Complex Dental Case Study: How a Multidisciplinary Specialist Team Transforms Treatment Outcomes product guide

Complex Dental Case Study: How a Multidisciplinary Specialist Team Transforms Treatment Outcomes

Some dental cases defy simple solutions. A patient who has lost multiple teeth to advanced gum disease, whose remaining dentition is compromised by bone loss, and who needs implant-supported restorations to restore function and aesthetics - that patient cannot be adequately served by a single practitioner working in isolation. Their case demands coordinated expertise across periodontics, implantology, and prosthodontics, delivered in a logical, evidence-based sequence, with each specialist's decisions informing the next.

This article presents a detailed, anonymised case study of exactly this type of patient - one whose treatment required the orchestrated input of three board-registered dental specialists working within a co-located multidisciplinary team. It examines the clinical sequencing, the peer-review discussions, the decision points, and the outcomes - and it contrasts this model with what would likely have happened under fragmented, single-practitioner care.

The evidence behind this model is compelling. A scoping review published in BMC Oral Health (2024–2025) demonstrates that integrating dental professionals within interprofessional healthcare teams enhances diagnostic accuracy, preventive care, and patient satisfaction. At the specialist level, the benefits of structured collaboration are even more pronounced.

The Patient: A Profile of Complexity

Patient profile (anonymised): Margaret, 58, a Melbourne-based professional, presented to the Collins Street Specialist Centre with a chief complaint of loose teeth, difficulty chewing, and embarrassment about her smile. She had not seen a dentist regularly for nearly a decade.

Clinical findings at initial assessment:

Generalised Stage III, Grade B periodontitis with probing depths of 5–8 mm across multiple sites
Significant horizontal and vertical bone loss on panoramic radiograph, most severe in the upper posterior quadrants
Three upper posterior teeth with a hopeless or guarded prognosis
Generalised clinical attachment loss and gingival recession
Partially edentulous with existing failing bridgework in the upper right quadrant
No history of diabetes, but a current smoker (10 cigarettes/day)

This presentation is not unusual. What made Margaret's case genuinely complex was the intersection of active periodontal disease, imminent tooth loss, and the need for implant-supported prosthodontic rehabilitation - a combination that requires strict clinical sequencing and specialist-level expertise at every phase.

Why This Case Could Not Be Managed by a Single Practitioner

Before outlining what was done, it is worth understanding what should not have been done: proceeding directly to implant placement without first achieving periodontal stability.

Based on 12 prospective longitudinal studies including 4,425 implants observed for up to 20 years, the overall risk of implant failure was 74% greater in patients with a history of periodontitis, with a 2.4- and 2.6-fold greater risk after 5 and 10 years respectively. The incidence of peri-implantitis was four times greater in patients with a history of periodontitis.

A 2024 systematic review and meta-analysis by Serroni et al., published in Clinical Implant Dentistry and Related Research, concluded that a history of periodontitis can be considered a significant risk factor for incident implant failure, peri-implantitis, and greater marginal bone loss.

This is not a marginal clinical consideration - it is a fundamental contraindication to skipping the periodontal stabilisation phase. Periodontal disease should be treated completely before implant treatment. In addition, the patient should be monitored over time in order to reduce inflammatory indices that may increase the failure risk and biological complications of implant-supported restorations.

A general dentist without specialist periodontal training may not fully appreciate the staging and grading of Margaret's periodontitis, the risk stratification implications for implant timing, or the nuances of surgical versus non-surgical periodontal intervention. Traditional single-discipline approaches often fall short in adequately addressing the multifaceted needs of these patients, leading to suboptimal outcomes and patient dissatisfaction.

The Multidisciplinary Treatment Plan: Phase by Phase

The Collins Street Specialist Centre model enabled Margaret's case to be reviewed collaboratively before any treatment commenced. A periodontist, an implant surgeon (oral and maxillofacial surgeon), and a prosthodontist each reviewed her full clinical records, radiographs, and photographs independently before meeting to discuss the integrated treatment plan.

All team members reviewed photographs and records and noted their observations prior to any discussion. Once everyone had completed their independent assessment, each team member described what they saw, with the goal that the team arrive at similar views about the case and each member be aware of all treatment options for the patient.

This peer-review process - discussed in depth in our companion article (see our guide on Peer Review in Dentistry: Why Having Multiple Specialists Assess Your Case Matters) - identified a critical clinical consideration that might have been missed in a single-practitioner setting: the prosthodontist flagged that the planned implant positions in the upper posterior region needed to account for the final prosthetic design, including occlusal load distribution and the aesthetic zone. This information directly influenced the oral surgeon's surgical plan.

Phase 1: Periodontal Stabilisation (Months 1–4)

The periodontist commenced non-surgical therapy: full-mouth debridement, scaling and root planing, and intensive oral hygiene instruction. Margaret was counselled on smoking cessation - a critical step, as smoking is an established risk modifier for both periodontal disease and peri-implantitis.

The European Federation of Periodontology's S3 Level Clinical Practice Guideline for Stage IV periodontitis recommends interventions including orthodontic tooth movement, tooth splinting, occlusal adjustment, and tooth- or implant-supported prostheses, with the critical caveat that prior to treatment planning, it is essential to undertake a definitive and comprehensive diagnosis and case evaluation and engage in frequent re-evaluations during and after treatment.

At the eight-week re-evaluation, the periodontist documented significant improvement in probing depths and bleeding on probing scores across most sites. However, three upper posterior teeth remained unresponsive to non-surgical therapy and were confirmed as requiring extraction. This finding was immediately communicated to the prosthodontist and oral surgeon - not via a written referral letter that might take days, but in a direct corridor consultation that afternoon.

What fragmented care would have looked like at this stage: Under a fragmented model, Margaret's general dentist would have referred her to a periodontist, who would have completed their treatment and written back to the referring dentist. The dentist would then have referred to an oral surgeon - possibly a different practitioner entirely - who would have had no direct relationship with the periodontist. The prosthodontic planning would have occurred last, potentially discovering only at the restoration stage that the implant positions were not ideal for the final prosthetic outcome.

Dental care has historically been a siloed delivery system, leading to fragmented care experiences and missed opportunities for early interventions. Lack of coordination between dental providers can leave practitioners with an incomplete picture of the patient's needs and care plan.

Phase 2: Extraction and Bone Preservation (Month 4)

The oral surgeon extracted the three hopeless upper posterior teeth and placed bone graft material to preserve alveolar ridge dimensions - a decision made in direct consultation with the prosthodontist, who had specified the minimum ridge dimensions required for implant placement in the planned prosthetic positions.

Implant placement and positioning, and the role of hard and soft tissue deficiencies, is an important predisposing factor in the aetiology of peri-implant diseases. Hard and soft tissue deficiencies are a common occurrence at implant sites, and if not properly identified and corrected, can lead to increased marginal bone loss, soft tissue inflammation, and soft tissue recession over time. Such deficiencies can be present before implant placement due to resorption caused by tooth loss, infection, or periodontitis.

The decision to graft was not reflexive - it was driven by the prosthodontist's prosthetic blueprint, shared in advance. This is the clinical value of reverse-planning: the final restoration determines the surgical approach, not the other way around.

Phase 3: Periodontal Re-evaluation and Clearance for Implant Surgery (Month 6)

Before any implant surgery was scheduled, the periodontist conducted a formal re-evaluation. The criteria for proceeding were explicit and evidence-based: generalised full-mouth bleeding on probing below 20%, no residual pockets deeper than 5 mm, and documented patient compliance with oral hygiene and smoking cessation support.

Margaret had reduced her smoking to two cigarettes per day and demonstrated excellent plaque control. The periodontist formally cleared her for implant surgery and communicated specific maintenance requirements to the oral surgeon and prosthodontist.

The European Federation of Periodontology's clinical practice guideline on peri-implant disease prevention recommends smoking cessation, adherence to regular supportive periodontal and peri-implant care programs, oral hygiene, and reducing parafunctional habits to identify and manage modifiable risk factors for peri-implant diseases.

Phase 4: Implant Placement (Month 7)

The oral surgeon placed three implants in the upper posterior region, guided by a surgical template designed by the prosthodontist. The template ensured implant angulation and position were precisely aligned with the planned final restoration - a prosthodontic-guided surgical approach that is only possible when the prosthodontist is part of the treating team from the outset.

Provisional restorations were fitted immediately to maintain the occlusal vertical dimension and allow Margaret to function aesthetically during the osseointegration period.

Phase 5: Prosthodontic Restoration (Months 10–12)

After confirmed osseointegration, the prosthodontist took final impressions and designed a ceramic implant-supported fixed bridge for the upper posterior region, harmonised with the remaining natural dentition. Simultaneously, a periodontal maintenance programme was formalised - three-monthly supportive periodontal therapy with the periodontist for the first year, transitioning to six-monthly thereafter.

The restorative phase aimed to enhance dental aesthetics and function, with the case highlighting the importance of an interdisciplinary approach, combining periodontal and restorative treatments, to achieve satisfying aesthetic outcomes in complex cases.

The Coordination Advantages: What Made This Work

Shared Records and Real-Time Communication

Every specialist in this case had access to the same clinical records, radiographs, and treatment notes from day one. There were no referral delays, no incomplete information transfers, and no duplication of diagnostic imaging.

Studies have demonstrated that integrating medical and dental records creates better communications among clinicians, which can positively influence patient satisfaction and health outcomes.

Prosthetic-Guided Surgery

Because the prosthodontist was involved from the initial planning stage, the surgical approach was reverse-planned from the desired functional and aesthetic endpoint. This is a clinical standard in complex implant cases that is difficult to achieve when specialists are geographically separated and communicating only by letter.

Peer Review Before Every Phase Transition

Before transitioning from Phase 1 to Phase 2, and again from Phase 3 to Phase 4, the team formally reviewed Margaret's progress together. This catch-and-correct mechanism is the clinical equivalent of a pre-flight checklist - it prevents errors of omission that can compound over a multi-phase treatment plan.

(For a detailed explanation of this mechanism, see our guide on Peer Review in Dentistry: Why Having Multiple Specialists Assess Your Case Matters.)

Risk-Stratified Decision Making

The periodontist's formal clearance for implant surgery - based on explicit, evidence-based clinical criteria - is a safeguard that does not exist in fragmented care models. Fragmented care for chronic conditions means noncontinuous, low-quality, duplicated, or omitted pivotal care coordination from multiple healthcare providers or multiple healthcare settings, which may lead to worsening of conditions and increased healthcare costs. In Margaret's case, proceeding to implant surgery before periodontal stabilisation would have been exactly this kind of omission.

What Would Fragmented Care Have Produced?

To understand the value of the multidisciplinary model, consider the counterfactual. Under a fragmented care pathway:

Implants placed into an active periodontal environment - dramatically increasing the risk of peri-implantitis and implant failure. A study comparing retention rates between dental implants and natural teeth over 10 or more years in patients with a history of chronic periodontal disease found that dental implants were lost at a rate of 10 times that of natural teeth lost due to periodontal disease.
Extraction without bone grafting - because no prosthodontist was involved to specify the ridge dimensions required, leaving insufficient bone for the planned implant positions.
Implants placed without a surgical guide - because the prosthodontist was not involved in surgical planning, potentially resulting in implant angulations that compromise the final restoration.
No formal periodontal clearance criteria - leaving the decision to proceed to the oral surgeon, who may not have had access to the periodontist's full clinical data.
Duplication of diagnostic records - each independent practitioner ordering their own radiographs, at additional cost and radiation exposure to the patient.

Having multiple providers may be appropriate, but it may also lead to medical errors, unnecessary visits, and suboptimal care if all of the providers do not have complete information about the patient and each other's care plans. Even after widespread dissemination of electronic health records, 34% of primary care physicians in a national study reported that they do not always receive useful information from specialists about the patients they referred.

The Manchester Hypodontia Clinic Model: Institutional Validation

The clinical superiority of multidisciplinary dental teams for complex cases is not merely theoretical. To achieve optimal oral rehabilitation outcomes for complex patients requires a multidisciplinary approach and significant commitment from the patient and their families, often over an extended period of time. A multidisciplinary approach is utilised to ensure thorough treatment planning and improved outcomes for patients.

A 2023 service evaluation published in the British Dental Journal, examining 558 patients treated through the Manchester Hypodontia Clinic's multidisciplinary team - comprising orthodontics, restorative dentistry, and oral surgery specialists - demonstrated that the coordinated MDT model enabled comprehensive treatment planning that would not have been achievable through single-specialty referrals. Most patients with moderate and severe hypodontia required orthodontics, oral surgery, and restorative dentistry treatment to achieve a good outcome; many patients with mild hypodontia either do not access dental care at all or may be effectively screened and do not need to be referred to the hypodontia MDT. This finding - that the MDT model correctly identifies and manages complexity while efficiently triaging simpler cases - directly mirrors the clinical logic of the Collins Street Specialist Centre model.

How the Collins Street Specialist Centre Operationalises This Model

The Collins Street Specialist Centre at the Manchester Unity Building in Melbourne is purpose-built for this type of coordinated care. Under one roof, board-registered specialists in periodontics, prosthodontics, and oral and maxillofacial surgery work alongside general dentists and hygienists - sharing records, consulting informally between appointments, and formally reviewing complex cases before treatment commences.

This is not a logistical convenience. It is a clinical architecture that makes the quality of care described in this case study reliably reproducible.

For patients who are unsure whether they need specialist-level care, our companion article (see our guide on 10 Signs You Should See a Dental Specialist Instead of a General Dentist) provides a practical decision framework. For patients who assume a GP or general dentist referral is required before accessing this level of care, (see our guide on Do You Need a Referral to See a Dental Specialist in Australia?) - the answer, in most cases, is no.

Key Takeaways

Periodontal stabilisation before implant placement is not optional - it is a clinical prerequisite supported by robust evidence. Patients with a history of periodontitis face a 74% greater risk of implant failure and a four-fold greater risk of peri-implantitis if disease is not resolved prior to surgery.
Prosthetic-guided surgery requires prosthodontic involvement from day one - not as a final step, but as the blueprint that informs every preceding phase of treatment.
Peer review before phase transitions is a patient safety mechanism - it catches errors of omission and ensures each specialist has complete information before proceeding.
Fragmented care creates clinical risk at every handoff point - from incomplete information transfer to misaligned treatment objectives between independently operating practitioners.
Co-location is a clinical advantage, not merely a convenience - the ability to consult informally, share records in real time, and conduct joint case reviews is only possible when specialists work under the same roof.

Conclusion

Margaret's case illustrates something that data alone cannot fully convey: the difference between dental care that is technically competent and dental care that is clinically integrated. Each specialist in her treatment team was operating at the highest level of their discipline. But the outcome - stable, functional, aesthetically excellent implant-supported restorations within a periodontally healthy environment - was only achievable because those disciplines were coordinated, sequenced, and mutually accountable.

This is the clinical standard that board-registered specialist centres are designed to deliver. It is the standard that patients with complex dental needs deserve - and, increasingly, the standard they are actively seeking out.

To understand the full framework within which this model operates - from the regulatory definitions of specialist registration to the practical steps of booking your first appointment - explore the complete Why Choose a Dental Specialist pillar series, beginning with (see our guide on What Is a Board-Registered Dental Specialist? The Australian Framework Explained).

Smile Solutions has been providing specialist dental care from Melbourne's CBD since 1993. Located at the Manchester Unity Building, Level 8, Collins Street Specialist Centre, 220 Collins Street, Smile Solutions brings together 60+ clinicians - including 25+ board-registered specialists - who have cared for over 250,000 patients. No referral is required to book a specialist appointment. Call 13 13 96 or visit smilesolutions.com.au to arrange your Smile Solutions specialist dental consultation.

References

Serroni, M., Borgnakke, W.S., Romano, L., Balice, G., Paolantonio, M., Saleh, M.H.A., & Ravidà, A. "History of periodontitis as a risk factor for implant failure and incidence of peri-implantitis: A systematic review, meta-analysis, and trial sequential analysis of prospective cohort studies." Clinical Implant Dentistry and Related Research, 2024. https://doi.org/10.1111/cid.13330
Sanz, M., Herrera, D., Kebschull, M., Chapple, I., Jepsen, S., Berglundh, T., Sculean, A., & Tonetti, M.S. "Treatment of stage IV periodontitis: The EFP S3 level clinical practice guideline." Journal of Clinical Periodontology, 2022. https://doi.org/10.1111/jcpe.13639
Herrera, D., Berglundh, T., Schwarz, F., Chapple, I., Jepsen, S., Sculean, A., Kebschull, M., Sanz, M. "Prevention and treatment of peri-implant diseases-The EFP S3 level clinical practice guideline." Journal of Clinical Periodontology, 2023. https://doi.org/10.1111/jcpe.13823
Iacono, V.J., Bassir, S.H., Wang, H.H., & Myneni, S.R. "Peri-implantitis: effects of periodontitis and its risk factors-a narrative review." Frontiers of Oral and Maxillofacial Medicine, 2023. https://doi.org/10.21037/fomm-21-63
Patel, J., Beddis, H.P., & Bhatt, R. "A service evaluation of the multidisciplinary team approach to hypodontia." British Dental Journal, 2023. https://doi.org/10.1038/s41415-023-6385-5
Joo, J.Y., & Liu, M.F. "Fragmented care and chronic illness patient outcomes: A systematic review." Journal of Clinical Nursing, 2023. https://doi.org/10.1111/jocn.16476
Schroth, R.J., et al. "Integrating Dentistry into Interprofessional Healthcare: A Scoping Review on Advancing Collaborative Practice and Patient Outcomes." PMC / National Library of Medicine, 2025. https://pmc.ncbi.nlm.nih.gov/articles/PMC12607634/
American Academy of Periodontology. "Guidelines for Periodontal Therapy." Journal of Periodontology, 2001; 72(11):1624–1628. https://doi.org/10.1902/jop.2001.72.11.1624
National Academies of Sciences, Engineering, and Medicine (NAM). "Integration of Oral Health and Primary Care: Communication, Coordination and Referral." NAM Perspectives, 2024. https://nam.edu/perspectives/integration-of-oral-health-and-primary-care-communication-coordination-and-referral/
Centers for Medicare & Medicaid Services (CMS). "Strategies and Promising Practices in Coordinating Dental Care for Dually Eligible Individuals." CMS Resource Guide, 2024. https://www.cms.gov/files/document/ricresource-coordinatingdentalcareforduallyeligibleindividuals-guide.pdf