The hard truth? \u201cThe patient looks overclosed\u201d is not a diagnosis.<\/p>\n\n\n\n
A 2025 joint consensus statement on worn dentitions<\/a> supported individualized, minimally invasive planning with direct or indirect restorations selected according to tooth-substance loss and treatment goals; it also found the evidence for a mandatory evaluation phase inconclusive.<\/p>\n\n\n\n Facial photographs, lip mobility, repose display, full-smile display, profile, lower facial proportions, and tooth visibility during speech all matter. But none of them should be allowed to act as a single decisive measurement. A 2012 University of Western Australia review noted that proposed methods for quantifying OVD loss lack consistency and reliability, and recommended that the increase be driven by restorative needs and esthetic demands rather than by one supposedly definitive measurement. <\/p>\n\n\n\n Full-mouth esthetic rehabilitation becomes dangerous when the team treats the starting bite as an inconvenience instead of evidence.<\/p>\n\n\n\n Before adjusting occlusal vertical dimension, document:<\/p>\n\n\n\n No shortcuts here.<\/p>\n\n\n\n A patient with active temporomandibular pain, limited opening, or unstable mandibular positioning should not be moved irreversibly because a digital smile design looks better at a new height. The same 2012 review recommended removable management first for patients with TMD-associated symptoms before irreversible treatment is considered.<\/p>\n\n\n\n And there is another trap: deep bite and edge-to-edge cases often tempt teams to \u201csolve\u201d the occlusion with thin anterior ceramics. That is backwards. The site\u2019s guide on veneer planning in deep-bite and edge-to-edge cases<\/a> explains why anterior guidance, parafunction, enamel support, and restorative space must be diagnosed before veneers are prescribed.<\/p>\n\n\n\n I do not believe in a universal safe number.<\/p>\n\n\n\n A frequently cited review states that the smallest practical increase should be used, while an increase up to 5 mm may be justified when restorative space and anterior esthetics require it. That is not permission to open every case by 5 mm. It is a boundary from a review, not a treatment recipe.<\/p>\n\n\n\n More important, millimeters must be tied to a reference point. \u201cIncrease OVD by 3 mm\u201d is incomplete unless the prescription states where that 3 mm is measured: incisal pin, central incisor region, canine region, or posterior segment. Mandibular rotation means the same opening will not produce identical separation at every tooth.<\/p>\n\n\n\n The clinical target should be the smallest increase that permits:<\/p>\n\n\n\n A 2024 BMC Oral Health case report from Zhejiang University followed a 30-year-old patient with hypoplastic amelogenesis imperfecta for 52 months after full-mouth lithium disilicate rehabilitation at an increased OVD. The authors described satisfactory performance and discussed a 2\u20134 mm increase as a predictable range for that specific clinical context. It is useful evidence, but it remains one case and one disease pattern\u2014not a universal protocol.<\/p>\n\n\n\n This is where many clinicians repeat tradition without checking the evidence.<\/p>\n\n\n\n A 2025 systematic review in the Revista de Dentisteria Est\u00e9tica e Restauradora<\/em> screened 1,188 titles and found one randomized controlled trial plus 103 non-comparative reports. Eighty reports used an evaluation phase; 23 did not. The review found no current evidence that an evaluation period improves clinical or patient-reported outcomes, although fixed provisional restorations can help manage expectations and treatment sequencing. Removable devices in the included RCT tended to create chewing difficulty, unclear speech, and esthetic discomfort.<\/p>\n\n\n\n That finding should make the profession uncomfortable.<\/p>\n\n\n\n It does not mean provisionals are useless. It means we should stop presenting a removable splint trial as scientific proof that the final OVD is correct. A fixed mock-up, bonded additive prototype, or well-controlled provisional can still reveal problems with tooth display, phonetics, lip support, occlusal contacts, hygiene access, and patient acceptance.<\/p>\n\n\n\n It is a communication and sequencing tool. Sometimes it is also a functional filter. But it is not magic.<\/p>\n\n\n\n My preference is simple: use a provisional phase when the case complexity, symptoms, patient uncertainty, or scale of irreversible treatment makes the information worth collecting. Do not use it as a ritual that delays treatment without producing decisions.<\/p>\n\n\n\n A full-mouth esthetic case can look excellent in a static retracted photograph and still fail in motion.<\/p>\n\n\n\n The maxillary incisal edge should be judged at rest, in a full smile, during speech, and from the profile. Increasing OVD can alter the apparent display, but it should not be used to compensate for a poorly planned tooth length or gingival architecture.<\/p>\n\n\n\n \u201cS\u201d sounds help assess the closest speaking space and anterior tooth relationship. \u201cF\u201d and \u201cV\u201d sounds help evaluate maxillary incisal edge position against the wet-dry line of the lower lip. A provisional that looks beautiful but creates a whistle, lisp, or forced mandibular posture is not finished.<\/p>\n\n\n\n The new anterior guidance must be designed with the posterior restorations, not after them. Overly steep guidance can overload incisors, canines, bonded ceramics, and implants. Too little guidance can leave destructive posterior excursive contacts.<\/p>\n\n\n\n The team must define where centric contacts belong, how evenly they should distribute, and how they will be verified. \u201cMake the bite even\u201d is not a usable laboratory instruction.<\/p>\n\n\n\n Patients may adapt to an increased OVD, but adaptation should not be confused with proof of ideal design. A patient can tolerate a mediocre provisional. That does not mean we should reproduce it in definitive ceramic.<\/p>\n\n\n\n Restorative space has no meaning without a material.<\/p>\n\n\n\n Lithium disilicate is a glass-ceramic built around Li\u2082Si\u2082O\u2085 crystals, while dental zirconia is based on ZrO\u2082 and may be supplied in formulations such as 3Y-TZP, 4Y-PSZ, or 5Y-PSZ. Those chemistries differ in strength, translucency, surface treatment, minimum thickness recommendations, and bonding behavior.<\/p>\n\n\n\n So a 1.0 mm clearance is not one universal thing.<\/p>\n\n\n\n The site\u2019s article on coordena\u00e7\u00e3o de materiais anteriores e posteriores na reabilita\u00e7\u00e3o de boca inteira<\/a> argues for assigning materials by visibility, support, thickness, load, and bonding predictability rather than using a simplistic front-versus-back rule.<\/p>\n\n\n\n For mixed-risk mouths, the related guide to combined E.max and zirconia restorative plans<\/a> is particularly relevant. It explains why a high-smile-line patient may need lithium disilicate in selected visible units while posterior bridges, implant crowns, or heavily loaded teeth may justify zirconia.<\/p>\n\n\n\n Here is the uncomfortable part: opening the bite to \u201cmake room for zirconia everywhere\u201d may be less conservative than using a smarter material map. And reducing every tooth for one ceramic family can destroy the biologic advantage the OVD increase was supposed to create.<\/p>\n\n\n\n Digital workflows are precise only when the input is correct.<\/p>\n\n\n\n A full-mouth case should include verified maxillary and mandibular scans, a reproducible bite at the proposed OVD, facial and intraoral photographs, a scan of the approved provisional or mock-up, stump shades, implant information, material assignments, and written occlusal instructions.<\/p>\n\n\n\n The laboratory should not be asked to guess the jaw position from two arches that do not articulate convincingly.<\/p>\n\n\n\n For anterior units, the site\u2019s checklist on records required for veneer cases<\/a> is a useful minimum standard: preparation scans, opposing scans, bite data, photographs, shade information, stump shades, functional notes, and approved esthetic references.<\/p>\n\n\n\n![\"What](\"https:\/\/artistdentallab.com\/wp-content\/uploads\/2026\/07\/What-Should-Be-Considered-When-Adjusting-Vertical-Dimension-in-Full-Mouth-Esthetic-Cases-1-1024x421.jpg\" "\\"\\"")
<\/figure>\n\n\n\nDiagnose the Existing Occlusion Before Designing a New One<\/h2>\n\n\n\n
\n
How Much OVD Increase Is Defensible?<\/h2>\n\n\n\n
\n
A Practical Decision Table for Increasing Vertical Dimension<\/h2>\n\n\n\n
Clinical finding<\/th> What it may justify<\/th> What it does not prove<\/th> Verification before definitive treatment<\/th><\/tr><\/thead> Severe generalized wear<\/td> Need for restorative space and occlusal redesign<\/td> Automatic loss of OVD<\/td> Facial analysis, eruption or compensation pattern, mounted or digital records<\/td><\/tr> Reduced incisal display<\/td> Possible change in edge position or OVD<\/td> That bite opening alone will improve the smile<\/td> Repose, smile, phonetics, lip mobility, approved mock-up<\/td><\/tr> Limited posterior clearance<\/td> Additive increase or material change<\/td> That all teeth require full coverage<\/td> Tooth-by-tooth clearance map and preparation review<\/td><\/tr> Mordida profunda<\/td> Need to redesign anterior coupling<\/td> That veneers can safely carry the correction<\/td> Guidance analysis, overjet, overbite, parafunction, enamel support<\/td><\/tr> Muscle or joint symptoms<\/td> Need for diagnosis and reversible management<\/td> That an OVD increase will treat TMD<\/td> Joint and muscle examination, reversible stabilization when indicated<\/td><\/tr> Failed prior full-mouth work<\/td> Need to reassess the whole system<\/td> That the previous OVD was too low<\/td> Failure analysis: contacts, materials, support, bonding, design, habits<\/td><\/tr> Esthetic demand for longer teeth<\/td> Possible additive length and facially driven design<\/td> That longer crowns require bite raising<\/td> Gingival levels, crown proportions, lip dynamics, phonetics<\/td><\/tr> Mixed implants and natural teeth<\/td> Need for differentiated load management<\/td> That one material or contact scheme fits every unit<\/td> Implant position, support type, occlusal load, retrievability<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n The Provisional Phase: Useful, but Not Sacred<\/h2>\n\n\n\n
Esthetics, Phonetics, and Function Must Agree<\/h2>\n\n\n\n
Incisal Edge Position<\/h3>\n\n\n\n
Phonetics<\/h3>\n\n\n\n
Anterior Guidance<\/h3>\n\n\n\n
Posterior Stops<\/h3>\n\n\n\n
Patient Adaptation<\/h3>\n\n\n\n
Material Selection Changes the Vertical-Dimension Equation<\/h2>\n\n\n\n
![\"What](\"https:\/\/artistdentallab.com\/wp-content\/uploads\/2026\/07\/What-Should-Be-Considered-When-Adjusting-Vertical-Dimension-in-Full-Mouth-Esthetic-Cases-2-1024x588.jpg\" "\\"\\"")
<\/figure>\n\n\n\nDigital Records Can Preserve an Error Perfectly<\/h2>\n\n\n\n