Download or read book Survival and Complication Rates of Short Implants supported Single Crowns in the Posterior Regions with High Crown implant Ration C I A 10 year Retrospective Study written by and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Objectives: Short implants are an alternative in atrophic posterior jaws. The aim of this retrospective cohort study is to evaluate the survival rate, complications and patient satisfaction of short implants (u22648mm) and to investigate whether the crown-implant ratio (C/I) has impact on the long term clinical outcomes of short implants.Methods and Materials: Ninety-eight short implants were placed and restored in 65 patients. C/I were measured. For implants with C/I u2265 1, clinical examination were conducted. Implant survival, complications and patient satisfaction was recorded. Results: For 92 implants, the C/I were u2265 1.With a mean follow-up of ten years, survival rate of the 92 implants was 93.5%. The most frequent complications were peri-implantitis and soft tissue complications.Conclusions and clinical significance: Placing short implants in the posterior regions has a predictable outcome in patients with reduced bone height.

Download or read book Outcomes of Short Implants Supporting Fixed Prostheses in Posterior Region a Retrospective Study of 1 3 Years written by Young-Jun Lim and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Background : Short implants are considered to be the simpler and more effective alternative to complicated bone graft surgery in clinical situations with reduced alveolar bone height. But, a considerable number of clinicians still hesitate to use short implants questioning about their prognoses mainly due to the reduced contact area between the bone and implant and unfavorable crown to implant ratio compared to longer implants. Aim : The aim of the study is to evaluate the clinical and radiographic outcomes of short implants supporting fixed prostheses in posterior regions. Methods : A retrospective study design was adopted. 69 short implants(intra-bony length u2264 8 mm) supporting fixed prostheses in posterior regions of 56 patients were included. The implant success rate and periimplant marginal bone loss were evaluated. The effects of associated factors on the implant performance were analyzed. Results : A total of 3 implants failed. 2 implants were lost before loading and 1 implant was lost at 7 months after loading. The mean follow up was 30.1 months(SD=11.8 months). Success rate was 95.7% and 94.6% for the implant and patient-based analysis respectively. The average marginal bone loss after 1 year of follow-up was 0.02 u00b1 0.16 mm at mesial and 0.03 u00b1 0.14 mm at distal aspect. No relationship was observed between the studied variables and the marginal bone loss. Conclusions: High survival rates for short implants in posterior regions could be achieved with minimal marginal bone loss in this study. Within the limits of the short term follow up, a short implant (u2264 8 mm ) may be considered as a predictable treatment modality for posterior region with reduced bone height.

Download or read book A 10 Year Retrospective Study on Cemented Versus Screw Retained Implant Abutment Connection written by and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A large number of studies described implant survive and their short and long-term success with 94.6% early success rates and 89.7% even after more than 10 years of function. The failure of implant supported rehabilitation was either mechanical or biological. Few studies have conducted follow-ups for more than 10 years with regard to specific fixture-abutment connection. The aim of this retrospective study is to evaluate the long-term reliability and the incidence of technical and biological complications on single crowns supported by: cement retained abutment (CRA) and screwed retained abutment (SRA). A total of 300 single implant supported crowns performed from 2004 to 2007 on 300 different patients aged between 40 and 75 years were analyzed. Patients were divided in 150 group A (SRA) and 150 group B (CRA) selecting by inclusion criteria.The research was so performed: periapical radiographs performed with bite block, where crestal bone resorption (RC) was measured. The values were classified in three categories: 2 mm, between 2 and 4 mm, and greater than 4 mm. Bleeding on probing (BOP) and probing depth (PD) were measured. A cut-off of 5mm was taken related to PD: 5 mm was considered a negative outcome. Prosthetic complications were recorded: abutment decementation, screw loosening and prosthetic fracture. The results were analyzed for statistical analysis. The data analysis showed a rate of 4% of implant failure during the 10 years follow up period. Therefore this data were not taken into consideration for complication analysis. Regarding biological aspect, results showed a positive BOP index at 84.2% of the sites under investigation. Specifically, SRA showed a BOP of 86,5% and CRA 81,4%. More over the probing depth (PD) >5mm on peri-implant soft tissues analysis demonstrated a rate of 20,9% for CRA and 13,8% for SRA. The crestal bone loss radiographic measurements demonstrated for the range of RC 2 mm, a value of 16% for SRA and 62% for CRA; RC 24 mm 70% for SRA and 31% for CRA and at the end RC 4mm revealed a 14% for SRA whilst 7 % for CRA. Regarding mechanical aspect of connection a total of 14,6% of complications occurred: 6,2% for SRA and 8,33% for CRA. Finally, about prosthetic aspects: 7,6% crown fracture for SRA and 2,78 %for CRA. The results from this 10-year retrospective study showed that the two methods have positive long-term follow-ups, although the complications encountered. RC was statistically greater in the SRA group. In this regard, the possibility of having a better coupling between parts in the CRA method encourages the clinical use of these in terms of lower bone resorption values and screw loosening.

Download or read book A 5 year Retrospective Human Study on Cemented Implant Abutment Connections of Single Crown Implant Rehabilitations written by Gianmaria D'Addazio and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Dental implants represent an efficient option for the replacement of missing teeth. A large number of studies, stated a high implant success rate of more than 10 years. However, failures and complications have been described. Marginal Bone Loss (MBL) occur in the peri-implant area and it is considered an important factor for implant survival. The latter is influenced by several factors such as micro-movement, bacterial infiltration, bone type, macro-geometry and implant abutment connection. Although, different types of implant abutment connections has been developed, there is still lack of knowledge concerning cemented retained fixture-abutment connection. therefore, the aim of this retrospective study was to evaluate at 5 year of follow-up the survival rate and MBL on cemented retained abutments of single crown implant rehabilitations. A total of 52 single implant supported rehabilitation, performed on patients aged between 31 and 78 years were analysed on this human study. Patients were rehabilitated with single crown with cemented retained abutments. This type of abutment connection provides a collar positioned inside the fixture with a press-to-fit system. A titanium full milled abutment was cemented on the collar and then a single prosthetic crowns were cemented on the correspondent implant abutments. After 5 year of follow-up, survival rate and MBL (performed by periapical radiographs with individualized bite block) were analysed. Data are presented as means and standard deviations (SD) and used for the statistical analysis. A Tukey Test was used for the multiple comparisons.The data analysis showed a rate of 100% of implant survival rate after the 5 year follow up period. The marginal bone loss radiographic measurements were described in table. MBL showed a mean reduction of 0,62mm u00b1 0,12 after 5 year of function compared to the insertion time point. Regarding mechanical aspect of connection no complications occurred.No crown or abutment loosening were registered. Correlations of MBL with age and sex were performed and no difference was shown comparing MBL and Sex. On the other hand, a statistically significant difference was found relating age and MBL (P

Download or read book Ten year Results of Tapered Implants Supporting Single tooth Or Fixed Partial Dentures written by Stefano Corbella and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: BackgroundDespite dental implants being widely used in clinical practice, there is a relative lack of information about medium- and long-term outcomes of implant-supported rehabilitations, particularly with respect to tapered implants and trends in bone resorption rates.AimThe aim of this extension study, recalling patients from a prospective single-center investigation, was to evaluate the ten-year clinical outcomes of single-tooth and partial rehabilitations supported by tapered implants.Materials and methodsIn this single-center study, the patient inclusion criteria were classification as healthy or having mild systemic disease (ASA-1 or ASA-2), one or more teeth missing, adequate oral hygiene level, healthy periodontium, and smoking less than ten cigarettes a day. All patients fulfilling the criteria were treated between June 2005 and March 2006 with tapered implants (Replace Select Tapered, Nobel Biocare), using either a one- or two-stage protocol. Bone quality (Lekholm and Zarb) was assessed at implant insertion on implant level. Patients were recalled every six months for the first 3 years and then annually. Mean marginal bone resorption (MBR; mean of mesial/distal measures from paired periapical radiograph, being the time of prosthetic placement the baseline), and occurrence of complications were recorded. Cumulative success and survival rates on implant level were determined by life table analysis. Unpaired student t-test was used to assess the significance of differences in MBRs.ResultsA total of 19 patients (6 male, 13 female; mean age 64.60u00b18.59 years) received 53 tapered implants supporting 30 prosthetic rehabilitations comprising 13 single crown restorations and 17 fixed partial dentures (FPDs). Prosthetic rehabilitation was done at 4.2u00b10.6 months (range 3.0-4.8 months) after surgery, and all patients were followed for 10 years from loading. Three implants failed due to peri-implantitis (one each after 2, 6 and 8 years from loading) and were removed, giving a cumulative survival rate of 95.4% and a cumulative success rate of 88.9% at 10 years after prosthetic loading. The mean MBRs were 0.44u00b10.19 mm, 0.71u00b10.35 mm, and 1.05u00b11.06 mm after 1, 5 and 10 years of loading, respectively. The mean MBR was statistically higher (P=0.02) for implants placed in type 3 bone (n=26) than for those placed in type 2 bone (n=27). Furthermore, the mean MBR for implants supporting FPDs was statistically higher than for single crowns (P=0.03).Conclusions and clinical indicationsTapered dental implants were characterized by a high cumulative survival and success rate, up to 10 years after loading. Low MBR was observed, particularly at implant sites in type 2 bone or supporting single crowns. Within the limitations of this study, this supports the clinical use of tapered implants for long-term single crown and FPD restorations.

Download or read book The Clinical Performance of All ceramic Implant supported Single Crowns written by Kerstin Rabel and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Objective This review aimed at evaluating the survival and technical complication rates of all-ceramic implant-supported single crowns (SC). Material and Methods Three electronic databases were searched for clinical studies conducted at ≥ 15 patients examining implant-supported all-ceramic SCs over ≥ 12 months. Survival rates of implants and restorations plus technical complication rates of SCs were calculated and tested for statistical correlation with confounding variables. Statistical analysis was performed using a negative binomial distribution model to calculate 5- and 10-year survival and complication estimates. Results Forty-one included studies reported on implant-supported SCs made of veneered and monolithic high-strength oxide ceramics, monolithic, and veneered glass-based ceramics and of a monolithic resin-nano-ceramic (RNC). Survival estimates for SCs of 93% (95% CI: 86.6%-96.4%) after 5 years and 94.4% (95% CI: 91.1%-96.5%) after 10 years were calculated, corresponding values for implant survival were 95.3% (95% CI: 90.6%-97.7%) and 96.2% (95% CI: 95.1%-97.1%). Technical complication rates after 5/10 years were as follows: chipping 9.0% (95% CI: 5.4%-14.8%)/2.7% (95% CI: 2.1%-3.5%), framework fractures 1.9% (95% CI: 0.7%-4.9%)/1.2% (95% CI: 1%-1.5%), screw loosening 3.6% (95% CI: 1.6%-8.4%)/5.2% (95% CI: 3.6%-7.5%), and decementations with 1.1% (95% CI: 0.4%-2.8%) after 5 years. Some confounding variables influenced the above-mentioned estimates significantly. Conclusions All-ceramic implant-supported SCs showed--with the exception of a RNC material--high survival rates. However, failures and technical complications occurred which have to be considered when informing patients on the treatment with implant-supported all-ceramic SCs

Download or read book Clinical Performance of Short Implants Placed in the Molar premolar Region a 2 year Retrospective Study written by Yoshihito Naito and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: BackgroundRecently, the use of short implants in anatomically restricted regions has been attracting the attention of many clinicians around the world, as it represents an excellent minimally-invasive treatment option. Nevertheless, when selecting short implants the prevalence of peri-implant bone resorption still remains to be elucidated. The DENTSPLY ASTRATECH IMPLANT EV SYSTEM used in this study is a system in which the operator is able to select the drilling protocol according to the bone quality.AimWe aim to analyze the clinical benefits of short implants (6mm) and at the same time we believe that the key to minimizing bone resorption is to obtain an appropriate initial stability taking into account the placement torque and at the same time by optimizing the bone quality and drilling protocol.Materials and Methods Twenty-six 6 mm short implants (DENTSPLY SIRONA Astra Tech Implant System EV) were placed in 16 patients. Among the 16 patients, 7 were treated with 6 mm implants in multiple sites. Bone quality, drilling protocol together with the placement torque were recorded. Then, changes in the degree of bone resorption, and the state of the peri-implant mucosal sulcus were measured from the time of delivery of superstructures to 2 years after setting. Of the twenty-six implants, ten were inserted in the maxilla and sixteen were inserted in the mandible. The diameter of nineteen implants was 4.2 mm and that of seven implants was 4.8 mm, all of straight type.ResultsBone quality of all the alveolar processes was type I for 3, type II for 8, and type III for 15. The mean placement torque was 34.2 Ncm. (Standard deviation [SD]: 8.16, range [r] 20 to 45 Ncm). The retention type of the superstructures was cement-retained for six implants (1 single crown, 5 splinted crowns), and screw-retained for twenty implants(6 single crowns and 14 splinted crowns). During the 2 years of follow-up after setting the superstructures, all implants were stable. The mean mesial Bone Level (BL) at the superstructure setting time was -0.05 mm. (SD: 0.62, r: −1.33 to 1.73 mm), the mean distal BL was 0.37 mm (SD: 0.74, r: -0.63to 2.26 mm). The mean mesial BL after 2-years was 0.33 mm (SD: 0.65, r: -0.96 to 1.52 mm), the mean the distal BL was 0.53 mm (SD: 0.63, r:-0.5 to 2.23 mm). The mean BL differences between the setting time and after 2-years were 0.38 mm on the mesial side (SD: 0.49, r: -0.25 to 1.88 mm) and 0.15 mm in the distal side (SD: 0.42, r: -0.98 to 84 mm)ConclusionsIn this retrospective study, we examined the clinical peri-implant tissue stability after placing 6 mm implants. Measurement of peri-implant bone levels showed that in most cases the bone-implant junction moved coronally. This phenomenon appeared to have resulted from continuous bone remodeling. There were no significant differences in bone levels variations depending on region,u3000superstructure extension or retention-type. This suggests that short implants are beneficial in clinical practice.

Download or read book Survival of Single Implant supported Restorations Placed Distal to Residual Dentitions and Followed Up for at Least One Year written by Shaya Sadeghi and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this retrospective study utilising a chart review was to determine the survival of single implant-supported restorations in distal end partially edentulous arches and identify factors associated with biological and mechanical complications of those restorations. A total of 132 participants (M = 66.8 years) from the University of Toronto Faculty of Dentistry clinics were included. Follow-up ranged from 7 to 119 months (M = 58.2 month). Out of 149 implants, seven (4.7%) failed during the follow-up period. No predictors of biological complications were statistically significant. However, light occlusion was associated with significantly fewer mechanical complications compared to evenly distributed occlusion. In this study, light occlusion associated with fewer chipped restorations, fewer loosened screws/crowns, and fewer fractured crowns. These findings suggest that implant-supported single restorations have high survival rates over a mean follow-up for five years.

Download or read book A 15 year Study of Short Dental Implants After Prosthetic Rehabilitation written by Saridakis Konstantinos and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A 15-year study of short dental implants after prosthetic rehabilitationSaridakis K, Vou00df D, Wagner W Background: The use of short dental implants can extend the indication range of dental implantology, by reducing the use of bone augmentation procedures in atrophied jaws; In addition their use can reduce treatment costs, decrease treatment time and improve complications rate. Despite the fact that implants of various lengths have been introduced in the market since the establishment of implantology, It still remains controversial below which length an implant should be considered as a short.Aim: The aim of this retrospective study was to evaluate the long-term survival rate of short implants and to compare the survival rates of two different short implants groups in association to the impact of crown/implant ratio, implant design and augmentation procedures.Materials and methods: A total of 247 patients were treated with 465 short dental implants (u22649mm) between 01.2000 and 01.2015 in a Clinic of Oral&Maxillofacial Surgery; after exclusion of drop-outs and application of inclusion criteria, the implants were divided into two groups based on their length in order to analyze survival rates and marginal bone levels. The first group (4.50mm - 7.00mm) included 32 patients with 54 short dental implants while the second group (>7.00mm - u22649.00mm) included 29 patients with 73 short dental implants. Results: Sixteen implants failed during the follow-up period. Cumulative survival rate according to Kaplan-Meier for the whole sample was 87.4%. There was no statistically significant difference in survival rates between the two groups (87.03% vs 87.67%). The interproximal marginal bone loss for the first group was u03bc=0.38mm (Range: 0.02 to 2.23mm) at the mesial aspect and u03bc=0.39mm (Range: 0.01 to 2.56mm) at the distal aspect in relation to implant shoulder level and showed no significant difference to the second group (u03bc=0.57mm mesial with range: 0.02 to 4.00mm and u03bc=0.56mm distal with range: 0.03 to 4.22mm). There was no statistically significant difference between groups (p>0.05) in the influence of the crown / implant ratios on the survival rate. Also, in the first group conical implants presented a higher survival rate (p

Download or read book Survival and Marginal Bone Loss of Short Implants a Case Series written by and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: BackgroundImplant-supported rehabilitation of the edentulous posterior jaws can be a challenging situation due to a relevant atrophy of the residual bone. An alternative approach to bone regenerative procedures is the use of short implants (intrabony implant length greater than or equal to 6 mm). It represents a less-invasive treatment with growing evidence of acceptable long-term survival rates.AimTo evaluate the survival and the marginal bone loss of 5 mm and 6 mm short implants supporting conventionally and immediately non functionally loaded fixed rehabilitations. Data are presented at 1 and 2-year follow-up from the prosthetic loading.Materials and Methods36 patients were consecutively included. Inclusion criteria were the absence of one or more maxillary or mandibular molar and premolar associated to alveolar bone atrophy (height between 6 mm and 8 mm, width at least 8 mm). Fifty-six 5mm and 6mm short implants were positioned (of these, 17 implants immediately non functionally loaded in 13 patients). Implants were positioned subcrestally and were treated with 4.1 mm immediate platform switching applied to the cover screw if submerged, healing screw or prosthetic abutment when not submerged or immediately loaded. Implant survival and marginal bone loss (MBL) were measured at 1 and 2-year follow-up from the prosthetic loading. Anatomical crown to implant (C/I) ratio was measured as well. The correlations between MBL and the use of low profile abutments, C/I ratio and single/multiple units restorations were assessed using mixed statistical models.ResultatsThe analysis included 11 males and 25 females (median age 62 years, IQR 54-68). Loading was immediate in 17 implants (30%). Low profile abutment was used in 18 implants (32%). Mean C/I ratio was 2.5 (SD 0.6). Implant-based survival was 96% at 1 year (immediate loading 94%; conventional loading 97%) and 88% at 2 years (immediate loading 94%; conventional loading 85%). 4 of these implant failures occurred in 1 patient between the first and the second year after conventional loading. Mean MBL was 0.17 mm (SD 0.30) at 1 year and 0.22 (SD (0.33) at 2 years. MBL at 1 year was not associated with immediate loading (mean difference 0.06 mm, 95%CI -0.25 to 0.13; p=0.54) vs traditional loading. MBL at 2 year was not associated with immediate loading (mean difference 0.06 mm, 95%CI -0.28 to 0.16; p=0.61) vs traditional loading. Low profile was not associated with MBL at 1 year (p=0.42) or at 2 years (p=0.72). C/I ratio was not associated with MBL at 1 year (p=0.42) or at 2 years (p=0.69).Conclusions and Clinical ImplicationsWithin the limitations of this case series, short implants showed acceptable survival rate and MBL. Comparable results were observed between immediate and conventional loading. Further evaluations with a longer follow up are required.

Download or read book Screwed retained Vs Cemented Implant Fixed Partial Dentures Ten Years Follow up Retrospective Study written by Francetti Luca Angelo and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Peri-implantitis has to be considered the main biological cause of implant failure, leading to progressive bone resorption around dental implants, and, in the end, to mobility or to the need for implant removal. Screwed and cemented implant-supported prostheses have both advantages and disadvantages, such as retrievability, presence of the screw access hole, chipping of ceramic veneer, passivity, esthetics and the need of careful removal of excess cement.The aim of the present study was to present medium- and long-term data on implant survival rates and prevalence of peri-implantitis in a cohort of patients treated with single crowns and fixed partial dentures comparing screwed- and cemented-retained restorations.Clinical records of all patients treated with single crowns and fixed partial dentures in the Dental Clinic of the IRCCS Istituto Ortopedico Galeazzi in Milan, Italy, supported by moderately rough implants were retrospectively examined to calculate survival curves for implant loss and for the occurrence of peri-implantitis. Implant survival was defined as implant in situ, stable, supporting a functional prosthesis whereas an implant was considered failed when it was extracted by one operator due to loss of osseointegration or when it was spontaneously lost. The criteria to define the presence of peri-implantitis were the evidence of bleeding/suppuration (signs of inflammatory reaction) and a concomitant bone resorption process of 2 mm or more, evaluated comparing the baseline and follow-up radiographs. Regression methods were used to evaluate the correlation between the type of restoration (cemented- versus screwed-retained) and the outcomes.A total of 308 implants were evaluated for a mean period of 10.0 years from loading. After 5 years, the cumulative survival rate (CSR%) was 97.06% (133 implants) whereas after 10 years the CSR% was 89.14% (47 implants); no significant difference between screwed- (CSR% 87.29%) and cemented-retained (CSR% 94.67%) was found using the Kaplanu2013Meier estimator. The cumulative rate of implants free from peri-implantitis after 10 years was 71.80%; no significant difference between screwed- (CSR% 71.92%) and cemented-retained (CSR% 72.07%) was found.The study reported high 10-year implant survival rate for fixed partial dentures since implant loss was relatively rare. Peri-implantitis was relatively frequent in the examined population although the number of subjects available for 10-year evaluation was limited. No correlation was found between the type of restoration (cemented- versus screwed-retained) and the outcomes.

Download or read book Retrospective Study of 8 mm Bone Level SLA surfaced Implants with 1 to 2 year Follow up written by Duarte Nuno Silva and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Background: Short implants have been described as a treatment option to avoid complementary surgical procedures in cases of limited bone height. In order to increase the biomechanical properties of short implants, implant manufacturers have developed different implant surfaces and macroscopic topographies. More recently, bone level short dental implants with SLA surfaces have been launched into the market, but still there is a lack of information regarding medium-long-term survival rates.Aim: Retrospective study to evaluate the medium-term survival rates of 8-mm length bone level SLA-surfaced implants with at least 1-year follow-up.Methods and Materials: This single center retrospective study was based on the clinical records of patients who underwent dental implant therapy with Straumann Bone Level Tapered 8mm (BLT8) implants between January 2017 and April 2018 and complied with the mandatory follow-up visits. All patients were treated by a skilled surgeon with BLT8 implants using a standardized protocol. Data regarding maxillary location, regeneration procedure, date of surgery, date and time of loading, final follow- up appointment as well as patient rehabilitation (single unit, partial, total) were obtained following ethics committee approval.Early failure was defined as an implant that failed to integrate and was removed before 6 or 3 months for implants placed with and without regenerative procedures, respectively. Late failure was defined as implant removal with prosthetic loading following the osteointegration period.Results: A total of 214 BLT8 implants were inserted in 99 patients. 115 (53.7%) implants had a regular diameter of 4.1mm and 99 (46.3%) a narrow diameter of 3.3mm. The posterior mandible (36.0%) and the posterior maxilla (29.9%) were the most frequent locations, as opposed to the anterior mandible, which presented the lowest percentage of short implants placed (13.1%).Immediate loading was performed in 75 (35.0%) implants and mostly used as posterior implants in full arch rehabilitations. 212 implants received prosthetic load, of which 86.0% were over splinted implants and 14.0% over single unit implants.214 implants were evaluated for early failure and 212 for late failure. Of those, one implant failed in each evaluated period, which resulted in a survival rate of 99.5% for early and late failure with no statistical differences between them (p>0.05). Conclusions and Clinical Implications: Within the limitations of this study the Bone Level SLA-surfaced 8 mm length implants showed high survival rates within the evaluated follow up period, comparable to those described in the literature for the standard-length implants. Further follow-up studies with larger samples and longer follow-ups are required to identify factors that could interfere in the survival and success rates of short dental implants.

Download or read book Comparative Study of Immediate Loading on Short Dental Implants and Conventional Dental Implants in the Posterior Mandible A Randomized Clinical Trial Four Months Post loading written by Khongkhunthian Pathawee and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Immediate dental implant placement and loading treatment protocol has been investigated with the promising clinical results. However, the use of short implant in this treatment option has not been performed. The purpose of the study was to compare the clinical outcomes and survival rates of immediately-loaded short implants and conventional length dental implants (Pw Plus dental implant system, Thailand) in replacing mandibular molar teeth.Materials and methodsThe clinical study was approved by the Human Experimentation Committee. Fifty implants in 46 patients were included in the study. Twenty five short dental implants (6 mm.) and 25 conventional dental implants (10 mm.) were randomly placed as single tooth replacements in the edentulous molar areas of the mandibles. Provisional, CAD-CAM, ceramic block (Shofu HC) crowns were cemented to the abutments of the implants, and immediately loaded. The clinical parameters, such as insertion torque (IT), resonance frequency analysis (RFA), marginal bone level changes, and complications, were recorded and statistically analysed.ResultsTwo short implants and two conventional implants were excluded from the study due to insufficient insertion torque (less than 35 Ncm). Two short implants disintegrated, and one conventional implant failed. The accumulate survival rate of short implants was 91.30%, compared to 95.65% for conventional implants. However, there was no significant difference between the two implant types (P (Fisheru2019s exact) = 1.00). Only minor complications were found (three provisional crown fractures with short implants and two with conventional implants).The differences in IT among the two implant types were not significant (P =.264). There was no significant difference in ISQ value for short or conventional implants between baseline (short: 73.86 u00b1 2.38 mm, conventional: 75.05 u00b1 3.26mm, P=.088) and four months after loading (short: 72.37 u00b1 1.35 mm, conventional: 72.89 u00b1 1.87 mm, P=.165). The mean change in marginal bone level four months post-loading was 0.24 u00b1 0.29 mm for short implants and 0.26 u00b1 0.29 mm for conventional implants ; there was no statistical difference between the two implant types.ConclusionsWithin the limitations of this study, the findings seem to confirm that the immediate loading of short implants is a viable option, comparable to conventional length implants in terms of implant survival, marginal bone loss and ISQ value.

Download or read book Short Implants 6mm Versus Longer Implants 11mm in Combination With Sinus Elevation Procedure in the Atrophic Maxilla Retrospective Analysis of a 5 Year Follow Up of a Randomized Clinical Trial written by Pierluigi Balice and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: AIM: To compare, clinically and radiographically, short dental implants (6 mm) to long implants (11-15 mm) placed with sinus grafting. METHODS: Participants with 5-7 mm of bone height in the posterior maxilla were randomly allocated to receive short implants (GS) or long implants with sinus grafting (GG). Implants were loaded with single crowns 6 months after placement (PR). Patients were re-evaluated up tp 60 months after loading (FU-5 years). Outcome variables included: marginal bone level alteration (MBL), implant success and survival rate, periodontal probing depth (PPD), bleeding on probing (BoP), plaque control record (PCR) and crown-to-implant ratios (C/I). Statistical analysis was performed using non-parametric tests. RESULTS: 13 patients, 15 implants were re-evaluated at FU-5 years. Intergroup comparison reported no statistical differences in marginal bone loss from baseline to 5 years (GS,-0.33 ± 0.29/GG, +0.32 ± 0.9, p=0.233). No statistical differences were found for PD, BoP and PCR. CONCLUSION: Both treatment modality provided similar outcomes.

Download or read book Bone Level Tapered Implants Used for Immediate Versus Early Implant Placement and Restored with All ceramic Crowns on Titanium Base Abutments Preliminary 1 year Results of an Ongoing Randomized Controlled Clinical Trial Implant Survival and Bone Level Changes written by Irena SAILER and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract:Background: The aim of this study was to assess the clinical and radiographic outcome of a new, bone level tapered dental implant with a hydrophilic surface when inserted either following an immediate or early placement protocol. Furthermore, the behavior of the implant stability quotient (ISQ) at different time-points and the aesthetic outcome was analyzed.Material and methods: Patients in need of tooth extraction and replacement by a single implant in the anterior to premolar areas of their maxillae or mandibles were recruited. The patients were randomly assigned to either the immediate or the early placement group. 4-6 weeks after implant placement, the impression was performed. 8-10 weeks after surgery, the implants were loaded with the final crown. The clinical and radiological outcomes were assessed. Furthermore, the behavior of the implant stability quotient at different time-points and the aesthetic outcome was analyzed.Results: All 20 implants could be loaded according to the protocol within 8-10 weeks after implant placement. At the 12 months follow-up visit, all 20 implants were osseo-integrated and the survival rate was therefore 100%. The ISQ values of all 20 implants showed a trend towards a gradual increase from 69.6 (buccal) and 72.7 (mesial) directly after implant placement to 73.55 (buccal) and 76.2 (mesial) at impression taking and 75.95 (buccal) and 78.4 (mesial) at loading. During the follow-up visits, the mean distance from implant shoulder to the first bone-to-implant contact was 0.32 mm after 6 months and 0.35 mm after 12 months, respectively. At the 12-months examination, the mean bone loss in the immediate group was 0.55 mm and 0.18 mm in the early placement group.Conclusions: The short-term, preliminary data of this clinical study demonstrate high survival rates and excellent clinical outcomes. Bone level tapered implants placed by means of both immediate and early implant placement protocols exhibit similar survival and success rates, changes in the crestal bone level and esthetic outcomes 12 months after loading.

Download or read book Survival Rate Evaluation of Short Implants a Retrospective Study written by Mario Groisman and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The present study aims to evaluate the survival rate of 101 short implants (u2264 8.5 mm), installed in maxillary and mandible regions. Implants with at least 1 year of follow-up were included in the study after the installation of the prostheses. The mean follow-up time was 48.0 u00b1 19.4 months, ranging from 12 to 108 months. The total survival rate of the implants was 97.02%.

Download or read book Correlation Between Implant Long Axis Position Relative to Crown and Incidence of Complications written by Marko Patrun and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Correlation between implant long axis position relative to crown and incidence of complicationsBACKGROUND: The goal of successful implant and prosthodontic therapy is to replace one or more missing teeth in the prosthodontically correct position allowing for optimal function, esthetics and durability. There are numerous discussions about whether the implant position relative to its crown can influence the occurrence of complications and the overall success of implant-prosthodontic therapy.AIM: The aim of this study was to investigate the influence of the implant long axis position relative to the crown center and occurrence of technical and biological complications, in implant-borne single crowns and FPDs. MATERIAL AND METHODS: A total of 141 subjects with cemented (GIC, FujiCem, GC Corp., Japan) implant-supported prosthodontic appliances (single crowns and FDPs) at premolar and molar regions were followed during a period of 1 to 5 years. All subjects had received AstraTech TX implants, Dentsply Sirona Implant Co.Orthopantomogram was made on the day of crown/FPD cementation and every year consecutively during regular check-ups. At check-ups, the following complications were registered: fracture of ceramics, construction or abutment, cement loosening, BOP and peri-implant bone loss. The OPGs were used to register the relation between implant long axis position relative to the center of the crown (central, mesial, distal positions). The presence of micro-gaps was registered when observed.RESULTS: A total of 141 subjects were examined (100 male and 41 female) between the age of 35 and 80 years. Positions of implant long axis relative to its crown were: 42 in the mesial, 68 in the center and 31 in the distal third of the crown. Micro-gap was present in 33 implant-borne crowns. Biological complications were: bone loss (u2153 of implant length - 12, u2154 of implant length - 12), implant loss - 14, BOP - 6. Technical complications were: abutment fracture - 8, ceramics fracture -10, abutment screw loosening - 7 and cement loosening - 4. Multivariate ANOVA demonstrated significant correlation (puff1c0,05) between implant long axis position relative to crown center and the occurrence of both technical and biological complications.CONCLUSION: Implant long axis position relative to the center of the crown seems to be correlated to the occurrence of biological and technical complications. The results of the study underline the importance of correct prosthodontically driven implant positioning. Further research is needed.