1,720,970 research outputs found
Implant-retained removable partial dentures: a 10 year retrospective study. Part II: prosthetic complications and patient satisfaction.
No full textObjective: Aim of this study is to evaluate patient satisfaction and prosthetic complications of removable partial dentures (RPDs) retained (but not supported) by dental implants.
Materials and Methods: We retrospectively evaluated 32 consecutive patients who received implant-retained RPDs. Each patient received one to four endosseus implants; the sample included a total of 64 implants. Follow-up was conducted for a minimum of 10 years, during which prosthetic complications and patient satisfaction were evaluated.
Results: Our results demonstrated a systematic increase in patient satisfaction after receiving an IR-RPD. Prosthetic complications are: 4 cases of loose abutment in 3 patients; 35 tooth substitution in 25 patients; 14 adjunctive relinings (respect the conventional 1 each 2 years) in 7 patients.
Conclusions: The combined use of implants and traditional RPDs increases patient satisfaction. Prosthetic complications are infrequent, easily solvable and economically less expensive for the patient
Implant-retained removable partial dentures: a 10 year retrospective study. Part I
No full textObjective: Aim of this study is to evaluate patient satisfaction and prosthetic complications of removable partial dentures (RPDs) retained (but not supported) by dental implants.
Materials and Methods: We retrospectively evaluated 32 consecutive patients who received implant-retained RPDs. Each patient received one to four endosseus implants; the sample included a total of 64 implants. Follow-up was conducted for a minimum of 10 years, during which prosthetic complications and patient satisfaction were evaluated.
Results: Our results demonstrated a systematic increase in patient satisfaction after receiving an IR-RPD. Prosthetic complications are: 4 cases of loose abutment in 3 patients; 35 tooth substitution in 25 patients; 14 adjunctive relinings (respect the conventional 1 each 2 years) in 7 patients.
Conclusions: The combined use of implants and traditional RPDs increases patient satisfaction. Prosthetic complications are infrequent, easily solvable and economically less expensive for the patient
Clinical efficacy of an implant impression material (Elite Implant) for immediate loading:case series.
No full textObjective: In a previous study, Human gingival fibroblasts cultured in vitro have been exposed directly to Elite Implant (Zhermack, Badia Polesine, Rovigo). The gingival fibroblasts proliferation and vitality are unaffected by the presence of Elite Implant. The aim of this study is to evaluate the clinical efficacy of this elastomeric sterile and radiopaque impression material, indicated for the immediate implant loading protocol.
Materials and Methods: A case series of 14 cases of implant rehabilitation treated with immediate loading protocol have been followed for 20 months.
Results: Out of 62 implant placed we had 1 failure (98,4% success) and no prosthetic failures; the use of this material allowed us to control if in the post surgical radiographs was present a radiopacity of the trapped material; this event didn't happened.
Conclusions: This impression material may represent a safe medical device for clinical and surgical applications. In addition, this material is radiopaque and, thus, can be identified radiographically
Implant Bridge Rehabilitations: Equator Profile Vs Multi Unit Abutment.
No full textObjective:
The aim of this clinical study was to compare innovative OT Equator Profile (EP) Attachment (Rhein83, Bologna, Italy) with MUA supporting full arch implant rehabilitations. The evaluations regard: patient satisfaction, number of clinical sessions, prosthetic complications, survival rates.
Method:
The 15 Participating Patients (7 males, 8 females, mean age 70 ±10years) with full-arch implant retained by OT EP Attachment (4 males,4 females) and MUA (3 males, 4 females) participated in this clinical study. From 4 to 8 implants were placed in edentulous arch . Fixed Provisional rehabilitations are loaded immediately. Prosthetic rehabilitation was final realized after 6 weeks. Were compared the overall technical time to realize the final prosthesis with the two methods. Patient’s satisfaction was evaluated with a questionnaire with a VAS from 1 to 5. Survival rates and maintenance procedures or prosthetic complications were also recorded during the follow-up period.
Result:
Patient satisfaction was 4.35 ± 0.37 for EP reahabilitations and 4.25 ±0.26 for MUA reahabilitations . The number of technical passages and time of realization with both methods resulted Significantly Reduced Compared to conventional procedures. During a mean observation time of 24 ± 2 months no implant was lost and no peri-implantitis occurred (100% survival rate). Maintenance: No prosthetic complication occurred.
Conclusion:
We can conclude that EP and MUA get the same clinical findings in terms of patient satisfaction and prosthetic success; Equator Profile has shown more versatility and ease of use in the management of implant with limited parallel and prosthetic phases
Toronto Bridge Rehabilitations: simplified procedures using a new universal abutbment.
No full textObjective:
The purpose of this work is to evaluate clinical procedures simplification in fixed implant rehabilitations using OT Equator Profile (Rhein83, Bologna, Italy) attachments.
Method:
21 Patients (7 males, 14 females, mean age 70±10 years) with full-arch fixed implant rehabilitations retained by innovative abutments EP were included in this clinical trial. From 4 to 7 implants were placed in edentulous arch . Fixed temporary rehabilitations are loaded immediately. Fixed definitive rehabilitation was realized 6-8 weeks after implant surgery. We evaluated the number of clinical patient sessions needed to achieve the final restorations.
Result:
The number of clinical steps and time of realization in the 21 cases under
review resulted significantly reduced compared to standard procedures. The number of clinical sessions ranged between 3 and 4 (for 9 patients was 3, while for 12 patients was 4).
Conclusion:
This innovative abutment allows the realization of fixed implant rehabilitations in 3 or 4 clinical sessions, while the conventional techniques require at least 5. This procedure uses only a single prosthetic implant transmucosal abutment during the entire treatment plan: Equator Profile is capable of concentrating in a single piece healing screw, the temporary abutment and the final abutment
GBR with Ultra-Thin Titanium Mesh and Coral-Derived Hydroxyapatite.
No full textObjective:
The purpose of this pilot study is to test the regenerative potential of new ultra-thin (<0,2mm) titanium membranes used in combination with a coral-derived hydroxyapatite grafting material (T-barrier, B&B Dental Implant Company S.r.l., Bologna, Italy); we also would like to validate a surgical protocol suitable for this technique that allows us to undertake a prospective study, excluding the initial learning curve.
Method:
10 suitable patients were selected (intrabony defects >3mm, insufficient bone height/thickness for >4x6mm implants). After full-mouth disinfection, it was raised a full-thickness flap, the bone surface has been regularised, inserted the graft material of coral-derived hydroxyapatite and placed the ultra-thin titanium membrane fixed at the implant using a surgical screw and finally the flap sutured with non-absorbable 4.0 silk sutures. Patients were left healing for 4 months before prosthetic phase. 12 implants have been inserted. Periapical radiographs were taken immediately after implant placement, at the prosthetic phase, and at 1-year follow-up.
Result:
In 10 cases carried out, followed for at least 12 months clinically and radiographically, there were no rejection of titanium mesh and no implant failures. Average supracrestal new bone formation amounted to 1.52±1.04 mm. In only one case, the flap showed a dehiscence, probably due to a poor oral hygiene of the patient, with titanium mesh exposure (90% overall success).
Conclusion:
From this preliminary pilot study the ultra-thin titanium mesh used in combination with a coral-derived hydroxyapatite grafting material seems to be reliable and easy to use
Transcrestal Sinus Floor Elevation with Coral-Derived Hydroxyapatite: pilot study.
No full textObjective:
The purpose of this pilot study is to set a mini-invasive surgical protocol for the rehabilitation of edentulous posterior maxilla, consisting of the positioning of short or standard implants in combination with sinus lifting, with the adjunct of coral-derived hydroxyapatite (Duravit Crestal Sinus Lift & Novocore Plus by B&B Dental Implant Company S.r.l.,Bologna, Italy).
Method:
12 patients with residual bone height <4mm were included in this pilot study. After the elevation of a full-thickness flap, the cortical bone has been perfored with a pilot drill. The guide path has expanded with a compactor-expander 2mm wide, then 3mm wide and then, depending from the bone thickness, 4mm wide compactor was used. All these compactor were used 1mm inside the sinus. Coral-derived hydroxyapatite was placed by injector into the surgical cavity and the pushed into the sinus to elevate the membrane. Finally the implant was placed. All implant site were underprepared to achieve implant primary stability. After implant placement, the flap was repositioned and sutured with 4.0 non-adsorbable sutures. All patients received a standard post-surgical and maintenance protocol. Periapical radiographs were taken immediately after implant placement, at the prosthetic phase, and at each follow-up visit. Patients were left healing for 4 months before prosthetic phase. 12 implants have been inserted. All implants supports a screw-retained single-crown prosthesis.
Result:
All 12 implant placed achieved osseintegretion. Overall implant success and survival rates were 100% and average marginal bone loss was 0.60±0.2mm at 1 year follow-up visit. All prosthetic rehabilitations were successful and in function.
Conclusion:
Within the limits of this pilot study the proposed treatment protocol for mini invasive sinus floor elevation seems to be a viable option for rehabilitation of edentulous posterior atrophic maxilla
SEM Analysis of Sandblasted Double Acid Etched Titanium Implant.
No full textObjective:
The purpose of this work is to determine the surface morphology obtained by sandblasting and double treatment with acids of titanium implants (BioActive Treatment, B&B Dental Implant Company S.r.l., Bologna, Italy).
Method:
Implant surfaces are sandblasted with alumina oxide (Al203) by using a dedicated appliance. The surface is treated with a double etching by using mineral acids (phosphoric acid). Implant surfaces are cleaned with Argon plasma in a class 10.000 clean room, to guarantee the absence of environmental contamination. As an efficacy test, surfaces undergo x-ray photoelectron spectroscopy (XPS or ESCA). The surface topography of the implants was evaluated by Scanning Electron Microscope (SEM). Roughness was evaluated quantitatively using dedicated software to convert conventional SEM images into three-dimensional data (Mex 4.2, Alicona Imaging GmbH, Graz, Austria). EDX (Energy Dispersive X-ray spectroscopy) analysis was performed.
Result:
The SEM observation shows, in a low magnification (200x), a nice machining work, together with a homogeneous surface finish without particles or blasting residuals. Increasing the magnification, (2500-5000x) show the typical structure of micro-roughness surfaces treated with double acid attack. Values emerged from stereo SEM analysis:Ra 3.19 ± 1.06, Rq 4.78±1.15, Rt 11.41±1.06. EDX analysis confirms that the only elements detected are Ti, Al and V.
Conclusion:
As known and reported in the scientific literature, this micro-topography enables the surface to act as a “sponge”, interacting strongly with the clot and stimulating bone regeneration. The initial roughness level favours osteoblast cells anchor and the integration with the bone tissue, reducing the osseointegration time. With the limits of this study, this treatment seem to obtain by subtraction an implant surface with a controlled micro-roughness and absence of contaminants or foreign deposits
A New Volumetric Parameter for a Comparative Finite-Element Analysis of a Six- or Four-Implant Mandibular Total-Arch Rehabilitation
Get PDFIn a full-arch implant rehabilitation ad modum Branemark, the distribution of stress and strain in mandibular bone is influenced by the type, number and position of implants used. In particular, the biomechanical behaviour of the bone structure after complete osseointegration depends on the load transferred to the bone by each fixture. In this study, a finite-element analysis of two models was performed. Models of an all-on-four configuration and a six-implant configuration were com- pared in a worst-case scenario. A new V parameter is presented to aid the quantitative and com- parative analysis of the all-on-four and six-implant configurations. The influence of orthotropy was also investigated, and a geometric change in the all-on-four configuration is presented
Full-mouth rehabilitation, a new immediate loading technique: Case report.
No full textOBJECTIVE:
Today, there is evidence that, under certain conditions, early (within 3 weeks days after surgery) and immediately (within 3 days after surgery) loaded implants have survival rates similar to delayed loaded implants. The aim of the present study is to describe an innovative clinical and technical procedure to achieve immediate loading with a complete mandibular and maxillar fixed bridge; we tested 2 different kind of abutments in the same arch to verify clinical ease of use and reliability.
CASE PRESENTATION:
75 year old man, RPDs wearer. After full-mouth disinfection, in the first surgical stage the mandible was treated extracting the remaining teeth and roots. It was raised a full-thickness flap, the bone surface has been regularised, 6 implants inter-foramina were placed immediately after tooth and root extraction. 2 innovative abutments (OT Equator Profile, Rhein83, Bologna, Italy) were screwed to two implants and 4 Multi Unit Abutments (Nobel Biocare, Zürich-Flughafen, Switzerland) screwed to the others. Implant position was immediately transferred with the direct transfer technique and sterile silicone impression material (Elite Implant Medium, Zhermack S.p.a., Badia Polesine, Italy) which provides accurate implant position reproduction. A provisional prosthesis was relined directly after the suture stage, linking the provisional abutments, then refined and delivered within 6 hours.
n a second surgical stage 8 implants were placed in the maxilla and 8 Equator Profile abutments were used. The same clinical and technical protocol used to rehabilitate the mandible was adopted. Periapical radiographs were taken immediately after implant placement, at the prosthetic phase, and at 1-year follow-up.
RESULTS :
In this case report the technique used to provide in few hours an immediate screw-retained fixed prosthesis allowed us to obtain satisfactory results with less effort and major ease of use than conventional procedure. After 3 years of function we had no loss of implants or prothetic problems. Patient satisfaction has improved using this protocol, probably due to the changeover from a removable to a fixed prosthesis.
CONCLUSIONS:
This type of implant-supported fixed prosthesis confirms its efficiency in the immediate rehabilitation of edentulous jaws. Besides less discomfort for the patient, a gain of time and a reduction in post-operative care, immediate loading has a remarkable, positive psychological impact on the patient. This technique, in the light of recent literature and evaluating ease of use and patient satisfaction, seems to be reliable in managing even complex implant cases
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