Morphologic Changes of the Nasopalatine Canal Related to Dental Implantation : A Radiologic Study in Different Degrees of Absorbed Maxillae
Identifieur interne : 000343 ( PascalFrancis/Checkpoint ); précédent : 000342; suivant : 000344Morphologic Changes of the Nasopalatine Canal Related to Dental Implantation : A Radiologic Study in Different Degrees of Absorbed Maxillae
Auteurs : Ofer Mardinger [Israël] ; Noa Namani-Sadan [Israël] ; Gavriel Chaushu [Israël] ; Devorah Schwartz-Arad [Israël]Source :
- Journal of periodontology [ 0022-3492 ] ; 2008.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Anatomie.
English descriptors
Abstract
Background: Implant rehabilitation of the edentulous anterior maxilla remains a complex restorative challenge. Intricate preexisting anatomy dictates meticulous and accurate osteotomy planning. With progressive bone loss, the alveolar crest may approach anatomic structures. The nasopalatine nerve and vessels may ultimately emerge from the ridge crest. The radiologic changes of the nasopalatine canal were evaluated in different resorption phases of the premaxilla alveolus with regard to dental implantation. Methods: The study consisted of 207 subjects who had maxillary computed tomography scans before dental implantation. The Lekholm and Zarb classification was used to divide images according to the residual bony ridge: Class A (control group) and classes B to E (study group). Anatomic mapping of the nasopalatine canal structure was carried out in both groups. Results: The canal diameter was wider along the degree of ridge resorption from classes A to E in all dimensions, mainly in the palatal opening (P<0.01), middle area (P<0.001), and nasal area. The mean diameter of the enlargement was 1.8 mm, which reached 5.5 ± 1.08 mm (P<0.01) in type E bone. In the severely resorbed ridges (classes C through E), when the palatal opening was situated on the ridge, it occupied a mean of 35.6% (13% to 58%) of the area devoted to implant placement. Tooth loss was the main reason for ridge resorption (P<0.01). Conclusions: Canal diameter enlargement was greater anteriorly to the ridge and posteriorly to the palatal bone, mainly because of tooth extraction. The atrophy of disuse may influence surrounding structures, similar to the maxillary sinus tendency to expand into surrounding bone mainly after tooth loss.
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aut.</sZ></inist:fA14><country>Israël</country><wicri:noRegion>Tel Aviv</wicri:noRegion></affiliation></author><author><name sortKey="Schwartz Arad, Devorah" sort="Schwartz Arad, Devorah" uniqKey="Schwartz Arad D" first="Devorah" last="Schwartz-Arad">Devorah Schwartz-Arad</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Oral and Maxillofacial Surgery, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University</s1><s2>Tel Aviv</s2><s3>ISR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Israël</country><wicri:noRegion>Tel Aviv</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">08-0457986</idno><date when="2008">2008</date><idno type="stanalyst">PASCAL 08-0457986 INIST</idno><idno type="RBID">Pascal:08-0457986</idno><idno type="wicri:Area/PascalFrancis/Corpus">000341</idno><idno 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i1="02"><s1>The Unit of Oral and Maxillofacial Surgery, Sapir Medical Center</s1><s2>Kfar Saba</s2><s3>ISR</s3><sZ>1 aut.</sZ></inist:fA14><country>Israël</country><wicri:noRegion>Kfar Saba</wicri:noRegion></affiliation></author><author><name sortKey="Namani Sadan, Noa" sort="Namani Sadan, Noa" uniqKey="Namani Sadan N" first="Noa" last="Namani-Sadan">Noa Namani-Sadan</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Oral and Maxillofacial Surgery, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University</s1><s2>Tel Aviv</s2><s3>ISR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Israël</country><wicri:noRegion>Tel Aviv</wicri:noRegion></affiliation></author><author><name sortKey="Chaushu, Gavriel" sort="Chaushu, Gavriel" uniqKey="Chaushu G" first="Gavriel" last="Chaushu">Gavriel Chaushu</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Oral and Maxillofacial Surgery, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University</s1><s2>Tel Aviv</s2><s3>ISR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Israël</country><wicri:noRegion>Tel Aviv</wicri:noRegion></affiliation></author><author><name sortKey="Schwartz Arad, Devorah" sort="Schwartz Arad, Devorah" uniqKey="Schwartz Arad D" first="Devorah" last="Schwartz-Arad">Devorah Schwartz-Arad</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Oral and Maxillofacial Surgery, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University</s1><s2>Tel Aviv</s2><s3>ISR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Israël</country><wicri:noRegion>Tel Aviv</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Journal of periodontology</title><title level="j" type="abbreviated">J. periodontol.</title><idno type="ISSN">0022-3492</idno><imprint><date when="2008">2008</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of periodontology</title><title level="j" type="abbreviated">J. periodontol.</title><idno type="ISSN">0022-3492</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Anatomy</term><term>Atrophy</term><term>Dentistry</term><term>Implant</term><term>Implantation</term><term>Maxillary</term><term>Tooth</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Atrophie</term><term>Dent</term><term>Implantation</term><term>Maxillaire</term><term>Anatomie</term><term>Implant</term><term>Dentisterie</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Anatomie</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Background: Implant rehabilitation of the edentulous anterior maxilla remains a complex restorative challenge. Intricate preexisting anatomy dictates meticulous and accurate osteotomy planning. With progressive bone loss, the alveolar crest may approach anatomic structures. The nasopalatine nerve and vessels may ultimately emerge from the ridge crest. The radiologic changes of the nasopalatine canal were evaluated in different resorption phases of the premaxilla alveolus with regard to dental implantation. Methods: The study consisted of 207 subjects who had maxillary computed tomography scans before dental implantation. The Lekholm and Zarb classification was used to divide images according to the residual bony ridge: Class A (control group) and classes B to E (study group). Anatomic mapping of the nasopalatine canal structure was carried out in both groups. Results: The canal diameter was wider along the degree of ridge resorption from classes A to E in all dimensions, mainly in the palatal opening (P<0.01), middle area (P<0.001), and nasal area. The mean diameter of the enlargement was 1.8 mm, which reached 5.5 ± 1.08 mm (P<0.01) in type E bone. In the severely resorbed ridges (classes C through E), when the palatal opening was situated on the ridge, it occupied a mean of 35.6% (13% to 58%) of the area devoted to implant placement. Tooth loss was the main reason for ridge resorption (P<0.01). Conclusions: Canal diameter enlargement was greater anteriorly to the ridge and posteriorly to the palatal bone, mainly because of tooth extraction. The atrophy of disuse may influence surrounding structures, similar to the maxillary sinus tendency to expand into surrounding bone mainly after tooth loss.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0022-3492</s0></fA01><fA03 i2="1"><s0>J. periodontol.</s0></fA03><fA05><s2>79</s2></fA05><fA06><s2>9</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Morphologic Changes of the Nasopalatine Canal Related to Dental Implantation : A Radiologic Study in Different Degrees of Absorbed Maxillae</s1></fA08><fA11 i1="01" i2="1"><s1>MARDINGER (Ofer)</s1></fA11><fA11 i1="02" i2="1"><s1>NAMANI-SADAN (Noa)</s1></fA11><fA11 i1="03" i2="1"><s1>CHAUSHU (Gavriel)</s1></fA11><fA11 i1="04" i2="1"><s1>SCHWARTZ-ARAD (Devorah)</s1></fA11><fA14 i1="01"><s1>Department of Oral and Maxillofacial Surgery, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University</s1><s2>Tel Aviv</s2><s3>ISR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></fA14><fA14 i1="02"><s1>The Unit of Oral and Maxillofacial Surgery, Sapir Medical Center</s1><s2>Kfar Saba</s2><s3>ISR</s3><sZ>1 aut.</sZ></fA14><fA20><s1>1659-1662</s1></fA20><fA21><s1>2008</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>874</s2><s5>354000185759520070</s5></fA43><fA44><s0>0000</s0><s1>© 2008 INIST-CNRS. 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The Lekholm and Zarb classification was used to divide images according to the residual bony ridge: Class A (control group) and classes B to E (study group). Anatomic mapping of the nasopalatine canal structure was carried out in both groups. Results: The canal diameter was wider along the degree of ridge resorption from classes A to E in all dimensions, mainly in the palatal opening (P<0.01), middle area (P<0.001), and nasal area. The mean diameter of the enlargement was 1.8 mm, which reached 5.5 ± 1.08 mm (P<0.01) in type E bone. In the severely resorbed ridges (classes C through E), when the palatal opening was situated on the ridge, it occupied a mean of 35.6% (13% to 58%) of the area devoted to implant placement. Tooth loss was the main reason for ridge resorption (P<0.01). Conclusions: Canal diameter enlargement was greater anteriorly to the ridge and posteriorly to the palatal bone, mainly because of tooth extraction. 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