Surgical and Prosthetic Outcomes of 967 Implants Under Immediate or Delayed Loading in Full-Arch Rehabilitation: a Retrospective Study With up To 5 Years of Follow-Up

Objective: The aim of this study was to evaluate implant and prosthesis survival rates in full-arch rehabilitation supported by implants with platform-switched Morse taper connection submitted to immediate or delayed loading, after up to 5 years of follow-up. Material and Methods: Data was retrospectively collected from clinical records of patients who were treated by means of implant-supported full-arch rehabilitation. Survival rates of implants and prostheses were evaluated according to immediate or delayed loading. Results: The sample comprised 967 implants. Of those, 627 were submitted to immediate loading (IL) while 340 to delayed loading (DL). After a follow-up period of up to 5 years, the implant survival rate for IL was of 99.7% (622/627 implants) and 97.2% (333/340 implants) for DL. The overall implant survival rate was 98.8% (955/967 implants). Prosthesis survival rate was 100% (N = 178) for both groups. Significantly more implants in the DL group presented bone loss (p > 0.01), either greater or lower than 2 mm, during the follow-up period. Conclusion: Within their limits, the present results suggest that full-arch rehabilitation with platform-switched Morse taper connection implants can lead to surgical and prosthetic predictable outcomes. Moreover, immediate loading protocol seems to be a good option for the rehabilitation of fully edentulous patients, as it involves a shorter treatment time, which may lead to greater patient satisfaction. Keywords Dental implants; Rehabilitation; Survival rate; Retrospective study.

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Survival Rate of 1008 Short Dental Implants with 21 Months of Average Follow-Up: A Retrospective Study

Journal of Clinical Medicine ◽

10.3390/jcm9123943 ◽

2020 ◽

Vol 9 (12) ◽

pp. 3943

Author(s):

João Caramês ◽

Ana Catarina Pinto ◽

Gonçalo Caramês ◽

Helena Francisco ◽

Joana Fialho ◽

...

Keyword(s):

Retrospective Study ◽

Survival Rate ◽

Dental Implants ◽

Cox Regression ◽

Survival Rates ◽

High Survival ◽

Implant Survival ◽

Posterior Maxilla ◽

Clinical Records

This retrospective study evaluated the survival rate of short, sandblasted acid-etched surfaced implants with 6 and 8 mm lengths with at least 120 days of follow-up. Data concerning patient, implant and surgery characteristics were retrieved from clinical records. Sandblasted and acid-etched (SLA)-surfaced tissue-level 6 mm (TL6) or 8 mm (TL8) implants or bone-level tapered 8 mm (BLT8) implants were used. Absolute and relative frequency distributions were calculated for qualitative variables and mean values and standard deviations for quantitative variables. A Cox regression model was performed to verify whether type, length and/or width influence the implant survival. The cumulative implant survival rate was assessed by time-to-event analyses (Kaplan–Meier estimator). In all, 513 patients with a mean age of 58.00 ± 12.44 years received 1008 dental implants with a mean follow-up of 21.57 ± 10.77 months. Most implants (78.17%) presented a 4.1 mm diameter, and the most frequent indication was a partially edentulous arch (44.15%). The most frequent locations were the posterior mandible (53.97%) and the posterior maxilla (31.55%). No significant differences were found in survival rates between groups of type, length and width of implant with the cumulative rate being 97.7% ± 0.5%. Within the limitations of this study, the evaluated short implants are a predictable option with high survival rates during the follow-up without statistical differences between the appraised types, lengths and widths.

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Tilted Implants for Full-Arch Rehabilitations in Completely Edentulous Maxilla: A Retrospective Study

International Journal of Dentistry ◽

10.1155/2012/180379 ◽

2012 ◽

Vol 2012 ◽

pp. 1-6 ◽

Cited By ~ 18

Author(s):

Nicolò Cavalli ◽

Bruno Barbaro ◽

Davide Spasari ◽

Francesco Azzola ◽

Alberto Ciatti ◽

...

Keyword(s):

Treatment Outcome ◽

Retrospective Study ◽

Survival Rate ◽

Joint Pain ◽

Implant Survival ◽

Temporomandibular Joint Pain ◽

Implant Survival Rate ◽

Prosthetic Complications ◽

Viable Treatment

Purpose. The aims of this study were to assess the treatment outcome of immediately loaded full-arch fixed bridges anchored to both tilted and axially placed implants in the edentulous maxilla and to evaluate the incidence of biological and prosthetic complications.Materials and Methods. Thirty-four patients (18 women and 16 men) were included in the study. Each patient received a maxillary full-arch fixed bridge supported by two axial implants and two distal tilted implants. A total of 136 implants were inserted. Loading was applied within 48 hours of surgery and definitive restorations were placed 4 to 6 months later. Patients were scheduled for followup at 6, 12, 18, and 24 months and annually up to 5 years. At each followup plaque level and bleeding scores were assessed and every complication was recorded.Results. The overall follow-up range was 12 to 73 months (mean 38.8 months). No implant failures were recorded to date, leading to a cumulative implant survival rate of 100%. Biological complications were recorded such as alveolar mucositis (11.8% patients), peri-implantitis (5.9% patients), and temporomandibular joint pain (5.9% patients). The most common prosthetic complications were the fracture or detachment of one or multiple acrylic teeth in both the temporary (20.6% patients) and definitive (17.7% patients) prosthesis and the minor acrylic fractures in the temporary (14.7% patients) and definitive (2.9% patients) prosthesis. Hygienic complications occurred in 38.2% patients. No patients’ dissatisfactions were recorded.Conclusions. The high cumulative implant survival rate indicates that this technique could be considered a viable treatment option. An effective recall program is important to early intercept and correct prosthetic and biologic complications in order to avoid implant and prosthetic failures.

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Short (6 mm) and Regular Dental Implants in the Posterior Maxilla–7-Years Follow-up Study

Journal of Clinical Medicine ◽

10.3390/jcm10050940 ◽

2021 ◽

Vol 10 (5) ◽

pp. 940

Author(s):

Jakub Hadzik ◽

Paweł Kubasiewicz-Ross ◽

Izabela Nawrot-Hadzik ◽

Tomasz Gedrange ◽

Artur Pitułaj ◽

...

Keyword(s):

Survival Rate ◽

Dental Implants ◽

Clinical Results ◽

Implant Survival ◽

Implant Survival Rate ◽

Short Implants ◽

Posterior Maxilla ◽

Patient Reported ◽

Bone Level

Short 6 mm dental implants are considered as an alternative to the maxillary sinus elevation and bone augmentation procedure where there is a reduced alveolar ridge height. The aim of this study was to compare the implant survival rate between short dental implants (6 mm) and regular length implants (11–13 mm) when placed in combination with bone grafting and loaded with a single non splinted crown, seven years after placing the implant. It was conducted as a controlled clinical study of 30 patients with partial edentulism in the posterior maxilla. The protocol included radiological and clinical evaluation of the C/I ratio (length of the superstructure divided by the length of the implant crestal part), marginal bone level (MBL), ultrasonography measurement of soft tissue surrounding implant (STT), patient-reported outcomes, and biological and technical complications. A total number of 28 implants (93%) remained integrated during follow-up period. MBL of 0.50 and 0.52 mm was observed for short implants and regular implants, respectively. MBL was checked for correlation with STT, and a negative correlation was found between MBL: STT. Our study has demonstrated a significantly lower implant survival rate for short implants compared to regular implants (87% compared to 100%). Despite the loss of several implants, good clinical results were achieved in the remaining implants in both groups. It is, therefore, worth considering short implants as an alternative to regular implants with a sinus lift surgery.

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Implant survival rate in calvarial bone grafts: A retrospective clinical study with 10 year follow‐up

Clinical Implant Dentistry and Related Research ◽

10.1111/cid.12799 ◽

2019 ◽

Cited By ~ 7

Author(s):

Raffaele Vinci ◽

Giulia Teté ◽

Federico Raimondi Lucchetti ◽

Paolo Capparé ◽

Enrico Felice Gherlone

Keyword(s):

Clinical Study ◽

Survival Rate ◽

Bone Grafts ◽

Implant Survival ◽

Calvarial Bone ◽

Implant Survival Rate ◽

Retrospective Clinical Study

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Immediate Loading of Unsplinted Implant Retained Mandibular Overdenture: A Randomized Controlled Clinical Study

Journal of Oral Implantology ◽

10.1563/aaid-joi-d-18-00202 ◽

2019 ◽

Vol 45 (5) ◽

pp. 378-389 ◽

Cited By ~ 2

Author(s):

Ahmad Kutkut ◽

Mohamed Rezk ◽

Dominique Zephyr ◽

Dolphus Dawson ◽

Robert Frazer ◽

...

Keyword(s):

Clinical Study ◽

Survival Rate ◽

Test Group ◽

Immediate Loading ◽

Control Group ◽

Gingival Index ◽

Implant Survival ◽

Implant Stability ◽

Treatment Groups ◽

Implant Survival Rate

This clinical study aimed to clinically and radiographically compare the implant survival rate and peri-implant tissue response between immediate and delayed loading protocols for unsplinted implant retained mandibular overdentures. Twenty patients were enrolled to participate in this study. Each subject was randomly assigned to 1 of 2 treatment groups: test group patients' implants (n = 10), which were immediately loaded, and control group patients' implants (n = 10), which were conventionally loaded. Locator abutments were torqued to 15 Ncm at delivery. Attachments were picked up intraorally immediately after implant placement for the test group and at 3 months for the control group, and 3-lb retention inserts were placed. Marginal bone levels based on cone beam computed tomography fixed reference points were recorded at baseline and 12 months. Modified plaque index, gingival index, and implant stability quotients were recorded at baseline, 3 months, and 12 months. After 12 months, implant survival rate was 100% in both groups. Marginal bone levels, keratinized mucosa, modified plaque index, and gingival index were significantly different among the groups at 3- and 12-month intervals, whereas no significant differences were found in implant stability quotients between the groups. The fact that implant survival rate was 100% in both treatment groups suggests that, within the limitations of this study, immediate loading protocol for unsplinted implant retained mandibular complete overdenture is as predictable, safe, and successful as the delayed loading protocol. Implementing the immediate loading protocol for mandibular implant retained overdentures could shorten treatment time, which could lead to better patient's satisfaction.

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The Ball Welding Bar: A New Solution for the Immediate Loading of Screw-Retained, Mandibular Fixed Full Arch Prostheses

International Journal of Dentistry ◽

10.1155/2017/2679085 ◽

2017 ◽

Vol 2017 ◽

pp. 1-9

Author(s):

Danilo Bacchiocchi ◽

Andrea Guida

Keyword(s):

Survival Rate ◽

Immediate Loading ◽

Implant Survival ◽

Reliable Technique ◽

Masticatory Function ◽

Link Type ◽

Implant Survival Rate ◽

Welding Technique

Purpose. To present a new intraoral welding technique, which can be used to manufacture screw-retained, mandibular fixed full-arch prostheses. Methods. Over a 4-year period, all patients with complete mandibular edentulism or irreparably compromised mandibular dentition, who will restore the masticatory function with a fixed mandibular prosthesis, were considered for inclusion in this study. The “Ball Welding Bar” (BWB) technique is characterised by smooth prosthetic cylinders, interconnected by means of titanium bars which are adjustable in terms of distance from ball terminals and are inserted in the rotating rings of the cylinders. All the components are welded and self-posing. Results. Forty-two patients (18 males; 24 females; mean age 64.2±6.7 years) were enrolled and 210 fixtures were inserted to support 42 mandibular screw-retained, fixed full-arch prostheses. After two years of loading, 2 fixtures were lost, for an implant survival rate of 97.7%. Five implants suffered from peri-implant mucositis and 3 implants for peri-implantitis. Three of the prostheses (3/42) required repair for fracture (7.1%): the prosthetic success was 92.9%. Conclusions. The BWB technique seems to represent a reliable technique for the fabrication of screw-retained mandibular fixed full-arch prostheses. This study was registered in the ISRCTN register with number ISRCTN71229338.

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Comparison of Clinical Parameters in Dental Implant Therapy between Implant Site Development Using Porcine- and Bovine-Derived Xenografts

Technologies ◽

10.3390/technologies9040072 ◽

2021 ◽

Vol 9 (4) ◽

pp. 72

Author(s):

Li-Ching Chang

Keyword(s):

Retrospective Study ◽

Survival Rate ◽

Dental Implant ◽

Bovine Bone ◽

Clinical Parameters ◽

Implant Survival ◽

Site Development ◽

Dental Implantation ◽

Implant Survival Rate ◽

Implant Therapy

Purpose: The aim of this study is to compare the effects of two xenografts, i.e., porcine- and bovine-derived xenografts, on dental implant therapy after implant site development. Materials and Methods: This retrospective study involved adults who underwent dental implantation between January 2012 and December 2020. Various patient and implant-site characteristics were collected from the patient records. The implant-surgery clinical parameters of the porcine- and bovine-derived xenografts used for implant site development were analyzed and compared. Results: A total of 116 subjects with 168 dental implants were included in this study. There was less soft bone in the porcine bone group of the maxilla. However, there was less soft bone and a greater percentage of “primary stability ≥35 N” in the bovine bone group of the mandible. However, no significant differences in regrafting rate, post-operative infection rate, or implant survival rate were found between the bovine and porcine bone groups. Conclusion: The effects of implant site development using bovine- and porcine-origin xenografts are comparable in terms of the implant-therapy clinical parameters, including the regrafting rate and implant survival rate. Thus, the choice of xenografts could be made according to the patient’s religious requirements. However, the reported results should be used with caution, considering the limitations of this retrospective study.

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Effect of Maxillary Sinus Membrane Perforation on Implant Survival Rate: A Retrospective Study

The International Journal of Oral & Maxillofacial Implants ◽

10.11607/jomi.4419 ◽

2017 ◽

Vol 32 (2) ◽

pp. 401-407 ◽

Cited By ~ 13

Author(s):

Carlos de Almeida Ferreira ◽

Carolina Martinelli ◽

Arthur Novaes ◽

Túlio Pignaton ◽

Camila Guignone ◽

...

Keyword(s):

Retrospective Study ◽

Survival Rate ◽

Maxillary Sinus ◽

Implant Survival ◽

Implant Survival Rate ◽

Membrane Perforation ◽

Sinus Membrane

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Prefabricated Bar System for Immediate Loading in Edentulous Patients: A 5-Year Follow-Up Prospective Longitudinal Study

BioMed Research International ◽

10.1155/2018/7352125 ◽

2018 ◽

Vol 2018 ◽

pp. 1-7 ◽

Cited By ~ 4

Author(s):

Enrico F. Gherlone ◽

Gianpaolo Sannino ◽

Andrea Rapanelli ◽

Roberto Crespi ◽

Giorgio Gastaldi ◽

...

Keyword(s):

Survival Rate ◽

Survival Rates ◽

Implant Survival ◽

Marginal Bone Loss ◽

Prospective Longitudinal Study ◽

Bone Level ◽

New Type ◽

Edentulous Patients ◽

Prospective Longitudinal

Objectives. The aim of this clinical study was to evaluate a new type of prefabricated bar system, supported by axial and tilted implants at 5-year follow-up. Materials and Methods. Twenty-nine consecutive participants (19 females, 10 males) (mean age 61.4 years), edentulous in one or both jaws, with severe atrophy of the posterior regions, were treated according to the All-on-four® protocol with immediately loaded axial (64) and tilted (64) implants supporting complete-arch screw-retained prostheses (12 maxillary, 20 mandibular) featuring a prefabricated bar as framework. Follow-up visits were performed at 3, 6, 12, 24, 48, and 60 months after implant insertion. Radiographic assessments were made using panoramic radiographs obtained immediately after surgery and at each follow-up visit. Bone level measurements around the axial and tilted implants were compared by means of the Student’s t-test. Results. One axial implant failed in the lower jaw and did not compromise prosthetic function. The 60-month overall implant survival rate was 100% for axially positioned implants and 98.44% for tilted implants. The implant survival rates were 100% in the maxilla and 98.75% in the mandible. None of the 32 fixed prostheses were lost during the observation period, representing a prosthetic survival rate of 100%. No statistically significant differences (P>0.05) in marginal bone loss between tilted and axial implants were detected in either jaw over time. Conclusions. The use of the evaluated prefabricated bar for immediately loaded implants placed according to the All-on-four concept may significantly reduce implant failures; however, more long-term prospective clinical trials are needed to affirm the effectiveness of the surgical-prosthetic protocol.

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