Clinical evaluation of short implants in atrophic posterior region

doi:10.19439/j.sjos.2018.04.013

Abstract

Abstract: PURPOSE: To evaluate the clinical effect of short implants in atrophic posterior region. METHODS: A total of 38 Bicon short implants (≤8 mm) were placed in 30 patients with 3-10 mm of bone height in the posterior region from January to December 2012. The follow-up period was 4 years, radiographic, clinical examination(improved plaque index, improved bleeding index, probing depth)were conducted and patient satisfactions were investigated with Oral Health Impact Profile (OHIP-I). Statistical analysis was performed using SPSS17.0 software package. RESULES: Implant survival rate of short implants was 100% and implant success rate was 94.7%. The mean peri-implant bone resorption value was (0.25±0.65) mm,the change of mesial and distal marginal bone was (-0.23±0.74) mm and (-0.27±0.59) mm, respectively. Crown to implant ratio (C/I)= 1.77±0.34, the implants were divided into 3 groups according to C/I≤1,1<C/I≤2 and C/I>2,there was no significant difference in marginal bone changes and no correlation between C/I and bone resorption. Through clinical examination,improved plaque index was 1.08±0.88,improved bleeding index was 1.11±0.83 and the average probing depth was (3.08±1.19) mm. OHIP-I score was 2.66±0.88, there was significant difference compared with preoperative OHIP-I score. CONCLUSIONS: Short implants are feasible and the success rate is high in the posterior region with insufficient bone height. The soft tissue around the short implants is in good health.While avoiding complex surgical procedures, reducing trauma, shortening the duration of treatment,short implants have a high degree of acceptance and the patient satisfactions are excellent.At the same time, regular preventive maintenance is important to maintain the long-term stability of implant dentures.

Key words: Short implant, Bone mass insufficient, Posterior area

CLC Number:

R782.1

ZHANG Jia, JIANG Huan-huan, SHANG Jiang, XU Sheng, LIU Zhong-hao. Clinical evaluation of short implants in atrophic posterior region[J]. Shanghai Journal of Stomatology, 2018, 27(4): 401-406.

References

[1] Fugazzotto PA.Shorter implants in clinical practice: rationale and treatment results[J]. Int J Oral Maxillofac Implants, 2008, 23(3): 487-496.
[2] Calvo-Guirado JL, López Torres JA, Dard M, et al.Evaluation of extrashort 4-mm implants in mandibular edentulous patients with reduced bone height in comparison with standard implants: a 12-month results[J]. Clin Oral Implants Res, 2016, 5(7): 867-874.
[3] Rossi F, Ricci E, Marchetti C, et al.Early loading of single crowns supported by 6-mm-long implants with a moderately rough surface: a prospective 2-year follow-up cohort study[J]. Clin Oral Implants Res, 2010, 21(9): 937-943.
[4] Srinivasan M, Vazquez L, Rieder P, et al.Survival rates of short (6 mm) micro-rough surface implants: a review of literature and meta-analysis[J]. Clin Oral Implants Res, 2014, 25(5): 539-545.
[5] Aksu AE, Dursun E, Calis M, et al.Intraoral use of extraoral implants for oral rehabilitation of a pediatric patient after resection of ewing sarcoma of the mandible and reconstruction with iliac osteocutaneous free flap[J]. J Craniofac Surg, 2014, 25(3): 930-933.
[6] Sohn DS, Kim WS, Lee WH, et al.A retrospective study of sintered porous-surfaced dental implants in restoring the edentulous posterior mandible: up to 9 years of functioning[J]. Implant Dent, 2010, 19(5): 409-418.
[7] das Neves FD, Fones D, Bernardes SR, et al. Short implants--an analysis of longitudinal studies[J]. Int J Oral Maxillofac Implants, 2006, 96(4): 86-93.
[8] Corrente G, Abundo R, des Ambrois AB, et al. Short porous implants in the posterior maxilla: a 3-year report of a prospective study[J]. Int J Periodontics Restorative Dent, 2009, 29(1): 23-29.
[9] Kim YK, Yun PY, Yi YJ, et al.One-year prospective study of 7 mm long implants in mandible: installation technique and crown/implant ratio of 1.5 or less[J]. J Oral Implantol, 2013, 41(2): e30-35.
[10] Hentschel A, Herrmann J, Glauche I, et al.Survival and patient satisfaction of short implants during the first 2 years of function: a retrospective cohort study with 694 implants in 416 patients[J]. Clin Oral Implants Res, 2015, 27(5): 591-596.
[11] Felice P, Pistilli R, Barausse C, et al.Short implants as an alternative to crestal sinus lift: A 1-year multicentre randomised controlled trial[J]. Eur J Oral Implantol, 2015, 8(4): 375-384.
[12] Malmstrom H, Gupta B, Ghanem A, et al.Success rate of short dental implants supporting single crowns and fixed bridges[J]. Clin Oral Implants Res, 2016, 27(9): 1093-1098.
[13] Felice P, Cannizzaro G, Barausse C, et al.Short implants versus longer implants in vertically augmented posterior mandibles: A randomised controlled trial with 5-year after loading follow-up[J]. Eur J Oral Implantol, 2014, 7(4): 359-369.
[14] Schincaglia GP, Thoma DS, Haas R, et al.Randomized controlled multicenter study comparing short dental implants (6 mm) versus longer dental implants (11-15 mm) in combination with sinus floor elevation procedures. Part 2: clinical and radiographic outcomes at 1 year of loading[J]. J Clin Periodontol, 2015, 42(11): 1042-1051.
[15] Cannizzaro G, Felice P, Leone M, et al.Immediate versus early loading of 6.5 mm-long flapless-placed single implants: a 4-year after loading report of a split-mouth randomised controlled trial[J]. Eur J Oral Implantol, 2012, 5(2): 111-121.
[16] Tawil G, Aboujaoude N, Younan R.Influence of prosthetic parameters on the survival and complication rates of short implants[J]. Int J Oral Maxillofac Implants, 2006, 21(2): 275-278.
[17] Liu JY, Pow EH, Chen ZF, et al.The mandarin Chinese shortened version of Oral Health Impact Profile for partially edentate patients with implant-supported prostheses[J]. J Oral Rehabil, 2012, 39(8): 591-599.