Crown Lengthening and Gum Lifts at Smile Solutions: Periodontal Surgery for Restorative and Aesthetic Outcomes product guide

Crown Lengthening and Gum Lifts at Smile Solutions: Specialist Periodontal Surgery for Restorative and Aesthetic Outcomes

When a tooth is too broken down, too decayed, or too buried beneath the gumline to be properly restored — or when excess gum tissue makes your smile look disproportionately "gummy" — crown lengthening surgery offers a precise, evidence-based solution. It's one of the most clinically versatile procedures in a specialist periodontist's repertoire, serving both the functional demands of restorative dentistry and the aesthetic goals of smile design. It's also one of the most technically demanding, requiring accurate diagnosis, careful surgical planning, and close collaboration between a specialist periodontist and a prosthodontist before a single incision is made.

At Smile Solutions in Melbourne's CBD, that collaboration is built into the practice model. Board-registered specialist periodontists and prosthodontists work under the same roof at our Collins Street Building home, planning crown lengthening outcomes together so the surgical result directly serves your restorative or aesthetic objective. This article explains what crown lengthening is, why it's performed, how it's done, what to expect during recovery, and why specialist-level care matters for predictable, lasting outcomes.

What is crown lengthening? A clinical definition

The American Academy of Periodontology's Glossary of Periodontal Terms defines clinical crown lengthening as a surgical procedure that aims at exposing sound tooth structure for restorative purposes via apical repositioning of the gingival tissue, with or without removal of alveolar bone.

In practical terms, the procedure exposes more of your tooth by surgically moving the gumline — and, where necessary, the underlying bone — to a lower position.

Crown lengthening is one of the most common surgical procedures in periodontal practice, with indications including subgingival caries, crown or root fractures, altered passive eruption, cervical root resorption, and short clinical abutment, with the aim of re-establishing the biologic width in a more apical position.

The procedure is performed for functional and/or aesthetic reasons. Functionally, it increases retention and resistance when placing a fabricated dental crown, provides access to subgingival caries, accesses accidental tooth perforations, and addresses external root resorption. Aesthetically, it alters gum and tooth proportions — as in the case of a gummy smile.

The two clinical indications: restorative vs. aesthetic

Restorative crown lengthening: protecting the biological width

The most medically critical indication for crown lengthening is restorative — specifically, the need to establish adequate tooth structure above the bone level before placing a crown, filling, or other restoration.

At the heart of this indication is a concept called the supracrestal tissue attachment (formerly known as the biological width).

Previously known as biologic width, supracrestal tissue attachment (STA) consists of the junctional epithelium and connective tissue attachment above the alveolar crest. On average, STA is 2.04 mm, with the junctional epithelium and connective tissue constituting 0.97 mm and 1.07 mm respectively. The STA has been observed to vary between 0.75–4.33 mm between individuals.

This zone of biological attachment must not be invaded by a dental restoration. If it is, chronic inflammation is likely to occur, causing pain, gum recession, and unpredictable loss of alveolar bone.

When the biologic width is violated, the body attempts to re-establish it through osseous resorption — a pathological process that often results in chronic inflammation, bone loss, and periodontitis.

To prevent this, your periodontist must surgically create sufficient clearance between the planned restorative margin and the alveolar bone crest. Achieving 1.5–2 mm of ferrule and 3 mm of supra-alveolar tooth structure is essential for long-term restorative success; research confirms this facilitates biologic width formation and ensures prosthesis stability.

The ferrule itself plays a critical biomechanical role. In dentistry, the ferrule effect is "a 360° collar of the crown surrounding the parallel walls of the dentin extending coronal to the shoulder of the preparation." This circumferential collar should have a height of approximately 2 mm and width of approximately 1 mm. Adequate ferrule helps resist tooth fracture by minimising stress concentration at the junction of tooth structure and the dental restoration — a particularly important consideration for endodontically treated teeth.

Common restorative indications for crown lengthening include:

• Deep subgingival caries that cannot be accessed or restored without first exposing more tooth structure
• A tooth fracture at or below the gumline
• An existing restoration whose margin encroaches on the biological width, causing chronic inflammation
• An endodontically treated tooth with insufficient coronal structure to achieve an adequate ferrule for crown placement
• Root perforation in the coronal third requiring surgical access

Aesthetic crown lengthening: correcting the "gummy smile"

The second major indication is aesthetic. A normal smile shows 1–2 mm of gingival tissue from the inferior border of the upper lip to the gingival margin of the upper central incisors. Greater than 4 mm of gingival display is aesthetically unpleasant for most patients and is known as excessive gingival display (EGD), or a gummy smile. Its prevalence ranges from 10.5% to 29% worldwide, and it's more common in women than men.

The most frequent cause of a gummy smile amenable to surgical correction is altered passive eruption (APE) — a condition where gum tissue fails to migrate apically during tooth development, leaving teeth appearing short. The prevalence of APE is approximately 12% in adults, and it can create significant aesthetic concerns due to the display of excess gingival tissue at the upper anterior teeth when smiling.

The psychosocial impact of a gummy smile is well-documented. A 2013 study in the Journal of Periodontology by Malkinson, Waldrop, Gunsolley, Lanning, and Sabatini found that excessive gingival display negatively affected how attractive a person's smile was judged to be. Perceptions of friendliness, trustworthiness, intelligence, and self-confidence were all inversely related to the amount of gingival display — and untrained laypeople were just as sensitive to these differences as senior dental students.

Not all gummy smiles have the same cause, though. The condition is multifactorial, with causes ranging from altered passive eruption and vertical maxillary excess to hyperactive lip musculature. Proper diagnosis is critical to determine the most appropriate treatment. Aesthetic crown lengthening is specifically indicated for gummy smiles caused by APE, where the anatomical crown is fully formed but obscured by excess gingival tissue and/or a bone crest positioned too far coronally. Cases driven by vertical maxillary excess may require orthognathic surgery, while those caused by a hyperactive lip may be better addressed by lip repositioning surgery, sometimes in combination with crown lengthening. Your specialists at Smile Solutions will assess your presentation and recommend the most appropriate pathway.

Presurgical assessment: what happens before your procedure

No crown lengthening procedure at Smile Solutions is undertaken without a thorough diagnostic workup. This is where the collaboration between your specialist periodontist and prosthodontist begins — and where the quality of your outcome is largely determined.

Key presurgical assessments include:

• Periodontal charting and pocket depth measurement to confirm the periodontium is healthy and free of active disease before any elective surgery is considered (see our guide on Your First Periodontist Appointment at Smile Solutions)
• Periapical radiographs to assess the position of the alveolar bone crest relative to the cementoenamel junction (CEJ) and the extent of any caries or fracture
• Bone sounding (transgingival probing under local anaesthetic) to precisely locate the bone crest and plan the extent of osseous reduction
• Crown-to-root ratio assessment to ensure that removing bone will not compromise the long-term support of your tooth
• Smile analysis and Digital Smile Design (DSD) for aesthetic cases, allowing the anticipated gingival margin to be simulated before surgery

Using cone-beam computed tomography to determine the cementoenamel junction for smile design and treatment planning brings real benefits: you and your clinician can see anticipated treatment results together and make appropriate adjustments before a single incision takes place.

Careful preoperative planning improves surgical outcomes, increases gingival margin stability after surgery, and better aligns with patient aesthetic expectations.

For restorative cases, the prosthodontist at Smile Solutions communicates the planned crown margin position to the periodontist before surgery, so the surgical endpoint is defined by the restorative requirement — not the other way around. The restoring dentist and surgeon work together to determine the amount of tooth structure to be exposed during the procedure, with all factors affecting the dentition's prognosis considered before treatment begins.

The surgical technique: step by step

The surgical technique — either via gingivectomy or apically repositioning the flaps — depends on two critical factors: the underlying crestal bone and the width of the attached gingiva.

There are three primary surgical approaches, selected based on clinical findings:

1. Gingivectomy (soft tissue only)

Used when there is an adequate band of keratinised gingiva and the bone crest is already at an appropriate level (typically ≥3 mm below the planned restorative margin), the excess gum tissue is excised and repositioned. This is the simplest approach and suits some aesthetic cases where the bone does not need to be moved.

One important caveat: if only a gingivectomy is performed in cases where the osseous crest sits at the CEJ, soft tissue rebound is likely in the future. This is precisely why correct diagnosis matters — performing a gingivectomy alone when bone recontouring is also required will result in gum tissue growing back, undermining the result.

2. Apically positioned flap with osseous resection

This is the most commonly required technique for both restorative and aesthetic crown lengthening where the bone must be repositioned. The steps are as follows:

1. Local anaesthetic is administered to ensure you are fully comfortable throughout the procedure
2. Sulcular and releasing incisions are made to create a full-thickness mucoperiosteal flap
3. The flap is reflected to expose the underlying alveolar bone
4. Osseous recontouring (osteotomy and osteoplasty) is performed using rotary instruments or piezoelectric devices to reposition the bone crest apically, creating the required 3 mm of clearance between bone and the planned restorative margin
5. The flap is repositioned apically and sutured at or just coronal to the CEJ
6. A periodontal dressing may be applied to protect the surgical site during initial healing

Ostectomy with apically positioned flap is generally more effective than gingivectomy for surgical crown lengthening. Osteoblastic activity peaks between the third and fourth week after osseous resective surgery. Soft tissue repair — including re-establishing the attached epithelium and connective tissue — begins one week postoperatively and reaches functional maturity between 6 and 9 months post-treatment.

3. Laser-assisted crown lengthening

For select cases where only soft tissue removal is required, erbium lasers offer a minimally invasive alternative. Erbium lasers can be useful in localised osseous tissue removal for establishing a new biologic width without raising a gingival flap — and in some cases, the clinician can create the biologic width for the final restoration and complete the impressions for the indirect restoration in the same appointment.

(See our guide on Laser Periodontal Treatment at Smile Solutions for a full discussion of laser applications in periodontics.)

Healing timeline: when can restorative work begin?

One of the most clinically important — and frequently misunderstood — aspects of crown lengthening is the healing timeline. Proceeding with final restorations too early risks placing margins that will end up subgingival as the gum tissue settles, compromising both the biological and aesthetic result.

It is generally accepted that 6 to 12 weeks of healing after crown lengthening are sufficient before the restoring dentist can place final restorative margins and take the final impression for functional or posterior restorations. For aesthetic or anterior cases, 3 months is the minimum healing time before impressions and final restoration. For treated areas in the aesthetic zone, a waiting period of six months is advisable where possible.

The final position of the free gingival margin can occur at three months after surgery but may take as long as six months. Several factors affect postoperative reconstitution of the biological width: gingival biotype, immediate post-suturing position of the flap, inter-individual variation of the biologic width, amount of osseous resection, post-surgical bone remodelling, and the clinical experience of the operator.

Gingival biotype is particularly relevant here. Patients with a thick tissue biotype show significantly more coronal soft tissue regrowth than patients with a thin biotype, because of natural biological differences in healing responses.

A 2024 study published in Clinical Oral Investigations (Springer Nature) confirmed that aesthetic crown lengthening produces stable gingival margin outcomes at 3, 6, and 12 months post-surgery in individuals with shortened clinical crown length due to altered passive eruption — reassuring evidence that, when performed correctly, results are designed to last.

Aesthetic outcomes: the evidence for gummy smile correction

For patients undergoing aesthetic crown lengthening for altered passive eruption, clinical outcomes are highly predictable when the procedure is performed by experienced specialists.

A case series from the Department of Periodontology and Implant Dentistry at the University of Florence–Siena (Cairo et al., PubMed 2012), which included eleven patients with a total of 58 teeth treated with flap surgery and osseous resective therapy at upper anterior natural teeth, found that at final follow-up, a significant and stable improvement of crown length was obtained compared to baseline (P < 0.0001). All patients rated outcomes as satisfactory (final VAS value = 86.6). The study concluded that periodontal plastic surgery including osseous resection leads to predictable outcomes in the treatment of altered passive eruption/gummy smile, and that careful preoperative planning avoids complications and enhances postsurgical stability of the gingival margin.

A 2019 study by Aroni, Pigossi, Pichotano, de Oliveira, and Marcantonio, published in the International Journal of Esthetic Dentistry, evaluated six female patients aged 18–22 with APE type 1B. Compared with baseline, a mean increase of 1.6 mm in tooth crown height was observed in photographic analysis at 12 months, with minimal difference between crown height immediately post-operatively and at 12 months — confirming stability of the gingival margin. The surgical protocol produced predictable outcomes and gingival margin stability one year after surgery.

Aesthetics plays a real role in self-esteem, and a gummy smile can have a meaningful negative effect on social and personal life. Surgically correcting excessive gingival exposure can improve the appearance of your smile and restore self-confidence — a genuinely life-changing outcome for many of our patients.

The interdisciplinary advantage at Smile Solutions

Crown lengthening sits at the intersection of periodontics and restorative dentistry. When performed without a clear restorative plan, the risk of a suboptimal outcome increases substantially. At Smile Solutions, the co-location of board-registered specialist periodontists and prosthodontists at our Collins Street practice means treatment planning is genuinely collaborative, from the very first consultation.

The combination of periodontal surgery and advanced restorative techniques successfully addresses patients' aesthetic concerns, achieving a balanced gingival-dental relationship and a natural, harmonious smile — demonstrating the value of an interdisciplinary approach in managing complex aesthetic challenges.

For complex aesthetic cases at Smile Solutions, digital smile design tools allow your prosthodontist to define ideal gingival zenith positions, tooth proportions, and crown lengths before surgery. Recent research confirms that marginal soft-tissue stability following crown lengthening is primarily determined by the accuracy with which the bone crest is positioned relative to the planned restorative outcome. The digitally guided approach transfers the prosthetic design directly to the surgical field, providing a reproducible reference for determining the target bone level.

This integration also matters for patients who need crown lengthening as part of a broader smile rehabilitation — for example, those requiring crown lengthening to expose sufficient tooth structure before veneers or ceramic crowns can be placed. (See our guide on Periodontics & Gum Disease Treatment at Smile Solutions Melbourne: The Complete Guide to Specialist Periodontist Care for an overview of how these treatments fit into a comprehensive care plan.)

Risks, limitations, and contraindications

Crown lengthening is a safe and well-established procedure, but there are important considerations your specialist will discuss with you before proceeding.

• The alveolar bone surrounding a tooth also surrounds adjacent teeth. Removing bone for crown lengthening will decrease the bony support available for surrounding teeth and unfavourably increase the crown-to-root ratio. Once alveolar bone is removed, it is almost impossible to restore it to previous levels.

• Crown lengthening can result in loss of the interdental papilla, causing poor soft tissue aesthetics known as "black triangles." Some patients also develop significant sensitivity because of exposed dentine.

• Reduced bone volume in an area where crown lengthening has been completed may compromise future implant placement. It's worth discussing all treatment options thoroughly with your dentist before undergoing an irreversible procedure.

• If your gummy smile is caused by vertical maxillary excess rather than altered passive eruption, crown lengthening alone will not resolve the underlying skeletal issue, and a surgical referral may be required.

• Active periodontal disease must be fully treated and stabilised before elective crown lengthening is performed. (See our guides on Non-Surgical Gum Disease Treatment at Smile Solutions and Periodontal Surgery at Smile Solutions for the treatment pathway that precedes elective surgery.)

Your specialist at Smile Solutions will walk you through all of these considerations, ensuring you have a clear and complete picture of your personalised treatment plan before any decisions are made.

Key takeaways

• Crown lengthening has two distinct clinical indications: restorative (exposing sufficient tooth structure to establish biological width, ferrule, and sound restorative margins) and aesthetic (correcting a gummy smile caused by altered passive eruption). The diagnosis determines the technique.
• The supracrestal tissue attachment averages 2.04 mm and must not be invaded by any dental restoration. Crown lengthening surgically repositions the gumline and bone to create the necessary clearance, with evidence supporting at least 3 mm of supra-alveolar tooth structure for long-term restorative success.
• Gummy smiles affect approximately 10.5–29% of the population, with altered passive eruption the most common surgically correctable cause. Peer-reviewed evidence confirms that aesthetic crown lengthening with osseous resection produces stable, predictable results at 12 months.
• Healing timelines are non-negotiable: 6–12 weeks is the minimum before restorative impressions in posterior areas; 3–6 months is required in the aesthetic zone before final prosthetic work begins. Proceeding too early risks gingival rebound and a compromised restorative margin.
• Interdisciplinary planning between a specialist periodontist and prosthodontist — as practised at Smile Solutions — is the gold standard for crown lengthening, ensuring the surgical endpoint is defined by the restorative and aesthetic objective before the procedure begins.

Conclusion

Crown lengthening and gum lift surgery are among the most clinically consequential procedures bridging periodontics and restorative dentistry. Whether your goal is to save a heavily broken-down tooth by exposing enough structure for a crown, or to transform your smile by correcting disproportionate gum display, the underlying principles remain the same: precise diagnosis, careful surgical planning, respect for the biological width, and an appropriate healing interval before definitive restorative work begins.

At Smile Solutions, you benefit from having Dental Board of Australia–registered specialist periodontists performing these procedures with direct, on-site collaboration from prosthodontists — a combination that is rare outside a major multidisciplinary practice and one that materially improves the predictability of your outcomes. If you are considering crown lengthening for restorative or aesthetic reasons, or if your general dentist has recommended the procedure, we encourage you to explore our related guides on [Periodontal Surgery at Smile Solutions], [Your First Periodontist Appointment at Smile Solutions], and [Why Choose Smile Solutions for Periodontal Treatment] to understand the full scope of specialist care available to you.

Book your specialist periodontal consultation today — no referral required.

Smile Solutions has been providing specialist periodontal care from Melbourne's CBD since 1993. Located at Collins Street Building, Level 12 and Tower, 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 specialist periodontal consultation.

References

• Gargiulo, A.W., Wentz, F.M., and Orban, B. "Dimensions and Relations of the Dentogingival Junction in Humans." Journal of Periodontology, 1961; 32:261–267.
• Vacek, J.S., Gher, M.E., Assad, D.A., Richardson, A.C., and Giambarresi, L.I. "The Dimensions of the Human Dentogingival Junction." International Journal of Periodontics and Restorative Dentistry, 1994; 14:154–165.
• Malkinson, S., Waldrop, T.C., Gunsolley, J.C., Lanning, S.K., and Sabatini, R. "The Effect of Esthetic Crown Lengthening on Perceptions of a Patient's Attractiveness, Friendliness, Trustworthiness, Intelligence, and Self-Confidence." Journal of Periodontology, 2013; 84(8):1126–1133. https://pubmed.ncbi.nlm.nih.gov/23137007/
• Cairo, F. et al. "Periodontal Plastic Surgery to Improve Aesthetics in Patients with Altered Passive Eruption/Gummy Smile: A Case Series Study." PubMed Central / PMC, 2012. https://pmc.ncbi.nlm.nih.gov/articles/PMC3465986/
• Aroni, M.A.T., Pigossi, S.C., Pichotano, E.C., de Oliveira, G.J.P.L., and Marcantonio, R.A.C. "Esthetic Crown Lengthening in the Treatment of Gummy Smile." International Journal of Esthetic Dentistry, 2019; 14(4):370–382. https://pubmed.ncbi.nlm.nih.gov/31549103/
• Deas, D.E., Moritz, A.J., McDonnell, H.T., Powell, C.A., and Mealey, B.L. "Osseous Surgery for Crown Lengthening: A 6-Month Clinical Study." Journal of Periodontology, 2004; 75:1288–1294.
• Goel, A., Mott, D.A., Wilkerson, C., and Ellzey, A.T. "Insights Into Healing Phases and Tissue Adaptations of Crown Lengthening." Decisions in Dentistry, January 2024. https://decisionsindentistry.com/2024/01/insights-into-healing-phases-and-tissue-adaptations-of-crown-lengthening/
• Qali, et al. "Clinical Considerations for Crown Lengthening: A Comprehensive Review." Cureus, November 2024; 16(11):e72934. https://www.researchgate.net/publication/385509224
• Nguyen Thai Cong, Pham Hoai Nam, Hoang Viet, and Anand Marya. "Digitally Planned Surgical Crown Lengthening: A Novel Bone Reduction Strategy to Correct a Gummy Smile." Journal of Surgical Case Reports, April 2024. https://doi.org/10.1093/jscr/rjae202
• Systematic Review: "Periodontal Tissue Changes After Crown Lengthening Surgery: A Systematic Review and Meta-Analysis." PMC / NIH, 2023. https://pmc.ncbi.nlm.nih.gov/articles/PMC10213835/
• Lanning, S.K., Waldrop, T.C., Gunsolley, J.C., and Maynard, J.G. "Surgical Crown Lengthening: Evaluation of the Biological Width." Journal of Periodontology, 2003; 74:468–474.
• American Academy of Periodontology. Glossary of Periodontal Terms, 5th Edition. Chicago: AAP, 2001.

Frequently Asked Questions

What is crown lengthening: A surgical procedure that exposes more tooth structure by repositioning the gumline

Does crown lengthening involve removing gum tissue: Yes, gum tissue is surgically repositioned or removed

Does crown lengthening involve removing bone: Yes, in most cases underlying alveolar bone is also reshaped

What are the two main reasons for crown lengthening: Restorative purposes and aesthetic purposes

Is crown lengthening used to fix a gummy smile: Yes

Is crown lengthening used to help place a dental crown: Yes

What is the biological width: The zone of soft tissue attachment between gum and bone surrounding a tooth

What is the modern term for biological width: Supracrestal tissue attachment (STA)

What is the average measurement of supracrestal tissue attachment: 2.04 mm

Can the supracrestal tissue attachment vary between individuals: Yes, ranging from 0.75 to 4.33 mm

What happens if a dental restoration invades the biological width: Chronic inflammation, pain, gum recession, and bone loss

Why must the biological width be respected during crown placement: To prevent chronic inflammation and bone loss

What is the ferrule effect in dentistry: A 360-degree collar of crown material surrounding parallel walls of dentin

What is the recommended ferrule height: Approximately 2 mm

What is the recommended ferrule width: Approximately 1 mm

How much supra-alveolar tooth structure is needed for long-term restorative success: At least 3 mm

Does adequate ferrule help prevent: Tooth fracture, especially in endodontically treated teeth

What is altered passive eruption: A condition where gum tissue fails to migrate apically, leaving teeth appearing short

Is altered passive eruption a common cause of gummy smiles: Yes, it is the most common surgically correctable cause

What percentage of the population has altered passive eruption: Approximately 12%

What is excessive gingival display: More than 4 mm of gum visible when smiling

What percentage of people worldwide have a gummy smile: Between 10.5% and 29%

Is a gummy smile more common in women or men: More common in women

Does a gummy smile affect how others perceive you: Yes, it negatively affects perceptions of attractiveness and confidence

Did research confirm laypeople notice gummy smiles: Yes, untrained laypeople were as sensitive as dental students

Can crown lengthening fix all types of gummy smiles: No, only those caused by altered passive eruption

What causes gummy smiles that crown lengthening cannot fix: Vertical maxillary excess or hyperactive lip musculature

What treatment may be needed for vertical maxillary excess: Orthognathic surgery

What treatment may be needed for a hyperactive lip: Lip repositioning surgery

What are common restorative indications for crown lengthening: Deep decay, tooth fracture at gumline, insufficient ferrule, root perforation

What diagnostic imaging is used before crown lengthening: Periapical radiographs

What is bone sounding: Transgingival probing under local anaesthetic to locate the bone crest

Is Digital Smile Design used at Smile Solutions for crown lengthening planning: Yes

Can cone-beam CT be used in crown lengthening planning: Yes, to determine the cementoenamel junction position

Who performs crown lengthening at Smile Solutions: Board-registered specialist periodontists

Do prosthodontists collaborate in crown lengthening planning at Smile Solutions: Yes, on-site collaboration is built into the practice model

Where is Smile Solutions located: Collins Street Building, 220 Collins Street, Melbourne CBD

How many clinicians work at Smile Solutions: Over 60

How many board-registered specialists work at Smile Solutions: Over 25

Do you need a referral to see a specialist at Smile Solutions: No referral required

What is the phone number for Smile Solutions: 13 13 96

What are the three surgical techniques for crown lengthening: Gingivectomy, apically positioned flap with osseous resection, and laser-assisted

When is gingivectomy alone appropriate: When bone is already at the correct level and adequate keratinised gingiva exists

What happens if gingivectomy is performed when bone also needs repositioning: Gum tissue will grow back, undermining the result

What is the most commonly required crown lengthening technique: Apically positioned flap with osseous resection

What type of anaesthetic is used during crown lengthening: Local anaesthetic

What is applied after surgery to protect the site: A periodontal dressing

When does osteoblastic activity peak after osseous surgery: Between the third and fourth week

When does soft tissue repair reach functional maturity after crown lengthening: Between 6 and 9 months post-treatment

What is the minimum healing time before restorative impressions in posterior areas: 6 to 12 weeks

What is the minimum healing time before final restorations in the aesthetic zone: 3 months

What is the recommended waiting period for aesthetic zone impressions for best results: 6 months

What happens if restorations are placed too early after crown lengthening: Gum tissue may rebound, leaving margins subgingival

Does gingival biotype affect healing after crown lengthening: Yes

Which biotype shows more soft tissue regrowth after crown lengthening: Thick biotype

Is gingival margin stability achievable after aesthetic crown lengthening: Yes, studies confirm stability at 3, 6, and 12 months post-surgery

What patient satisfaction score was reported in the Cairo et al. 2012 study: VAS value of 86.6 out of 100

How much crown height increase was observed in the Aroni et al. 2019 study: 1.6 mm at 12 months

Was gingival margin stability confirmed at 12 months in the Aroni study: Yes

Can crown lengthening reduce bone support for adjacent teeth: Yes, bone removal affects surrounding teeth

Can crown lengthening cause tooth sensitivity: Yes, exposed dentine can cause sensitivity

Can crown lengthening cause loss of the interdental papilla: Yes, resulting in black triangles

Is bone removed during crown lengthening restorable: No, removed alveolar bone is almost impossible to restore

Can crown lengthening affect future implant placement: Yes, reduced bone may compromise implant options

Should active gum disease be treated before crown lengthening: Yes, it must be fully stabilised first

Is crown lengthening reversible: No, it is an irreversible procedure

Are erbium lasers used in crown lengthening: Yes, for select soft tissue and localised osseous cases

What is one advantage of laser-assisted crown lengthening: Final impressions can sometimes be taken in the same appointment

How long has Smile Solutions been providing specialist periodontal care: Since 1993

How many patients has Smile Solutions treated: Over 250,000