Implant Survival and Crestal Bone Loss Around Extra-Short Implants Supporting a Fixed Denture: The Effect of Crown Height Space, Crown-to-Implant Ratio, and Offset Placement of the Prosthesis

The purpose of this retrospective study was to determine survival and peri-implant marginal bone loss of short and ultra-short implants placed in the posterior mandible. A total of 98 patients received 201 locking-taper implants between January 2014 and January 2015. Implants were placed with a 2-stage approach and restored with single crowns. Clinical and radiographic examinations were performed at 3-year recall appointments. At that time, the proportion of implant survival by length, and variations of crestal bone levels (mean crestal bone loss and mean apical shift of the “first bone-to-implant contact point” position) were assessed. Significance level was set at 0.05. The total number of implants examined 36 months after loading included: 71 implants, 8.0 mm in length; 82 implants, 6.0 mm in length; and 48 implants, 5.0 mm in length. Five implants failed. The overall proportion of survival was 97.51%, with 98.59% for the 8.0-mm implants, 97.56% for the 6.0-mm implants, and 95.83% for the 5.0-mm implants. No statistically significant differences were found among the groups regarding implant survival (P = .73), mean crestal bone loss (P = .31), or mean apical shift of the “first bone-to-implant contact point” position (P = .36). Single-crown short and ultra-short implants may offer predictable outcomes in the atrophic posterior mandibular regions, though further investigations with longer follow-up evaluations are necessary to validate our results.

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Assessment of Peri-Implant Soft Tissues Conditions around Short and Ultra-Short Implant-Supported Single Crowns: A 3-Year Retrospective Study on Periodontally Healthy Patients and Patients with a History of Periodontal Disease

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph17249354 ◽

2020 ◽

Vol 17 (24) ◽

pp. 9354

Author(s):

Giorgio Lombardo ◽

Annarita Signoriello ◽

Mauro Marincola ◽

Pier Francesco Nocini

Keyword(s):

Retrospective Study ◽

Bone Loss ◽

Periodontal Disease ◽

Soft Tissues ◽

Implant Survival ◽

Marginal Bone Loss ◽

Implant Complications ◽

Short Implants ◽

History Of ◽

Single Crowns

The aim of this retrospective study was to evaluate implant survival, marginal bone loss and peri-implant complications in 326 short and ultra-short implants. Implants were placed in the maxillary and mandibular posterior regions of 140 patients with (PP) and without (NPP) a history of periodontal disease. Clinical and radiographic examinations were performed at 3-year recall appointments. The 8.0, 6.0 and 5.0 mm-length implants placed in PP and NPP were respectively 43.75% and 38.46%, 35.10% and 34.19%, 21.15% and 27.35%; 325 implants (one early failure) were rehabilitated with single crowns in 139 patients. Overall implant survival after 3 years of follow-up was 97.55%, 98.08% and 96.61% for PP and NPP (p = 0.46). Crestal bone level variations were not statistically different among PP and NPP; 15.41% of implants presented signs of mucositis, 14.71% and 16.67% in PP and NPP (p = 0.64). Setting the threshold for bone loss at 2 mm after 36 months, peri-implantitis prevalence was 2.2%, 1.96% and 2.63% in PP and NPP (p = 0.7). Overall implant success was 82.39%, 83.33% and 80.7% for PP and NPP (p = 0.55). Short-term outcomes suggest that short and ultra-short locking-taper implants can successfully be restored with single crowns in the posterior jaws both in PP and NPP.

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Changing Preference of One- Vs. Two-Stage Implant Placement in Partially Edentulous Individuals: An 18-Year Retrospective Study

Applied Sciences ◽

10.3390/app10207060 ◽

2020 ◽

Vol 10 (20) ◽

pp. 7060

Author(s):

Liat Chaushu ◽

Sarit Naishlos ◽

Ofir Rosner ◽

Eran Zenziper ◽

Ari Glikman ◽

...

Keyword(s):

Retrospective Study ◽

Bone Loss ◽

Gingival Index ◽

Implant Survival ◽

Two Stage ◽

One Stage ◽

Implant Placement ◽

Crestal Bone Loss ◽

The One

The purpose of the present long-term retrospective study was to assess the changing preference of one- vs. two-stage implant placement in partially edentulous individuals. The clinical outcome measures were one- vs. two-stage implant placement, implant survival, and gingival index. The radiological outcome measure was crestal bone loss. Other recorded information included gender, age, implant characteristics (brand, type, length, diameter) and implant location (maxilla/mandible). A total of 393 implants in 111 patients were included. The results revealed that there were no significant demographic differences between the one- and two-stage implant placement groups. There was a preference for one-stage surgery when wide diameter implants were used and when the number of implants per patient was ≤3. The mandible was the major implant site in the one-stage surgery group. Crestal bone loss and gingival index were similar for the two groups in both the short and long term. It can be concluded that lack of any long-term differences in implant survival, crestal bone loss and gingival health around implants after one- or two-stage implant placement promoted a significant change over 18 years, increasing to 50% the prevalence of one-stage surgery.

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Implant Survival Rate and Marginal Bone Loss of 6-mm Short Implants: A 2-Year Clinical Report

The International Journal of Oral & Maxillofacial Implants ◽

10.11607/jomi.3729 ◽

2014 ◽

Vol 29 (6) ◽

pp. 1425-1428 ◽

Cited By ~ 13

Author(s):

Emanuel Bratu ◽

Hsun-Liang Chan ◽

Sorin Mihali ◽

Olimpiu Karancsi ◽

Dana Bratu ◽

...

Keyword(s):

Survival Rate ◽

Bone Loss ◽

Clinical Report ◽

Implant Survival ◽

Marginal Bone Loss ◽

Implant Survival Rate ◽

Short Implants

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High Crown to Implant Ratio as Stress Factor in Short Implants Therapy

Balkan Journal of Dental Medicine ◽

10.1515/bjdm-2016-0015 ◽

2016 ◽

Vol 20 (2) ◽

pp. 94-98

Author(s):

Ledia Gaxho ◽

R. Isufi ◽

E. Petrela ◽

L. Abazaj ◽

K. Vera

Keyword(s):

Cohort Study ◽

Bone Loss ◽

Panoramic Radiographs ◽

Crestal Bone Loss ◽

Short Implants ◽

Single Tooth ◽

The Mean ◽

As Stress ◽

Implant Loading ◽

Implant Treatment

Summary Background/Aim: The purpose of this study was to report the outcomes of crown to implant ratio (C/IR) measurements of single-tooth short implants. The specific aim of this study was to evaluate the effect of C/ IR on crestal bone loss, assessing the success of short locking-taper implants treatment.Materials and Methods: The cohort study was based on a sample of 33 patients, 14 males and 19 females. They were treated by at least one hydroxyapatite-coated Bicon implant, restored with Integrated Abutment Crown cementless technique and porcelain fused to metal crowns. The study was conducted between 2010 and 2015. Patients were recalled after 1-year and 2-year period time. Periapical, panoramic radiographs and clinical photos were obtained. The outcome measures were C/IR, crestal bone levels and the success of short implants therapy.Results: After all the measurements were done on the first day of implant loading and at last visit, the mean C/IR was 1.85 (range, 0.95 to 3.20) and the mean change in the mesio-distal crestal bone levels was -0.73mm. No significant correlation was found between the C/IR and the risk for crestal bone loss nor the risk for implant failure.Conclusions: A high C/IR has no significant effect on crestal bone levels (r= -0.151, p= 0.230) and on failure of implant treatment (p= 0.631) after the insertion of single-tooth locking-taper and implant restorations.

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CaPO4 Blasted Implants Inserted Into Iliac Crest Homologue Frozen Grafts

Journal of Oral Implantology ◽

10.1563/1548-1336-35.4.176 ◽

2009 ◽

Vol 35 (4) ◽

pp. 176-180 ◽

Cited By ~ 8

Author(s):

Maurizio Franco ◽

Leone Rigo ◽

Alessandro Viscione ◽

Bruno De Santis ◽

Emanuela Tropina ◽

...

Keyword(s):

Bone Loss ◽

Clinical Outcome ◽

Cox Regression ◽

Clinical Success ◽

High Survival ◽

Success Rates ◽

Marginal Bone Loss ◽

Crestal Bone Loss ◽

Short Implants ◽

Fresh Frozen

Abstract In the last decade, some investigations have reported that the resorbable blast media surface (also named CaPO4 blasted implants [CaPO4-BIs]) has achieved excellent results. However, no report regarding CaPO4-BIs inserted into fresh frozen bone (FFB) is available. Thus, we planned a retrospective study on a series of CaPO4-BIs inserted into FFB to evaluate their clinical outcome. In the period between December 2003 and December 2006, 16 patients (10 females and 6 males, median age of 55 years) were operated on, and 76 CaPO4-BIs were inserted. The mean implant follow-up was 23 months. Implant diameter and length ranged from 3.25 to 4.5 mm and from 11.5 to 15 mm, respectively. Implants were inserted to replace 7 incisors, 11 cuspids, 31 premolars, and 27 molars. Only 1 out of 76 implants was lost (ie, survival rate [SVR] = 98.7%), and no differences were detected among the studied variables. When peri-implant crestal bone resorption was used as an indicator of clinical success (ie, success rate), it was possible to identify some variables that correlated with a better clinical outcome. Specifically, Cox regression showed that removable prosthetic restoration and longer implant length correlated with a statistically significant lower delta implant abutment junction (IAJ; ie, reduced crestal bone loss) and thus a better clinical outcome. In this study, CaPO4-BIs had high survival and success rates, similar to those reported in previous reports of 2-stage procedures in nongrafted bone. CaPO4-BIs inserted into FFB are reliable devices, although greater marginal bone loss occurs when fixed prosthetic restorations and short implants are used.

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Clinical Comparation of Extra-Short (4 mm) and Long (>8 mm) Dental Implants Placed in Mandibular Bone: A Systematic Review and Metanalysis

Healthcare ◽

10.3390/healthcare9030315 ◽

2021 ◽

Vol 9 (3) ◽

pp. 315

Author(s):

Vittorio Moraschini ◽

Carlos Fernando de Almeida Barros Mourão ◽

Pietro Montemezzi ◽

Ingrid Chaves Cavalcante Kischinhevsky ◽

Daniel Costa Ferreira de Almeida ◽

...

Keyword(s):

Systematic Review ◽

Survival Rate ◽

Bone Loss ◽

Dental Implants ◽

Implant Survival ◽

Marginal Bone Loss ◽

Implant Survival Rate ◽

Short Implants ◽

Prosthetic Complications

This systematic review (SR) aimed to evaluate implant survival rate, marginal bone loss (MBL), and biological/prosthetic complications of extra-short 4 mm dental implants. An electronic search without language or date restrictions was performed in five databases and in gray literature for articles published until August 2020. Prospective cohort studies and randomized clinical trials (RCTs) that evaluated the clinical performance of extra-short 4 mm dental implants were included. Studies were independently assessed for risk of bias using the Cochrane Collaboration’s tool. The protocol of this SR was registered in the PROSPERO database under number CRD42019139709. Four studies were included in the present SR. There was no significant difference in implant survival rate (p = 0.75) between extra-short 4 mm and long implants. After 12 months of function, the extra-short implants had a significantly (p = 0.003) lower marginal bone loss (MBL) rate when compared to long implants. Extra-short implants had a lower number of biological and prosthetic complications when compared to long implants. After 12 months of follow-up, extra-short 4 mm dental implants placed in the mandible exhibit satisfactory clinical outcomes concerning implant survival rate and MBL when compared to longer implants, with a low number of biological and prosthetic complications. A higher number of RCTs with longer follow-up is necessary for the future.

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Relationship Between Crestal Bone Levels and Crown-to-Implant Ratio of Ultra-Short Implants With a Microrough Surface: A Prospective Study With 48 Months of Follow-Up

Journal of Oral Implantology ◽

10.1563/aaid-joi-d-17-00204 ◽

2019 ◽

Vol 45 (1) ◽

pp. 18-28 ◽

Cited By ~ 5

Author(s):

Luciano Malchiodi ◽

Erika Giacomazzi ◽

Alessandro Cucchi ◽

Giulia Ricciotti ◽

Riccardo Caricasulo ◽

...

Keyword(s):

Bone Loss ◽

Alveolar Bone ◽

Complication Rates ◽

Crestal Bone Loss ◽

Short Implants ◽

Bone Atrophy ◽

The Mean ◽

A Prospective Study ◽

The Relationship

The aim of this cohort study was to investigate the relationship between crestal bone levels and crown-to-implant ratio of ultra-short implants, after functional loading. Sixty patients with single or partial edentulism and alveolar bone atrophy were enrolled and treated between December 2009 and January 2016. Without using bone-grafting procedures, patients were rehabilitated with ultra-short implants characterized by a microrough surface and a 6-mm length. Clinical and anatomical crown-to-implant (C/I) ratios and crestal bone levels (CBL) were measured after a follow-up period ranging from 12 to 72 months; all peri-implant and prosthetic parameters were recorded. The data collected were statistically analyzed (P = .05). A total of 47 patients with 66 ultra-short implants were completely followed up according to described protocol. The mean follow-up was 48.5 ± 19.1 months. The mean anatomical C/I ratio was 2.2, while the mean clinical C/I ratio was 2.6 ± 0.6 at baseline and 2.8 ± 0.6 at the last follow-up appointment. Mean CBL as calculated at the baseline was 0.7 ± 0.5 mm, while at the last appointment it measured 1.0 ± 0.5 mm. The overall implant-based success rate was 96.9%, and the mean peri-implant bone loss (PBL) was 0.3 ± 0.3 mm. No statistically significant relationship was found between anatomical or clinical C/I ratio and PBL. Ultra-short implants appear to offer a predictable solution for implant-prosthetic rehabilitation in patients with edentulism and bone atrophy. A high percentage of implants were successful, with minimal crestal bone loss. The high C/I ratio did not appear to influence either peri-implant bone loss or prosthetic complication rates.

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