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Study Type: Retrospective cohort study

Key Question: How accurately does clear aligner therapy (Invisalign) achieve planned moderate-to-severe rotational corrections of maxillary canines?

Key Findings:

• Mean accuracy of planned canine rotation (≥5°) was only 64%, based on 114 canines in 75 patients.
• Planned rotation direction was correctly achieved in 77% of cases; combination rotations were least predictable, with 51% rotating in an unintended direction.
• Faster planned rotational velocity per aligner stage significantly reduced accuracy (each 1°/aligner increase associated with a 5.35° shortfall, P<0.05); overall rotation direction itself did not significantly affect accuracy.

Clinical Relevance: UK orthodontists using clear aligners should anticipate under-correction of canine rotations, particularly with rapid staged movements or combination rotation patterns, and plan overcorrection or refinement stages accordingly.

Limitations: Retrospective design using a single aligner system and initial aligner series only, limiting generalisability to other systems or full treatment courses.

Study Type: Retrospective method-comparison study

Key Question: How accurately does an automated, rule-based digital landmarking algorithm replicate manual landmark placement and the resulting orthodontic quality indices (ABO eCRE, PAR)?

Key Findings:

• Automated landmark placement was accurate for cusp and incisal points (mean deviation ≤1 mm), but least accurate for vestibular marginal gingival landmarks.
• Mean deviations across tooth groups ranged from 0.54 mm (second molars, 95% CI 0.49–0.59) to 0.83 mm (canines, 95% CI 0.80–0.85), with no systematic directional bias.
• Index-level differences were small for PAR (−0.08 to 0.74 points) but larger for ABO eCRE (1.90–3.98 points), indicating index-specific sensitivity to landmark error.

Clinical Relevance: As UK practices increasingly adopt digital model analysis for treatment planning and outcome audit (e.g., PAR for NHS commissioning), clinicians should be aware that automated landmarking is generally reliable but may misjudge gingival margins, affecting scoring accuracy.

Limitations: Single software platform and expert-defined reference standard limit generalisability to other automated systems and clinician skill levels.

Study Type: Retrospective cohort analysis

Key Question: Does an integrated orthodontic uprighting–retention–restorative pathway improve outcomes for tipped teeth compared with non-standardised management (direct restoration or uncoordinated orthodontics)?

Key Findings:

• Integrated pathway showed higher satisfactory functional recovery (89.8% vs 75.3%, p=0.006) and occlusal stability (86.6% vs 70.1%, p=0.004).
• Fewer complications (13.4% vs 27.3%, p=0.011) and lower retreatment rates (8.7% vs 18.2%, p=0.028).
• Exploratory adjusted analysis suggested severe initial tipping and restoration without uprighting were linked to worse composite outcomes, but model stability was limited by low events-per-variable ratio.

Clinical Relevance: Supports UK multidisciplinary practice of coordinating orthodontic uprighting with structured retention and restorative follow-up rather than isolated restorative management of tipped teeth, relevant to shared-care pathways between orthodontists, restorative dentists, and GDPs.

Limitations: Non-randomised treatment allocation and reliance on routine clinical records mean findings are hypothesis-generating only, not causal.

Study Type: Systematic review and meta-analysis (9 studies: 3 RCTs, 2 NRCTs, 4 retrospective cohorts)

Key Question: What is the success rate of buccal shelf miniscrew implants (BS-MSI) and which factors affect their stability during orthodontic treatment?

Key Findings:

• Pooled success rate of 93% across 2366 BS-MSI (95% CI 0.81–1.00), though the wide prediction interval (0.39–1) reflects substantial uncertainty
• Success rate was similar regardless of sample size (>100 vs <100 screws: 91% vs comparable rates)
• Meta-regression showed an inverse relationship between patient age and success rate; considerable heterogeneity persisted across subgroups, and risk of bias was high in 4 of 9 studies

Clinical Relevance: BS-MSI offer a reliable extra-alveolar anchorage option for mandibular arch distalisation and crowding management, potentially reducing reliance on orthognathic surgery referrals within NHS orthodontic pathways—though younger patients may show better outcomes.

Limitations: High heterogeneity, low certainty of evidence, and substantial risk of bias in most included studies limit confidence in the pooled success rate and factor analysis.