The Effect of Dilation of Immature Pedicles on Pullout Strength of the Screws: Part 2: In Vivo Study
Experimental study. To evaluate the biomechanical stability of screws placed in expanded pedicles, and to compare those with the screws placed in the nonexpanded pedicles in an in vivo model. Pullout strength of a pedicle screw increases as the diameter of the screw gets larger. Small pedicles of pe...
Gespeichert in:
| Veröffentlicht in: | Spine (Philadelphia, Pa. 1976) Pa. 1976), 2009-10, Vol.34 (22), p.2378-2383 |
|---|---|
| Hauptverfasser: | , , , , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | 2383 |
|---|---|
| container_issue | 22 |
| container_start_page | 2378 |
| container_title | Spine (Philadelphia, Pa. 1976) |
| container_volume | 34 |
| creator | YILMAZ, Guney DEMIRKIRAN, Gokhan OZKAN, Cenk DAGLIOGLU, Kenan PEKMEZCI, Murat ALANAY, Ahmet YAZICI, Muharrem |
| description | Experimental study.
To evaluate the biomechanical stability of screws placed in expanded pedicles, and to compare those with the screws placed in the nonexpanded pedicles in an in vivo model.
Pullout strength of a pedicle screw increases as the diameter of the screw gets larger. Small pedicles of pediatric patients prevent the use of large size pedicle screws in this age group. As shown in an in vitro study one option to overcome this problem is to dilate and use larger screw in immature spine. But dilation reduces the pullout strength of pedicle screws in in vitro model.
Six-week-old 3 pigs were used. One of them was lost in the postoperative period. After posterior subperiosteal exposure of lumbar segments (L1-L5), 4.0 mm diameter and 20 mm long pedicle screws were placed on the left. The right pedicles were dilated with stainless steel dilators and instrumented with screws of same dimension. At the end of 3 months the pigs were killed and the pull out strength of each screw were measured.
The average pull out strength of the expanded and nonexpanded screws was 378.7 +/- 73 (542-308) Newton and 397 +/- 80 (535-289) Newton, respectively. There was no statistically significant difference between the 2 groups.
The biomechanical stability of the same size screws inserted at the expanded and nonexpanded pedicles are the same after 3 months. Even dilation of the pedicle decreases the pullout strength of the screw at the beginning, and the pull out strength of both sides became equal after 3 months. The remodeling capacity of pedicles and overgrowth of bone on screws may have an effect on this result. |
| doi_str_mv | 10.1097/BRS.0b013e3181b0bb9b |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_734090536</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>734090536</sourcerecordid><originalsourceid>FETCH-LOGICAL-c229t-143378d41fe3d1be0811c94be14fc6a579d4e1c99425bf6c0f5c45d5f6345fce3</originalsourceid><addsrcrecordid>eNpdkFtLHEEQRhtJ0I3JPwihX4JPo1V9mZ32LV6SLAhZXJPXobunOk6Yi3b3KP57Z3GJ4FMVxfm-gsPYZ4RjBLM8ObveHIMDlCSxQgfOGbfHFqhFVSBq844tQJaiEEqWB-xDSv8AoJRo9tkBmkoYoWHBmptb4pchkM98DPyi7Wxux2G7r_re5ikSX1PT-o4Sn-_rqevGKfNNjjT8zbdbMM8VGx_pMZ3ytY2Zi1O-Gvif9mGcual5-sjeB9sl-rSbh-z398ub85_F1a8fq_NvV4UXwuQClZTLqlEYSDboCCpEb5QjVMGXVi9No2i-GCW0C6WHoL3SjQ6lVDp4kofs6KX3Lo73E6Vc923y1HV2oHFK9VIqMKBlOZPqhfRxTClSqO9i29v4VCPUW731rLd-q3eOfdk9mFxPzWto53MGvu4Am7ztQrSDb9N_TghQoHQpnwHoKYN2</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>734090536</pqid></control><display><type>article</type><title>The Effect of Dilation of Immature Pedicles on Pullout Strength of the Screws: Part 2: In Vivo Study</title><source>MEDLINE</source><source>Journals@Ovid Complete</source><creator>YILMAZ, Guney ; DEMIRKIRAN, Gokhan ; OZKAN, Cenk ; DAGLIOGLU, Kenan ; PEKMEZCI, Murat ; ALANAY, Ahmet ; YAZICI, Muharrem</creator><creatorcontrib>YILMAZ, Guney ; DEMIRKIRAN, Gokhan ; OZKAN, Cenk ; DAGLIOGLU, Kenan ; PEKMEZCI, Murat ; ALANAY, Ahmet ; YAZICI, Muharrem</creatorcontrib><description>Experimental study.
To evaluate the biomechanical stability of screws placed in expanded pedicles, and to compare those with the screws placed in the nonexpanded pedicles in an in vivo model.
Pullout strength of a pedicle screw increases as the diameter of the screw gets larger. Small pedicles of pediatric patients prevent the use of large size pedicle screws in this age group. As shown in an in vitro study one option to overcome this problem is to dilate and use larger screw in immature spine. But dilation reduces the pullout strength of pedicle screws in in vitro model.
Six-week-old 3 pigs were used. One of them was lost in the postoperative period. After posterior subperiosteal exposure of lumbar segments (L1-L5), 4.0 mm diameter and 20 mm long pedicle screws were placed on the left. The right pedicles were dilated with stainless steel dilators and instrumented with screws of same dimension. At the end of 3 months the pigs were killed and the pull out strength of each screw were measured.
The average pull out strength of the expanded and nonexpanded screws was 378.7 +/- 73 (542-308) Newton and 397 +/- 80 (535-289) Newton, respectively. There was no statistically significant difference between the 2 groups.
The biomechanical stability of the same size screws inserted at the expanded and nonexpanded pedicles are the same after 3 months. Even dilation of the pedicle decreases the pullout strength of the screw at the beginning, and the pull out strength of both sides became equal after 3 months. The remodeling capacity of pedicles and overgrowth of bone on screws may have an effect on this result.</description><identifier>ISSN: 0362-2436</identifier><identifier>EISSN: 1528-1159</identifier><identifier>DOI: 10.1097/BRS.0b013e3181b0bb9b</identifier><identifier>PMID: 19829250</identifier><identifier>CODEN: SPINDD</identifier><language>eng</language><publisher>Hagerstown, MD: Lippincott Williams & Wilkins</publisher><subject>Age Factors ; Aging - physiology ; Animals ; Biological and medical sciences ; Biomechanical Phenomena - physiology ; Bone Development - physiology ; Bone Screws - adverse effects ; Bone Screws - standards ; Cerebrospinal fluid. Meninges. Spinal cord ; Child ; Equipment Failure ; Equipment Failure Analysis - methods ; Humans ; Medical sciences ; Models, Animal ; Nervous system (semeiology, syndromes) ; Neurology ; Neuropharmacology ; Neuroprotective agent ; Pharmacology. Drug treatments ; Postoperative Complications - etiology ; Postoperative Complications - physiopathology ; Postoperative Complications - prevention & control ; Spinal Fusion - instrumentation ; Spinal Fusion - methods ; Spine - anatomy & histology ; Spine - growth & development ; Spine - surgery ; Stress, Mechanical ; Sus scrofa ; Tensile Strength - physiology ; Weight-Bearing - physiology ; Wound Healing - physiology</subject><ispartof>Spine (Philadelphia, Pa. 1976), 2009-10, Vol.34 (22), p.2378-2383</ispartof><rights>2009 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c229t-143378d41fe3d1be0811c94be14fc6a579d4e1c99425bf6c0f5c45d5f6345fce3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=22040456$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/19829250$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>YILMAZ, Guney</creatorcontrib><creatorcontrib>DEMIRKIRAN, Gokhan</creatorcontrib><creatorcontrib>OZKAN, Cenk</creatorcontrib><creatorcontrib>DAGLIOGLU, Kenan</creatorcontrib><creatorcontrib>PEKMEZCI, Murat</creatorcontrib><creatorcontrib>ALANAY, Ahmet</creatorcontrib><creatorcontrib>YAZICI, Muharrem</creatorcontrib><title>The Effect of Dilation of Immature Pedicles on Pullout Strength of the Screws: Part 2: In Vivo Study</title><title>Spine (Philadelphia, Pa. 1976)</title><addtitle>Spine (Phila Pa 1976)</addtitle><description>Experimental study.
To evaluate the biomechanical stability of screws placed in expanded pedicles, and to compare those with the screws placed in the nonexpanded pedicles in an in vivo model.
Pullout strength of a pedicle screw increases as the diameter of the screw gets larger. Small pedicles of pediatric patients prevent the use of large size pedicle screws in this age group. As shown in an in vitro study one option to overcome this problem is to dilate and use larger screw in immature spine. But dilation reduces the pullout strength of pedicle screws in in vitro model.
Six-week-old 3 pigs were used. One of them was lost in the postoperative period. After posterior subperiosteal exposure of lumbar segments (L1-L5), 4.0 mm diameter and 20 mm long pedicle screws were placed on the left. The right pedicles were dilated with stainless steel dilators and instrumented with screws of same dimension. At the end of 3 months the pigs were killed and the pull out strength of each screw were measured.
The average pull out strength of the expanded and nonexpanded screws was 378.7 +/- 73 (542-308) Newton and 397 +/- 80 (535-289) Newton, respectively. There was no statistically significant difference between the 2 groups.
The biomechanical stability of the same size screws inserted at the expanded and nonexpanded pedicles are the same after 3 months. Even dilation of the pedicle decreases the pullout strength of the screw at the beginning, and the pull out strength of both sides became equal after 3 months. The remodeling capacity of pedicles and overgrowth of bone on screws may have an effect on this result.</description><subject>Age Factors</subject><subject>Aging - physiology</subject><subject>Animals</subject><subject>Biological and medical sciences</subject><subject>Biomechanical Phenomena - physiology</subject><subject>Bone Development - physiology</subject><subject>Bone Screws - adverse effects</subject><subject>Bone Screws - standards</subject><subject>Cerebrospinal fluid. Meninges. Spinal cord</subject><subject>Child</subject><subject>Equipment Failure</subject><subject>Equipment Failure Analysis - methods</subject><subject>Humans</subject><subject>Medical sciences</subject><subject>Models, Animal</subject><subject>Nervous system (semeiology, syndromes)</subject><subject>Neurology</subject><subject>Neuropharmacology</subject><subject>Neuroprotective agent</subject><subject>Pharmacology. Drug treatments</subject><subject>Postoperative Complications - etiology</subject><subject>Postoperative Complications - physiopathology</subject><subject>Postoperative Complications - prevention & control</subject><subject>Spinal Fusion - instrumentation</subject><subject>Spinal Fusion - methods</subject><subject>Spine - anatomy & histology</subject><subject>Spine - growth & development</subject><subject>Spine - surgery</subject><subject>Stress, Mechanical</subject><subject>Sus scrofa</subject><subject>Tensile Strength - physiology</subject><subject>Weight-Bearing - physiology</subject><subject>Wound Healing - physiology</subject><issn>0362-2436</issn><issn>1528-1159</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpdkFtLHEEQRhtJ0I3JPwihX4JPo1V9mZ32LV6SLAhZXJPXobunOk6Yi3b3KP57Z3GJ4FMVxfm-gsPYZ4RjBLM8ObveHIMDlCSxQgfOGbfHFqhFVSBq844tQJaiEEqWB-xDSv8AoJRo9tkBmkoYoWHBmptb4pchkM98DPyi7Wxux2G7r_re5ikSX1PT-o4Sn-_rqevGKfNNjjT8zbdbMM8VGx_pMZ3ytY2Zi1O-Gvif9mGcual5-sjeB9sl-rSbh-z398ub85_F1a8fq_NvV4UXwuQClZTLqlEYSDboCCpEb5QjVMGXVi9No2i-GCW0C6WHoL3SjQ6lVDp4kofs6KX3Lo73E6Vc923y1HV2oHFK9VIqMKBlOZPqhfRxTClSqO9i29v4VCPUW731rLd-q3eOfdk9mFxPzWto53MGvu4Am7ztQrSDb9N_TghQoHQpnwHoKYN2</recordid><startdate>20091015</startdate><enddate>20091015</enddate><creator>YILMAZ, Guney</creator><creator>DEMIRKIRAN, Gokhan</creator><creator>OZKAN, Cenk</creator><creator>DAGLIOGLU, Kenan</creator><creator>PEKMEZCI, Murat</creator><creator>ALANAY, Ahmet</creator><creator>YAZICI, Muharrem</creator><general>Lippincott Williams & Wilkins</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20091015</creationdate><title>The Effect of Dilation of Immature Pedicles on Pullout Strength of the Screws: Part 2: In Vivo Study</title><author>YILMAZ, Guney ; DEMIRKIRAN, Gokhan ; OZKAN, Cenk ; DAGLIOGLU, Kenan ; PEKMEZCI, Murat ; ALANAY, Ahmet ; YAZICI, Muharrem</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c229t-143378d41fe3d1be0811c94be14fc6a579d4e1c99425bf6c0f5c45d5f6345fce3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>Age Factors</topic><topic>Aging - physiology</topic><topic>Animals</topic><topic>Biological and medical sciences</topic><topic>Biomechanical Phenomena - physiology</topic><topic>Bone Development - physiology</topic><topic>Bone Screws - adverse effects</topic><topic>Bone Screws - standards</topic><topic>Cerebrospinal fluid. Meninges. Spinal cord</topic><topic>Child</topic><topic>Equipment Failure</topic><topic>Equipment Failure Analysis - methods</topic><topic>Humans</topic><topic>Medical sciences</topic><topic>Models, Animal</topic><topic>Nervous system (semeiology, syndromes)</topic><topic>Neurology</topic><topic>Neuropharmacology</topic><topic>Neuroprotective agent</topic><topic>Pharmacology. Drug treatments</topic><topic>Postoperative Complications - etiology</topic><topic>Postoperative Complications - physiopathology</topic><topic>Postoperative Complications - prevention & control</topic><topic>Spinal Fusion - instrumentation</topic><topic>Spinal Fusion - methods</topic><topic>Spine - anatomy & histology</topic><topic>Spine - growth & development</topic><topic>Spine - surgery</topic><topic>Stress, Mechanical</topic><topic>Sus scrofa</topic><topic>Tensile Strength - physiology</topic><topic>Weight-Bearing - physiology</topic><topic>Wound Healing - physiology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>YILMAZ, Guney</creatorcontrib><creatorcontrib>DEMIRKIRAN, Gokhan</creatorcontrib><creatorcontrib>OZKAN, Cenk</creatorcontrib><creatorcontrib>DAGLIOGLU, Kenan</creatorcontrib><creatorcontrib>PEKMEZCI, Murat</creatorcontrib><creatorcontrib>ALANAY, Ahmet</creatorcontrib><creatorcontrib>YAZICI, Muharrem</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Spine (Philadelphia, Pa. 1976)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>YILMAZ, Guney</au><au>DEMIRKIRAN, Gokhan</au><au>OZKAN, Cenk</au><au>DAGLIOGLU, Kenan</au><au>PEKMEZCI, Murat</au><au>ALANAY, Ahmet</au><au>YAZICI, Muharrem</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The Effect of Dilation of Immature Pedicles on Pullout Strength of the Screws: Part 2: In Vivo Study</atitle><jtitle>Spine (Philadelphia, Pa. 1976)</jtitle><addtitle>Spine (Phila Pa 1976)</addtitle><date>2009-10-15</date><risdate>2009</risdate><volume>34</volume><issue>22</issue><spage>2378</spage><epage>2383</epage><pages>2378-2383</pages><issn>0362-2436</issn><eissn>1528-1159</eissn><coden>SPINDD</coden><abstract>Experimental study.
To evaluate the biomechanical stability of screws placed in expanded pedicles, and to compare those with the screws placed in the nonexpanded pedicles in an in vivo model.
Pullout strength of a pedicle screw increases as the diameter of the screw gets larger. Small pedicles of pediatric patients prevent the use of large size pedicle screws in this age group. As shown in an in vitro study one option to overcome this problem is to dilate and use larger screw in immature spine. But dilation reduces the pullout strength of pedicle screws in in vitro model.
Six-week-old 3 pigs were used. One of them was lost in the postoperative period. After posterior subperiosteal exposure of lumbar segments (L1-L5), 4.0 mm diameter and 20 mm long pedicle screws were placed on the left. The right pedicles were dilated with stainless steel dilators and instrumented with screws of same dimension. At the end of 3 months the pigs were killed and the pull out strength of each screw were measured.
The average pull out strength of the expanded and nonexpanded screws was 378.7 +/- 73 (542-308) Newton and 397 +/- 80 (535-289) Newton, respectively. There was no statistically significant difference between the 2 groups.
The biomechanical stability of the same size screws inserted at the expanded and nonexpanded pedicles are the same after 3 months. Even dilation of the pedicle decreases the pullout strength of the screw at the beginning, and the pull out strength of both sides became equal after 3 months. The remodeling capacity of pedicles and overgrowth of bone on screws may have an effect on this result.</abstract><cop>Hagerstown, MD</cop><pub>Lippincott Williams & Wilkins</pub><pmid>19829250</pmid><doi>10.1097/BRS.0b013e3181b0bb9b</doi><tpages>6</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0362-2436 |
| ispartof | Spine (Philadelphia, Pa. 1976), 2009-10, Vol.34 (22), p.2378-2383 |
| issn | 0362-2436 1528-1159 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_734090536 |
| source | MEDLINE; Journals@Ovid Complete |
| subjects | Age Factors Aging - physiology Animals Biological and medical sciences Biomechanical Phenomena - physiology Bone Development - physiology Bone Screws - adverse effects Bone Screws - standards Cerebrospinal fluid. Meninges. Spinal cord Child Equipment Failure Equipment Failure Analysis - methods Humans Medical sciences Models, Animal Nervous system (semeiology, syndromes) Neurology Neuropharmacology Neuroprotective agent Pharmacology. Drug treatments Postoperative Complications - etiology Postoperative Complications - physiopathology Postoperative Complications - prevention & control Spinal Fusion - instrumentation Spinal Fusion - methods Spine - anatomy & histology Spine - growth & development Spine - surgery Stress, Mechanical Sus scrofa Tensile Strength - physiology Weight-Bearing - physiology Wound Healing - physiology |
| title | The Effect of Dilation of Immature Pedicles on Pullout Strength of the Screws: Part 2: In Vivo Study |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-04T12%3A20%3A44IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=The%20Effect%20of%20Dilation%20of%20Immature%20Pedicles%20on%20Pullout%20Strength%20of%20the%20Screws:%20Part%202:%20In%20Vivo%20Study&rft.jtitle=Spine%20(Philadelphia,%20Pa.%201976)&rft.au=YILMAZ,%20Guney&rft.date=2009-10-15&rft.volume=34&rft.issue=22&rft.spage=2378&rft.epage=2383&rft.pages=2378-2383&rft.issn=0362-2436&rft.eissn=1528-1159&rft.coden=SPINDD&rft_id=info:doi/10.1097/BRS.0b013e3181b0bb9b&rft_dat=%3Cproquest_cross%3E734090536%3C/proquest_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=734090536&rft_id=info:pmid/19829250&rfr_iscdi=true |