Study guide
5.5 Surgical Periodontal Therapy Overview & Maintenance Protocols
National Board Dental Hygiene Examination NBDHE
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1 Chapter 1: Head, Neck & Dental Anatomy, Histology & Embryology
1.1 Head & Neck Cranial Nerves, Osteology & Musculature 1.2 Tooth Morphology, Occlusion & Root Anatomy 1.3 Tooth Development, Histology & Embryology 1.4 Oral Physiology, Salivary Gland Function & TMJ Dynamics 1.5 General Pathology, Inflammation & Immunity Concepts
2 Chapter 2: Oral Pathology, Microbiology & Biofilm Ecology
2.1 Oral Mucosal Lesions, Soft Tissue & Salivary Pathology 2.2 Hard Tissue Anomalies, Cysts, Neoplasms & Radiographic Pathology 2.3 Periodontal Pathology, Plaque Biofilm Ecology & Microbiology 2.4 Cariology, Demineralization Mechanics & Fluoride Chemistry 2.5 Systemic Disease Manifestations & Oral Cancer Risk Factors 2.6 Genetic Conditions, Immunopathology & Diagnostic Biopsy Protocols
3 Chapter 3: Dental Pharmacology, Biochemistry & Nutrition
3.1 Autonomic Drugs, Cardiovascular & Respiratory Pharmacology 3.2 Analgesics, Opioids, NSAIDs & Central Nervous System Agents 3.3 Antimicrobial Therapy, Antibiotic Prophylaxis & Antivirals/Antifungals 3.4 Nutritional Biochemistry, Vitamins, Minerals & Dietary Analysis 3.5 Endocrine Pharmacology, Diabetic Care & Bone Metabolism Agents 3.6 Special Population Pharmacotherapeutics & Drug Interactions
4 Chapter 4: Patient Assessment, Risk Evaluation & Radiographic Interpretation
4.1 Health History Review, ASA Physical Status & Medical Risk Assessment 4.2 Comprehensive Extraoral/Intraoral Examination & Soft Tissue Inspection 4.3 Periodontal Assessment, Probing Techniques & Furcation Classification 4.4 Hard Tissue Examination, Caries Detection & Restorative Evaluation 4.5 Dental Radiography Principles, Physics, Technique & Radiation Safety 4.6 Radiographic Interpretation, Normal Landmarks & Pathologic Artifacts
5 Chapter 5: Periodontal Therapy, Instrumentation & Preventive Services
5.1 Periodontal Disease Etiology, Pathogenesis & Host Response 5.2 Non-Surgical Periodontal Therapy (NSPT) & Scaling/Root Planing (SRP) 5.3 Dental Hygiene Instrumentation, Ergonomics & Sharpness Maintenance 5.4 Preventive Oral Health Agents, Dentifrices, Rinses & Remineralization 5.5 Surgical Periodontal Therapy Overview & Maintenance Protocols 5.6 Patient Motivation, Behavioral Change & Oral Hygiene Instruction 5.7 Care Planning for Special Needs, Medically Compromised & Geriatric Patients
6 Chapter 6: Local Anesthesia Administration, Dental Materials & Special Care
6.1 Local Anesthesia Pharmacology, Neurophysiology & Vasoconstrictors 6.2 Injection Techniques, Anatomical Landmarks & Nerve Blocks 6.3 Local Anesthesia Complications, Toxicity & Nitrous Oxide Sedation 6.4 Dental Materials Chemistry, Impression Media & Restorative Auxiliaries 6.5 Pit & Fissure Sealants, Polishers & Biomaterial Biocompatibility 6.6 Orthodontic, Endodontic, Pediatric & Implant Patient Care
7 Chapter 7: Infection Prevention, OSHA/CDC Protocols & Medical Emergencies
7.1 Infection Control Principles, Transmission Pathways & Standard Precautions 7.2 Sterilization Methods, Biological Monitoring & Chemical Disinfection 7.3 OSHA Bloodborne Pathogens Standard, HazCom & Regulatory Compliance 7.4 Medical Emergency Recognition, CPR/AED & Protocol Management 7.5 Pharmacological Emergency Interventions & Airway Management 7.6 Instrument Processing Safety, Waste Management & Post-Exposure Protocols
8 Chapter 8: Community Oral Health, Epidemiology & Evidence-Based Research
8.1 Dental Public Health Principles, Community Assessment & Needs Analysis 8.2 Oral Epidemiology Indices: DMF, GI, PI, CPITN, Debris & Calculus Indices 8.3 Community Water Fluoridation Standards, Cost-Benefit & Public Health Policy 8.4 Evidence-Based Decision Making, Research Design, Control Groups & Sampling 8.5 Biostatistics in Dental Research: Mean, Median, P-values, Sensitivity & Specificity
9 Chapter 9: Integrated Case-Based Scenarios, Patient Cases & Professional Ethics
9.1 Case Scenario 1: Complex Periodontal Patient with Systemic Conditions 9.2 Case Scenario 2: Pediatric & Adolescent Preventive Management 9.3 Case Scenario 3: Medically Compromised & Special Needs Geriatric Patient 9.4 Case Scenario 4: Oral Pathology Identification & Interprofessional Referral 9.5 Professional Ethics, Jurisprudence & Dental Hygiene Practice Acts 9.6 Risk Management, Informed Consent & Interprofessional Collaboration
5.5 Surgical Periodontal Therapy Overview & Maintenance Protocols
Key Takeaways Explain This Topic AI
The primary objectives of periodontal surgery are to provide direct visual access for root debridement in deep pockets (>=6 mm), reduce pocket depths to facilitate self-care, recontour bony defects, and regenerate lost attachment apparatus.
Resective surgical techniques include Gingivectomy (excision of soft tissue pocket wall), Modified Widman Flap (access for SRP with minimal tissue removal), Apically Positioned Flap (pocket elimination), and Osseous Surgery (ostectomy removing supporting bone vs osteoplasty recontouring non-supporting bone).
Regenerative procedures utilize Guided Tissue Regeneration (GTR) with barrier membranes to exclude rapidly proliferating gingival epithelial cells, allowing slower-growing periodontal ligament cells and osteoblasts to repopulate the root surface.
Periodontal bone graft materials include Autografts (patient's own bone - gold standard), Allografts (human donor bone), Xenografts (bovine/porcine bone), and Alloplasts (synthetic materials).
Post-surgical care requires non-eugenol periodontal dressings (Coe-Pak) for wound protection, 0.12% Chlorhexidine rinses, suture removal at 7 to 14 days, and deferring mechanical brushing at the surgical site for 14 days.
Last updated: July 2026
5.5 Surgical Periodontal Therapy Overview & Maintenance Protocols
NBDHE Core Concept: Surgical periodontal therapy is indicated when non-surgical periodontal therapy (NSPT) fails to resolve deep pockets (>=6 mm), severe vertical osseous defects, or mucogingival deformities. Surgery provides direct visual access for root debridement and allows resective or regenerative recontouring of periodontal tissues.
1. Indications & Objectives of Periodontal Surgery
Periodontal surgery is an adjunctive phase of treatment performed following initial NSPT and re-evaluation.
Primary Indications
Deep Persistent Pockets (>= 6 mm): Pockets exceeding 5 mm cannot be thoroughly instrumented with hand or ultrasonic instruments due to root concavities and furcations.
Vertical (Infrabony) Osseous Defects: Bony craters and multi-walled vertical defects suitable for bone grafting or regeneration.
Furcation Involvements (Class II or III): Surgical exposure allows root resection, hemisection, or GTR.
Mucogingival Defect Correction: Inadequate attached gingiva or progressive gingival recession.
Absolute & Relative Contraindications
Uncontrolled systemic diseases (e.g., uncontrolled diabetes mellitus, recent myocardial infarction within 6 months, active leukemia).
Non-compliant patient oral hygiene (Plaque Index > 20%).
Heavy tobacco smoking (severely impairs surgical wound healing and graft survival).
2. Resective Periodontal Surgical Procedures
Resective surgery aims to reduce or eliminate deep periodontal pockets by removing or repositioning tissue margins.
Flap & Tissue Resection Classifications
Gingivectomy: The surgical excision of the unattached soft tissue pocket wall. Indicated for gingival enlargement / hyperplasia (e.g., drug-induced via phenytoin, nifedipine, or cyclosporine) or pseudopockets. Contraindication: Must NOT be performed if attached gingiva is narrow or if osseous surgery is required.
Modified Widman Flap (MWF): An internal bevel flap reflected just enough to gain direct visual access to root surfaces for SRP. The flap is repositioned in its original location, achieving primary closure with minimal tissue excision.
Apically Positioned Flap (APF): The soft tissue flap is repositioned apically toward the tooth apex to eliminate deep pockets while preserving the existing zone of attached gingiva.
Osseous Surgery: Ostectomy vs. Osteoplasty
Osseous surgery modifies alveolar bone deformities caused by periodontitis to restore physiologic bone contours.
Osseous Surgery Procedure Definition & Surgical Scope Clinical Purpose
Ostectomy (Osteoectomy) Surgical removal of SUPPORTING alveolar bone directly attached to the tooth root Removes interdental bone ledges to eliminate vertical bony defects and restore positive architecture
Osteoplasty Surgical recontouring or reshaping of NON-SUPPORTING alveolar bone Thins thick bony margins, blunts interdental craters, and smooths exostoses without removing supporting bone
3. Regenerative Periodontal Surgery & Bone Grafting
Regenerative procedures aim to restore lost periodontal tissue, forming new alveolar bone, cementum, and functional periodontal ligament fibers.
Guided Tissue Regeneration (GTR)
Biological Concept: Following surgical flap elevation, epithelial cells migrate along the root surface rapidly (0.5–1.0 mm/day), much faster than connective tissue cells or osteoblasts. If unchecked, epithelial cells form a Long Junctional Epithelium (LJE).
Mechanism: GTR places a physical barrier membrane (resorbable collagen/polylactic acid or non-resorbable ePTFE) over the osseous defect between the soft tissue flap and the tooth root. This membrane physically excludes rapidly migrating epithelial cells, creating a protected space for slower-growing PDL progenitor cells and osteoblasts to repopulate the root and reform true new attachment. [Flap Reflection] ──► [Place Barrier Membrane Over Defect] ──► Excludes Epithelial Cells
- ──► Allows PDL & Osteoblasts to Form New Attachment
- Periodontal Bone Graft Material Classifications
Bone Graft Category Source of Material Osteogenic / Inductive / Conductive Representative Examples
Autograft Bone harvested from the same individual (intraoral chin/ramus or extraoral iliac crest) Osteogenic, Osteoinductive & Osteoconductive Gold standard graft material
Allograft Bone harvested from human cadaver donors (processed via tissue banks) Osteoinductive (DFDBA) or Osteoconductive (FDBA) Demineralized Freeze-Dried Bone Allograft (DFDBA)
Xenograft Bone harvested from a different species (bovine/cow or porcine/pig) Osteoconductive ONLY (acts as a structural scaffold) Anorganic bovine bone matrix (e.g., Bio-Oss)
Alloplast Synthetic, man-made mineral materials Osteoconductive ONLY (space-maintaining matrix) Hydroxyapatite (HA), Beta-tricalcium phosphate (beta-TCP)
4. Mucogingival Surgery: FGG vs. CTG
Mucogingival procedures correct defects in the morphology, position, or amount of keratinized gingiva.
Free Gingival Graft (FGG): A full-thickness graft (epithelium + underlying connective tissue) harvested from the hard palate and sutured to a prepared recipient bed. Primary Goal: Increase the width of attached/keratinized gingiva . Resulting tissue often appears lighter and mismatching in color.
Subepithelial Connective Tissue Graft (CTG): A graft containing connective tissue ONLY harvested from under a palatal flap and covered by a flap at the recipient site. Primary Goal: Root coverage for localized gingival recession; achieves superior aesthetic color blending.
5. Post-Operative Management & Periodontal Dressings
Proper post-surgical care ensures wound stability and patient comfort.
Periodontal Dressings (Coe-Pak)
Periodontal dressings are non-eugenol pastes mixed and molded over surgical sites. They lock mechanically into interdental embrasures.
Critical Concept: Periodontal dressings do NOT contain healing agents and do NOT accelerate wound healing . They function strictly to protect the surgical wound from trauma/debris, stabilize soft tissue flaps, and improve patient comfort.
Post-Surgical Instructions
Prescribe 0.12% Chlorhexidine rinse twice daily; the patient must DEFER mechanical brushing at the surgical site for 14 days.
Suture removal is performed at 7 to 14 days post-surgery.
Avoid hot foods, hard diets, spitting, or using straws for the first 24 to 48 hours.