Survival and success rate of one-piece implant inserted in molar sites
Identifieur interne : 002B71 ( Pmc/Corpus ); précédent : 002B70; suivant : 002B72Survival and success rate of one-piece implant inserted in molar sites
Auteurs : Francesco CarinciSource :
- Dental Research Journal [ 1735-3327 ] ; 2012.
Abstract
Recently, the use of one-piece implants (OPI) has become more popular. Since no reports specifically focus on OPIs inserted in molar areas, a retrospective study has been performed.
A series of 36 OPIs (Diamond; BIOIMPLANT, Milan, Italy) were inserted into the molar area of patients admitted at the Dental Clinic, University of Chieti, Italy, for oral rehabilitation between January and December 2010.
In our series survival rate (SVR) and success rate (SCR) were 91.7% and 97%, respectively. Statistical analysis demonstrated that no studied variable has an impact on survival (i.e., lost implants) as well as on clinical success (i.e., crestal bone resorption).
OPIs are reliable devices for oral rehabilitation in the molar areas.
Url:
DOI: 10.4103/1735-3327.109730
PubMed: 23814575
PubMed Central: 3692165
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PMC:3692165Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Survival and success rate of one-piece implant inserted in molar sites</title><author><name sortKey="Carinci, Francesco" sort="Carinci, Francesco" uniqKey="Carinci F" first="Francesco" last="Carinci">Francesco Carinci</name><affiliation><nlm:aff id="aff1">Department of Medical-Surgical Sciences of Communication and Behavior, Section of Maxillofacial and Plastic Surgery, University of Ferrara, Ferrara, Italy</nlm:aff></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">23814575</idno><idno type="pmc">3692165</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3692165</idno><idno type="RBID">PMC:3692165</idno><idno type="doi">10.4103/1735-3327.109730</idno><date when="2012">2012</date><idno type="wicri:Area/Pmc/Corpus">002B71</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">002B71</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Survival and success rate of one-piece implant inserted in molar sites</title><author><name sortKey="Carinci, Francesco" sort="Carinci, Francesco" uniqKey="Carinci F" first="Francesco" last="Carinci">Francesco Carinci</name><affiliation><nlm:aff id="aff1">Department of Medical-Surgical Sciences of Communication and Behavior, Section of Maxillofacial and Plastic Surgery, University of Ferrara, Ferrara, Italy</nlm:aff></affiliation></author></analytic><series><title level="j">Dental Research Journal</title><idno type="ISSN">1735-3327</idno><idno type="eISSN">2008-0255</idno><imprint><date when="2012">2012</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec id="st1"><title>Background:</title><p>Recently, the use of one-piece implants (OPI) has become more popular. Since no reports specifically focus on OPIs inserted in molar areas, a retrospective study has been performed.</p></sec><sec id="st2"><title>Materials and Methods:</title><p>A series of 36 OPIs (Diamond; BIOIMPLANT, Milan, Italy) were inserted into the molar area of patients admitted at the Dental Clinic, University of Chieti, Italy, for oral rehabilitation between January and December 2010.</p></sec><sec id="st3"><title>Results:</title><p>In our series survival rate (SVR) and success rate (SCR) were 91.7% and 97%, respectively. Statistical analysis demonstrated that no studied variable has an impact on survival (i.e., lost implants) as well as on clinical success (i.e., crestal bone resorption).</p></sec><sec id="st4"><title>Conclusion:</title><p>OPIs are reliable devices for oral rehabilitation in the molar areas.</p></sec></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Fugazzotto, Pa" uniqKey="Fugazzotto P">PA Fugazzotto</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Cafiero, C" uniqKey="Cafiero C">C Cafiero</name></author><author><name sortKey="Annibali, S" uniqKey="Annibali S">S Annibali</name></author><author><name sortKey="Gherlone, E" uniqKey="Gherlone E">E Gherlone</name></author><author><name sortKey="Grassi, Fr" uniqKey="Grassi F">FR Grassi</name></author><author><name sortKey="Gualini, F" uniqKey="Gualini F">F Gualini</name></author><author><name sortKey="Magliano, A" uniqKey="Magliano A">A 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<front><journal-meta><journal-id journal-id-type="nlm-ta">Dent Res J (Isfahan)</journal-id><journal-id journal-id-type="iso-abbrev">Dent Res J (Isfahan)</journal-id><journal-id journal-id-type="publisher-id">DRJ</journal-id><journal-title-group><journal-title>Dental Research Journal</journal-title></journal-title-group><issn pub-type="ppub">1735-3327</issn><issn pub-type="epub">2008-0255</issn><publisher><publisher-name>Medknow Publications & Media Pvt Ltd</publisher-name><publisher-loc>India</publisher-loc></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">23814575</article-id><article-id pub-id-type="pmc">3692165</article-id><article-id pub-id-type="publisher-id">DRJ-9-155</article-id><article-id pub-id-type="doi">10.4103/1735-3327.109730</article-id><article-categories><subj-group subj-group-type="heading"><subject>Original Article</subject></subj-group></article-categories><title-group><article-title>Survival and success rate of one-piece implant inserted in molar sites</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Carinci</surname><given-names>Francesco</given-names></name><xref ref-type="aff" rid="aff1">1</xref><xref ref-type="corresp" rid="cor1"></xref></contrib></contrib-group><aff id="aff1"><label>1</label>Department of Medical-Surgical Sciences of Communication and Behavior, Section of Maxillofacial and Plastic Surgery, University of Ferrara, Ferrara, Italy</aff><author-notes><corresp id="cor1"><bold>Address for correspondence:</bold> Prof. Francesco Carinci, Department of D.M.C.C.C., Section of Maxillofacial and Plastic Surgery, University of Ferrara, Corso Giovecca 203, Ferrara 44100, Italy. <bold>E-mail:</bold><email xlink:href="crc@unife.it">crc@unife.it</email></corresp></author-notes><pub-date pub-type="ppub"><month>12</month><year>2012</year></pub-date><volume>9</volume><issue>Suppl 2</issue><fpage>S155</fpage><lpage>S159</lpage><history><date date-type="received"><month>6</month><year>2012</year></date><date date-type="accepted"><month>10</month><year>2012</year></date></history><permissions><copyright-statement>Copyright: © Dental Research Journal</copyright-statement><copyright-year>2012</copyright-year><license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by-nc-sa/3.0"><license-p>This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.</license-p></license></permissions><abstract><sec id="st1"><title>Background:</title><p>Recently, the use of one-piece implants (OPI) has become more popular. Since no reports specifically focus on OPIs inserted in molar areas, a retrospective study has been performed.</p></sec><sec id="st2"><title>Materials and Methods:</title><p>A series of 36 OPIs (Diamond; BIOIMPLANT, Milan, Italy) were inserted into the molar area of patients admitted at the Dental Clinic, University of Chieti, Italy, for oral rehabilitation between January and December 2010.</p></sec><sec id="st3"><title>Results:</title><p>In our series survival rate (SVR) and success rate (SCR) were 91.7% and 97%, respectively. Statistical analysis demonstrated that no studied variable has an impact on survival (i.e., lost implants) as well as on clinical success (i.e., crestal bone resorption).</p></sec><sec id="st4"><title>Conclusion:</title><p>OPIs are reliable devices for oral rehabilitation in the molar areas.</p></sec></abstract><kwd-group><kwd>Bone</kwd><kwd>fixture</kwd><kwd>immediate loading</kwd><kwd>implant</kwd><kwd>one-piece</kwd><kwd>welding</kwd></kwd-group></article-meta></front><body><sec id="sec1-1"><title>INTRODUCTION</title><p>Two-piece implants inserted into molar areas are predicable tools for oral rehabilitation. In 2008 Fugazzotto[<xref ref-type="bibr" rid="ref1">1</xref>] reported a series of implants placed at the time of maxillary molar extraction. A total of 391 were reviewed and followed for up to a mean of 40 months. The cumulative survival rate was 99.5%. In a subsequent study, the same author[<xref ref-type="bibr" rid="ref1">1</xref>] reported the clinical outcome of 341 implants placed into the mandible at the time of molar extraction. Concomitant regenerative therapy was performed around 332 of the placed implants. One implant was mobile 3 weeks post insertion. A second implant was lost after 30 months in function. All other implants were stable at the time of uncover 3-7 months post insertion. A total of 339 implants have been in function for up to 6 years, with a mean time in function of 30 months, yielding a cumulative survival rate of 99.1%.</p><p>The ITI Study Group Italia[<xref ref-type="bibr" rid="ref2">2</xref>] assessed the clinical and radiographic outcomes of immediate transmucosal implant placement into molar extraction sockets. A 12-month multicenter prospective cohort study was performed. Following molar extraction, implants were immediately placed into the sockets. Molars with evidence of acute peri-apical pathology were excluded. After implant placement and achievement of primary stability, flaps were repositioned and sutured allowing non-submerged, transmucosal healing. Peri-implant marginal defects were treated according to the principles of guided bone regeneration (GBR) by means of de-proteinized bovine bone mineral particles in conjunction with a bio-resorbable collagen membrane. Standardized radiographs were obtained at baseline and 12 months thereafter. Changes in depth and width of the distance from the implant shoulder and from the alveolar crest to the bottom of the defect were assessed. Eighty-two patients were enrolled and followed for 12 months. Extraction sites displayed sufficient residual bone volume to allow primary stability of all implants. Sixty-four percent of the implants were placed in the areas of 36 and 46. GBR was used in conjunction with the placement of all implants. No post-surgical complications were observed. All implants healed uneventfully yielding a survival rate of 100% and healthy soft tissue conditions after 12 months. The authors concluded that immediate transmucosal implant placement represented a predictable treatment option for replacement of mandibular and maxillary molars.</p><p>Matarasso, <italic>et al</italic>.[<xref ref-type="bibr" rid="ref3">3</xref>] studied the dimensional ridge alterations following immediate implant placement in molar extraction sites. Twelve subjects received 12 immediate transmucosal implants in molar extraction sites. Peri-implant defects were treated according to the principles of GBR by means of a de-proteinized bone substitute and a bio-resorbable collagen membrane. Changes in vertical and horizontal distances of alveolar bony walls to the bottom of the defects and to the implant surfaces were compared between implant placement and surgical re-entry at 6 months. The implant survival rate at 6 months was 100%. Statistically significant differences were observed in the mean changes in vertical distances between baseline and re-entry. At re-entry, all peri-implant marginal defects assessed from the internal socket wall to the implant surface were healed. The authors concluded that the marginal defects around immediate implants placed in molar extraction sites were completely filled after 6 months of healing through <italic>de novo</italic> bone formation.</p><p>Acocella, <italic>et al</italic>.[<xref ref-type="bibr" rid="ref4">4</xref>] evaluated the predictability a modified implant insertion at the time of maxillary molar extraction. Sixty-eight patients with a total of 68 teeth scheduled for tooth extraction and immediate implant placement into fresh sockets were included. Implants were positioned just after teeth removal and, in case of necessity, a regenerative therapy was performed at the same time. After a 3-month period of healing, implants were restored with single crown fixed prostheses. All implants restored with single crowns were monitored for 36 months; only three implants failed with a cumulative survival rate of 97.96%. The authors concluded that the combination of a traumatic extraction of maxillary molars, sufficient residual inter-radicular bone, and use of appropriate regenerative material at the time of implant insertion represents a predictable long-term treatment. Lauritano and co-workers[<xref ref-type="bibr" rid="ref5">5</xref><xref ref-type="bibr" rid="ref6">6</xref><xref ref-type="bibr" rid="ref7">7</xref>] focused on possible consequences of a peri-implantitis disease caused by bacteria on the stability of the implant. Previously we reported the effectiveness on a new type of one-piece implants (OPI) (Diamond; BIOIMPLANT, Milan, Italy) for oral rehabilitation.[<xref ref-type="bibr" rid="ref8">8</xref><xref ref-type="bibr" rid="ref9">9</xref><xref ref-type="bibr" rid="ref10">10</xref><xref ref-type="bibr" rid="ref11">11</xref><xref ref-type="bibr" rid="ref12">12</xref><xref ref-type="bibr" rid="ref13">13</xref><xref ref-type="bibr" rid="ref14">14</xref>] Moreover, we demonstrated that spiral family implants can be used successfully in low bone.[<xref ref-type="bibr" rid="ref15">15</xref>]</p><p>Since OPIs became more and more popular and no reports specifically focus on their outcome in molar areas, a retrospective study is performed.</p></sec><sec sec-type="materials|methods" id="sec1-2"><title>MATERIALS AND METHODS</title><sec id="sec2-1"><title>Study design/sample</title><p>To address the research purpose, the investigators designed a retrospective cohort study. The study population was composed of patients admitted at the Dental Clinic, University of Chieti, Italy, for evaluation and implant treatment, between January and December 2010, as reported previously.[<xref ref-type="bibr" rid="ref8">8</xref><xref ref-type="bibr" rid="ref9">9</xref><xref ref-type="bibr" rid="ref10">10</xref><xref ref-type="bibr" rid="ref11">11</xref><xref ref-type="bibr" rid="ref12">12</xref><xref ref-type="bibr" rid="ref13">13</xref><xref ref-type="bibr" rid="ref14">14</xref>]</p><p>Subjects were screened according to the following inclusion criteria: Controlled oral hygiene and absence of any lesions in the oral cavity; in addition, the patients had to agree to participate in a post-operative check-up program.</p><p>The exclusion criteria were as follows: Bruxists; smoking more than 20 cigarettes per day; consumption of alcohol more than 2 glasses of wine per day; localized radiation therapy of the oral cavity; antitumor chemotherapy; liver, blood, and kidney diseases; immunosuppression; patients on corticosteroids; pregnant women; and inflammatory and autoimmune diseases of the oral cavity.</p></sec><sec id="sec2-2"><title>Variables</title><p>Several variables are investigated: Demographic (age and gender), anatomic (tooth site, distance between implants), implant (length and diameter), and prosthetic (welding procedure) variables.</p><p>Primary and secondary predictors of clinical outcome were used. The primary predictor is the presence/absence of the implant at the end of the observation period. It is defined as survival rate (i.e., SVR) that is the total number of implants still in place at the end of the follow-up period.</p><p>The second predictor of outcome was the peri-implant bone resorption. It is defined as implant success rate (SCR) and it is evaluated according to the absence of persisting peri-implant bone resorption greater than 1.5 mm during the first year of loading and 0.2 mm per year during the following years.[<xref ref-type="bibr" rid="ref16">16</xref>]</p></sec><sec id="sec2-3"><title>Data collection methods</title><p>Data were collected as reported previously.[<xref ref-type="bibr" rid="ref8">8</xref><xref ref-type="bibr" rid="ref9">9</xref><xref ref-type="bibr" rid="ref10">10</xref><xref ref-type="bibr" rid="ref11">11</xref><xref ref-type="bibr" rid="ref12">12</xref><xref ref-type="bibr" rid="ref13">13</xref><xref ref-type="bibr" rid="ref14">14</xref>]</p></sec><sec id="sec2-4"><title>Surgical protocol</title><p>All patients underwent the same surgical protocol.[<xref ref-type="bibr" rid="ref8">8</xref><xref ref-type="bibr" rid="ref9">9</xref><xref ref-type="bibr" rid="ref10">10</xref><xref ref-type="bibr" rid="ref11">11</xref><xref ref-type="bibr" rid="ref12">12</xref><xref ref-type="bibr" rid="ref13">13</xref><xref ref-type="bibr" rid="ref14">14</xref>]</p></sec><sec id="sec2-5"><title>Data analysis</title><p>Pearson χ<sup>2</sup>-test was used to detect if implant position has an impact both on failures (i.e., lost fixtures) and/or on success (i.e., crestal bone resorption around implants smaller than 1.5 mm).</p></sec></sec><sec sec-type="results" id="sec1-3"><title>RESULTS</title><p>Nineteen patients (10 females and 9 males) with a median age of 62 years (min.-max., 43-80 years) were enrolled. The mean follow-up was 7 months. A total of 176 OPIs (Diamond; BIOIMPLANT) were inserted [<xref ref-type="fig" rid="F1">Figure 1</xref>]. Among them 36 fixtures were inserted into the molar area. A total of 1, 6, and 29 implants had a diameter narrower than, equal to, and wider than 4 mm, respectively. A total of 20, 7, and 9 fixtures were shorter than, equal to, and longer than 13 mm, respectively. Twenty implants were placed into the mandible and 16 into the maxilla; 17 in females and 19 in males; and 26 were welded. The mean observation period, patient’ age, inter-implant distance, and peri-implant bone resorption per implant were 8 ± 6 months (min.-max., 1-26 months), 65 ± 11 years (min.-max., 43-76 years), 3.7 ± 1.7 mm (min.-max., 1.1-8.3 mm), and 0.2 ± 0.7 (min.-max., −1.7-1.8 mm), respectively. Pearson χ<sup>2</sup>-test was used to detect if implant site had an impact both on failures (SVR, i.e., lost fixtures) and/or on success (SCR, i.e., crestal bone resorption around implants lower than 1.5 mm).</p><fig id="F1" position="float"><label>Figure 1</label><caption><p>Different diameters of drill</p></caption><graphic xlink:href="DRJ-9-155-g001"></graphic></fig><p>Three implants were lost in the post-operative period (within 3 months) and one had a peri-implant bone resorption area wider than 1.5 mm; thus SVR and SCR were 91.7% and 97%, respectively. Statistical analysis demonstrated that no studied variable had an impact on survival (i.e., lost implants) as well as on clinical success (i.e., crestal bone resorption).</p></sec><sec sec-type="discussion" id="sec1-4"><title>DISCUSSION</title><p>Few articles focus on implants inserted in molar sites[<xref ref-type="bibr" rid="ref17">17</xref><xref ref-type="bibr" rid="ref18">18</xref><xref ref-type="bibr" rid="ref19">19</xref><xref ref-type="bibr" rid="ref20">20</xref><xref ref-type="bibr" rid="ref21">21</xref>] and none on OPIs. In addition to previously reported articles,[<xref ref-type="bibr" rid="ref17">17</xref><xref ref-type="bibr" rid="ref18">18</xref><xref ref-type="bibr" rid="ref19">19</xref><xref ref-type="bibr" rid="ref20">20</xref><xref ref-type="bibr" rid="ref21">21</xref>] Annibali, <italic>et al</italic>.[<xref ref-type="bibr" rid="ref22">22</xref>] reported a series of patients treated consecutively for first molar replacement according to unconventional (immediate = Group 1, early = Group 2) or conventional (late = Group 3) surgical protocols. Peri-apical radiographs obtained upon delivery of the definitive crown and 1 year later were digitized and assessed to evaluate marginal bone loss (MBL). Clinical photographs were evaluated to determine soft tissue health. Forty-seven patients were treated, with a total of 53 immediate, early, or late single implants. The implant survival rate was 100% for all groups. The success rate was 91.7% for early implants, 95.0% for immediate post-extraction implants, and 100% for implants placed in healed sites. MBL and soft tissue parameters did not differ significantly among the three groups at definitive restoration delivery or 1 year later; a thin gingival biotype, irrespective of treatment timing, was the only covariate that was able to slightly affect the outcome variables. The authors concluded that short-term implant survival and success rates, as well as MBL values for immediate, early, and conventional implants, appear similar for maxillary and mandibular first molar sites. Freitas-Junior, <italic>et al</italic>.[<xref ref-type="bibr" rid="ref23">23</xref>] tested the reliability and failure modes of molar crowns supported by three different implant-supported designs.</p><p>There were the following groups: Group 1, one standard-diameter implant (3.75 mm); Group 2, one narrow-diameter implant (3 mm); and Group 3, two narrow-diameter implants (3 mm). Loads were applied as mouth-motion cycles using a step-stress accelerated life-testing method. Abutment screw failure was the chief failure mode. Strength and reliability were significantly higher for Groups 1 and 3 compared with Group 2.</p><p>Urban, <italic>et al</italic>.[<xref ref-type="bibr" rid="ref24">24</xref>] identified risk factors for early failure of immediately placed implants in molar regions associated with three bone regenerative techniques. Ninety-two patients in need of a single implant crown to replace a molar were included. After placing the implant, patients were randomized to one of three treatment groups for bone reconstruction of remaining peri-implant defects: Autologous bone (AB) chips, ossix membrane (OM), or a combination of AB chips and OM. The implant was submerged, and after 4 months of healing a re-entry surgery was made to connect a healing abutment. Implants with a dehiscence on ≥ 2 sites (mesial/distal/oral/buccal), together with ≥ 50% visible threads, were judged as failures. A series of simple logistic regression analyses was performed to identify risk factors for failure among the following independent variables: Sex, jaw, smoking status, plaque, bleeding on probing, fistula, extraction reason, mean initial peri-implant defect size, treatment group, implant length, buccal bone dehiscence (BBD), soft-tissue dehiscence, and infection. Fifteen implants failed before abutment operation (13 explantations and 2 non-osseo-integrated). Treatment group had no impact on failure. Risk factors for failure were smoking >10 cigarettes per day, BBD, and infection. There was no difference in failure rate between three bone reconstructive techniques.</p><p>In our series SVR and SCR were 91.7% and 97%, respectively. Statistical analysis demonstrated that no studied variable had an impact on survival (i.e., lost implants) as well as on clinical success (i.e., crestal bone resorption).</p></sec><sec sec-type="conclusion" id="sec1-5"><title>CONCLUSION</title><p>OPIs are reliable devices for oral rehabilitation in molar areas.</p></sec></body><back><ack><title>ACKNOWLEDGEMENTS</title><p>This work was supported by the University of Ferrara (F.C.), Ferrara, Italy and by PRIN 2008 (20089MANHH_004).</p></ack><fn-group><fn fn-type="supported-by"><p><bold>Source of Support:</bold> This work was supported by the University of Ferrara (F.C.), Ferrara, Italy and by PRIN 2008 (20089MANHH_004)</p></fn><fn fn-type="conflict"><p><bold>Conflict of Interest:</bold> None declared</p></fn></fn-group><ref-list><title>REFERENCES</title><ref id="ref1"><label>1</label><element-citation publication-type="journal"><person-group 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