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Periodontal therapy for localized severe periodontitis in a patient receiving fixed orthodontic treatment: a case report

Abstract

Background

Orthodontic treatment involves movement of teeth by compression and resorption of the alveolar bone using orthodontic forces. These movements are closely linked to the interactions between the teeth and the periodontal tissues that support them. Owing to an increase in adults seeking orthodontic treatment, orthodontists increasingly encounter patients with periodontal diseases, in whom orthodontic treatment is contraindicated. In rare cases, periodontitis may develop after treatment initiation. However, no approach for treating periodontitis after the initiation of orthodontic treatment has been established. Here, we present an approach for managing localized severe periodontitis manifesting after initiating orthodontic treatment.

Case presentation

A 32-year-old Japanese woman was referred to the Department of Dentistry and Oral Surgery by an orthodontist who observed symptoms of acute periodontitis in the maxillary molars that required periodontal examination and treatment. A detailed periodontal examination, including oral bacteriological examination, revealed localized severe periodontitis (stage III, grade B) in the maxillary left first and second molars and in the mandibular right second molar. After consultation with the orthodontist, the orthodontic treatment was suspended based on the results of the bacteriological examination to allow for periodontal treatment. Full-mouth disinfection was performed with adjunctive oral sitafloxacin. Periodontal and bacteriological examinations after treatment revealed regression of the localized periodontitis with bone regeneration. Thereafter, orthodontic treatment was resumed, and good progress was achieved.

Conclusions

Orthodontists should recognize the risk of acute severe periodontitis in young adults. Asymptomatic patients with localized severe periodontitis may clear a screening test before orthodontic treatment but develop acute symptoms with bone resorption during orthodontic treatment. Therefore, patients requiring orthodontic treatment should be examined by their family dentist or a periodontist to rule out periodontal issues that may impede orthodontic treatment. The patients should also be informed of age-related risks. Further, periodontists, family dentists, and orthodontists who treat adults should be informed about periodontitis and the need for interdisciplinary collaboration. In patients who develop periodontitis after orthodontic treatment initiation, temporary interruption of orthodontic treatment and aggressive periodontal intervention may facilitate recovery.

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Background

The objective of orthodontic treatment is to provide a functional and cosmetic dental occlusion through optimal movements of the teeth. These movements are closely linked to interactions between the teeth and the periodontal tissues that support them. As the number of adult patients seeking orthodontic treatment has increased in recent years, orthodontists are increasingly encountering individuals with periodontal disease. If periodontal inflammation is not controlled during orthodontic treatment, periodontal damage can progress rapidly, leading to additional attachment loss [1]. However, an approach for treating periodontitis after the initiation of orthodontic treatment has not yet been established.

The concept of single-stage full-mouth disinfection (FMD), proposed > 25 years ago [2], has been advocated for its therapeutic and microbiological benefits [3, 4]. It is based on the discovery that periodontal bacteria from untreated periodontal pockets and oral niches rapidly recolonize newly treated periodontal pockets [5].

To achieve optimal treatment outcomes in modern clinical practice, interdisciplinary treatment should be performed by orthodontists, periodontists, and general dentists. We report a case of successful collaboration between a periodontist and orthodontist to treat localized stage III periodontitis that manifested after initiation of orthodontic treatment by applying FMD combined with systemic antimicrobial therapy.

Case presentation

A 32-year-old Japanese woman was referred to our department due to complaints of spontaneous gingival pain, bleeding, and increased tooth mobility of the maxillary left second molar. The patient had already started orthodontic treatment at the time of referral; she had acute seizure symptoms during orthodontic treatment and was receiving antimicrobial medications at the time of presentation. According to the referring orthodontist, the patient had been screened by her family dentist (general practitioner) for caries and periodontal disease before orthodontic treatment, and orthodontic treatment was initiated based on the results of the screening. The patient had been experiencing gingival inflammation since the initiation of the orthodontic treatment, and emergency treatment had been provided in collaboration with her family dentist. However, the patient’s symptoms of pain, gingival swelling, and tooth mobility worsened, and her family dentist suggested the need for specialized diagnosis and treatment by the orthodontist, who in turn referred the patient.

Investigations

To make a diagnosis and develop a treatment plan, we performed oral and periodontal examinations. Periodontal damage was diagnosed based on probing pocket depth (PPD) measurements at six sites around each tooth and evaluations of the teeth and soft tissues (Fig. 1). Intraoral periapical radiographs revealed extensive alveolar bone loss (Fig. 2), including vertical bone resorption extending from the distal aspect of the maxillary left first molar to the mesial aspect of the maxillary left second molar. Vertical bone loss was also observed distal to the mandibular right second molar (Fig. 2, white arrow). Clinically, deep periodontal pockets (PPD, 4–7 mm) were detected around the bilateral maxillary first and second molars and bilateral mandibular second molars. The inflamed periodontium had a surface area of 277.4 mm2 [6, 7]. Based on the initial periodontal findings, severe localized stage III grade B periodontitis in the maxillary left first and second molars and in the mandibular right second molar was diagnosed [7]. As the patient had good general health and only localized clinical attachment loss, we suspected localized aggressive periodontitis (1999 International Workshop for a Classification of Periodontal Disease and Conditions) in relation to the maxillary left first and second molars and the mandibular right second molar [8].

Fig. 1
figure 1

Clinical appearance before treatment. No significant gingival redness or swelling can be observed

Fig. 2
figure 2

Intraoral periapical radiographs. White arrows indicate vertical bone loss

We conducted bacteriological examinations to observe the bacterial flora before and after treatment. Bacterial specimens were collected using paper points from periodontal pockets around the maxillary left second molar, the site of acute periodontal disease, and the distal side of the mandibular right second molar with vertical bone loss on dental radiographs. Saliva specimens were also collected, and real-time polymerase chain reaction analysis (Perio-Analysis; NOVEO, Hong Kong, China) was conducted (Table 1). The pretreatment bacteriological examination showed that the counts of Porphyromonas gingivalis, Tannerella forsythia, and Treponema denticola (red complex) as well as those of Prevotella intermedia, Parvimonas micra, and Fusobacterium nucleatum (orange complex) at the maxillary left second molar were > tenfold higher than the tolerated values. At the mandibular right second molar, the counts of T. forsythia, T. denticola, P. intermedia, P. micra, and Campylobacter rectus were > tenfold higher than the tolerable values. Similarly, in the saliva samples, the counts of T. forsythia, T. denticola, P. micra, F. nucleatum, C. rectus, and Eikenella corrodens were ten times higher than the permissible values (Table 1).

Table 1 Real-time polymerase chain reaction evaluation of periodontal pathogenic load at the first visit

Treatment

To eliminate the etiology of the periodontal disease, the orthodontist treating the patient was consulted and all orthodontic treatments were suspended. The orthodontic appliance was removed from the upper and lower molars in the affected area. FMD was performed within 24 hours of debridement of all periodontal pockets by scaling and root planing (SRP) using Gracey curettes, followed by adjunctive oral sitafloxacin (100 mg/day for 7 days). The patient was educated on the Bass technique for toothbrushing and interdental brushing techniques, and detailed oral hygiene instructions were given to ensure a significant reduction in bacterial load. Plaque was also found around the brackets; therefore, we educated the patient to identify sites of plaque accumulation and instructed her on how to carefully remove it.

Outcome and follow-up

At 3 months after FMD, we observed no recurrence of periodontal disease (Fig. 3). Post-treatment radiographs revealed that there was no advancement in alveolar bone resorption since the initial examination or in alveolar bone deposition around the maxillary left second molar and the mandibular right second molar (Fig. 4, white arrows).

Fig. 3
figure 3

Intraoral clinical images after periodontal therapy. Signs of inflammation are absent

Fig. 4
figure 4

Intraoral periapical radiographs after periodontal treatment. No evidence of bone resorption progression is observed. Alveolar bone deposition can be observed on the distal aspects of the maxillary left second molar and mandibular right second molar (white arrows), thus, indicating that bone grafting is not required

The O’Leary plaque control scores were improved from 49% to 22%, bleeding on probing decreased from 24 (16.7%) to 21 sites (14.6%), the average PPD was improved from 2.4 to 2.1 mm, and periodontal inflammatory surface area decreased from 277.4 to 125.6 mm2. The patient is currently receiving supportive periodontal therapy, and her condition is stable without recurrence of periodontal disease. Orthodontic treatment was put on hold for 3 months during the primary periodontal treatment phase; however, it was resumed at the same time as was the supportive periodontal therapy.

The counts of P. intermedia and C. rectus in the saliva samples were only ten times higher than the reference value, which was one of the reasons for periodontal disease management with supportive periodontal therapy. The red complex was no longer detected in the periodontal pockets that showed severe disease before treatment, and the orange-complex counts decreased below the standard value. However, in the saliva samples, T. denticola was detected, and the orange-complex counts, especially the P. intermedia count, were approximately 100 times higher than the reference values (Table 2).

Table 2 Real-time polymerase chain reaction evaluation of periodontal pathogenic load after periodontal treatment

Currently, the patient has resumed orthodontic treatment, which is progressing well with no evidence of recurrence of periodontal disease.

Discussion and conclusions

We encountered a case of localized periodontitis (stage III, grade B) during orthodontic treatment. The current case presents two significant considerations for clinicians. First, localized stage III periodontitis, which may be missed during initial examination, can become exacerbated during orthodontic treatment. Exacerbation may require temporary interruption of orthodontic treatment to allow resolution of active periodontitis through periodontal intervention. Second, patients who have undergone periodontal treatment should be carefully examined by a periodontist during orthodontic treatment. Orthodontists should monitor the periodontal tissue carefully during orthodontic treatment and collaborate with periodontists as and when necessary.

Pre-orthodontic oral examination is often performed by general dentists, and not all cases are evaluated by periodontists using periapical radiographs (the Dental X-P 10 or 14 card method) to thoroughly assess the bone levels. Panoramic radiography and basic periodontal examination before proceeding with orthodontic treatment are probably more common if the patient has no relevant complaints. However, as it is uncommon for a dentist to have expertise in both orthodontics and periodontics, localized periodontitis that may not require periodontal surgery, such as in this case, may be overlooked before orthodontic treatment.

Fixed orthodontic treatment has minimal to no significant effects on the clinical attachment levels (periodontal conditions) in healthy adults and adolescents [9, 10]. However, in cases of localized moderate periodontitis with no obvious symptoms, as in the present case, orthodontic treatment may induce acute symptoms and bone resorption. If periodontal inflammation is not controlled during orthodontic treatment, periodontal damage can progress rapidly, leading to additional attachment loss [1]. In the worst-case scenario, the orthodontic treatment may have to be interrupted. However, it is possible to recover from such a situation with accurate diagnosis and professional treatment.

We performed a thorough clinical and radiographic evaluation of individual teeth in addition to bacteriological examination of the sites with deep periodontal pockets. The World Workshop in Periodontology (1999) defined aggressive periodontitis as “a type of periodontitis that typically affects young people with a non-contributory medical history and familial aggregation, resulting in rapid attachment loss and bone resorption” [8]. According to the consensus report from the International Workshop on the Classification of Periodontal Diseases and Conditions, an increase in the prevalence of Porphyromonas gingivalis and Aggregatibacter actinomycetemcomitans in some populations is a potential secondary feature of localized and generalized aggressive periodontitis [11]. As some periodontal bacteria with high pathogenicity contribute to the development of aggressive periodontitis [12] and affect its prognosis, we performed bacteriological examination. Treponema denticola has been increasingly detected in patients with aggressive periodontitis [13], and according to the 1999 American Association of Periodontology classification of periodontitis [8], continued supportive periodontal therapy after orthodontic treatment is necessary to prevent recurrence of periodontal disease.

In the present case, we aimed to complete periodontal treatment and resume orthodontic treatment as soon as possible. We administered systemic antibiotic therapy along with FMD to effectively treat severe generalized periodontitis within a short period [14]. We selected FMD for the following reasons: (a) real-time polymerase chain reaction showed that the counts of periodontitis-related pathogenic bacteria in the maxillary left second molar area, mandibular right second molar area, and saliva were > ten times higher than the reference value; (b) to minimize the risk of reinfection from the SRP-treated sites to untreated sites; (c) to achieve timely completion of periodontal treatment and to resume orthodontic treatment as soon as possible; and (d) to prevent or minimize bacteremia and a rise in body temperature, which are possible adverse complications of FMD [15, 16]. To achieve these objectives, periodontal disease elimination therapy was performed at sites with PPD ≥ 4 mm, which were confined to the molars. In accordance with the original protocol, FMD was completed within 24 hours [2, 15, 17]. Oral sitafloxacin, which is effective against periodontitis-related pathogenic bacteria, was administered as an adjunctive therapy [18].

FMD minimizes the risk of reinfection from untreated periodontal pockets. Its clinical effects have been extensively researched [4, 19,20,21]; however, the synergistic effect of antibiotic or chlorhexidine treatment with FMD is debatable. The combination of chlorhexidine treatment with FMD demonstrated clinical outcomes that are superior to those of SRP per quadrant in several trials [22,23,24]; in other trials, the effects of FMD with or without antiseptics are comparable to those of standard SRP [25,26,27]. The use of 0.2% and 1% chlorhexidine is banned in Japan, preventing its use in the present case. In Japan, as cases of anaphylactic shock due to chlorhexidine gluconate have been reported, the concentration of undiluted chlorhexidine gluconate is regulated up to 0.05%. In practice, chlorhexidine gluconate is often applied at a concentration of approximately 0.01% because it is diluted for use. When bacterial factors are suspected to be more strongly associated with periodontal disease than host or environmental factors, the treatment should include FMD and adjunctive antimicrobial therapy with a limited dosage and duration of treatment. Full-mouth SRP has severe systemic effects, such as fever and a transient increase in the inflammatory cytokine levels [16]. The concomitant use of antimicrobial agents can significantly reduce bacteremia caused by SRP [28]. The combined amoxicillin and metronidazole administration is the most frequently used antimicrobial treatment during FMD [29, 30]. An earlier meta-analysis reported that the use of a combination of amoxicillin and metronidazole as an adjuvant to SRP presented therapeutic effects [31]. However, metronidazole is not indicated in Japan for infections in the oral cavity. Thus, in the present case, sitafloxacin was used, and we observed a significant post-treatment decrease in red-complex bacteria in active periodontal pockets [32, 33].

The risk of development of resistant strains due to the misuse of antimicrobial drugs must be recognized. To reduce the emergence of antibiotic-resistant strains and adverse effects, we chose a 7-day antibiotic regimen. In previous investigations on antibiotic resistance, researchers discovered that a single course of systemic antibiotics combined with mechanical debridement resulted in transitory bacterial resistance that dissipated shortly after the treatment was stopped [34, 35]. In the present study, the initial bacteriological examination had shown significant numbers of red and orange complexes. Therefore, we used sitafloxacin to eradicate these bacterial complexes and prevent bacteremia and febrile reactions, which are side effects of FMD. However, in cases where the bacterial levels are not significantly high, conventional SRP may be adequate.

Localized stage III periodontitis overlooked during screening of the patient can manifest with acute symptoms during orthodontic treatment. Our report presents two important clinical considerations in this regard. First, as orthodontic treatment often involves extraction procedures and treatment interruption is not possible in principle, orthodontists should consider a thorough periodontal diagnosis by the patient’s family dentist or a periodontist before orthodontic treatment, and general dentists should consider the possibility that their patients may be candidates for orthodontic treatment. Orthodontists should be informed on periodontitis; particularly, orthodontists treating adults must be knowledgeable regarding the management of localized severe periodontitis through interdisciplinary collaboration with periodontists. Second, if periodontitis or local acute inflammation occurs during orthodontic treatment, temporary interruption of treatment followed by diagnosis and treatment by a collaborating periodontist may facilitate recovery. In the present case, the periodontal parameters were improved, alveolar bone resorption stabilized following basic periodontal treatment with FMD and oral sitafloxacin, and the patient resumed orthodontic treatment. This case of localized periodontitis manifesting during orthodontic treatment may be rare; however, with the increase in the number of adults seeking orthodontic treatment, such cases are expected to be more common. In the future, it is desirable to establish clinical and bacteriological evaluation techniques that can be used by orthodontists, periodontists, and general dentists together.

Availability of data and materials

All data generated or analyzed during this study are included in the published article.

Abbreviations

FMD:

Full-mouth disinfection

PPD:

Probing pocket depths

SRP:

Scaling and root planning

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Acknowledgements

We would like to thank Editage (www.editage.com) for English language editing.

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SM performed periodontal treatment, collected and evaluated the data, and drafted the manuscript. KW revised the manuscript and provided orthodontic and periodontal therapy recommendations. RO performed orthodontic treatment and clinical follow-up. TN and SA wrote, critically reviewed, and edited the manuscript. All authors read and approved the final manuscript.

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Correspondence to Satoru Morikawa.

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Morikawa, S., Watanabe, K., Otsuka, R. et al. Periodontal therapy for localized severe periodontitis in a patient receiving fixed orthodontic treatment: a case report. J Med Case Reports 17, 19 (2023). https://doi.org/10.1186/s13256-023-03751-1

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Keywords

  • Orthodontic treatment
  • Periodontal examination
  • Severe periodontitis
  • Case report