Custom Milled Zirconia Implant: A Case Series (original) (raw)
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Oral Surgery, 2009
This article describes a case report of an ongoing clinical investigation with modified root-analogue zirconia dental implants. We present a 40-year-old female patient with root caries and chronic apical periodontitis after an unsuccessful root canal treatment. The tooth was carefully extracted, and the socket was cleaned by means of curettage. The root was modified by application of macro-retentions and micro-retentions, and laser scanned, and an exact replica was milled from a zirconia block. Five days after extraction, a one-piece zirconia implant was placed into the extraction socket by gentle tapping with a hammer and a mallet. The soft tissue healed unremarkably around the implant within 3 days. The definitive restoration with a composite crown was performed 3 months after extraction. At 2-year follow-up, the patient presented with an excellent aesthetic and functional result.
Root analog zirconia implants: true anatomical design for molar replacement--a case report
The International journal of periodontics & restorative dentistry
Replacement of lost teeth using oral implants is an accepted treatment modality with well-documented high long-term success rates. Conventional screw- or threaded cylinder-type implants have been used almost exclusively. Their incongruence with the extraction socket necessitates the use of a barrier membrane or bone augmentation to prevent down-growth of connective tissue or epithelium between the implant and socket. Although some minor changes in implant design have been made, the neck and abutment connection areas have not changed much in the past 30 years. Custom-made root analog implants have been employed clinically in rare instances; however, they yielded failure rates of up to 96% at 1 year of follow-up. So far, ovoid implants are the closest in design regarding resemblance to the natural tooth anatomy. Root analog zirconia implants with macroretentions were developed and produced for immediate single-stage replacement of missing or hopeless teeth. This article discusses the ...
International journal of oral and maxillofacial surgery, 2011
This report demonstrates the clinical use of a modified, truly anatomic, root-analogue zirconia implant for immediate replacement of a two-rooted, left first mandibular molar. A 50-year-old female patient with chronic apical periodontitis of the left mandibulary first molar was referred and the tooth was extracted. The mesial root had to be removed surgically due to a root fracture. A truly anatomical, root identical, roughened zirconia implant modified by macro-retentions was manufactured and placed into the extraction socket by tapping 7 days later. After 4 months a composite crown was cemented in place. No complications occurred during the healing period. A good functional and aesthetic result was achieved with minimal bone resorption and soft tissue recession at 30 months follow-up. This report describes the successful clinical use of an immediate, single stage, truly anatomical root-analogue zirconia implant for replacement of a two-rooted tooth. Significant modifications such ...
Al-Azhar Dental Journal for Girls
Statement of problem. Treatment of tooth loss in the anterior maxilla can involve difficult functional, esthetic, and psychological problems, especially in young patients with otherwise good dentition. Purpose. The purpose of this study was to provide a comparative evaluation of two different implant system (Biohorizons and Dentium) with zirconia abutment in cemented single-tooth restorations. Material and methods. This prospective study of 45 single-tooth replacements with 22 Biohorizons and 23 Dentium dental implants was performed in 30 patients. The patients were selected from the outpatients' clinic, Faculty of Dental Medicine, Al-Azhar University during the period October 2010 to October 2013. The custom zirconia abutments were fabricated. The restoration was an all ceramic crown for cementation with a framework in zirconia. The first clinical and radiographic follow up was performed one week after crown placement for all patients (baseline examination) then at four, eight and twelve months after crown placement, all patients were recalled and participated in the annual examination. Results. The clinical parameters (plaque and peri-implant gingival indexes) measured at the baseline and 1-year follow-up examination showed non significant differences in Biohorizons and Dentium and gave a satisfactory results. There is a significant difference in probing depth where the Biohorizons gave better result. The bone loss in Biohorizons was lesser than that in Dentium. The mean marginal bone loss was slightly higher (non significant) in the maxilla for both implant systems. During the 1-year follow up period, the survival rate was 100% in Biohorizons implant system and 95.6% in Dentium implants. The titanium screws that attached the abutment to implant were loosened within a few months of insertion of the permanent crown in two cases of Dentium implant. Subjectively all patients were satisfied with their single-tooth restorations supported by both dental implants. Conclusion. Within the limitation of the present study, favorable results obtained with the application of the Biohorizons implant system that supported cemented single-tooth crowns with custom zirconia abutment especially in the anterior region of the maxilla. Further studies are necessary to evaluate the long-term success.
An Overview of Immediate Root Analogue Zirconia Implants
Journal of Oral Implantology, 2013
Owing to its excellent biomechanical characteristics, biocompatibility, and bright tooth-like color, zirconia has the potential to become a substitute for titanium as dental implant material and to be successfully used as root-analogue implants by reproducing the contours of the extracted tooth. This article presents an overview of the technique of using root analogue zirconia dental implants as an immediate implantation material. These implants are replicas of the extracted tooth and therefore truly anatomically correct and socket friendly.
Zirconia Dental Implants: A Literature Review
Journal of Oral Implantology, 2011
Titanium and titanium alloys are widely used for fabrication of dental implants. Because of potential immunologic and possible esthetic compromises with titanium implants, novel implant technologies are being developed. However, these novel technologies must maintain the characteristics that provide titanium implants with their high success rates. Zirconia implants were introduced into dental implantology as an alternative to titanium implants. Zirconia seems to be a suitable implant material because of its toothlike color, mechanical properties, biocompatibility, and low plaque affinity. The aim of this study is to review clinical and research articles conducted on zirconia dental implants, compare them with titanium dental implants, and provide information on zirconia dental implant osseointegration and mechanical strength. Zirconia dental implants have the potential to become alternative dental implants to titanium dental implants, but they are not yet in routine clinical use.
International Journal of Prosthodontics, 2022
To evaluate the biologic, technical, and radiographic outcomes of CAD/CAM-milled bilayer and monolithic zirconia crowns using implants and Ti-base abutments with up to 5 years of follow-up. Materials and Methods: A total of 182 implant-supported "screw-mentable" (hybrid screw/cement retention) single crowns were evaluated in 118 patients. Ti-base abutments were selected according to the chimney (3.5 or 5 mm) and gingival (1, 2, or 3 mm) heights in the virtual model. Zirconia crowns were designed using CAD/ CAM software and then milled from partially stabilized zirconia blocks. After all crowns were cemented onto Ti-base abutments, they were clinically screwed onto the implants. Both implants and crowns were followed up for up to 5 years, and their clinical, technical, and radiologic results were recorded. Results: A total of 118 patients (86 women and 32 men) who received 182 implant-supported screw-mentable crowns were included in this study. The mean follow-up period was 32 ± 18 months (range: 24 to 60 months) for all implants and crowns. No implant was lost during the follow-up period, yielding a cumulative implant survival rate of 100%. Two technical complications were observed in two bruxer patients, yielding a cumulative restoration survival rate of 98.9%. The marginal bone loss was 0.7 ± 0.5 mm from the baseline radiograph to the radiograph taken at the final recall visit. No implants were diagnosed with peri-implantitis. Conclusion: The outcomes of this study suggest that Ti-base abutments are a feasible and affordable alternative to CAD/CAM abutments and that they can successfully support single zirconia crowns.
This study evaluated the clinical performance of implant supported, extra-orally cemented, monolithic zirconia crowns after a follow-up to 18 months. Thirty-one patients with 50 posterior dental implants were consecutively selected for this study. A total of 50 crowns were cemented onto titanium abutments extra-orally and then screwed to the implants with the required torque intra-orally. The patients were followed at 12 months and 18 months after placement of restorations. During the follow-up period, all restorations were evaluated according to following technical parameters: implant failure, crown fracture, screw loosening, loss of retention due to decementation, fracture of antagonist tooth or restoration. Data were analyzed using Kaplan Meier method. One implant and its corresponding crown was lost during the follow-up period, yielding a 18 months survival rate of 98%. During the study, 2 complication events were observed, including one screw loosening and one veneering porcelain chipping in an antagonist bilayered zirconia restoration. The overall success rate of the observed prosthesis was 96%. According to the results of this study, the extra-orally cemented, monolithic zirconia crowns resulted in a favorable short-term outcome for posterior implant supported restorations within this short observation time.
Clinical Guideline for Zirconia Dental Implants A Comprehensive and Critical Review and Update
Journal of Clinical Medical Research, 2024
Zirconia implants have become a very promising alternative to conventional titanium implants for oral rehabilitation with superior biological and esthetical properties. An electronic search through PubMed about zirconia dental implants has been performed in the English language. Zirconium dioxide implants demonstrate excellent biocompatibility, gingival adhesiveness and esthetic benefits. The evidence for one-piece ceramic implants has become strong enough that these implants have a similar range of indications as titanium implants and can be used in the same situations. However, lack of evidence for long-term success of two piece zirconia Implants above 5 years are considered to be a drawback.
The International journal of prosthodontics, 2004
PURPOSE This prospective clinical study evaluated an experimental implant abutment made of densely sintered zirconia with respect to peri-implant hard and soft tissue reaction as well as fracture resistance over time. MATERIALS AND METHODS Twenty-seven consecutively treated patients with 54 single-tooth implants were included. Zirconia abutment ingots were individually shaped and set on the implants with gold screws. All-ceramic (Empress I) crowns were cemented using a composite cement. At the 1- and 4-year examinations, reconstructions were evaluated for technical problems (fracture of abutment or crown, loosening of abutment screw). Modified Plaque and simplified Gingival Indices were recorded at implants and neighboring teeth, and peri-implant bone levels were radiographically determined. RESULTS All but 1 of the 27 patients with 53 restorations could be evaluated at 1 year, and 36 restorations in 18 patients were evaluated 4 years after abutment and crown insertion. The median o...