AIM: To measure marginal bone loss around endosseous dental implants at 2nd stage abutment surgery and retrospectively evaluate the association of pre-surgical variables with bone findings. MATERIALS AND METHODS: Two implant systems were included in the study design. Straumann Bone Level Tapered SLActive and Nobel Biocare Replace Conical Connection. Implants were placed by the same resident from the Periodontics department. Clinical measurements of bone level were recorded at the time of placement and then again at 2nd stage surgery at four different points (mesial, lingual, buccal, distal). RESULTS: Five implants were evaluated in the study. Bone loss averages ranged from 0-1.0mm. Nobel implants had an average loss of .75mm and Straumann implants had an average loss of .67mm. CONCLUSION: Many variables contribute to marginal bone loss around endosseous dental implants at 2nd stage abutment surgery. The current research was designed to understand the relationship between these variables and early marginal bone loss. All implant samples included here were defined as control because of ≤1.0mm bone loss per IRB protocol.

Abstract  Objective:The aim of this retrospective study was to examine the influence of a cantilever on marginal bone loss (MBL) around dental implants supporting 3-unit partial fixed prostheses.  Materials and methods:Retrospective data were collected from dental records of patients at a specialist clinic in Malmö, Sweden, covering the period from 1980 to 2018. Only implants not lost and with baseline radiographs taken within 12 months after implant placement and with a minimum of 36 months of radiological follow-up were considered for the analysis of MBL. Univariate linear regression models and a final linear mixed-effects model were used to analyze the results.  Results:139 patients (64 men and 75 women) were included in our study, with 161 implant- supported FDPs undergoing radiological follow-up over at least 36 months. These patients had 428 implants (95 and 333 implants supporting prostheses with and without cantilever, respectively). Total number of double measurements for marginal bone level was 2,909, including 2,238 without cantilever and 671 with cantilever. There was a significant relationship between MBL over time the presence of cantilever, patient’s sex, implant surface, bone quality of the implant site, and bruxism.  Conclusion: MBL around dental implants supporting 3-unit partial fixed prostheses over time was significantly influenced by cantilever.  Keywords: Implant-supported fixed partial prosthesis, cantilever, marginal bone loss / Sammanfattning  Syfte: Syftet med den föreliggande retrospektiva studien var att undersöka inverkan av en kantilverburen protetisk arm på marginal benförlust runt tandimplantat som stödjer korta partiella fasta proteser. Material och metod:Det fanns 139 patienter med i vår studiegrupp (64 män och 75 kvinnor) med 161 implantatstödda FDPs som hade en röntgenologisk uppföljning under minst 36 månader. Den beskrivande datan om fallen baserades på data som samlats in från patienternas journaler gällande ålder och andra faktorer som analyserades. Studien baseras på data som samlats in från patienternas journaler mellan 1980 och 2018 på en specialistklinik i Malmö, Sverige där röntgenbilder har analyserats för att mäta benförlust runt implantat. Statistiska analyser har utförts för att utvärdera resultaten i förhållande till kantilever samt olika patientfaktorer. Resultat:Den totala mängden dubbelmättningar för marginala bennivån var 2909 st, där 2238 st var utan kantilever och 671 var med kantilever. Genom vårt resultat kunde man se ett signifikant samband mellan förlust av marginalt ben (MBL) och flera faktorer, såsom kantileverburen arm, kön, implantatyta, benkvalitet och bruxism. Slutsats: MBL runt 3-unit implantat-

Aim: The overall aim is to (i) analyze the prognosis of dental implant treatment concerning marginal bone loss (MBL) in patients undergoing or have undergone treatment with bone antiresorptive or antiangiogenic medication for osteoporosis (ii) and additional purpose to assess the available scientific literature in the first aim concerning the risk of getting medication-related osteonecrosis of the jaw (MRONJ) associated with dental implant installation.  Material and methods: A systematic literature search was conducted in October 2021 in the following three databases; MEDLINE/PubMed, Cochrane Library and Web of Science. PRISMA 2009 Flow Diagram were used for the selection process, whereas the included studies were evaluated for quality assessment using Newcastle Ottawa Scale (NOS).  Results: The search resulted in four included studies considering the eligibility criteria. The studies evaluated MBL in osteoporotic patients undergoing or have undergone oral bisphosphonate (BP) treatment before and/or during implant placement. MRONJ was also assessed in all four articles.  Conclusions: The results of this present study do not indicate that patients undergoing or have undergone antiresorptive or antiangiogenic medication for osteoporosis are at an increased risk of MBL in dental implants during follow-up periods. The present data assessing the risk for developing MRONJ remains low for osteoporotic patients. Therefore, dental implant surgery is considered possible with success in osteoporotic patients receiving earlier mentioned medications. However additional studies are required to evaluate the effects on this patient group concerning osseointegration of dental implant regarding MBL. / Syfte: Syftet med denna studie är att analysera prognosen för implantatbehandling avseende marginell benförlust (MBL) hos patienter som genomgår eller har genomgått behandling med benantiresorptiv eller antiangiogen medicin för osteoporos. Ytterligare utförs en bedömning av tillgänglig vetenskaplig litteratur gällande risken för läkemedelsrelaterad käkbensnekros (MRONJ) associerat med implantatinstallation hos patienter som genomgår eller har genomgått behandling med benantiresorptiv eller antiangiogen medicin. Material och metod: En systematisk elektronisk litteratursökning genomfördes i oktober 2021 i följande tre databaser; MEDLINE/PubMed, Cochrane Library och Web of Science. PRISMA 2009 Flow Diagram användes för urvalsprocessen, varav de inkluderande studierna kvalitetsgranskades enligt Newcastle Ottawa Scale (NOS). Resultat: Sökningen resulterade i fyra studier, enligt inklusions- och exklusionskriterier. Studierna utvärderade MBL hos osteoporospatienter som går eller har gått behandling med orala bisfosfonater före eller under implantatinstallationen. MRONJ fastställdes i alla fyra artiklar. Slutsats: Resultatet av denna studie indikerar inte att patienter som genomgår eller har genomgått behandling med benantiresorptiv eller antiangiogen medicin för osteoporos löper en ökad risk för MBL av dentala implantat under uppföljningsperioder. Nuvarande data bedömer att risken för att utveckla MRONJ är fortfarande låg för osteoporos patienter. Därför antas implantatkirurgi kunna utföras på osteoporos patienter som står på denna medicinering. Dock krävs ytterligare studier för att utvärdera effekterna av denna patientgrupp gällande osseointegration av dentala implantat avseende MBL.