# Retrospective Study Regarding Orthodontic Retention Complications in Clinical Practice
## 5 Conclusions  
Plaque accumulation was more, and gingival recessions occurred most often in the case of patients wearing fixed inferior retainers. Oral hygiene of the group with fixed orthodontic retainers was compromised, while the hygiene of the group with mobile orthodontic retainers was better. Investigated plaque indices showed a higher score in the case of fixed retainers. Usage of the Hawley plate resulted in the highest accumulation of interdental plaque of all studied retainers. Mobile retainers are superior for maintaining oral hygiene, but the benefits of fixed retainers are not to be ignored. Flossing was the most commonly used auxiliary means for oral hygiene. Compliance of women in wearing vacuum-formed retainers is better than that of men. Patients with a class III history had more plaque accumulation, and class II/1 had the most problems related to detachment/damage of fixed retainers. Conceptualization, S.M.B. and A.V. ; methodology, S.M.B., A.B. and E.S.B. ; software, L.B.I. and D.I.C. ; validation, S.M.B. and A.V. ; formal analysis, L.B.I. ; investigation, S.M.B., E.S.B. and D.I.C. ; resources, A.B. ; data curation, L.B.I. ; writing--original draft preparation, A.B. ; writing--review and editing, E.S.B. ; visualization, S.M.B. and L.B.I. ; supervision, S.M.B. and A.V. All authors have read and agreed to the published version of the manuscript. This research received no external funding. The study was conducted according to the guidelines of the Declaration of Helsinki and approved by the Ethics Committee of SC Algocalm SRL, Targu-Mures, Romania, 899/1 February 2021. Informed Consent Statement: Informed consent was obtained from all subjects involved in the study. * [1] [PERSON] Prevalence of periodontal disease, its association with systemic diseases and prevention. _Int. J. Health Sci._**2017**, _11_, 72-80. * [2] [PERSON]; [PERSON]; [PERSON] The prevalence of periodontal disease in a Romano-British population c. 200-400 AD. _Br. Dent. J._**2014**, _217_, 459-466. [CrossRef] [PubMed]
* [3] [PERSON]; [PERSON]; [PERSON] Epidemiology of periodontal disease among older adults: A review. _Periodontology_**1998**, _16_, 16-33. [CrossRef] [PubMed]
* [4] [PERSON]; [PERSON]; [PERSON], U.K. Periodontitis: A Multifaceted Disease of Tooth-Supporting Tissues. _J. Clin. Med._**2019**, \(8\), 1135. [CrossRef] [PubMed]
* [5] [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] Evolution of Periodontal Disease: Immune Response and RANK/RANKL/OPG System. _Braz. Dent. J._**2017**, _28_, 679-687. [CrossRef]
* [6] [PERSON]; [PERSON]; [PERSON] Gingival health and relapse tendency: A prospective study of two types of lower fixed retainers. _Aust. Orthol. J._**2009**, _25_, 142-146. * [7] [PERSON]; [PERSON]; [PERSON] A 3-year follow-up study of various types of orthodontic canine-to-canine retainers. _Eur. [PERSON]_**1997**, _19_, 501-509. [CrossRef]
* [8] [PERSON]; [PERSON] Fixed Orthodontic Retainers: A Review. _[PERSON]. [PERSON]_**2019**, _32_, 110-114. [CrossRef]
* [9] [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] Isolation and characterization of biofilm-forming bacteria and associated extracellular polymeric substances from oral cavity. _Ann. Microbiol._**2013**, _63_, 1553-1562. [CrossRef]
* [10] [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] Intragenic Damage to Periodontium by Restorative Treatment Procedures: An Overview. _Open Lett. J._**2015**, \(9\), 217-222. [CrossRef]
* [11] [PERSON] Adverse effects of orthodontic treatment: A clinical perspective. _Saudi Dent. J._**2011**, _23_, 55-59. [CrossRef] [PubMed]
* [12] [PERSON]; [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] Retrospective study regarding the status of the superficial marginal periodontium in adult patients wearing orthodontic retainers. _Rom. J. Oral Rehabil._**2021**, _13_, 194-201. * [13] [PERSON]; [PERSON]; [PERSON]; [PERSON] [PERSON] Clinical evaluation of periodontal health during orthodontic treatment with fixed appliances. _Acta Med.