontics, Yeouido St. Mary's Hospital, The Catholic University of Korea, Korea
| | | | - Sung-Seo Mo
- Associate Professor, Department of Orthodontics, Yeouido St. Mary's Hospital, The Catholic University of Korea, Korea
| | - Seong-Hun Kim
- Associate Professor, Department of Orthodontics, Yeouido St. Mary's Hospital, The Catholic University of Korea, Korea
| | - Ki-Ho Park
- Assistant Professor, Department of Orthodontics, School of Dentistry, Kyung Hee University, Korea
| | - Kyu-Rhim Chung
- Professor, Department of Orthodontics, School of Clinical Dental Scinece, Ajou University, Korea
| | - Gerald Nelson
- Clinical Professor, Department of Orofacial Science, University of California in San Francisco, USA
| | - Seong Ho Han
- Clinical Assistant Professor, Department of Orthodontics, St. Vincent Hospital, The Catholic University of Korea, Korea
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Kim SC, Kim HY, Lee SJ, Kim CM. Influence of surface treatment on the insertion pattern of self-drilling orthodontic mini-implants. ACTA ACUST UNITED AC 2011. [DOI: 10.4041/kjod.2011.41.4.268] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Sang-Cheol Kim
- Professor, Department of Orthodontics, School of Dentistry, Wonkwang University, Wonkwang Dental Research Institute, Korea
| | - Ho-Young Kim
- Graduate Student, Department of Orthodontics, School of Dentistry, Wonkwang University, Wonkwang Dental Research Institute, Korea
| | - Sang-Jae Lee
- Graduate Student, Department of Orthodontics, School of Dentistry, Wonkwang University, Wonkwang Dental Research Institute, Korea
| | - Cheol-Moon Kim
- Graduate Student, Department of Orthodontics, School of Dentistry, Wonkwang University, Wonkwang Dental Research Institute, Korea
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