J Korean Assoc Oral Maxillofac Surg.  2025 Jan;51(1):26-32. 10.5125/jkaoms.2025.51.1.26.

Factors influencing proximal contact loss between fixed implant prostheses and adjacent natural teeth: a retrospective study

• Kim JH
• Yi YJ

• KMID: 2565635
• DOI: http://doi.org/10.5125/jkaoms.2025.51.1.26

Abstract

Objectives
To investigate the causal factors of proximal contact loss (PCL) between an implant prosthesis and the adjacent natural teeth using cast model analysis.
Materials and Methods
Patients who underwent restoration using dental implants in the posterior region were analyzed. To identify factors associated with PCL incidence, cast model analyses were conducted based on sex, implant site, jaw position, Angle’s classification, anterior overbite, preexisting interproximal gap between consecutive (mesial side) natural teeth adjacent to the implant, generalized gap of the full arch, and mandibular anterior crowding. Chi-square, multivariate logistic regression, and multivariate generalized estimating equation (GEE) analyses were used to evaluate the impact of each factor. The incidence of PCL over time was analyzed using Kaplan–Meier analysis.
Results
Of 653 implants, 293 implants were selected from 240 patients. Ninety implant sites (30.7%) showed PCL between the implant prostheses and the adjacent teeth. The analysis of PCL incidence revealed a gradual increase over time, with half of PCL cases occurring by 19.2 months. The chisquare test revealed significant associations between a pre-existing interproximal gap between adjacent natural teeth and a generalized overall gap in the corresponding arch and PCL (P=0.002 and P=0.027). The logistic regression (P=0.007, odds ratio [OR]: 2.684) and GEE (P=0.003, OR: 3.255) showed significant correlations between PCL and a pre-existing interproximal gap between adjacent natural teeth.
Conclusion
The occurrence of PCL between implant prostheses and adjacent teeth is influenced by the pre-existing interproximal gap between consecutive natural teeth adjacent to the implant. This factor should be carefully monitored.

Keyword

Dental implants; Tooth migration; Food impaction; Proximal ocntact loss

Figure

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  Fig. 1 Kaplan–Meier survival curve of proximal contact loss rates between fixed implant–supported prostheses and adjacent teeth.

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  Fig. 2 Kaplan–Meier cumulative incidence of proximal contact loss in implant prostheses according to the presence or absence of gaps between adjacent natural teeth.

Reference

References

1. Hancock EB, Mayo CV, Schwab RR, Wirthlin MR. 1980; Influence of interdental contacts on periodontal status. J Periodontol. 51:445–9. https://doi.org/10.1902/jop.1980.51.8.445. DOI: 10.1902/jop.1980.51.8.445. PMID: 6931204.

2. Wong AT, Wat PY, Pow EH, Leung KC. 2015; Proximal contact loss between implant-supported prostheses and adjacent natural teeth: a retrospective study. Clin Oral Implants Res. 26:e68–71. https://doi.org/10.1111/clr.12353. DOI: 10.1111/clr.12353. PMID: 25914905.

3. Koori H, Morimoto K, Tsukiyama Y, Koyano K. 2010; Statistical analysis of the diachronic loss of interproximal contact between fixed implant prostheses and adjacent teeth. Int J Prosthodont. 23:535–40.

4. Khairnar M. 2013; Classification of food impaction - revisited and its management. Indian J Dent Adv. 5:1113–9.

5. Jung JH, Oh SC, Dong JK. 2000; A clinical study on the occurrence of food impaction. J Korean Acad Prosthodont. 38:50–8.

6. Gokhale S, Padmaja K, Shah A. 2014; Food impaction after crown placements. J Adv Med Dent Sci Res. 2:162–5.

7. Newell DH, John V, Kim SJ. 2002; A technique of occlusal adjustment for food impaction in the presence of tight proximal contacts. Oper Dent. 27:95–100.

8. Shin DW, Lee JH, Kim SY, Dong JK. 2014; Clinical study on the food impaction between implant prostheses and adjacent teeth. J Korean Acad Prosthodont. 52:27–33. https://doi.org/10.4047/jkap.2014.52.1.27. DOI: 10.4047/jkap.2014.52.1.27.

9. Heij DG, Opdebeeck H, van Steenberghe D, Kokich VG, Belser U, Quirynen M. 2006; Facial development, continuous tooth eruption, and mesial drift as compromising factors for implant placement. Int J Oral Maxillofac Implants. 21:867–78.

10. Jemt T. 2005; Measurements of tooth movements in relation to single-implant restorations during 16 years: a case report. Clin Implant Dent Relat Res. 7:200–8. https://doi.org/10.1111/j.1708-8208.2005.tb00065.x. DOI: 10.1111/j.1708-8208.2005.tb00065.x. PMID: 16336911.

11. Wat PY, Wong AT, Leung KC, Pow EH. 2011; Proximal contact loss between implant-supported prostheses and adjacent natural teeth: a clinical report. J Prosthet Dent. 105:1–4. https://doi.org/10.1016/s0022-3913(10)00174-5. DOI: 10.1016/S0022-3913(10)00174-5. PMID: 21194581.

12. Thilander B, Odman J, Jemt T. 1999; Single implants in the upper incisor region and their relationship to the adjacent teeth. An 8-year follow-up study. Clin Oral Implants Res. 10:346–55. https://doi.org/10.1034/j.1600-0501.1999.100502.x. DOI: 10.1034/j.1600-0501.1999.100502.x. PMID: 10551059.

13. Byun SJ, Heo SM, Ahn SG, Chang M. 2015; Analysis of proximal contact loss between implant-supported fixed dental prostheses and adjacent teeth in relation to influential factors and effects. A cross-sectional study. Clin Oral Implants Res. 26:709–14. https://doi.org/10.1111/clr.12373. DOI: 10.1111/clr.12373. PMID: 24712313.

14. Pang NS, Suh CS, Kim KD, Park W, Jung BY. 2017; Prevalence of proximal contact loss between implant-supported fixed prostheses and adjacent natural teeth and its associated factors: a 7-year prospective study. Clin Oral Implants Res. 28:1501–8. https://doi.org/10.1111/clr.13018. DOI: 10.1111/clr.13018. PMID: 28391648.

15. Jo DW, Kwon MJ, Kim JH, Kim YK, Yi YJ. 2019; Evaluation of adjacent tooth displacement in the posterior implant restoration with proximal contact loss by superimposition of digital models. J Adv Prosthodont. 11:88–94. https://doi.org/10.4047/jap.2019.11.2.88. DOI: 10.4047/jap.2019.11.2.88. PMID: 31080569. PMCID: PMC6491362.

16. Shi JY, Zhu Y, Gu YX, Lai HC. 2019; Proximal contact alterations between implant-supported restorations and adjacent natural teeth in the posterior region: a 1-year preliminary study. Int J Oral Maxillofac Implants. 34:165–8. https://doi.org/10.11607/jomi.6870. DOI: 10.11607/jomi.6870. PMID: 30695091.

17. French D, Naito M, Linke B. 2019; Interproximal contact loss in a retrospective cross-sectional study of 4325 implants: distribution and incidence and the effect on bone loss and peri-implant soft tissue. J Prosthet Dent. 122:108–14. https://doi.org/10.1016/j.prosdent.2018.11.011. DOI: 10.1016/j.prosdent.2018.11.011. PMID: 30885585.

18. Luo Q, Ding Q, Zhang L, Peng D, Xie QF. 2016; [The loss of interproximal contact between posterior fixed implant prostheses and adjacent teeth: a retrospective study]. Zhonghua Kou Qiang Yi Xue Za Zhi. 51:15–9. Chinese. https://doi.org/10.3760/cma.j.issn.1002-0098.2016.01.005.

19. Manicone PF, De Angelis P, Rella E, Papetti L, D'Addona A. 2022; Proximal contact loss in implant-supported restorations: a systematic review and meta-analysis of prevalence. J Prosthodont. 31:201–9. https://doi.org/10.1111/jopr.13407. DOI: 10.1111/jopr.13407. PMID: 34263959.

20. Varthis S, Randi A, Tarnow DP. 2016; Prevalence of interproximal open contacts between single-implant restorations and adjacent teeth. Int J Oral Maxillofac Implants. 31:1089–92. https://doi.org/10.11607/jomi.4432. DOI: 10.11607/jomi.4432. PMID: 27632264.

21. Wei H, Tomotake Y, Nagao K, Ichikawa T. 2008; Implant prostheses and adjacent tooth migration: preliminary retrospective survey using 3-dimensional occlusal analysis. Int J Prosthodont. 21:302–4.

22. Jensen WO. 1990; Occlusion for the Class II jaw relations patient. J Prosthet Dent. 64:432–4. https://doi.org/10.1016/0022-3913(90)90039-f. DOI: 10.1016/0022-3913(90)90039-F. PMID: 2231452.

23. Braun S, Bantleon HP, Hnat WP, Freudenthaler JW, Marcotte MR, Johnson BE. 1995; A study of bite force, part 1: relationship to various physical characteristics. Angle Orthod. 65:367–72. http://doi.org/10.1043/0003-3219(1995)065%3C0367:ASOBFP%3E2.0.CO;2.

24. Choi WC, Kim TW. 2003; Relationship between maximum bite force and facial skeletal pattern. Korean J Orthod. 33:437–51.

25. Halabí D, Escobar J, Muñoz C, Uribe S. 2012; Logistic regression analysis of risk factors for the development of alveolar osteitis. J Oral Maxillofac Surg. 70:1040–4. https://doi.org/10.1016/j.joms.2011.11.024. DOI: 10.1016/j.joms.2011.11.024. PMID: 22305872.

26. Park MS, Kim SJ, Chung CY, Choi IH, Lee SH, Lee KM. 2010; Statistical consideration for bilateral cases in orthopaedic research. J Bone Joint Surg Am. 92:1732–7. https://doi.org/10.2106/jbjs.i.00724. DOI: 10.2106/JBJS.I.00724. PMID: 20660236.

27. Bryant D, Havey TC, Roberts R, Guyatt G. 2006; How many patients? How many limbs? Analysis of patients or limbs in the orthopaedic literature: a systematic review. J Bone Joint Surg Am. 88:41–5. https://doi.org/10.2106/jbjs.e.00272. DOI: 10.2106/JBJS.E.00272. PMID: 16391248.

28. Ranstam J. 2012; Repeated measurements, bilateral observations and pseudoreplicates, why does it matter? Osteoarthritis Cartilage. 20:473–5. https://doi.org/10.1016/j.joca.2012.02.011. DOI: 10.1016/j.joca.2012.02.011. PMID: 22406008.

29. Pardo MC, Alonso R. 2012; GEEs for repeated categorical responses based on generalized residuals. J Stat Comput Simul. 84:344–59. https://doi.org/10.1080/00949655.2012.709355. DOI: 10.1080/00949655.2012.709355.

30. Liang KY, Zeger SL. 1986; Longitudinal data analysis using generalized linear models. Biometrika. 73:13–22. https://doi.org/10.1093/biomet/73.1.13. DOI: 10.1093/biomet/73.1.13.